Improve error handling

Gopkg.lock

@@ -1,4 +1,6 @@
-memo = "2564b0b342a1586a24a3ff5356636c822f6351da32f8ee9497ab8694855e80b1"
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+memo = "3aa439f7fd3be3f2266640afdb7c86c6225490d5e1e14404bef5be1eaab6f640"
 
 [[projects]]
   name = "github.com/davecgh/go-spew"
@@ -6,6 +8,12 @@ memo = "2564b0b342a1586a24a3ff5356636c822f6351da32f8ee9497ab8694855e80b1"
   revision = "346938d642f2ec3594ed81d874461961cd0faa76"
   version = "v1.1.0"
 
+[[projects]]
+  name = "github.com/go-ini/ini"
+  packages = ["."]
+  revision = "36da989cdc560b989d8f195aec46214d33665d20"
+  version = "v1.27.2"
+
 [[projects]]
   name = "github.com/gorilla/context"
   packages = ["."]
@@ -13,22 +21,34 @@ memo = "2564b0b342a1586a24a3ff5356636c822f6351da32f8ee9497ab8694855e80b1"
   version = "v1.1"
 
 [[projects]]
+  branch = "master"
   name = "github.com/gorilla/mux"
   packages = ["."]
-  revision = "bcd8bc72b08df0f70df986b97f95590779502d31"
+  revision = "043ee6597c29786140136a5747b6a886364f5282"
-  version = "v1.4.0"
 
 [[projects]]
   branch = "master"
   name = "github.com/mastertinner/adapters"
   packages = [".","logging"]
-  revision = "b7852c480132eb2565591fdb1b6738aa0bdcc9c9"
+  revision = "842cd783e24e05aaf08852d5f6279dbcfd51ae4b"
 
 [[projects]]
+  branch = "master"
+  name = "github.com/minio/go-homedir"
+  packages = ["."]
+  revision = "a7ee80e4c344cab722502d3f074c5b7245d0bbe7"
+
+[[projects]]
+  branch = "master"
   name = "github.com/minio/minio-go"
-  packages = [".","pkg/encrypt","pkg/policy","pkg/s3signer","pkg/s3utils","pkg/set"]
+  packages = [".","pkg/credentials","pkg/encrypt","pkg/policy","pkg/s3signer","pkg/s3utils","pkg/set"]
-  revision = "2f03abaa07d8bc57faef16cda7655ea62a7e0bed"
+  revision = "46e4328e64b7c53669b14183610a221c2f06f460"
-  version = "v2.1.0"
+
+[[projects]]
+  name = "github.com/pkg/errors"
+  packages = ["."]
+  revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
+  version = "v0.8.0"
 
 [[projects]]
   name = "github.com/pmezard/go-difflib"

Gopkg.toml

@@ -56,16 +56,24 @@
   version = "^1.1.0"
 
 [[dependencies]]
+  name = "github.com/gorilla/context"
+  version = "^1.1.0"
+
+[[dependencies]]
+  branch = "master"
   name = "github.com/gorilla/mux"
-  version = "^1.3.0"
 
 [[dependencies]]
   branch = "master"
   name = "github.com/mastertinner/adapters"
 
 [[dependencies]]
+  branch = "master"
   name = "github.com/minio/minio-go"
-  version = "^2.1.0"
+
+[[dependencies]]
+  name = "github.com/pkg/errors"
+  version = "^0.8.0"
 
 [[dependencies]]
   name = "github.com/pmezard/go-difflib"

bucket_view.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/gorilla/mux"
 	minio "github.com/minio/minio-go"
+	"github.com/pkg/errors"
 )
 
 // objectWithIcon is a minio object with an added icon.
@@ -32,7 +33,7 @@ func BucketViewHandler(s3 S3) http.Handler {
 
 		t, err := template.ParseFiles(l, p)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errParsingTemplates))
 			return
 		}
 
@@ -41,12 +42,7 @@ func BucketViewHandler(s3 S3) http.Handler {
 		objectCh := s3.ListObjectsV2(bucketName, "", true, doneCh)
 		for object := range objectCh {
 			if object.Err != nil {
-				code := http.StatusInternalServerError
+				handleHTTPError(w, errors.Wrap(object.Err, "error listing objects"))
-				if object.Err.Error() == ErrBucketDoesNotExist {
-					code = http.StatusNotFound
-				}
-
-				handleHTTPError(w, code, object.Err)
 				return
 			}
 			obj := objectWithIcon{object, icon(object.Key)}
@@ -60,7 +56,7 @@ func BucketViewHandler(s3 S3) http.Handler {
 
 		err = t.ExecuteTemplate(w, "layout", page)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errExecutingTemplate))
 			return
 		}
 	})

bucket_view_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 
 	"github.com/gorilla/mux"
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	minio "github.com/minio/minio-go"
 	"github.com/stretchr/testify/assert"
 )
@@ -18,7 +18,7 @@ func TestBucketViewHandler(t *testing.T) {
 	assert := assert.New(t)
 
 	cases := map[string]struct {
-		s3                   s3manager.S3
+		s3                   S3
 		bucketName           string
 		expectedStatusCode   int
 		expectedBodyContains string
@@ -106,7 +106,7 @@ func TestBucketViewHandler(t *testing.T) {
 		r.
 			Methods(http.MethodGet).
 			Path("/buckets/{bucketName}").
-			Handler(s3manager.BucketViewHandler(tc.s3))
+			Handler(BucketViewHandler(tc.s3))
 
 		ts := httptest.NewServer(r)
 		defer ts.Close()

buckets_view.go

@@ -4,6 +4,8 @@ import (
 	"html/template"
 	"net/http"
 	"path"
+
+	"github.com/pkg/errors"
 )
 
 // BucketsViewHandler renders all buckets on an HTML page.
@@ -14,19 +16,19 @@ func BucketsViewHandler(s3 S3) http.Handler {
 
 		t, err := template.ParseFiles(l, p)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errParsingTemplates))
 			return
 		}
 
 		buckets, err := s3.ListBuckets()
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error listing buckets"))
 			return
 		}
 
 		err = t.ExecuteTemplate(w, "layout", buckets)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errExecutingTemplate))
 			return
 		}
 	})

buckets_view_test.go

@@ -6,7 +6,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	minio "github.com/minio/minio-go"
 	"github.com/stretchr/testify/assert"
 )
@@ -15,7 +15,7 @@ func TestBucketsViewHandler(t *testing.T) {
 	assert := assert.New(t)
 
 	cases := map[string]struct {
-		s3                   s3manager.S3
+		s3                   S3
 		expectedStatusCode   int
 		expectedBodyContains string
 	}{
@@ -47,7 +47,7 @@ func TestBucketsViewHandler(t *testing.T) {
 		assert.NoError(err, tcID)
 
 		rr := httptest.NewRecorder()
-		handler := s3manager.BucketsViewHandler(tc.s3)
+		handler := BucketsViewHandler(tc.s3)
 
 		handler.ServeHTTP(rr, req)
 		resp := rr.Result()

cmd/s3manager/main.go

@@ -9,8 +9,9 @@ import (
 	"github.com/gorilla/mux"
 	"github.com/mastertinner/adapters"
 	"github.com/mastertinner/adapters/logging"
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	minio "github.com/minio/minio-go"
+	"github.com/pkg/errors"
 )
 
 func main() {
@@ -37,7 +38,7 @@ func main() {
 		s3, err = minio.New(*endpoint, *accessKeyID, *secretAccessKey, true)
 	}
 	if err != nil {
-		log.Fatalln(err)
+		log.Fatalln(errors.Wrap(err, "error creating s3 client"))
 	}
 
 	// Set up logger
@@ -56,58 +57,58 @@ func main() {
 		Methods(http.MethodGet).
 		Path("/buckets").
 		Handler(adapters.Adapt(
-			s3manager.BucketsViewHandler(s3),
+			BucketsViewHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodGet).
 		Path("/buckets/{bucketName}").
 		Handler(adapters.Adapt(
-			s3manager.BucketViewHandler(s3),
+			BucketViewHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodPost).
 		Path("/api/buckets").
 		Handler(adapters.Adapt(
-			s3manager.CreateBucketHandler(s3),
+			CreateBucketHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodDelete).
 		Path("/api/buckets/{bucketName}").
 		Handler(adapters.Adapt(
-			s3manager.DeleteBucketHandler(s3),
+			DeleteBucketHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodPost).
-		Headers(s3manager.HeaderContentType, s3manager.ContentTypeJSON).
+		Headers(HeaderContentType, ContentTypeJSON).
 		Path("/api/buckets/{bucketName}/objects").
 		Handler(adapters.Adapt(
-			s3manager.CopyObjectHandler(s3),
+			CopyObjectHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodPost).
-		HeadersRegexp(s3manager.HeaderContentType, s3manager.ContentTypeMultipartForm).
+		HeadersRegexp(HeaderContentType, ContentTypeMultipartForm).
 		Path("/api/buckets/{bucketName}/objects").
 		Handler(adapters.Adapt(
-			s3manager.CreateObjectHandler(s3),
+			CreateObjectHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodGet).
 		Path("/api/buckets/{bucketName}/objects/{objectName}").
 		Handler(adapters.Adapt(
-			s3manager.GetObjectHandler(s3),
+			GetObjectHandler(s3),
 			logging.Handler(logger),
 		))
 	r.
 		Methods(http.MethodDelete).
 		Path("/api/buckets/{bucketName}/objects/{objectName}").
 		Handler(adapters.Adapt(
-			s3manager.DeleteObjectHandler(s3),
+			DeleteObjectHandler(s3),
 			logging.Handler(logger),
 		))
 

copy_object.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"net/http"
 
+	"github.com/pkg/errors"
+
 	minio "github.com/minio/minio-go"
 )
 
@@ -23,7 +25,7 @@ func CopyObjectHandler(s3 S3) http.Handler {
 
 		err := json.NewDecoder(r.Body).Decode(&copy)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errDecodingBody))
 			return
 		}
 
@@ -31,7 +33,7 @@ func CopyObjectHandler(s3 S3) http.Handler {
 		objectSource := fmt.Sprintf("/%s/%s", copy.SourceBucketName, copy.SourceObjectName)
 		err = s3.CopyObject(copy.BucketName, copy.ObjectName, objectSource, copyConds)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error copying object"))
 			return
 		}
 
@@ -40,7 +42,7 @@ func CopyObjectHandler(s3 S3) http.Handler {
 
 		err = json.NewEncoder(w).Encode(copy)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errEncodingJSON))
 			return
 		}
 	})

create-bucket_test.go

@@ -7,7 +7,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -15,7 +15,7 @@ func TestCreateBucketHandler(t *testing.T) {
 	assert := assert.New(t)
 
 	cases := map[string]struct {
-		s3                   s3manager.S3
+		s3                   S3
 		body                 string
 		expectedStatusCode   int
 		expectedBodyContains string
@@ -53,7 +53,7 @@ func TestCreateBucketHandler(t *testing.T) {
 		assert.NoError(err, tcID)
 
 		rr := httptest.NewRecorder()
-		handler := s3manager.CreateBucketHandler(tc.s3)
+		handler := CreateBucketHandler(tc.s3)
 
 		handler.ServeHTTP(rr, req)
 		resp := rr.Result()

create_bucket.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	minio "github.com/minio/minio-go"
+	"github.com/pkg/errors"
 )
 
 // CreateBucketHandler creates a new bucket.
@@ -14,13 +15,13 @@ func CreateBucketHandler(s3 S3) http.Handler {
 
 		err := json.NewDecoder(r.Body).Decode(&bucket)
 		if err != nil {
-			handleHTTPError(w, http.StatusUnprocessableEntity, err)
+			handleHTTPError(w, errors.Wrap(err, errDecodingBody))
 			return
 		}
 
 		err = s3.MakeBucket(bucket.Name, "")
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error making bucket"))
 			return
 		}
 
@@ -29,7 +30,7 @@ func CreateBucketHandler(s3 S3) http.Handler {
 
 		err = json.NewEncoder(w).Encode(bucket)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, errEncodingJSON))
 			return
 		}
 	})

create_object.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/pkg/errors"
 )
 
 // CreateObjectHandler uploads a new object.
@@ -12,26 +13,26 @@ func CreateObjectHandler(s3 S3) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		err := r.ParseMultipartForm(32 << 20)
 		if err != nil {
-			handleHTTPError(w, http.StatusUnprocessableEntity, err)
+			handleHTTPError(w, errors.Wrap(err, errParsingForm))
 			return
 		}
 
 		file, handler, err := r.FormFile("file")
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error getting file from form"))
 			return
 		}
 		defer func() {
 			err = file.Close()
 			if err != nil {
-				log.Fatalln(err)
+				log.Fatalln(errors.Wrap(err, "error closing file"))
 			}
 		}()
 
 		bucketName := mux.Vars(r)["bucketName"]
 		_, err = s3.PutObject(bucketName, handler.Filename, file, contentTypeOctetStream)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error putting object"))
 			return
 		}
 

delete_bucket.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/pkg/errors"
 )
 
 // DeleteBucketHandler deletes a bucket.
@@ -12,7 +13,7 @@ func DeleteBucketHandler(s3 S3) http.Handler {
 		bucketName := mux.Vars(r)["bucketName"]
 		err := s3.RemoveBucket(bucketName)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error removing bucket"))
 			return
 		}
 

delete_bucket_test.go

@@ -6,7 +6,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -14,7 +14,7 @@ func TestDeleteBucketHandler(t *testing.T) {
 	assert := assert.New(t)
 
 	cases := map[string]struct {
-		s3                   s3manager.S3
+		s3                   S3
 		expectedStatusCode   int
 		expectedBodyContains string
 	}{
@@ -37,7 +37,7 @@ func TestDeleteBucketHandler(t *testing.T) {
 		assert.NoError(err, tcID)
 
 		rr := httptest.NewRecorder()
-		handler := s3manager.DeleteBucketHandler(tc.s3)
+		handler := DeleteBucketHandler(tc.s3)
 
 		handler.ServeHTTP(rr, req)
 		resp := rr.Result()

delete_object.go

@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/pkg/errors"
 )
 
 // DeleteObjectHandler deletes an object.
@@ -14,7 +15,7 @@ func DeleteObjectHandler(s3 S3) http.Handler {
 		objectName := vars["objectName"]
 		err := s3.RemoveObject(bucketName, objectName)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error removing object"))
 			return
 		}
 

delete_object_test.go

@@ -6,7 +6,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -14,7 +14,7 @@ func TestDeleteObjectHandler(t *testing.T) {
 	assert := assert.New(t)
 
 	cases := map[string]struct {
-		s3                   s3manager.S3
+		s3                   S3
 		expectedStatusCode   int
 		expectedBodyContains string
 	}{
@@ -37,7 +37,7 @@ func TestDeleteObjectHandler(t *testing.T) {
 		assert.NoError(err, tcID)
 
 		rr := httptest.NewRecorder()
-		handler := s3manager.DeleteObjectHandler(tc.s3)
+		handler := DeleteObjectHandler(tc.s3)
 
 		handler.ServeHTTP(rr, req)
 

errors.go

@@ -3,22 +3,43 @@ package s3manager
 import (
 	"log"
 	"net/http"
+	"strings"
+
+	"github.com/pkg/errors"
 )
 
-// Error codes that may be returned from an S3 backend.
+// Error codes commonly used throughout the application
 const (
-	ErrBucketDoesNotExist = "The specified bucket does not exist."
+	errDecodingBody      = "error decoding body JSON"
-	ErrKeyDoesNotExist    = "The specified key does not exist."
+	errEncodingJSON      = "error encoding JSON"
+	errExecutingTemplate = "error executing template"
+	errParsingForm       = "error parsing form"
+	errParsingTemplates  = "error parsing template files"
+)
+
+// Errors that may be returned from an S3 client.
+var (
+	ErrBucketDoesNotExist = errors.New("The specified bucket does not exist.")
+	ErrKeyDoesNotExist    = errors.New("The specified key does not exist.")
 )
 
 // handleHTTPError handles HTTP errors.
-func handleHTTPError(w http.ResponseWriter, statusCode int, err error) {
+func handleHTTPError(w http.ResponseWriter, err error) {
-	msg := http.StatusText(statusCode)
+	code := http.StatusInternalServerError
-	http.Error(w, msg, statusCode)
+	if errors.Cause(err) == ErrBucketDoesNotExist {
+		code = http.StatusNotFound
+	} else if errors.Cause(err) == ErrKeyDoesNotExist {
+		code = http.StatusNotFound
+	} else if strings.Contains(err.Error(), errDecodingBody) {
+		code = http.StatusUnprocessableEntity
+	} else if strings.Contains(err.Error(), errParsingForm) {
+		code = http.StatusUnprocessableEntity
+	}
 
-	logMsg := msg
+	http.Error(w, http.StatusText(code), code)
-	if err != nil {
+
-		logMsg = logMsg + ": " + err.Error()
+	// Log if server error
+	if code >= 500 {
+		log.Println(err)
 	}
-	log.Println(logMsg)
 }

get_object.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/pkg/errors"
 )
 
 // GetObjectHandler downloads an object to the client.
@@ -17,7 +18,7 @@ func GetObjectHandler(s3 S3) http.Handler {
 
 		object, err := s3.GetObject(bucketName, objectName)
 		if err != nil {
-			handleHTTPError(w, http.StatusInternalServerError, err)
+			handleHTTPError(w, errors.Wrap(err, "error getting object"))
 			return
 		}
 
@@ -26,11 +27,7 @@ func GetObjectHandler(s3 S3) http.Handler {
 
 		_, err = io.Copy(w, object)
 		if err != nil {
-			code := http.StatusInternalServerError
+			handleHTTPError(w, errors.Wrap(err, "error copying object to response writer"))
-			if err.Error() == ErrBucketDoesNotExist || err.Error() == ErrKeyDoesNotExist {
-				code = http.StatusNotFound
-			}
-			handleHTTPError(w, code, err)
 			return
 		}
 	})

get_object_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 
 	"github.com/gorilla/mux"
-	"github.com/mastertinner/s3manager"
+	. "github.com/mastertinner/s3manager"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -17,7 +17,7 @@ func TestGetObjectHandler(t *testing.T) {
 	assert := assert.New(t)
 
 	cases := map[string]struct {
-		s3                   s3manager.S3
+		s3                   S3
 		bucketName           string
 		objectName           string
 		expectedStatusCode   int
@@ -39,7 +39,7 @@ func TestGetObjectHandler(t *testing.T) {
 		r.
 			Methods(http.MethodGet).
 			Path("/buckets/{bucketName}/objects/{objectName}").
-			Handler(s3manager.GetObjectHandler(tc.s3))
+			Handler(GetObjectHandler(tc.s3))
 
 		ts := httptest.NewServer(r)
 		defer ts.Close()

s3_test.go

@@ -1,9 +1,9 @@
 package s3manager_test
 
 import (
-	"errors"
 	"io"
 
+	. "github.com/mastertinner/s3manager"
 	minio "github.com/minio/minio-go"
 )
 
@@ -52,7 +52,7 @@ func (s *s3Mock) ListObjectsV2(name string, p string, r bool, d <-chan struct{})
 	}
 	if !found {
 		s.Objects = append(s.Objects, minio.ObjectInfo{
-			Err: errors.New("The specified bucket does not exist."),
+			Err: ErrBucketDoesNotExist,
 		})
 
 	}

s3manager.go

@@ -6,7 +6,7 @@ const (
 	HeaderContentType        = "Content-Type"
 	ContentTypeJSON          = "application/json"
 	ContentTypeMultipartForm = "multipart/form-data"
-	tmplDirectory            = "templates"
 	headerContentDisposition = "Content-Disposition"
 	contentTypeOctetStream   = "application/octet-stream"
+	tmplDirectory            = "templates"
 )

vendor/github.com/go-ini/ini/.gitignore

@@ -0,0 +1,5 @@
+testdata/conf_out.ini
+ini.sublime-project
+ini.sublime-workspace
+testdata/conf_reflect.ini
+.idea

vendor/github.com/go-ini/ini/.travis.yml

@@ -0,0 +1,13 @@
+sudo: false
+language: go
+go:
+  - 1.4.x
+  - 1.5.x
+  - 1.6.x
+  - 1.7.x
+  - master
+
+script: 
+  - go get golang.org/x/tools/cmd/cover
+  - go get github.com/smartystreets/goconvey
+  - go test -v -cover -race

vendor/github.com/go-ini/ini/LICENSE

@@ -0,0 +1,191 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+"License" shall mean the terms and conditions for use, reproduction, and
+distribution as defined by Sections 1 through 9 of this document.
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+owner that is granting the License.
+
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+
+"Work" shall mean the work of authorship, whether in Source or Object form, made
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+"Derivative Works" shall mean any work, whether in Source or Object form, that
+is based on (or derived from) the Work and for which the editorial revisions,
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+"Contribution" shall mean any work of authorship, including the original version
+of the Work and any modifications or additions to that Work or Derivative Works
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+of whom a Contribution has been received by Licensor and subsequently
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+2. Grant of Copyright License.
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+Subject to the terms and conditions of this License, each Contributor hereby
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+
+5. Submission of Contributions.
+
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+for inclusion in the Work by You to the Licensor shall be under the terms and
+conditions of this License, without any additional terms or conditions.
+Notwithstanding the above, nothing herein shall supersede or modify the terms of
+any separate license agreement you may have executed with Licensor regarding
+such Contributions.
+
+6. Trademarks.
+
+This License does not grant permission to use the trade names, trademarks,
+service marks, or product names of the Licensor, except as required for
+reasonable and customary use in describing the origin of the Work and
+reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty.
+
+Unless required by applicable law or agreed to in writing, Licensor provides the
+Work (and each Contributor provides its Contributions) on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
+including, without limitation, any warranties or conditions of TITLE,
+NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
+solely responsible for determining the appropriateness of using or
+redistributing the Work and assume any risks associated with Your exercise of
+permissions under this License.
+
+8. Limitation of Liability.
+
+In no event and under no legal theory, whether in tort (including negligence),
+contract, or otherwise, unless required by applicable law (such as deliberate
+and grossly negligent acts) or agreed to in writing, shall any Contributor be
+liable to You for damages, including any direct, indirect, special, incidental,
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+
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+incurred by, or claims asserted against, such Contributor by reason of your
+accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work
+
+To apply the Apache License to your work, attach the following boilerplate
+notice, with the fields enclosed by brackets "[]" replaced with your own
+identifying information. (Don't include the brackets!) The text should be
+enclosed in the appropriate comment syntax for the file format. We also
+recommend that a file or class name and description of purpose be included on
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/go-ini/ini/Makefile

@@ -0,0 +1,12 @@
+.PHONY: build test bench vet
+
+build: vet bench
+
+test:
+	go test -v -cover -race
+
+bench:
+	go test -v -cover -race -test.bench=. -test.benchmem
+
+vet:
+	go vet

vendor/github.com/go-ini/ini/README.md

@@ -0,0 +1,740 @@
+INI [![Build Status](https://travis-ci.org/go-ini/ini.svg?branch=master)](https://travis-ci.org/go-ini/ini) [![Sourcegraph](https://sourcegraph.com/github.com/go-ini/ini/-/badge.svg)](https://sourcegraph.com/github.com/go-ini/ini?badge)
+===
+
+![](https://avatars0.githubusercontent.com/u/10216035?v=3&s=200)
+
+Package ini provides INI file read and write functionality in Go.
+
+[简体中文](README_ZH.md)
+
+## Feature
+
+- Load multiple data sources(`[]byte`, file and `io.ReadCloser`) with overwrites.
+- Read with recursion values.
+- Read with parent-child sections.
+- Read with auto-increment key names.
+- Read with multiple-line values.
+- Read with tons of helper methods.
+- Read and convert values to Go types.
+- Read and **WRITE** comments of sections and keys.
+- Manipulate sections, keys and comments with ease.
+- Keep sections and keys in order as you parse and save.
+
+## Installation
+
+To use a tagged revision:
+
+	go get gopkg.in/ini.v1
+
+To use with latest changes:
+
+	go get github.com/go-ini/ini
+
+Please add `-u` flag to update in the future.
+
+### Testing
+
+If you want to test on your machine, please apply `-t` flag:
+
+	go get -t gopkg.in/ini.v1
+
+Please add `-u` flag to update in the future.
+
+## Getting Started
+
+### Loading from data sources
+
+A **Data Source** is either raw data in type `[]byte`, a file name with type `string` or `io.ReadCloser`. You can load **as many data sources as you want**. Passing other types will simply return an error.
+
+```go
+cfg, err := ini.Load([]byte("raw data"), "filename", ioutil.NopCloser(bytes.NewReader([]byte("some other data"))))
+```
+
+Or start with an empty object:
+
+```go
+cfg := ini.Empty()
+```
+
+When you cannot decide how many data sources to load at the beginning, you will still be able to **Append()** them later.
+
+```go
+err := cfg.Append("other file", []byte("other raw data"))
+```
+
+If you have a list of files with possibilities that some of them may not available at the time, and you don't know exactly which ones, you can use `LooseLoad` to ignore nonexistent files without returning error.
+
+```go
+cfg, err := ini.LooseLoad("filename", "filename_404")
+```
+
+The cool thing is, whenever the file is available to load while you're calling `Reload` method, it will be counted as usual.
+
+#### Ignore cases of key name
+
+When you do not care about cases of section and key names, you can use `InsensitiveLoad` to force all names to be lowercased while parsing.
+
+```go
+cfg, err := ini.InsensitiveLoad("filename")
+//...
+
+// sec1 and sec2 are the exactly same section object
+sec1, err := cfg.GetSection("Section")
+sec2, err := cfg.GetSection("SecTIOn")
+
+// key1 and key2 are the exactly same key object
+key1, err := sec1.GetKey("Key")
+key2, err := sec2.GetKey("KeY")
+```
+
+#### MySQL-like boolean key 
+
+MySQL's configuration allows a key without value as follows:
+
+```ini
+[mysqld]
+...
+skip-host-cache
+skip-name-resolve
+```
+
+By default, this is considered as missing value. But if you know you're going to deal with those cases, you can assign advanced load options:
+
+```go
+cfg, err := LoadSources(LoadOptions{AllowBooleanKeys: true}, "my.cnf"))
+```
+
+The value of those keys are always `true`, and when you save to a file, it will keep in the same foramt as you read.
+
+To generate such keys in your program, you could use `NewBooleanKey`:
+
+```go
+key, err := sec.NewBooleanKey("skip-host-cache")
+```
+
+#### Comment
+
+Take care that following format will be treated as comment:
+
+1. Line begins with `#` or `;`
+2. Words after `#` or `;`
+3. Words after section name (i.e words after `[some section name]`)
+
+If you want to save a value with `#` or `;`, please quote them with ``` ` ``` or ``` """ ```.
+
+### Working with sections
+
+To get a section, you would need to:
+
+```go
+section, err := cfg.GetSection("section name")
+```
+
+For a shortcut for default section, just give an empty string as name:
+
+```go
+section, err := cfg.GetSection("")
+```
+
+When you're pretty sure the section exists, following code could make your life easier:
+
+```go
+section := cfg.Section("section name")
+```
+
+What happens when the section somehow does not exist? Don't panic, it automatically creates and returns a new section to you.
+
+To create a new section:
+
+```go
+err := cfg.NewSection("new section")
+```
+
+To get a list of sections or section names:
+
+```go
+sections := cfg.Sections()
+names := cfg.SectionStrings()
+```
+
+### Working with keys
+
+To get a key under a section:
+
+```go
+key, err := cfg.Section("").GetKey("key name")
+```
+
+Same rule applies to key operations:
+
+```go
+key := cfg.Section("").Key("key name")
+```
+
+To check if a key exists:
+
+```go
+yes := cfg.Section("").HasKey("key name")
+```
+
+To create a new key:
+
+```go
+err := cfg.Section("").NewKey("name", "value")
+```
+
+To get a list of keys or key names:
+
+```go
+keys := cfg.Section("").Keys()
+names := cfg.Section("").KeyStrings()
+```
+
+To get a clone hash of keys and corresponding values:
+
+```go
+hash := cfg.Section("").KeysHash()
+```
+
+### Working with values
+
+To get a string value:
+
+```go
+val := cfg.Section("").Key("key name").String()
+```
+
+To validate key value on the fly:
+
+```go
+val := cfg.Section("").Key("key name").Validate(func(in string) string {
+	if len(in) == 0 {
+		return "default"
+	}
+	return in
+})
+```
+
+If you do not want any auto-transformation (such as recursive read) for the values, you can get raw value directly (this way you get much better performance):
+
+```go
+val := cfg.Section("").Key("key name").Value()
+```
+
+To check if raw value exists:
+
+```go
+yes := cfg.Section("").HasValue("test value")
+```
+
+To get value with types:
+
+```go
+// For boolean values:
+// true when value is: 1, t, T, TRUE, true, True, YES, yes, Yes, y, ON, on, On
+// false when value is: 0, f, F, FALSE, false, False, NO, no, No, n, OFF, off, Off
+v, err = cfg.Section("").Key("BOOL").Bool()
+v, err = cfg.Section("").Key("FLOAT64").Float64()
+v, err = cfg.Section("").Key("INT").Int()
+v, err = cfg.Section("").Key("INT64").Int64()
+v, err = cfg.Section("").Key("UINT").Uint()
+v, err = cfg.Section("").Key("UINT64").Uint64()
+v, err = cfg.Section("").Key("TIME").TimeFormat(time.RFC3339)
+v, err = cfg.Section("").Key("TIME").Time() // RFC3339
+
+v = cfg.Section("").Key("BOOL").MustBool()
+v = cfg.Section("").Key("FLOAT64").MustFloat64()
+v = cfg.Section("").Key("INT").MustInt()
+v = cfg.Section("").Key("INT64").MustInt64()
+v = cfg.Section("").Key("UINT").MustUint()
+v = cfg.Section("").Key("UINT64").MustUint64()
+v = cfg.Section("").Key("TIME").MustTimeFormat(time.RFC3339)
+v = cfg.Section("").Key("TIME").MustTime() // RFC3339
+
+// Methods start with Must also accept one argument for default value
+// when key not found or fail to parse value to given type.
+// Except method MustString, which you have to pass a default value.
+
+v = cfg.Section("").Key("String").MustString("default")
+v = cfg.Section("").Key("BOOL").MustBool(true)
+v = cfg.Section("").Key("FLOAT64").MustFloat64(1.25)
+v = cfg.Section("").Key("INT").MustInt(10)
+v = cfg.Section("").Key("INT64").MustInt64(99)
+v = cfg.Section("").Key("UINT").MustUint(3)
+v = cfg.Section("").Key("UINT64").MustUint64(6)
+v = cfg.Section("").Key("TIME").MustTimeFormat(time.RFC3339, time.Now())
+v = cfg.Section("").Key("TIME").MustTime(time.Now()) // RFC3339
+```
+
+What if my value is three-line long?
+
+```ini
+[advance]
+ADDRESS = """404 road,
+NotFound, State, 5000
+Earth"""
+```
+
+Not a problem!
+
+```go
+cfg.Section("advance").Key("ADDRESS").String()
+
+/* --- start ---
+404 road,
+NotFound, State, 5000
+Earth
+------  end  --- */
+```
+
+That's cool, how about continuation lines?
+
+```ini
+[advance]
+two_lines = how about \
+	continuation lines?
+lots_of_lines = 1 \
+	2 \
+	3 \
+	4
+```
+
+Piece of cake!
+
+```go
+cfg.Section("advance").Key("two_lines").String() // how about continuation lines?
+cfg.Section("advance").Key("lots_of_lines").String() // 1 2 3 4
+```
+
+Well, I hate continuation lines, how do I disable that?
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{
+	IgnoreContinuation: true,
+}, "filename")
+```
+
+Holy crap! 
+
+Note that single quotes around values will be stripped:
+
+```ini
+foo = "some value" // foo: some value
+bar = 'some value' // bar: some value
+```
+
+That's all? Hmm, no.
+
+#### Helper methods of working with values
+
+To get value with given candidates:
+
+```go
+v = cfg.Section("").Key("STRING").In("default", []string{"str", "arr", "types"})
+v = cfg.Section("").Key("FLOAT64").InFloat64(1.1, []float64{1.25, 2.5, 3.75})
+v = cfg.Section("").Key("INT").InInt(5, []int{10, 20, 30})
+v = cfg.Section("").Key("INT64").InInt64(10, []int64{10, 20, 30})
+v = cfg.Section("").Key("UINT").InUint(4, []int{3, 6, 9})
+v = cfg.Section("").Key("UINT64").InUint64(8, []int64{3, 6, 9})
+v = cfg.Section("").Key("TIME").InTimeFormat(time.RFC3339, time.Now(), []time.Time{time1, time2, time3})
+v = cfg.Section("").Key("TIME").InTime(time.Now(), []time.Time{time1, time2, time3}) // RFC3339
+```
+
+Default value will be presented if value of key is not in candidates you given, and default value does not need be one of candidates.
+
+To validate value in a given range:
+
+```go
+vals = cfg.Section("").Key("FLOAT64").RangeFloat64(0.0, 1.1, 2.2)
+vals = cfg.Section("").Key("INT").RangeInt(0, 10, 20)
+vals = cfg.Section("").Key("INT64").RangeInt64(0, 10, 20)
+vals = cfg.Section("").Key("UINT").RangeUint(0, 3, 9)
+vals = cfg.Section("").Key("UINT64").RangeUint64(0, 3, 9)
+vals = cfg.Section("").Key("TIME").RangeTimeFormat(time.RFC3339, time.Now(), minTime, maxTime)
+vals = cfg.Section("").Key("TIME").RangeTime(time.Now(), minTime, maxTime) // RFC3339
+```
+
+##### Auto-split values into a slice
+
+To use zero value of type for invalid inputs:
+
+```go
+// Input: 1.1, 2.2, 3.3, 4.4 -> [1.1 2.2 3.3 4.4]
+// Input: how, 2.2, are, you -> [0.0 2.2 0.0 0.0]
+vals = cfg.Section("").Key("STRINGS").Strings(",")
+vals = cfg.Section("").Key("FLOAT64S").Float64s(",")
+vals = cfg.Section("").Key("INTS").Ints(",")
+vals = cfg.Section("").Key("INT64S").Int64s(",")
+vals = cfg.Section("").Key("UINTS").Uints(",")
+vals = cfg.Section("").Key("UINT64S").Uint64s(",")
+vals = cfg.Section("").Key("TIMES").Times(",")
+```
+
+To exclude invalid values out of result slice:
+
+```go
+// Input: 1.1, 2.2, 3.3, 4.4 -> [1.1 2.2 3.3 4.4]
+// Input: how, 2.2, are, you -> [2.2]
+vals = cfg.Section("").Key("FLOAT64S").ValidFloat64s(",")
+vals = cfg.Section("").Key("INTS").ValidInts(",")
+vals = cfg.Section("").Key("INT64S").ValidInt64s(",")
+vals = cfg.Section("").Key("UINTS").ValidUints(",")
+vals = cfg.Section("").Key("UINT64S").ValidUint64s(",")
+vals = cfg.Section("").Key("TIMES").ValidTimes(",")
+```
+
+Or to return nothing but error when have invalid inputs:
+
+```go
+// Input: 1.1, 2.2, 3.3, 4.4 -> [1.1 2.2 3.3 4.4]
+// Input: how, 2.2, are, you -> error
+vals = cfg.Section("").Key("FLOAT64S").StrictFloat64s(",")
+vals = cfg.Section("").Key("INTS").StrictInts(",")
+vals = cfg.Section("").Key("INT64S").StrictInt64s(",")
+vals = cfg.Section("").Key("UINTS").StrictUints(",")
+vals = cfg.Section("").Key("UINT64S").StrictUint64s(",")
+vals = cfg.Section("").Key("TIMES").StrictTimes(",")
+```
+
+### Save your configuration
+
+Finally, it's time to save your configuration to somewhere.
+
+A typical way to save configuration is writing it to a file:
+
+```go
+// ...
+err = cfg.SaveTo("my.ini")
+err = cfg.SaveToIndent("my.ini", "\t")
+```
+
+Another way to save is writing to a `io.Writer` interface:
+
+```go
+// ...
+cfg.WriteTo(writer)
+cfg.WriteToIndent(writer, "\t")
+```
+
+By default, spaces are used to align "=" sign between key and values, to disable that:
+
+```go
+ini.PrettyFormat = false
+``` 
+
+## Advanced Usage
+
+### Recursive Values
+
+For all value of keys, there is a special syntax `%(<name>)s`, where `<name>` is the key name in same section or default section, and `%(<name>)s` will be replaced by corresponding value(empty string if key not found). You can use this syntax at most 99 level of recursions.
+
+```ini
+NAME = ini
+
+[author]
+NAME = Unknwon
+GITHUB = https://github.com/%(NAME)s
+
+[package]
+FULL_NAME = github.com/go-ini/%(NAME)s
+```
+
+```go
+cfg.Section("author").Key("GITHUB").String()		// https://github.com/Unknwon
+cfg.Section("package").Key("FULL_NAME").String()	// github.com/go-ini/ini
+```
+
+### Parent-child Sections
+
+You can use `.` in section name to indicate parent-child relationship between two or more sections. If the key not found in the child section, library will try again on its parent section until there is no parent section.
+
+```ini
+NAME = ini
+VERSION = v1
+IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
+
+[package]
+CLONE_URL = https://%(IMPORT_PATH)s
+
+[package.sub]
+```
+
+```go
+cfg.Section("package.sub").Key("CLONE_URL").String()	// https://gopkg.in/ini.v1
+```
+
+#### Retrieve parent keys available to a child section
+
+```go
+cfg.Section("package.sub").ParentKeys() // ["CLONE_URL"]
+```
+
+### Unparseable Sections
+
+Sometimes, you have sections that do not contain key-value pairs but raw content, to handle such case, you can use `LoadOptions.UnparsableSections`:
+
+```go
+cfg, err := LoadSources(LoadOptions{UnparseableSections: []string{"COMMENTS"}}, `[COMMENTS]
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>`))
+
+body := cfg.Section("COMMENTS").Body()
+
+/* --- start ---
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>
+------  end  --- */
+```
+
+### Auto-increment Key Names
+
+If key name is `-` in data source, then it would be seen as special syntax for auto-increment key name start from 1, and every section is independent on counter.
+
+```ini
+[features]
+-: Support read/write comments of keys and sections
+-: Support auto-increment of key names
+-: Support load multiple files to overwrite key values
+```
+
+```go
+cfg.Section("features").KeyStrings()	// []{"#1", "#2", "#3"}
+```
+
+### Map To Struct
+
+Want more objective way to play with INI? Cool.
+
+```ini
+Name = Unknwon
+age = 21
+Male = true
+Born = 1993-01-01T20:17:05Z
+
+[Note]
+Content = Hi is a good man!
+Cities = HangZhou, Boston
+```
+
+```go
+type Note struct {
+	Content string
+	Cities  []string
+}
+
+type Person struct {
+	Name string
+	Age  int `ini:"age"`
+	Male bool
+	Born time.Time
+	Note
+	Created time.Time `ini:"-"`
+}
+
+func main() {
+	cfg, err := ini.Load("path/to/ini")
+	// ...
+	p := new(Person)
+	err = cfg.MapTo(p)
+	// ...
+
+	// Things can be simpler.
+	err = ini.MapTo(p, "path/to/ini")
+	// ...
+
+	// Just map a section? Fine.
+	n := new(Note)
+	err = cfg.Section("Note").MapTo(n)
+	// ...
+}
+```
+
+Can I have default value for field? Absolutely.
+
+Assign it before you map to struct. It will keep the value as it is if the key is not presented or got wrong type.
+
+```go
+// ...
+p := &Person{
+	Name: "Joe",
+}
+// ...
+```
+
+It's really cool, but what's the point if you can't give me my file back from struct?
+
+### Reflect From Struct
+
+Why not?
+
+```go
+type Embeded struct {
+	Dates  []time.Time `delim:"|"`
+	Places []string    `ini:"places,omitempty"`
+	None   []int       `ini:",omitempty"`
+}
+
+type Author struct {
+	Name      string `ini:"NAME"`
+	Male      bool
+	Age       int
+	GPA       float64
+	NeverMind string `ini:"-"`
+	*Embeded
+}
+
+func main() {
+	a := &Author{"Unknwon", true, 21, 2.8, "",
+		&Embeded{
+			[]time.Time{time.Now(), time.Now()},
+			[]string{"HangZhou", "Boston"},
+			[]int{},
+		}}
+	cfg := ini.Empty()
+	err = ini.ReflectFrom(cfg, a)
+	// ...
+}
+```
+
+So, what do I get?
+
+```ini
+NAME = Unknwon
+Male = true
+Age = 21
+GPA = 2.8
+
+[Embeded]
+Dates = 2015-08-07T22:14:22+08:00|2015-08-07T22:14:22+08:00
+places = HangZhou,Boston
+```
+
+#### Name Mapper
+
+To save your time and make your code cleaner, this library supports [`NameMapper`](https://gowalker.org/gopkg.in/ini.v1#NameMapper) between struct field and actual section and key name.
+
+There are 2 built-in name mappers:
+
+- `AllCapsUnderscore`: it converts to format `ALL_CAPS_UNDERSCORE` then match section or key.
+- `TitleUnderscore`: it converts to format `title_underscore` then match section or key.
+
+To use them:
+
+```go
+type Info struct {
+	PackageName string
+}
+
+func main() {
+	err = ini.MapToWithMapper(&Info{}, ini.TitleUnderscore, []byte("package_name=ini"))
+	// ...
+
+	cfg, err := ini.Load([]byte("PACKAGE_NAME=ini"))
+	// ...
+	info := new(Info)
+	cfg.NameMapper = ini.AllCapsUnderscore
+	err = cfg.MapTo(info)
+	// ...
+}
+```
+
+Same rules of name mapper apply to `ini.ReflectFromWithMapper` function.
+
+#### Value Mapper
+
+To expand values (e.g. from environment variables), you can use the `ValueMapper` to transform values:
+
+```go
+type Env struct {
+	Foo string `ini:"foo"`
+}
+
+func main() {
+	cfg, err := ini.Load([]byte("[env]\nfoo = ${MY_VAR}\n")
+	cfg.ValueMapper = os.ExpandEnv
+	// ...
+	env := &Env{}
+	err = cfg.Section("env").MapTo(env)
+}
+```
+
+This would set the value of `env.Foo` to the value of the environment variable `MY_VAR`.
+
+#### Other Notes On Map/Reflect
+
+Any embedded struct is treated as a section by default, and there is no automatic parent-child relations in map/reflect feature:
+
+```go
+type Child struct {
+	Age string
+}
+
+type Parent struct {
+	Name string
+	Child
+}
+
+type Config struct {
+	City string
+	Parent
+}
+```
+
+Example configuration:
+
+```ini
+City = Boston
+
+[Parent]
+Name = Unknwon
+
+[Child]
+Age = 21
+```
+
+What if, yes, I'm paranoid, I want embedded struct to be in the same section. Well, all roads lead to Rome.
+
+```go
+type Child struct {
+	Age string
+}
+
+type Parent struct {
+	Name string
+	Child `ini:"Parent"`
+}
+
+type Config struct {
+	City string
+	Parent
+}
+```
+
+Example configuration:
+
+```ini
+City = Boston
+
+[Parent]
+Name = Unknwon
+Age = 21
+```
+
+## Getting Help
+
+- [API Documentation](https://gowalker.org/gopkg.in/ini.v1)
+- [File An Issue](https://github.com/go-ini/ini/issues/new)
+
+## FAQs
+
+### What does `BlockMode` field do?
+
+By default, library lets you read and write values so we need a locker to make sure your data is safe. But in cases that you are very sure about only reading data through the library, you can set `cfg.BlockMode = false` to speed up read operations about **50-70%** faster.
+
+### Why another INI library?
+
+Many people are using my another INI library [goconfig](https://github.com/Unknwon/goconfig), so the reason for this one is I would like to make more Go style code. Also when you set `cfg.BlockMode = false`, this one is about **10-30%** faster.
+
+To make those changes I have to confirm API broken, so it's safer to keep it in another place and start using `gopkg.in` to version my package at this time.(PS: shorter import path)
+
+## License
+
+This project is under Apache v2 License. See the [LICENSE](LICENSE) file for the full license text.

vendor/github.com/go-ini/ini/README_ZH.md

@@ -0,0 +1,727 @@
+本包提供了 Go 语言中读写 INI 文件的功能。
+
+## 功能特性
+
+- 支持覆盖加载多个数据源（`[]byte`、文件和 `io.ReadCloser`）
+- 支持递归读取键值
+- 支持读取父子分区
+- 支持读取自增键名
+- 支持读取多行的键值
+- 支持大量辅助方法
+- 支持在读取时直接转换为 Go 语言类型
+- 支持读取和 **写入** 分区和键的注释
+- 轻松操作分区、键值和注释
+- 在保存文件时分区和键值会保持原有的顺序
+
+## 下载安装
+
+使用一个特定版本：
+
+    go get gopkg.in/ini.v1
+
+使用最新版：
+
+	go get github.com/go-ini/ini
+
+如需更新请添加 `-u` 选项。
+
+### 测试安装
+
+如果您想要在自己的机器上运行测试，请使用 `-t` 标记：
+
+	go get -t gopkg.in/ini.v1
+
+如需更新请添加 `-u` 选项。
+
+## 开始使用
+
+### 从数据源加载
+
+一个 **数据源** 可以是 `[]byte` 类型的原始数据，`string` 类型的文件路径或 `io.ReadCloser`。您可以加载 **任意多个** 数据源。如果您传递其它类型的数据源，则会直接返回错误。
+
+```go
+cfg, err := ini.Load([]byte("raw data"), "filename", ioutil.NopCloser(bytes.NewReader([]byte("some other data"))))
+```
+
+或者从一个空白的文件开始：
+
+```go
+cfg := ini.Empty()
+```
+
+当您在一开始无法决定需要加载哪些数据源时，仍可以使用 **Append()** 在需要的时候加载它们。
+
+```go
+err := cfg.Append("other file", []byte("other raw data"))
+```
+
+当您想要加载一系列文件，但是不能够确定其中哪些文件是不存在的，可以通过调用函数 `LooseLoad` 来忽略它们（`Load` 会因为文件不存在而返回错误）：
+
+```go
+cfg, err := ini.LooseLoad("filename", "filename_404")
+```
+
+更牛逼的是，当那些之前不存在的文件在重新调用 `Reload` 方法的时候突然出现了，那么它们会被正常加载。
+
+#### 忽略键名的大小写
+
+有时候分区和键的名称大小写混合非常烦人，这个时候就可以通过 `InsensitiveLoad` 将所有分区和键名在读取里强制转换为小写：
+
+```go
+cfg, err := ini.InsensitiveLoad("filename")
+//...
+
+// sec1 和 sec2 指向同一个分区对象
+sec1, err := cfg.GetSection("Section")
+sec2, err := cfg.GetSection("SecTIOn")
+
+// key1 和 key2 指向同一个键对象
+key1, err := sec1.GetKey("Key")
+key2, err := sec2.GetKey("KeY")
+```
+
+#### 类似 MySQL 配置中的布尔值键
+
+MySQL 的配置文件中会出现没有具体值的布尔类型的键：
+
+```ini
+[mysqld]
+...
+skip-host-cache
+skip-name-resolve
+```
+
+默认情况下这被认为是缺失值而无法完成解析，但可以通过高级的加载选项对它们进行处理：
+
+```go
+cfg, err := LoadSources(LoadOptions{AllowBooleanKeys: true}, "my.cnf"))
+```
+
+这些键的值永远为 `true`，且在保存到文件时也只会输出键名。
+
+如果您想要通过程序来生成此类键，则可以使用 `NewBooleanKey`：
+
+```go
+key, err := sec.NewBooleanKey("skip-host-cache")
+```
+
+#### 关于注释
+
+下述几种情况的内容将被视为注释：
+
+1. 所有以 `#` 或 `;` 开头的行
+2. 所有在 `#` 或 `;` 之后的内容
+3. 分区标签后的文字 (即 `[分区名]` 之后的内容)
+
+如果你希望使用包含 `#` 或 `;` 的值，请使用 ``` ` ``` 或 ``` """ ``` 进行包覆。
+
+### 操作分区（Section）
+
+获取指定分区：
+
+```go
+section, err := cfg.GetSection("section name")
+```
+
+如果您想要获取默认分区，则可以用空字符串代替分区名：
+
+```go
+section, err := cfg.GetSection("")
+```
+
+当您非常确定某个分区是存在的，可以使用以下简便方法：
+
+```go
+section := cfg.Section("section name")
+```
+
+如果不小心判断错了，要获取的分区其实是不存在的，那会发生什么呢？没事的，它会自动创建并返回一个对应的分区对象给您。
+
+创建一个分区：
+
+```go
+err := cfg.NewSection("new section")
+```
+
+获取所有分区对象或名称：
+
+```go
+sections := cfg.Sections()
+names := cfg.SectionStrings()
+```
+
+### 操作键（Key）
+
+获取某个分区下的键：
+
+```go
+key, err := cfg.Section("").GetKey("key name")
+```
+
+和分区一样，您也可以直接获取键而忽略错误处理：
+
+```go
+key := cfg.Section("").Key("key name")
+```
+
+判断某个键是否存在：
+
+```go
+yes := cfg.Section("").HasKey("key name")
+```
+
+创建一个新的键：
+
+```go
+err := cfg.Section("").NewKey("name", "value")
+```
+
+获取分区下的所有键或键名：
+
+```go
+keys := cfg.Section("").Keys()
+names := cfg.Section("").KeyStrings()
+```
+
+获取分区下的所有键值对的克隆：
+
+```go
+hash := cfg.Section("").KeysHash()
+```
+
+### 操作键值（Value）
+
+获取一个类型为字符串（string）的值：
+
+```go
+val := cfg.Section("").Key("key name").String()
+```
+
+获取值的同时通过自定义函数进行处理验证：
+
+```go
+val := cfg.Section("").Key("key name").Validate(func(in string) string {
+	if len(in) == 0 {
+		return "default"
+	}
+	return in
+})
+```
+
+如果您不需要任何对值的自动转变功能（例如递归读取），可以直接获取原值（这种方式性能最佳）：
+
+```go
+val := cfg.Section("").Key("key name").Value()
+```
+
+判断某个原值是否存在：
+
+```go
+yes := cfg.Section("").HasValue("test value")
+```
+
+获取其它类型的值：
+
+```go
+// 布尔值的规则：
+// true 当值为：1, t, T, TRUE, true, True, YES, yes, Yes, y, ON, on, On
+// false 当值为：0, f, F, FALSE, false, False, NO, no, No, n, OFF, off, Off
+v, err = cfg.Section("").Key("BOOL").Bool()
+v, err = cfg.Section("").Key("FLOAT64").Float64()
+v, err = cfg.Section("").Key("INT").Int()
+v, err = cfg.Section("").Key("INT64").Int64()
+v, err = cfg.Section("").Key("UINT").Uint()
+v, err = cfg.Section("").Key("UINT64").Uint64()
+v, err = cfg.Section("").Key("TIME").TimeFormat(time.RFC3339)
+v, err = cfg.Section("").Key("TIME").Time() // RFC3339
+
+v = cfg.Section("").Key("BOOL").MustBool()
+v = cfg.Section("").Key("FLOAT64").MustFloat64()
+v = cfg.Section("").Key("INT").MustInt()
+v = cfg.Section("").Key("INT64").MustInt64()
+v = cfg.Section("").Key("UINT").MustUint()
+v = cfg.Section("").Key("UINT64").MustUint64()
+v = cfg.Section("").Key("TIME").MustTimeFormat(time.RFC3339)
+v = cfg.Section("").Key("TIME").MustTime() // RFC3339
+
+// 由 Must 开头的方法名允许接收一个相同类型的参数来作为默认值，
+// 当键不存在或者转换失败时，则会直接返回该默认值。
+// 但是，MustString 方法必须传递一个默认值。
+
+v = cfg.Seciont("").Key("String").MustString("default")
+v = cfg.Section("").Key("BOOL").MustBool(true)
+v = cfg.Section("").Key("FLOAT64").MustFloat64(1.25)
+v = cfg.Section("").Key("INT").MustInt(10)
+v = cfg.Section("").Key("INT64").MustInt64(99)
+v = cfg.Section("").Key("UINT").MustUint(3)
+v = cfg.Section("").Key("UINT64").MustUint64(6)
+v = cfg.Section("").Key("TIME").MustTimeFormat(time.RFC3339, time.Now())
+v = cfg.Section("").Key("TIME").MustTime(time.Now()) // RFC3339
+```
+
+如果我的值有好多行怎么办？
+
+```ini
+[advance]
+ADDRESS = """404 road,
+NotFound, State, 5000
+Earth"""
+```
+
+嗯哼？小 case！
+
+```go
+cfg.Section("advance").Key("ADDRESS").String()
+
+/* --- start ---
+404 road,
+NotFound, State, 5000
+Earth
+------  end  --- */
+```
+
+赞爆了！那要是我属于一行的内容写不下想要写到第二行怎么办？
+
+```ini
+[advance]
+two_lines = how about \
+	continuation lines?
+lots_of_lines = 1 \
+	2 \
+	3 \
+	4
+```
+
+简直是小菜一碟！
+
+```go
+cfg.Section("advance").Key("two_lines").String() // how about continuation lines?
+cfg.Section("advance").Key("lots_of_lines").String() // 1 2 3 4
+```
+
+可是我有时候觉得两行连在一起特别没劲，怎么才能不自动连接两行呢？
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{
+	IgnoreContinuation: true,
+}, "filename")
+```
+
+哇靠给力啊！
+
+需要注意的是，值两侧的单引号会被自动剔除：
+
+```ini
+foo = "some value" // foo: some value
+bar = 'some value' // bar: some value
+```
+
+这就是全部了？哈哈，当然不是。
+
+#### 操作键值的辅助方法
+
+获取键值时设定候选值：
+
+```go
+v = cfg.Section("").Key("STRING").In("default", []string{"str", "arr", "types"})
+v = cfg.Section("").Key("FLOAT64").InFloat64(1.1, []float64{1.25, 2.5, 3.75})
+v = cfg.Section("").Key("INT").InInt(5, []int{10, 20, 30})
+v = cfg.Section("").Key("INT64").InInt64(10, []int64{10, 20, 30})
+v = cfg.Section("").Key("UINT").InUint(4, []int{3, 6, 9})
+v = cfg.Section("").Key("UINT64").InUint64(8, []int64{3, 6, 9})
+v = cfg.Section("").Key("TIME").InTimeFormat(time.RFC3339, time.Now(), []time.Time{time1, time2, time3})
+v = cfg.Section("").Key("TIME").InTime(time.Now(), []time.Time{time1, time2, time3}) // RFC3339
+```
+
+如果获取到的值不是候选值的任意一个，则会返回默认值，而默认值不需要是候选值中的一员。
+
+验证获取的值是否在指定范围内：
+
+```go
+vals = cfg.Section("").Key("FLOAT64").RangeFloat64(0.0, 1.1, 2.2)
+vals = cfg.Section("").Key("INT").RangeInt(0, 10, 20)
+vals = cfg.Section("").Key("INT64").RangeInt64(0, 10, 20)
+vals = cfg.Section("").Key("UINT").RangeUint(0, 3, 9)
+vals = cfg.Section("").Key("UINT64").RangeUint64(0, 3, 9)
+vals = cfg.Section("").Key("TIME").RangeTimeFormat(time.RFC3339, time.Now(), minTime, maxTime)
+vals = cfg.Section("").Key("TIME").RangeTime(time.Now(), minTime, maxTime) // RFC3339
+```
+
+##### 自动分割键值到切片（slice）
+
+当存在无效输入时，使用零值代替：
+
+```go
+// Input: 1.1, 2.2, 3.3, 4.4 -> [1.1 2.2 3.3 4.4]
+// Input: how, 2.2, are, you -> [0.0 2.2 0.0 0.0]
+vals = cfg.Section("").Key("STRINGS").Strings(",")
+vals = cfg.Section("").Key("FLOAT64S").Float64s(",")
+vals = cfg.Section("").Key("INTS").Ints(",")
+vals = cfg.Section("").Key("INT64S").Int64s(",")
+vals = cfg.Section("").Key("UINTS").Uints(",")
+vals = cfg.Section("").Key("UINT64S").Uint64s(",")
+vals = cfg.Section("").Key("TIMES").Times(",")
+```
+
+从结果切片中剔除无效输入：
+
+```go
+// Input: 1.1, 2.2, 3.3, 4.4 -> [1.1 2.2 3.3 4.4]
+// Input: how, 2.2, are, you -> [2.2]
+vals = cfg.Section("").Key("FLOAT64S").ValidFloat64s(",")
+vals = cfg.Section("").Key("INTS").ValidInts(",")
+vals = cfg.Section("").Key("INT64S").ValidInt64s(",")
+vals = cfg.Section("").Key("UINTS").ValidUints(",")
+vals = cfg.Section("").Key("UINT64S").ValidUint64s(",")
+vals = cfg.Section("").Key("TIMES").ValidTimes(",")
+```
+
+当存在无效输入时，直接返回错误：
+
+```go
+// Input: 1.1, 2.2, 3.3, 4.4 -> [1.1 2.2 3.3 4.4]
+// Input: how, 2.2, are, you -> error
+vals = cfg.Section("").Key("FLOAT64S").StrictFloat64s(",")
+vals = cfg.Section("").Key("INTS").StrictInts(",")
+vals = cfg.Section("").Key("INT64S").StrictInt64s(",")
+vals = cfg.Section("").Key("UINTS").StrictUints(",")
+vals = cfg.Section("").Key("UINT64S").StrictUint64s(",")
+vals = cfg.Section("").Key("TIMES").StrictTimes(",")
+```
+
+### 保存配置
+
+终于到了这个时刻，是时候保存一下配置了。
+
+比较原始的做法是输出配置到某个文件：
+
+```go
+// ...
+err = cfg.SaveTo("my.ini")
+err = cfg.SaveToIndent("my.ini", "\t")
+```
+
+另一个比较高级的做法是写入到任何实现 `io.Writer` 接口的对象中：
+
+```go
+// ...
+cfg.WriteTo(writer)
+cfg.WriteToIndent(writer, "\t")
+```
+
+默认情况下，空格将被用于对齐键值之间的等号以美化输出结果，以下代码可以禁用该功能：
+
+```go
+ini.PrettyFormat = false
+``` 
+
+## 高级用法
+
+### 递归读取键值
+
+在获取所有键值的过程中，特殊语法 `%(<name>)s` 会被应用，其中 `<name>` 可以是相同分区或者默认分区下的键名。字符串 `%(<name>)s` 会被相应的键值所替代，如果指定的键不存在，则会用空字符串替代。您可以最多使用 99 层的递归嵌套。
+
+```ini
+NAME = ini
+
+[author]
+NAME = Unknwon
+GITHUB = https://github.com/%(NAME)s
+
+[package]
+FULL_NAME = github.com/go-ini/%(NAME)s
+```
+
+```go
+cfg.Section("author").Key("GITHUB").String()		// https://github.com/Unknwon
+cfg.Section("package").Key("FULL_NAME").String()	// github.com/go-ini/ini
+```
+
+### 读取父子分区
+
+您可以在分区名称中使用 `.` 来表示两个或多个分区之间的父子关系。如果某个键在子分区中不存在，则会去它的父分区中再次寻找，直到没有父分区为止。
+
+```ini
+NAME = ini
+VERSION = v1
+IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
+
+[package]
+CLONE_URL = https://%(IMPORT_PATH)s
+
+[package.sub]
+```
+
+```go
+cfg.Section("package.sub").Key("CLONE_URL").String()	// https://gopkg.in/ini.v1
+```
+
+#### 获取上级父分区下的所有键名
+
+```go
+cfg.Section("package.sub").ParentKeys() // ["CLONE_URL"]
+```
+
+### 无法解析的分区
+
+如果遇到一些比较特殊的分区，它们不包含常见的键值对，而是没有固定格式的纯文本，则可以使用 `LoadOptions.UnparsableSections` 进行处理：
+
+```go
+cfg, err := LoadSources(LoadOptions{UnparseableSections: []string{"COMMENTS"}}, `[COMMENTS]
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>`))
+
+body := cfg.Section("COMMENTS").Body()
+
+/* --- start ---
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>
+------  end  --- */
+```
+
+### 读取自增键名
+
+如果数据源中的键名为 `-`，则认为该键使用了自增键名的特殊语法。计数器从 1 开始，并且分区之间是相互独立的。
+
+```ini
+[features]
+-: Support read/write comments of keys and sections
+-: Support auto-increment of key names
+-: Support load multiple files to overwrite key values
+```
+
+```go
+cfg.Section("features").KeyStrings()	// []{"#1", "#2", "#3"}
+```
+
+### 映射到结构
+
+想要使用更加面向对象的方式玩转 INI 吗？好主意。
+
+```ini
+Name = Unknwon
+age = 21
+Male = true
+Born = 1993-01-01T20:17:05Z
+
+[Note]
+Content = Hi is a good man!
+Cities = HangZhou, Boston
+```
+
+```go
+type Note struct {
+	Content string
+	Cities  []string
+}
+
+type Person struct {
+	Name string
+	Age  int `ini:"age"`
+	Male bool
+	Born time.Time
+	Note
+	Created time.Time `ini:"-"`
+}
+
+func main() {
+	cfg, err := ini.Load("path/to/ini")
+	// ...
+	p := new(Person)
+	err = cfg.MapTo(p)
+	// ...
+
+	// 一切竟可以如此的简单。
+	err = ini.MapTo(p, "path/to/ini")
+	// ...
+
+	// 嗯哼？只需要映射一个分区吗？
+	n := new(Note)
+	err = cfg.Section("Note").MapTo(n)
+	// ...
+}
+```
+
+结构的字段怎么设置默认值呢？很简单，只要在映射之前对指定字段进行赋值就可以了。如果键未找到或者类型错误，该值不会发生改变。
+
+```go
+// ...
+p := &Person{
+	Name: "Joe",
+}
+// ...
+```
+
+这样玩 INI 真的好酷啊！然而，如果不能还给我原来的配置文件，有什么卵用？
+
+### 从结构反射
+
+可是，我有说不能吗？
+
+```go
+type Embeded struct {
+	Dates  []time.Time `delim:"|"`
+	Places []string    `ini:"places,omitempty"`
+	None   []int       `ini:",omitempty"`
+}
+
+type Author struct {
+	Name      string `ini:"NAME"`
+	Male      bool
+	Age       int
+	GPA       float64
+	NeverMind string `ini:"-"`
+	*Embeded
+}
+
+func main() {
+	a := &Author{"Unknwon", true, 21, 2.8, "",
+		&Embeded{
+			[]time.Time{time.Now(), time.Now()},
+			[]string{"HangZhou", "Boston"},
+			[]int{},
+		}}
+	cfg := ini.Empty()
+	err = ini.ReflectFrom(cfg, a)
+	// ...
+}
+```
+
+瞧瞧，奇迹发生了。
+
+```ini
+NAME = Unknwon
+Male = true
+Age = 21
+GPA = 2.8
+
+[Embeded]
+Dates = 2015-08-07T22:14:22+08:00|2015-08-07T22:14:22+08:00
+places = HangZhou,Boston
+```
+
+#### 名称映射器（Name Mapper）
+
+为了节省您的时间并简化代码，本库支持类型为 [`NameMapper`](https://gowalker.org/gopkg.in/ini.v1#NameMapper) 的名称映射器，该映射器负责结构字段名与分区名和键名之间的映射。
+
+目前有 2 款内置的映射器：
+
+- `AllCapsUnderscore`：该映射器将字段名转换至格式 `ALL_CAPS_UNDERSCORE` 后再去匹配分区名和键名。
+- `TitleUnderscore`：该映射器将字段名转换至格式 `title_underscore` 后再去匹配分区名和键名。
+
+使用方法：
+
+```go
+type Info struct{
+	PackageName string
+}
+
+func main() {
+	err = ini.MapToWithMapper(&Info{}, ini.TitleUnderscore, []byte("package_name=ini"))
+	// ...
+
+	cfg, err := ini.Load([]byte("PACKAGE_NAME=ini"))
+	// ...
+	info := new(Info)
+	cfg.NameMapper = ini.AllCapsUnderscore
+	err = cfg.MapTo(info)
+	// ...
+}
+```
+
+使用函数 `ini.ReflectFromWithMapper` 时也可应用相同的规则。
+
+#### 值映射器（Value Mapper）
+
+值映射器允许使用一个自定义函数自动展开值的具体内容，例如：运行时获取环境变量：
+
+```go
+type Env struct {
+	Foo string `ini:"foo"`
+}
+
+func main() {
+	cfg, err := ini.Load([]byte("[env]\nfoo = ${MY_VAR}\n")
+	cfg.ValueMapper = os.ExpandEnv
+	// ...
+	env := &Env{}
+	err = cfg.Section("env").MapTo(env)
+}
+```
+
+本例中，`env.Foo` 将会是运行时所获取到环境变量 `MY_VAR` 的值。
+
+#### 映射/反射的其它说明
+
+任何嵌入的结构都会被默认认作一个不同的分区，并且不会自动产生所谓的父子分区关联：
+
+```go
+type Child struct {
+	Age string
+}
+
+type Parent struct {
+	Name string
+	Child
+}
+
+type Config struct {
+	City string
+	Parent
+}
+```
+
+示例配置文件：
+
+```ini
+City = Boston
+
+[Parent]
+Name = Unknwon
+
+[Child]
+Age = 21
+```
+
+很好，但是，我就是要嵌入结构也在同一个分区。好吧，你爹是李刚！
+
+```go
+type Child struct {
+	Age string
+}
+
+type Parent struct {
+	Name string
+	Child `ini:"Parent"`
+}
+
+type Config struct {
+	City string
+	Parent
+}
+```
+
+示例配置文件：
+
+```ini
+City = Boston
+
+[Parent]
+Name = Unknwon
+Age = 21
+```
+
+## 获取帮助
+
+- [API 文档](https://gowalker.org/gopkg.in/ini.v1)
+- [创建工单](https://github.com/go-ini/ini/issues/new)
+
+## 常见问题
+
+### 字段 `BlockMode` 是什么？
+
+默认情况下，本库会在您进行读写操作时采用锁机制来确保数据时间。但在某些情况下，您非常确定只进行读操作。此时，您可以通过设置 `cfg.BlockMode = false` 来将读操作提升大约 **50-70%** 的性能。
+
+### 为什么要写另一个 INI 解析库？
+
+许多人都在使用我的 [goconfig](https://github.com/Unknwon/goconfig) 来完成对 INI 文件的操作，但我希望使用更加 Go 风格的代码。并且当您设置 `cfg.BlockMode = false` 时，会有大约 **10-30%** 的性能提升。
+
+为了做出这些改变，我必须对 API 进行破坏，所以新开一个仓库是最安全的做法。除此之外，本库直接使用 `gopkg.in` 来进行版本化发布。（其实真相是导入路径更短了）

vendor/github.com/go-ini/ini/error.go

@@ -0,0 +1,32 @@
+// Copyright 2016 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"fmt"
+)
+
+type ErrDelimiterNotFound struct {
+	Line string
+}
+
+func IsErrDelimiterNotFound(err error) bool {
+	_, ok := err.(ErrDelimiterNotFound)
+	return ok
+}
+
+func (err ErrDelimiterNotFound) Error() string {
+	return fmt.Sprintf("key-value delimiter not found: %s", err.Line)
+}

vendor/github.com/go-ini/ini/ini.go

@@ -0,0 +1,556 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+// Package ini provides INI file read and write functionality in Go.
+package ini
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"regexp"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+const (
+	// Name for default section. You can use this constant or the string literal.
+	// In most of cases, an empty string is all you need to access the section.
+	DEFAULT_SECTION = "DEFAULT"
+
+	// Maximum allowed depth when recursively substituing variable names.
+	_DEPTH_VALUES = 99
+	_VERSION      = "1.27.2"
+)
+
+// Version returns current package version literal.
+func Version() string {
+	return _VERSION
+}
+
+var (
+	// Delimiter to determine or compose a new line.
+	// This variable will be changed to "\r\n" automatically on Windows
+	// at package init time.
+	LineBreak = "\n"
+
+	// Variable regexp pattern: %(variable)s
+	varPattern = regexp.MustCompile(`%\(([^\)]+)\)s`)
+
+	// Indicate whether to align "=" sign with spaces to produce pretty output
+	// or reduce all possible spaces for compact format.
+	PrettyFormat = true
+
+	// Explicitly write DEFAULT section header
+	DefaultHeader = false
+)
+
+func init() {
+	if runtime.GOOS == "windows" {
+		LineBreak = "\r\n"
+	}
+}
+
+func inSlice(str string, s []string) bool {
+	for _, v := range s {
+		if str == v {
+			return true
+		}
+	}
+	return false
+}
+
+// dataSource is an interface that returns object which can be read and closed.
+type dataSource interface {
+	ReadCloser() (io.ReadCloser, error)
+}
+
+// sourceFile represents an object that contains content on the local file system.
+type sourceFile struct {
+	name string
+}
+
+func (s sourceFile) ReadCloser() (_ io.ReadCloser, err error) {
+	return os.Open(s.name)
+}
+
+type bytesReadCloser struct {
+	reader io.Reader
+}
+
+func (rc *bytesReadCloser) Read(p []byte) (n int, err error) {
+	return rc.reader.Read(p)
+}
+
+func (rc *bytesReadCloser) Close() error {
+	return nil
+}
+
+// sourceData represents an object that contains content in memory.
+type sourceData struct {
+	data []byte
+}
+
+func (s *sourceData) ReadCloser() (io.ReadCloser, error) {
+	return ioutil.NopCloser(bytes.NewReader(s.data)), nil
+}
+
+// sourceReadCloser represents an input stream with Close method.
+type sourceReadCloser struct {
+	reader io.ReadCloser
+}
+
+func (s *sourceReadCloser) ReadCloser() (io.ReadCloser, error) {
+	return s.reader, nil
+}
+
+// File represents a combination of a or more INI file(s) in memory.
+type File struct {
+	// Should make things safe, but sometimes doesn't matter.
+	BlockMode bool
+	// Make sure data is safe in multiple goroutines.
+	lock sync.RWMutex
+
+	// Allow combination of multiple data sources.
+	dataSources []dataSource
+	// Actual data is stored here.
+	sections map[string]*Section
+
+	// To keep data in order.
+	sectionList []string
+
+	options LoadOptions
+
+	NameMapper
+	ValueMapper
+}
+
+// newFile initializes File object with given data sources.
+func newFile(dataSources []dataSource, opts LoadOptions) *File {
+	return &File{
+		BlockMode:   true,
+		dataSources: dataSources,
+		sections:    make(map[string]*Section),
+		sectionList: make([]string, 0, 10),
+		options:     opts,
+	}
+}
+
+func parseDataSource(source interface{}) (dataSource, error) {
+	switch s := source.(type) {
+	case string:
+		return sourceFile{s}, nil
+	case []byte:
+		return &sourceData{s}, nil
+	case io.ReadCloser:
+		return &sourceReadCloser{s}, nil
+	default:
+		return nil, fmt.Errorf("error parsing data source: unknown type '%s'", s)
+	}
+}
+
+type LoadOptions struct {
+	// Loose indicates whether the parser should ignore nonexistent files or return error.
+	Loose bool
+	// Insensitive indicates whether the parser forces all section and key names to lowercase.
+	Insensitive bool
+	// IgnoreContinuation indicates whether to ignore continuation lines while parsing.
+	IgnoreContinuation bool
+	// IgnoreInlineComment indicates whether to ignore comments at the end of value and treat it as part of value.
+	IgnoreInlineComment bool
+	// AllowBooleanKeys indicates whether to allow boolean type keys or treat as value is missing.
+	// This type of keys are mostly used in my.cnf.
+	AllowBooleanKeys bool
+	// AllowShadows indicates whether to keep track of keys with same name under same section.
+	AllowShadows bool
+	// Some INI formats allow group blocks that store a block of raw content that doesn't otherwise
+	// conform to key/value pairs. Specify the names of those blocks here.
+	UnparseableSections []string
+}
+
+func LoadSources(opts LoadOptions, source interface{}, others ...interface{}) (_ *File, err error) {
+	sources := make([]dataSource, len(others)+1)
+	sources[0], err = parseDataSource(source)
+	if err != nil {
+		return nil, err
+	}
+	for i := range others {
+		sources[i+1], err = parseDataSource(others[i])
+		if err != nil {
+			return nil, err
+		}
+	}
+	f := newFile(sources, opts)
+	if err = f.Reload(); err != nil {
+		return nil, err
+	}
+	return f, nil
+}
+
+// Load loads and parses from INI data sources.
+// Arguments can be mixed of file name with string type, or raw data in []byte.
+// It will return error if list contains nonexistent files.
+func Load(source interface{}, others ...interface{}) (*File, error) {
+	return LoadSources(LoadOptions{}, source, others...)
+}
+
+// LooseLoad has exactly same functionality as Load function
+// except it ignores nonexistent files instead of returning error.
+func LooseLoad(source interface{}, others ...interface{}) (*File, error) {
+	return LoadSources(LoadOptions{Loose: true}, source, others...)
+}
+
+// InsensitiveLoad has exactly same functionality as Load function
+// except it forces all section and key names to be lowercased.
+func InsensitiveLoad(source interface{}, others ...interface{}) (*File, error) {
+	return LoadSources(LoadOptions{Insensitive: true}, source, others...)
+}
+
+// InsensitiveLoad has exactly same functionality as Load function
+// except it allows have shadow keys.
+func ShadowLoad(source interface{}, others ...interface{}) (*File, error) {
+	return LoadSources(LoadOptions{AllowShadows: true}, source, others...)
+}
+
+// Empty returns an empty file object.
+func Empty() *File {
+	// Ignore error here, we sure our data is good.
+	f, _ := Load([]byte(""))
+	return f
+}
+
+// NewSection creates a new section.
+func (f *File) NewSection(name string) (*Section, error) {
+	if len(name) == 0 {
+		return nil, errors.New("error creating new section: empty section name")
+	} else if f.options.Insensitive && name != DEFAULT_SECTION {
+		name = strings.ToLower(name)
+	}
+
+	if f.BlockMode {
+		f.lock.Lock()
+		defer f.lock.Unlock()
+	}
+
+	if inSlice(name, f.sectionList) {
+		return f.sections[name], nil
+	}
+
+	f.sectionList = append(f.sectionList, name)
+	f.sections[name] = newSection(f, name)
+	return f.sections[name], nil
+}
+
+// NewRawSection creates a new section with an unparseable body.
+func (f *File) NewRawSection(name, body string) (*Section, error) {
+	section, err := f.NewSection(name)
+	if err != nil {
+		return nil, err
+	}
+
+	section.isRawSection = true
+	section.rawBody = body
+	return section, nil
+}
+
+// NewSections creates a list of sections.
+func (f *File) NewSections(names ...string) (err error) {
+	for _, name := range names {
+		if _, err = f.NewSection(name); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetSection returns section by given name.
+func (f *File) GetSection(name string) (*Section, error) {
+	if len(name) == 0 {
+		name = DEFAULT_SECTION
+	} else if f.options.Insensitive {
+		name = strings.ToLower(name)
+	}
+
+	if f.BlockMode {
+		f.lock.RLock()
+		defer f.lock.RUnlock()
+	}
+
+	sec := f.sections[name]
+	if sec == nil {
+		return nil, fmt.Errorf("section '%s' does not exist", name)
+	}
+	return sec, nil
+}
+
+// Section assumes named section exists and returns a zero-value when not.
+func (f *File) Section(name string) *Section {
+	sec, err := f.GetSection(name)
+	if err != nil {
+		// Note: It's OK here because the only possible error is empty section name,
+		// but if it's empty, this piece of code won't be executed.
+		sec, _ = f.NewSection(name)
+		return sec
+	}
+	return sec
+}
+
+// Section returns list of Section.
+func (f *File) Sections() []*Section {
+	sections := make([]*Section, len(f.sectionList))
+	for i := range f.sectionList {
+		sections[i] = f.Section(f.sectionList[i])
+	}
+	return sections
+}
+
+// ChildSections returns a list of child sections of given section name.
+func (f *File) ChildSections(name string) []*Section {
+	return f.Section(name).ChildSections()
+}
+
+// SectionStrings returns list of section names.
+func (f *File) SectionStrings() []string {
+	list := make([]string, len(f.sectionList))
+	copy(list, f.sectionList)
+	return list
+}
+
+// DeleteSection deletes a section.
+func (f *File) DeleteSection(name string) {
+	if f.BlockMode {
+		f.lock.Lock()
+		defer f.lock.Unlock()
+	}
+
+	if len(name) == 0 {
+		name = DEFAULT_SECTION
+	}
+
+	for i, s := range f.sectionList {
+		if s == name {
+			f.sectionList = append(f.sectionList[:i], f.sectionList[i+1:]...)
+			delete(f.sections, name)
+			return
+		}
+	}
+}
+
+func (f *File) reload(s dataSource) error {
+	r, err := s.ReadCloser()
+	if err != nil {
+		return err
+	}
+	defer r.Close()
+
+	return f.parse(r)
+}
+
+// Reload reloads and parses all data sources.
+func (f *File) Reload() (err error) {
+	for _, s := range f.dataSources {
+		if err = f.reload(s); err != nil {
+			// In loose mode, we create an empty default section for nonexistent files.
+			if os.IsNotExist(err) && f.options.Loose {
+				f.parse(bytes.NewBuffer(nil))
+				continue
+			}
+			return err
+		}
+	}
+	return nil
+}
+
+// Append appends one or more data sources and reloads automatically.
+func (f *File) Append(source interface{}, others ...interface{}) error {
+	ds, err := parseDataSource(source)
+	if err != nil {
+		return err
+	}
+	f.dataSources = append(f.dataSources, ds)
+	for _, s := range others {
+		ds, err = parseDataSource(s)
+		if err != nil {
+			return err
+		}
+		f.dataSources = append(f.dataSources, ds)
+	}
+	return f.Reload()
+}
+
+// WriteToIndent writes content into io.Writer with given indention.
+// If PrettyFormat has been set to be true,
+// it will align "=" sign with spaces under each section.
+func (f *File) WriteToIndent(w io.Writer, indent string) (n int64, err error) {
+	equalSign := "="
+	if PrettyFormat {
+		equalSign = " = "
+	}
+
+	// Use buffer to make sure target is safe until finish encoding.
+	buf := bytes.NewBuffer(nil)
+	for i, sname := range f.sectionList {
+		sec := f.Section(sname)
+		if len(sec.Comment) > 0 {
+			if sec.Comment[0] != '#' && sec.Comment[0] != ';' {
+				sec.Comment = "; " + sec.Comment
+			}
+			if _, err = buf.WriteString(sec.Comment + LineBreak); err != nil {
+				return 0, err
+			}
+		}
+
+		if i > 0 || DefaultHeader {
+			if _, err = buf.WriteString("[" + sname + "]" + LineBreak); err != nil {
+				return 0, err
+			}
+		} else {
+			// Write nothing if default section is empty
+			if len(sec.keyList) == 0 {
+				continue
+			}
+		}
+
+		if sec.isRawSection {
+			if _, err = buf.WriteString(sec.rawBody); err != nil {
+				return 0, err
+			}
+			continue
+		}
+
+		// Count and generate alignment length and buffer spaces using the
+		// longest key. Keys may be modifed if they contain certain characters so
+		// we need to take that into account in our calculation.
+		alignLength := 0
+		if PrettyFormat {
+			for _, kname := range sec.keyList {
+				keyLength := len(kname)
+				// First case will surround key by ` and second by """
+				if strings.ContainsAny(kname, "\"=:") {
+					keyLength += 2
+				} else if strings.Contains(kname, "`") {
+					keyLength += 6
+				}
+
+				if keyLength > alignLength {
+					alignLength = keyLength
+				}
+			}
+		}
+		alignSpaces := bytes.Repeat([]byte(" "), alignLength)
+
+	KEY_LIST:
+		for _, kname := range sec.keyList {
+			key := sec.Key(kname)
+			if len(key.Comment) > 0 {
+				if len(indent) > 0 && sname != DEFAULT_SECTION {
+					buf.WriteString(indent)
+				}
+				if key.Comment[0] != '#' && key.Comment[0] != ';' {
+					key.Comment = "; " + key.Comment
+				}
+				if _, err = buf.WriteString(key.Comment + LineBreak); err != nil {
+					return 0, err
+				}
+			}
+
+			if len(indent) > 0 && sname != DEFAULT_SECTION {
+				buf.WriteString(indent)
+			}
+
+			switch {
+			case key.isAutoIncrement:
+				kname = "-"
+			case strings.ContainsAny(kname, "\"=:"):
+				kname = "`" + kname + "`"
+			case strings.Contains(kname, "`"):
+				kname = `"""` + kname + `"""`
+			}
+
+			for _, val := range key.ValueWithShadows() {
+				if _, err = buf.WriteString(kname); err != nil {
+					return 0, err
+				}
+
+				if key.isBooleanType {
+					if kname != sec.keyList[len(sec.keyList)-1] {
+						buf.WriteString(LineBreak)
+					}
+					continue KEY_LIST
+				}
+
+				// Write out alignment spaces before "=" sign
+				if PrettyFormat {
+					buf.Write(alignSpaces[:alignLength-len(kname)])
+				}
+
+				// In case key value contains "\n", "`", "\"", "#" or ";"
+				if strings.ContainsAny(val, "\n`") {
+					val = `"""` + val + `"""`
+				} else if !f.options.IgnoreInlineComment && strings.ContainsAny(val, "#;") {
+					val = "`" + val + "`"
+				}
+				if _, err = buf.WriteString(equalSign + val + LineBreak); err != nil {
+					return 0, err
+				}
+			}
+		}
+
+		// Put a line between sections
+		if _, err = buf.WriteString(LineBreak); err != nil {
+			return 0, err
+		}
+	}
+
+	return buf.WriteTo(w)
+}
+
+// WriteTo writes file content into io.Writer.
+func (f *File) WriteTo(w io.Writer) (int64, error) {
+	return f.WriteToIndent(w, "")
+}
+
+// SaveToIndent writes content to file system with given value indention.
+func (f *File) SaveToIndent(filename, indent string) error {
+	// Note: Because we are truncating with os.Create,
+	// 	so it's safer to save to a temporary file location and rename afte done.
+	tmpPath := filename + "." + strconv.Itoa(time.Now().Nanosecond()) + ".tmp"
+	defer os.Remove(tmpPath)
+
+	fw, err := os.Create(tmpPath)
+	if err != nil {
+		return err
+	}
+
+	if _, err = f.WriteToIndent(fw, indent); err != nil {
+		fw.Close()
+		return err
+	}
+	fw.Close()
+
+	// Remove old file and rename the new one.
+	os.Remove(filename)
+	return os.Rename(tmpPath, filename)
+}
+
+// SaveTo writes content to file system.
+func (f *File) SaveTo(filename string) error {
+	return f.SaveToIndent(filename, "")
+}

vendor/github.com/go-ini/ini/ini_test.go

@@ -0,0 +1,491 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"bytes"
+	"io/ioutil"
+	"strings"
+	"testing"
+	"time"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func Test_Version(t *testing.T) {
+	Convey("Get version", t, func() {
+		So(Version(), ShouldEqual, _VERSION)
+	})
+}
+
+const _CONF_DATA = `
+; Package name
+NAME        = ini
+; Package version
+VERSION     = v1
+; Package import path
+IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
+
+# Information about package author
+# Bio can be written in multiple lines.
+[author]
+NAME   = Unknwon  ; Succeeding comment
+E-MAIL = fake@localhost
+GITHUB = https://github.com/%(NAME)s
+BIO    = """Gopher.
+Coding addict.
+Good man.
+"""  # Succeeding comment
+
+[package]
+CLONE_URL = https://%(IMPORT_PATH)s
+
+[package.sub]
+UNUSED_KEY = should be deleted
+
+[features]
+-: Support read/write comments of keys and sections
+-: Support auto-increment of key names
+-: Support load multiple files to overwrite key values
+
+[types]
+STRING     = str
+BOOL       = true
+BOOL_FALSE = false
+FLOAT64    = 1.25
+INT        = 10
+TIME       = 2015-01-01T20:17:05Z
+DURATION   = 2h45m
+UINT       = 3
+
+[array]
+STRINGS  = en, zh, de
+FLOAT64S = 1.1, 2.2, 3.3
+INTS     = 1, 2, 3
+UINTS    = 1, 2, 3
+TIMES    = 2015-01-01T20:17:05Z,2015-01-01T20:17:05Z,2015-01-01T20:17:05Z
+
+[note]
+empty_lines = next line is empty\
+
+; Comment before the section
+[comments] ; This is a comment for the section too
+; Comment before key
+key  = "value"
+key2 = "value2" ; This is a comment for key2
+key3 = "one", "two", "three"
+
+[advance]
+value with quotes = "some value"
+value quote2 again = 'some value'
+includes comment sign = ` + "`" + "my#password" + "`" + `
+includes comment sign2 = ` + "`" + "my;password" + "`" + `
+true = 2+3=5
+"1+1=2" = true
+"""6+1=7""" = true
+"""` + "`" + `5+5` + "`" + `""" = 10
+` + "`" + `"6+6"` + "`" + ` = 12
+` + "`" + `7-2=4` + "`" + ` = false
+ADDRESS = ` + "`" + `404 road,
+NotFound, State, 50000` + "`" + `
+
+two_lines = how about \
+	continuation lines?
+lots_of_lines = 1 \
+	2 \
+	3 \
+	4 \
+`
+
+func Test_Load(t *testing.T) {
+	Convey("Load from data sources", t, func() {
+
+		Convey("Load with empty data", func() {
+			So(Empty(), ShouldNotBeNil)
+		})
+
+		Convey("Load with multiple data sources", func() {
+			cfg, err := Load([]byte(_CONF_DATA), "testdata/conf.ini", ioutil.NopCloser(bytes.NewReader([]byte(_CONF_DATA))))
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+
+			f, err := Load([]byte(_CONF_DATA), "testdata/404.ini")
+			So(err, ShouldNotBeNil)
+			So(f, ShouldBeNil)
+		})
+
+		Convey("Load with io.ReadCloser", func() {
+			cfg, err := Load(ioutil.NopCloser(bytes.NewReader([]byte(_CONF_DATA))))
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+
+			So(cfg.Section("").Key("NAME").String(), ShouldEqual, "ini")
+		})
+	})
+
+	Convey("Bad load process", t, func() {
+
+		Convey("Load from invalid data sources", func() {
+			_, err := Load(_CONF_DATA)
+			So(err, ShouldNotBeNil)
+
+			f, err := Load("testdata/404.ini")
+			So(err, ShouldNotBeNil)
+			So(f, ShouldBeNil)
+
+			_, err = Load(1)
+			So(err, ShouldNotBeNil)
+
+			_, err = Load([]byte(""), 1)
+			So(err, ShouldNotBeNil)
+		})
+
+		Convey("Load with bad section name", func() {
+			_, err := Load([]byte("[]"))
+			So(err, ShouldNotBeNil)
+
+			_, err = Load([]byte("["))
+			So(err, ShouldNotBeNil)
+		})
+
+		Convey("Load with bad keys", func() {
+			_, err := Load([]byte(`"""name`))
+			So(err, ShouldNotBeNil)
+
+			_, err = Load([]byte(`"""name"""`))
+			So(err, ShouldNotBeNil)
+
+			_, err = Load([]byte(`""=1`))
+			So(err, ShouldNotBeNil)
+
+			_, err = Load([]byte(`=`))
+			So(err, ShouldNotBeNil)
+
+			_, err = Load([]byte(`name`))
+			So(err, ShouldNotBeNil)
+		})
+
+		Convey("Load with bad values", func() {
+			_, err := Load([]byte(`name="""Unknwon`))
+			So(err, ShouldNotBeNil)
+		})
+	})
+
+	Convey("Get section and key insensitively", t, func() {
+		cfg, err := InsensitiveLoad([]byte(_CONF_DATA), "testdata/conf.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		sec, err := cfg.GetSection("Author")
+		So(err, ShouldBeNil)
+		So(sec, ShouldNotBeNil)
+
+		key, err := sec.GetKey("E-mail")
+		So(err, ShouldBeNil)
+		So(key, ShouldNotBeNil)
+	})
+
+	Convey("Load with ignoring continuation lines", t, func() {
+		cfg, err := LoadSources(LoadOptions{IgnoreContinuation: true}, []byte(`key1=a\b\
+key2=c\d\`))
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		So(cfg.Section("").Key("key1").String(), ShouldEqual, `a\b\`)
+		So(cfg.Section("").Key("key2").String(), ShouldEqual, `c\d\`)
+	})
+
+	Convey("Load with ignoring inline comments", t, func() {
+		cfg, err := LoadSources(LoadOptions{IgnoreInlineComment: true}, []byte(`key1=value ;comment
+key2=value #comment2`))
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		So(cfg.Section("").Key("key1").String(), ShouldEqual, `value ;comment`)
+		So(cfg.Section("").Key("key2").String(), ShouldEqual, `value #comment2`)
+
+		var buf bytes.Buffer
+		cfg.WriteTo(&buf)
+		So(buf.String(), ShouldEqual, `key1 = value ;comment
+key2 = value #comment2
+
+`)
+	})
+
+	Convey("Load with boolean type keys", t, func() {
+		cfg, err := LoadSources(LoadOptions{AllowBooleanKeys: true}, []byte(`key1=hello
+key2
+#key3
+key4
+key5`))
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		So(strings.Join(cfg.Section("").KeyStrings(), ","), ShouldEqual, "key1,key2,key4,key5")
+		So(cfg.Section("").Key("key2").MustBool(false), ShouldBeTrue)
+
+		var buf bytes.Buffer
+		cfg.WriteTo(&buf)
+		// there is always a trailing \n at the end of the section
+		So(buf.String(), ShouldEqual, `key1 = hello
+key2
+#key3
+key4
+key5
+`)
+	})
+}
+
+func Test_File_ChildSections(t *testing.T) {
+	Convey("Find child sections by parent name", t, func() {
+		cfg, err := Load([]byte(`
+[node]
+
+[node.biz1]
+
+[node.biz2]
+
+[node.biz3]
+
+[node.bizN]
+`))
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		children := cfg.ChildSections("node")
+		names := make([]string, len(children))
+		for i := range children {
+			names[i] = children[i].name
+		}
+		So(strings.Join(names, ","), ShouldEqual, "node.biz1,node.biz2,node.biz3,node.bizN")
+	})
+}
+
+func Test_LooseLoad(t *testing.T) {
+	Convey("Loose load from data sources", t, func() {
+		Convey("Loose load mixed with nonexistent file", func() {
+			cfg, err := LooseLoad("testdata/404.ini")
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+			var fake struct {
+				Name string `ini:"name"`
+			}
+			So(cfg.MapTo(&fake), ShouldBeNil)
+
+			cfg, err = LooseLoad([]byte("name=Unknwon"), "testdata/404.ini")
+			So(err, ShouldBeNil)
+			So(cfg.Section("").Key("name").String(), ShouldEqual, "Unknwon")
+			So(cfg.MapTo(&fake), ShouldBeNil)
+			So(fake.Name, ShouldEqual, "Unknwon")
+		})
+	})
+
+}
+
+func Test_File_Append(t *testing.T) {
+	Convey("Append data sources", t, func() {
+		cfg, err := Load([]byte(""))
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		So(cfg.Append([]byte(""), []byte("")), ShouldBeNil)
+
+		Convey("Append bad data sources", func() {
+			So(cfg.Append(1), ShouldNotBeNil)
+			So(cfg.Append([]byte(""), 1), ShouldNotBeNil)
+		})
+	})
+}
+
+func Test_File_WriteTo(t *testing.T) {
+	Convey("Write to somewhere", t, func() {
+		var buf bytes.Buffer
+		cfg := Empty()
+		cfg.WriteTo(&buf)
+	})
+}
+
+func Test_File_SaveTo_WriteTo(t *testing.T) {
+	Convey("Save file", t, func() {
+		cfg, err := Load([]byte(_CONF_DATA), "testdata/conf.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		cfg.Section("").Key("NAME").Comment = "Package name"
+		cfg.Section("author").Comment = `Information about package author
+# Bio can be written in multiple lines.`
+		cfg.Section("advanced").Key("val w/ pound").SetValue("my#password")
+		cfg.Section("advanced").Key("longest key has a colon : yes/no").SetValue("yes")
+		So(cfg.SaveTo("testdata/conf_out.ini"), ShouldBeNil)
+
+		cfg.Section("author").Key("NAME").Comment = "This is author name"
+
+		So(cfg.SaveToIndent("testdata/conf_out.ini", "\t"), ShouldBeNil)
+
+		var buf bytes.Buffer
+		_, err = cfg.WriteToIndent(&buf, "\t")
+		So(err, ShouldBeNil)
+		So(buf.String(), ShouldEqual, `; Package name
+NAME        = ini
+; Package version
+VERSION     = v1
+; Package import path
+IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
+
+; Information about package author
+# Bio can be written in multiple lines.
+[author]
+	; This is author name
+	NAME   = Unknwon
+	E-MAIL = u@gogs.io
+	GITHUB = https://github.com/%(NAME)s
+	# Succeeding comment
+	BIO    = """Gopher.
+Coding addict.
+Good man.
+"""
+
+[package]
+	CLONE_URL = https://%(IMPORT_PATH)s
+
+[package.sub]
+	UNUSED_KEY = should be deleted
+
+[features]
+	-  = Support read/write comments of keys and sections
+	-  = Support auto-increment of key names
+	-  = Support load multiple files to overwrite key values
+
+[types]
+	STRING     = str
+	BOOL       = true
+	BOOL_FALSE = false
+	FLOAT64    = 1.25
+	INT        = 10
+	TIME       = 2015-01-01T20:17:05Z
+	DURATION   = 2h45m
+	UINT       = 3
+
+[array]
+	STRINGS  = en, zh, de
+	FLOAT64S = 1.1, 2.2, 3.3
+	INTS     = 1, 2, 3
+	UINTS    = 1, 2, 3
+	TIMES    = 2015-01-01T20:17:05Z,2015-01-01T20:17:05Z,2015-01-01T20:17:05Z
+
+[note]
+	empty_lines = next line is empty
+
+; Comment before the section
+; This is a comment for the section too
+[comments]
+	; Comment before key
+	key  = value
+	; This is a comment for key2
+	key2 = value2
+	key3 = "one", "two", "three"
+
+[advance]
+	value with quotes      = some value
+	value quote2 again     = some value
+	includes comment sign  = `+"`"+"my#password"+"`"+`
+	includes comment sign2 = `+"`"+"my;password"+"`"+`
+	true                   = 2+3=5
+	`+"`"+`1+1=2`+"`"+`                = true
+	`+"`"+`6+1=7`+"`"+`                = true
+	"""`+"`"+`5+5`+"`"+`"""            = 10
+	`+"`"+`"6+6"`+"`"+`                = 12
+	`+"`"+`7-2=4`+"`"+`                = false
+	ADDRESS                = """404 road,
+NotFound, State, 50000"""
+	two_lines              = how about continuation lines?
+	lots_of_lines          = 1 2 3 4 
+
+[advanced]
+	val w/ pound                       = `+"`"+`my#password`+"`"+`
+	`+"`"+`longest key has a colon : yes/no`+"`"+` = yes
+
+`)
+	})
+}
+
+func Test_File_WriteTo_SectionRaw(t *testing.T) {
+	Convey("Write a INI with a raw section", t, func() {
+		var buf bytes.Buffer
+		cfg, err := LoadSources(
+			LoadOptions{
+				UnparseableSections: []string{"CORE_LESSON", "COMMENTS"},
+			},
+			"testdata/aicc.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+		cfg.WriteToIndent(&buf, "\t")
+		So(buf.String(), ShouldEqual, `[Core]
+	Lesson_Location = 87
+	Lesson_Status   = C
+	Score           = 3
+	Time            = 00:02:30
+
+[CORE_LESSON]
+my lesson state data – 1111111111111111111000000000000000001110000
+111111111111111111100000000000111000000000 – end my lesson state data
+[COMMENTS]
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>
+`)
+	})
+}
+
+// Helpers for slice tests.
+func float64sEqual(values []float64, expected ...float64) {
+	So(values, ShouldHaveLength, len(expected))
+	for i, v := range expected {
+		So(values[i], ShouldEqual, v)
+	}
+}
+
+func intsEqual(values []int, expected ...int) {
+	So(values, ShouldHaveLength, len(expected))
+	for i, v := range expected {
+		So(values[i], ShouldEqual, v)
+	}
+}
+
+func int64sEqual(values []int64, expected ...int64) {
+	So(values, ShouldHaveLength, len(expected))
+	for i, v := range expected {
+		So(values[i], ShouldEqual, v)
+	}
+}
+
+func uintsEqual(values []uint, expected ...uint) {
+	So(values, ShouldHaveLength, len(expected))
+	for i, v := range expected {
+		So(values[i], ShouldEqual, v)
+	}
+}
+
+func uint64sEqual(values []uint64, expected ...uint64) {
+	So(values, ShouldHaveLength, len(expected))
+	for i, v := range expected {
+		So(values[i], ShouldEqual, v)
+	}
+}
+
+func timesEqual(values []time.Time, expected ...time.Time) {
+	So(values, ShouldHaveLength, len(expected))
+	for i, v := range expected {
+		So(values[i].String(), ShouldEqual, v.String())
+	}
+}

vendor/github.com/go-ini/ini/key.go

@@ -0,0 +1,699 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Key represents a key under a section.
+type Key struct {
+	s               *Section
+	name            string
+	value           string
+	isAutoIncrement bool
+	isBooleanType   bool
+
+	isShadow bool
+	shadows  []*Key
+
+	Comment string
+}
+
+// newKey simply return a key object with given values.
+func newKey(s *Section, name, val string) *Key {
+	return &Key{
+		s:     s,
+		name:  name,
+		value: val,
+	}
+}
+
+func (k *Key) addShadow(val string) error {
+	if k.isShadow {
+		return errors.New("cannot add shadow to another shadow key")
+	} else if k.isAutoIncrement || k.isBooleanType {
+		return errors.New("cannot add shadow to auto-increment or boolean key")
+	}
+
+	shadow := newKey(k.s, k.name, val)
+	shadow.isShadow = true
+	k.shadows = append(k.shadows, shadow)
+	return nil
+}
+
+// AddShadow adds a new shadow key to itself.
+func (k *Key) AddShadow(val string) error {
+	if !k.s.f.options.AllowShadows {
+		return errors.New("shadow key is not allowed")
+	}
+	return k.addShadow(val)
+}
+
+// ValueMapper represents a mapping function for values, e.g. os.ExpandEnv
+type ValueMapper func(string) string
+
+// Name returns name of key.
+func (k *Key) Name() string {
+	return k.name
+}
+
+// Value returns raw value of key for performance purpose.
+func (k *Key) Value() string {
+	return k.value
+}
+
+// ValueWithShadows returns raw values of key and its shadows if any.
+func (k *Key) ValueWithShadows() []string {
+	if len(k.shadows) == 0 {
+		return []string{k.value}
+	}
+	vals := make([]string, len(k.shadows)+1)
+	vals[0] = k.value
+	for i := range k.shadows {
+		vals[i+1] = k.shadows[i].value
+	}
+	return vals
+}
+
+// transformValue takes a raw value and transforms to its final string.
+func (k *Key) transformValue(val string) string {
+	if k.s.f.ValueMapper != nil {
+		val = k.s.f.ValueMapper(val)
+	}
+
+	// Fail-fast if no indicate char found for recursive value
+	if !strings.Contains(val, "%") {
+		return val
+	}
+	for i := 0; i < _DEPTH_VALUES; i++ {
+		vr := varPattern.FindString(val)
+		if len(vr) == 0 {
+			break
+		}
+
+		// Take off leading '%(' and trailing ')s'.
+		noption := strings.TrimLeft(vr, "%(")
+		noption = strings.TrimRight(noption, ")s")
+
+		// Search in the same section.
+		nk, err := k.s.GetKey(noption)
+		if err != nil {
+			// Search again in default section.
+			nk, _ = k.s.f.Section("").GetKey(noption)
+		}
+
+		// Substitute by new value and take off leading '%(' and trailing ')s'.
+		val = strings.Replace(val, vr, nk.value, -1)
+	}
+	return val
+}
+
+// String returns string representation of value.
+func (k *Key) String() string {
+	return k.transformValue(k.value)
+}
+
+// Validate accepts a validate function which can
+// return modifed result as key value.
+func (k *Key) Validate(fn func(string) string) string {
+	return fn(k.String())
+}
+
+// parseBool returns the boolean value represented by the string.
+//
+// It accepts 1, t, T, TRUE, true, True, YES, yes, Yes, y, ON, on, On,
+// 0, f, F, FALSE, false, False, NO, no, No, n, OFF, off, Off.
+// Any other value returns an error.
+func parseBool(str string) (value bool, err error) {
+	switch str {
+	case "1", "t", "T", "true", "TRUE", "True", "YES", "yes", "Yes", "y", "ON", "on", "On":
+		return true, nil
+	case "0", "f", "F", "false", "FALSE", "False", "NO", "no", "No", "n", "OFF", "off", "Off":
+		return false, nil
+	}
+	return false, fmt.Errorf("parsing \"%s\": invalid syntax", str)
+}
+
+// Bool returns bool type value.
+func (k *Key) Bool() (bool, error) {
+	return parseBool(k.String())
+}
+
+// Float64 returns float64 type value.
+func (k *Key) Float64() (float64, error) {
+	return strconv.ParseFloat(k.String(), 64)
+}
+
+// Int returns int type value.
+func (k *Key) Int() (int, error) {
+	return strconv.Atoi(k.String())
+}
+
+// Int64 returns int64 type value.
+func (k *Key) Int64() (int64, error) {
+	return strconv.ParseInt(k.String(), 10, 64)
+}
+
+// Uint returns uint type valued.
+func (k *Key) Uint() (uint, error) {
+	u, e := strconv.ParseUint(k.String(), 10, 64)
+	return uint(u), e
+}
+
+// Uint64 returns uint64 type value.
+func (k *Key) Uint64() (uint64, error) {
+	return strconv.ParseUint(k.String(), 10, 64)
+}
+
+// Duration returns time.Duration type value.
+func (k *Key) Duration() (time.Duration, error) {
+	return time.ParseDuration(k.String())
+}
+
+// TimeFormat parses with given format and returns time.Time type value.
+func (k *Key) TimeFormat(format string) (time.Time, error) {
+	return time.Parse(format, k.String())
+}
+
+// Time parses with RFC3339 format and returns time.Time type value.
+func (k *Key) Time() (time.Time, error) {
+	return k.TimeFormat(time.RFC3339)
+}
+
+// MustString returns default value if key value is empty.
+func (k *Key) MustString(defaultVal string) string {
+	val := k.String()
+	if len(val) == 0 {
+		k.value = defaultVal
+		return defaultVal
+	}
+	return val
+}
+
+// MustBool always returns value without error,
+// it returns false if error occurs.
+func (k *Key) MustBool(defaultVal ...bool) bool {
+	val, err := k.Bool()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = strconv.FormatBool(defaultVal[0])
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustFloat64 always returns value without error,
+// it returns 0.0 if error occurs.
+func (k *Key) MustFloat64(defaultVal ...float64) float64 {
+	val, err := k.Float64()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = strconv.FormatFloat(defaultVal[0], 'f', -1, 64)
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustInt always returns value without error,
+// it returns 0 if error occurs.
+func (k *Key) MustInt(defaultVal ...int) int {
+	val, err := k.Int()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = strconv.FormatInt(int64(defaultVal[0]), 10)
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustInt64 always returns value without error,
+// it returns 0 if error occurs.
+func (k *Key) MustInt64(defaultVal ...int64) int64 {
+	val, err := k.Int64()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = strconv.FormatInt(defaultVal[0], 10)
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustUint always returns value without error,
+// it returns 0 if error occurs.
+func (k *Key) MustUint(defaultVal ...uint) uint {
+	val, err := k.Uint()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = strconv.FormatUint(uint64(defaultVal[0]), 10)
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustUint64 always returns value without error,
+// it returns 0 if error occurs.
+func (k *Key) MustUint64(defaultVal ...uint64) uint64 {
+	val, err := k.Uint64()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = strconv.FormatUint(defaultVal[0], 10)
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustDuration always returns value without error,
+// it returns zero value if error occurs.
+func (k *Key) MustDuration(defaultVal ...time.Duration) time.Duration {
+	val, err := k.Duration()
+	if len(defaultVal) > 0 && err != nil {
+		k.value = defaultVal[0].String()
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustTimeFormat always parses with given format and returns value without error,
+// it returns zero value if error occurs.
+func (k *Key) MustTimeFormat(format string, defaultVal ...time.Time) time.Time {
+	val, err := k.TimeFormat(format)
+	if len(defaultVal) > 0 && err != nil {
+		k.value = defaultVal[0].Format(format)
+		return defaultVal[0]
+	}
+	return val
+}
+
+// MustTime always parses with RFC3339 format and returns value without error,
+// it returns zero value if error occurs.
+func (k *Key) MustTime(defaultVal ...time.Time) time.Time {
+	return k.MustTimeFormat(time.RFC3339, defaultVal...)
+}
+
+// In always returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) In(defaultVal string, candidates []string) string {
+	val := k.String()
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InFloat64 always returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InFloat64(defaultVal float64, candidates []float64) float64 {
+	val := k.MustFloat64()
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InInt always returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InInt(defaultVal int, candidates []int) int {
+	val := k.MustInt()
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InInt64 always returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InInt64(defaultVal int64, candidates []int64) int64 {
+	val := k.MustInt64()
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InUint always returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InUint(defaultVal uint, candidates []uint) uint {
+	val := k.MustUint()
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InUint64 always returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InUint64(defaultVal uint64, candidates []uint64) uint64 {
+	val := k.MustUint64()
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InTimeFormat always parses with given format and returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InTimeFormat(format string, defaultVal time.Time, candidates []time.Time) time.Time {
+	val := k.MustTimeFormat(format)
+	for _, cand := range candidates {
+		if val == cand {
+			return val
+		}
+	}
+	return defaultVal
+}
+
+// InTime always parses with RFC3339 format and returns value without error,
+// it returns default value if error occurs or doesn't fit into candidates.
+func (k *Key) InTime(defaultVal time.Time, candidates []time.Time) time.Time {
+	return k.InTimeFormat(time.RFC3339, defaultVal, candidates)
+}
+
+// RangeFloat64 checks if value is in given range inclusively,
+// and returns default value if it's not.
+func (k *Key) RangeFloat64(defaultVal, min, max float64) float64 {
+	val := k.MustFloat64()
+	if val < min || val > max {
+		return defaultVal
+	}
+	return val
+}
+
+// RangeInt checks if value is in given range inclusively,
+// and returns default value if it's not.
+func (k *Key) RangeInt(defaultVal, min, max int) int {
+	val := k.MustInt()
+	if val < min || val > max {
+		return defaultVal
+	}
+	return val
+}
+
+// RangeInt64 checks if value is in given range inclusively,
+// and returns default value if it's not.
+func (k *Key) RangeInt64(defaultVal, min, max int64) int64 {
+	val := k.MustInt64()
+	if val < min || val > max {
+		return defaultVal
+	}
+	return val
+}
+
+// RangeTimeFormat checks if value with given format is in given range inclusively,
+// and returns default value if it's not.
+func (k *Key) RangeTimeFormat(format string, defaultVal, min, max time.Time) time.Time {
+	val := k.MustTimeFormat(format)
+	if val.Unix() < min.Unix() || val.Unix() > max.Unix() {
+		return defaultVal
+	}
+	return val
+}
+
+// RangeTime checks if value with RFC3339 format is in given range inclusively,
+// and returns default value if it's not.
+func (k *Key) RangeTime(defaultVal, min, max time.Time) time.Time {
+	return k.RangeTimeFormat(time.RFC3339, defaultVal, min, max)
+}
+
+// Strings returns list of string divided by given delimiter.
+func (k *Key) Strings(delim string) []string {
+	str := k.String()
+	if len(str) == 0 {
+		return []string{}
+	}
+
+	vals := strings.Split(str, delim)
+	for i := range vals {
+		// vals[i] = k.transformValue(strings.TrimSpace(vals[i]))
+		vals[i] = strings.TrimSpace(vals[i])
+	}
+	return vals
+}
+
+// StringsWithShadows returns list of string divided by given delimiter.
+// Shadows will also be appended if any.
+func (k *Key) StringsWithShadows(delim string) []string {
+	vals := k.ValueWithShadows()
+	results := make([]string, 0, len(vals)*2)
+	for i := range vals {
+		if len(vals) == 0 {
+			continue
+		}
+
+		results = append(results, strings.Split(vals[i], delim)...)
+	}
+
+	for i := range results {
+		results[i] = k.transformValue(strings.TrimSpace(results[i]))
+	}
+	return results
+}
+
+// Float64s returns list of float64 divided by given delimiter. Any invalid input will be treated as zero value.
+func (k *Key) Float64s(delim string) []float64 {
+	vals, _ := k.parseFloat64s(k.Strings(delim), true, false)
+	return vals
+}
+
+// Ints returns list of int divided by given delimiter. Any invalid input will be treated as zero value.
+func (k *Key) Ints(delim string) []int {
+	vals, _ := k.parseInts(k.Strings(delim), true, false)
+	return vals
+}
+
+// Int64s returns list of int64 divided by given delimiter. Any invalid input will be treated as zero value.
+func (k *Key) Int64s(delim string) []int64 {
+	vals, _ := k.parseInt64s(k.Strings(delim), true, false)
+	return vals
+}
+
+// Uints returns list of uint divided by given delimiter. Any invalid input will be treated as zero value.
+func (k *Key) Uints(delim string) []uint {
+	vals, _ := k.parseUints(k.Strings(delim), true, false)
+	return vals
+}
+
+// Uint64s returns list of uint64 divided by given delimiter. Any invalid input will be treated as zero value.
+func (k *Key) Uint64s(delim string) []uint64 {
+	vals, _ := k.parseUint64s(k.Strings(delim), true, false)
+	return vals
+}
+
+// TimesFormat parses with given format and returns list of time.Time divided by given delimiter.
+// Any invalid input will be treated as zero value (0001-01-01 00:00:00 +0000 UTC).
+func (k *Key) TimesFormat(format, delim string) []time.Time {
+	vals, _ := k.parseTimesFormat(format, k.Strings(delim), true, false)
+	return vals
+}
+
+// Times parses with RFC3339 format and returns list of time.Time divided by given delimiter.
+// Any invalid input will be treated as zero value (0001-01-01 00:00:00 +0000 UTC).
+func (k *Key) Times(delim string) []time.Time {
+	return k.TimesFormat(time.RFC3339, delim)
+}
+
+// ValidFloat64s returns list of float64 divided by given delimiter. If some value is not float, then
+// it will not be included to result list.
+func (k *Key) ValidFloat64s(delim string) []float64 {
+	vals, _ := k.parseFloat64s(k.Strings(delim), false, false)
+	return vals
+}
+
+// ValidInts returns list of int divided by given delimiter. If some value is not integer, then it will
+// not be included to result list.
+func (k *Key) ValidInts(delim string) []int {
+	vals, _ := k.parseInts(k.Strings(delim), false, false)
+	return vals
+}
+
+// ValidInt64s returns list of int64 divided by given delimiter. If some value is not 64-bit integer,
+// then it will not be included to result list.
+func (k *Key) ValidInt64s(delim string) []int64 {
+	vals, _ := k.parseInt64s(k.Strings(delim), false, false)
+	return vals
+}
+
+// ValidUints returns list of uint divided by given delimiter. If some value is not unsigned integer,
+// then it will not be included to result list.
+func (k *Key) ValidUints(delim string) []uint {
+	vals, _ := k.parseUints(k.Strings(delim), false, false)
+	return vals
+}
+
+// ValidUint64s returns list of uint64 divided by given delimiter. If some value is not 64-bit unsigned
+// integer, then it will not be included to result list.
+func (k *Key) ValidUint64s(delim string) []uint64 {
+	vals, _ := k.parseUint64s(k.Strings(delim), false, false)
+	return vals
+}
+
+// ValidTimesFormat parses with given format and returns list of time.Time divided by given delimiter.
+func (k *Key) ValidTimesFormat(format, delim string) []time.Time {
+	vals, _ := k.parseTimesFormat(format, k.Strings(delim), false, false)
+	return vals
+}
+
+// ValidTimes parses with RFC3339 format and returns list of time.Time divided by given delimiter.
+func (k *Key) ValidTimes(delim string) []time.Time {
+	return k.ValidTimesFormat(time.RFC3339, delim)
+}
+
+// StrictFloat64s returns list of float64 divided by given delimiter or error on first invalid input.
+func (k *Key) StrictFloat64s(delim string) ([]float64, error) {
+	return k.parseFloat64s(k.Strings(delim), false, true)
+}
+
+// StrictInts returns list of int divided by given delimiter or error on first invalid input.
+func (k *Key) StrictInts(delim string) ([]int, error) {
+	return k.parseInts(k.Strings(delim), false, true)
+}
+
+// StrictInt64s returns list of int64 divided by given delimiter or error on first invalid input.
+func (k *Key) StrictInt64s(delim string) ([]int64, error) {
+	return k.parseInt64s(k.Strings(delim), false, true)
+}
+
+// StrictUints returns list of uint divided by given delimiter or error on first invalid input.
+func (k *Key) StrictUints(delim string) ([]uint, error) {
+	return k.parseUints(k.Strings(delim), false, true)
+}
+
+// StrictUint64s returns list of uint64 divided by given delimiter or error on first invalid input.
+func (k *Key) StrictUint64s(delim string) ([]uint64, error) {
+	return k.parseUint64s(k.Strings(delim), false, true)
+}
+
+// StrictTimesFormat parses with given format and returns list of time.Time divided by given delimiter
+// or error on first invalid input.
+func (k *Key) StrictTimesFormat(format, delim string) ([]time.Time, error) {
+	return k.parseTimesFormat(format, k.Strings(delim), false, true)
+}
+
+// StrictTimes parses with RFC3339 format and returns list of time.Time divided by given delimiter
+// or error on first invalid input.
+func (k *Key) StrictTimes(delim string) ([]time.Time, error) {
+	return k.StrictTimesFormat(time.RFC3339, delim)
+}
+
+// parseFloat64s transforms strings to float64s.
+func (k *Key) parseFloat64s(strs []string, addInvalid, returnOnInvalid bool) ([]float64, error) {
+	vals := make([]float64, 0, len(strs))
+	for _, str := range strs {
+		val, err := strconv.ParseFloat(str, 64)
+		if err != nil && returnOnInvalid {
+			return nil, err
+		}
+		if err == nil || addInvalid {
+			vals = append(vals, val)
+		}
+	}
+	return vals, nil
+}
+
+// parseInts transforms strings to ints.
+func (k *Key) parseInts(strs []string, addInvalid, returnOnInvalid bool) ([]int, error) {
+	vals := make([]int, 0, len(strs))
+	for _, str := range strs {
+		val, err := strconv.Atoi(str)
+		if err != nil && returnOnInvalid {
+			return nil, err
+		}
+		if err == nil || addInvalid {
+			vals = append(vals, val)
+		}
+	}
+	return vals, nil
+}
+
+// parseInt64s transforms strings to int64s.
+func (k *Key) parseInt64s(strs []string, addInvalid, returnOnInvalid bool) ([]int64, error) {
+	vals := make([]int64, 0, len(strs))
+	for _, str := range strs {
+		val, err := strconv.ParseInt(str, 10, 64)
+		if err != nil && returnOnInvalid {
+			return nil, err
+		}
+		if err == nil || addInvalid {
+			vals = append(vals, val)
+		}
+	}
+	return vals, nil
+}
+
+// parseUints transforms strings to uints.
+func (k *Key) parseUints(strs []string, addInvalid, returnOnInvalid bool) ([]uint, error) {
+	vals := make([]uint, 0, len(strs))
+	for _, str := range strs {
+		val, err := strconv.ParseUint(str, 10, 0)
+		if err != nil && returnOnInvalid {
+			return nil, err
+		}
+		if err == nil || addInvalid {
+			vals = append(vals, uint(val))
+		}
+	}
+	return vals, nil
+}
+
+// parseUint64s transforms strings to uint64s.
+func (k *Key) parseUint64s(strs []string, addInvalid, returnOnInvalid bool) ([]uint64, error) {
+	vals := make([]uint64, 0, len(strs))
+	for _, str := range strs {
+		val, err := strconv.ParseUint(str, 10, 64)
+		if err != nil && returnOnInvalid {
+			return nil, err
+		}
+		if err == nil || addInvalid {
+			vals = append(vals, val)
+		}
+	}
+	return vals, nil
+}
+
+// parseTimesFormat transforms strings to times in given format.
+func (k *Key) parseTimesFormat(format string, strs []string, addInvalid, returnOnInvalid bool) ([]time.Time, error) {
+	vals := make([]time.Time, 0, len(strs))
+	for _, str := range strs {
+		val, err := time.Parse(format, str)
+		if err != nil && returnOnInvalid {
+			return nil, err
+		}
+		if err == nil || addInvalid {
+			vals = append(vals, val)
+		}
+	}
+	return vals, nil
+}
+
+// SetValue changes key value.
+func (k *Key) SetValue(v string) {
+	if k.s.f.BlockMode {
+		k.s.f.lock.Lock()
+		defer k.s.f.lock.Unlock()
+	}
+
+	k.value = v
+	k.s.keysHash[k.name] = v
+}

vendor/github.com/go-ini/ini/key_test.go

@@ -0,0 +1,573 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func Test_Key(t *testing.T) {
+	Convey("Test getting and setting values", t, func() {
+		cfg, err := Load([]byte(_CONF_DATA), "testdata/conf.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		Convey("Get values in default section", func() {
+			sec := cfg.Section("")
+			So(sec, ShouldNotBeNil)
+			So(sec.Key("NAME").Value(), ShouldEqual, "ini")
+			So(sec.Key("NAME").String(), ShouldEqual, "ini")
+			So(sec.Key("NAME").Validate(func(in string) string {
+				return in
+			}), ShouldEqual, "ini")
+			So(sec.Key("NAME").Comment, ShouldEqual, "; Package name")
+			So(sec.Key("IMPORT_PATH").String(), ShouldEqual, "gopkg.in/ini.v1")
+		})
+
+		Convey("Get values in non-default section", func() {
+			sec := cfg.Section("author")
+			So(sec, ShouldNotBeNil)
+			So(sec.Key("NAME").String(), ShouldEqual, "Unknwon")
+			So(sec.Key("GITHUB").String(), ShouldEqual, "https://github.com/Unknwon")
+
+			sec = cfg.Section("package")
+			So(sec, ShouldNotBeNil)
+			So(sec.Key("CLONE_URL").String(), ShouldEqual, "https://gopkg.in/ini.v1")
+		})
+
+		Convey("Get auto-increment key names", func() {
+			keys := cfg.Section("features").Keys()
+			for i, k := range keys {
+				So(k.Name(), ShouldEqual, fmt.Sprintf("#%d", i+1))
+			}
+		})
+
+		Convey("Get parent-keys that are available to the child section", func() {
+			parentKeys := cfg.Section("package.sub").ParentKeys()
+			for _, k := range parentKeys {
+				So(k.Name(), ShouldEqual, "CLONE_URL")
+			}
+		})
+
+		Convey("Get overwrite value", func() {
+			So(cfg.Section("author").Key("E-MAIL").String(), ShouldEqual, "u@gogs.io")
+		})
+
+		Convey("Get sections", func() {
+			sections := cfg.Sections()
+			for i, name := range []string{DEFAULT_SECTION, "author", "package", "package.sub", "features", "types", "array", "note", "comments", "advance"} {
+				So(sections[i].Name(), ShouldEqual, name)
+			}
+		})
+
+		Convey("Get parent section value", func() {
+			So(cfg.Section("package.sub").Key("CLONE_URL").String(), ShouldEqual, "https://gopkg.in/ini.v1")
+			So(cfg.Section("package.fake.sub").Key("CLONE_URL").String(), ShouldEqual, "https://gopkg.in/ini.v1")
+		})
+
+		Convey("Get multiple line value", func() {
+			So(cfg.Section("author").Key("BIO").String(), ShouldEqual, "Gopher.\nCoding addict.\nGood man.\n")
+		})
+
+		Convey("Get values with type", func() {
+			sec := cfg.Section("types")
+			v1, err := sec.Key("BOOL").Bool()
+			So(err, ShouldBeNil)
+			So(v1, ShouldBeTrue)
+
+			v1, err = sec.Key("BOOL_FALSE").Bool()
+			So(err, ShouldBeNil)
+			So(v1, ShouldBeFalse)
+
+			v2, err := sec.Key("FLOAT64").Float64()
+			So(err, ShouldBeNil)
+			So(v2, ShouldEqual, 1.25)
+
+			v3, err := sec.Key("INT").Int()
+			So(err, ShouldBeNil)
+			So(v3, ShouldEqual, 10)
+
+			v4, err := sec.Key("INT").Int64()
+			So(err, ShouldBeNil)
+			So(v4, ShouldEqual, 10)
+
+			v5, err := sec.Key("UINT").Uint()
+			So(err, ShouldBeNil)
+			So(v5, ShouldEqual, 3)
+
+			v6, err := sec.Key("UINT").Uint64()
+			So(err, ShouldBeNil)
+			So(v6, ShouldEqual, 3)
+
+			t, err := time.Parse(time.RFC3339, "2015-01-01T20:17:05Z")
+			So(err, ShouldBeNil)
+			v7, err := sec.Key("TIME").Time()
+			So(err, ShouldBeNil)
+			So(v7.String(), ShouldEqual, t.String())
+
+			Convey("Must get values with type", func() {
+				So(sec.Key("STRING").MustString("404"), ShouldEqual, "str")
+				So(sec.Key("BOOL").MustBool(), ShouldBeTrue)
+				So(sec.Key("FLOAT64").MustFloat64(), ShouldEqual, 1.25)
+				So(sec.Key("INT").MustInt(), ShouldEqual, 10)
+				So(sec.Key("INT").MustInt64(), ShouldEqual, 10)
+				So(sec.Key("UINT").MustUint(), ShouldEqual, 3)
+				So(sec.Key("UINT").MustUint64(), ShouldEqual, 3)
+				So(sec.Key("TIME").MustTime().String(), ShouldEqual, t.String())
+
+				dur, err := time.ParseDuration("2h45m")
+				So(err, ShouldBeNil)
+				So(sec.Key("DURATION").MustDuration().Seconds(), ShouldEqual, dur.Seconds())
+
+				Convey("Must get values with default value", func() {
+					So(sec.Key("STRING_404").MustString("404"), ShouldEqual, "404")
+					So(sec.Key("BOOL_404").MustBool(true), ShouldBeTrue)
+					So(sec.Key("FLOAT64_404").MustFloat64(2.5), ShouldEqual, 2.5)
+					So(sec.Key("INT_404").MustInt(15), ShouldEqual, 15)
+					So(sec.Key("INT64_404").MustInt64(15), ShouldEqual, 15)
+					So(sec.Key("UINT_404").MustUint(6), ShouldEqual, 6)
+					So(sec.Key("UINT64_404").MustUint64(6), ShouldEqual, 6)
+
+					t, err := time.Parse(time.RFC3339, "2014-01-01T20:17:05Z")
+					So(err, ShouldBeNil)
+					So(sec.Key("TIME_404").MustTime(t).String(), ShouldEqual, t.String())
+
+					So(sec.Key("DURATION_404").MustDuration(dur).Seconds(), ShouldEqual, dur.Seconds())
+
+					Convey("Must should set default as key value", func() {
+						So(sec.Key("STRING_404").String(), ShouldEqual, "404")
+						So(sec.Key("BOOL_404").String(), ShouldEqual, "true")
+						So(sec.Key("FLOAT64_404").String(), ShouldEqual, "2.5")
+						So(sec.Key("INT_404").String(), ShouldEqual, "15")
+						So(sec.Key("INT64_404").String(), ShouldEqual, "15")
+						So(sec.Key("UINT_404").String(), ShouldEqual, "6")
+						So(sec.Key("UINT64_404").String(), ShouldEqual, "6")
+						So(sec.Key("TIME_404").String(), ShouldEqual, "2014-01-01T20:17:05Z")
+						So(sec.Key("DURATION_404").String(), ShouldEqual, "2h45m0s")
+					})
+				})
+			})
+		})
+
+		Convey("Get value with candidates", func() {
+			sec := cfg.Section("types")
+			So(sec.Key("STRING").In("", []string{"str", "arr", "types"}), ShouldEqual, "str")
+			So(sec.Key("FLOAT64").InFloat64(0, []float64{1.25, 2.5, 3.75}), ShouldEqual, 1.25)
+			So(sec.Key("INT").InInt(0, []int{10, 20, 30}), ShouldEqual, 10)
+			So(sec.Key("INT").InInt64(0, []int64{10, 20, 30}), ShouldEqual, 10)
+			So(sec.Key("UINT").InUint(0, []uint{3, 6, 9}), ShouldEqual, 3)
+			So(sec.Key("UINT").InUint64(0, []uint64{3, 6, 9}), ShouldEqual, 3)
+
+			zt, err := time.Parse(time.RFC3339, "0001-01-01T01:00:00Z")
+			So(err, ShouldBeNil)
+			t, err := time.Parse(time.RFC3339, "2015-01-01T20:17:05Z")
+			So(err, ShouldBeNil)
+			So(sec.Key("TIME").InTime(zt, []time.Time{t, time.Now(), time.Now().Add(1 * time.Second)}).String(), ShouldEqual, t.String())
+
+			Convey("Get value with candidates and default value", func() {
+				So(sec.Key("STRING_404").In("str", []string{"str", "arr", "types"}), ShouldEqual, "str")
+				So(sec.Key("FLOAT64_404").InFloat64(1.25, []float64{1.25, 2.5, 3.75}), ShouldEqual, 1.25)
+				So(sec.Key("INT_404").InInt(10, []int{10, 20, 30}), ShouldEqual, 10)
+				So(sec.Key("INT64_404").InInt64(10, []int64{10, 20, 30}), ShouldEqual, 10)
+				So(sec.Key("UINT_404").InUint(3, []uint{3, 6, 9}), ShouldEqual, 3)
+				So(sec.Key("UINT_404").InUint64(3, []uint64{3, 6, 9}), ShouldEqual, 3)
+				So(sec.Key("TIME_404").InTime(t, []time.Time{time.Now(), time.Now(), time.Now().Add(1 * time.Second)}).String(), ShouldEqual, t.String())
+			})
+		})
+
+		Convey("Get values in range", func() {
+			sec := cfg.Section("types")
+			So(sec.Key("FLOAT64").RangeFloat64(0, 1, 2), ShouldEqual, 1.25)
+			So(sec.Key("INT").RangeInt(0, 10, 20), ShouldEqual, 10)
+			So(sec.Key("INT").RangeInt64(0, 10, 20), ShouldEqual, 10)
+
+			minT, err := time.Parse(time.RFC3339, "0001-01-01T01:00:00Z")
+			So(err, ShouldBeNil)
+			midT, err := time.Parse(time.RFC3339, "2013-01-01T01:00:00Z")
+			So(err, ShouldBeNil)
+			maxT, err := time.Parse(time.RFC3339, "9999-01-01T01:00:00Z")
+			So(err, ShouldBeNil)
+			t, err := time.Parse(time.RFC3339, "2015-01-01T20:17:05Z")
+			So(err, ShouldBeNil)
+			So(sec.Key("TIME").RangeTime(t, minT, maxT).String(), ShouldEqual, t.String())
+
+			Convey("Get value in range with default value", func() {
+				So(sec.Key("FLOAT64").RangeFloat64(5, 0, 1), ShouldEqual, 5)
+				So(sec.Key("INT").RangeInt(7, 0, 5), ShouldEqual, 7)
+				So(sec.Key("INT").RangeInt64(7, 0, 5), ShouldEqual, 7)
+				So(sec.Key("TIME").RangeTime(t, minT, midT).String(), ShouldEqual, t.String())
+			})
+		})
+
+		Convey("Get values into slice", func() {
+			sec := cfg.Section("array")
+			So(strings.Join(sec.Key("STRINGS").Strings(","), ","), ShouldEqual, "en,zh,de")
+			So(len(sec.Key("STRINGS_404").Strings(",")), ShouldEqual, 0)
+
+			vals1 := sec.Key("FLOAT64S").Float64s(",")
+			float64sEqual(vals1, 1.1, 2.2, 3.3)
+
+			vals2 := sec.Key("INTS").Ints(",")
+			intsEqual(vals2, 1, 2, 3)
+
+			vals3 := sec.Key("INTS").Int64s(",")
+			int64sEqual(vals3, 1, 2, 3)
+
+			vals4 := sec.Key("UINTS").Uints(",")
+			uintsEqual(vals4, 1, 2, 3)
+
+			vals5 := sec.Key("UINTS").Uint64s(",")
+			uint64sEqual(vals5, 1, 2, 3)
+
+			t, err := time.Parse(time.RFC3339, "2015-01-01T20:17:05Z")
+			So(err, ShouldBeNil)
+			vals6 := sec.Key("TIMES").Times(",")
+			timesEqual(vals6, t, t, t)
+		})
+
+		Convey("Get valid values into slice", func() {
+			sec := cfg.Section("array")
+			vals1 := sec.Key("FLOAT64S").ValidFloat64s(",")
+			float64sEqual(vals1, 1.1, 2.2, 3.3)
+
+			vals2 := sec.Key("INTS").ValidInts(",")
+			intsEqual(vals2, 1, 2, 3)
+
+			vals3 := sec.Key("INTS").ValidInt64s(",")
+			int64sEqual(vals3, 1, 2, 3)
+
+			vals4 := sec.Key("UINTS").ValidUints(",")
+			uintsEqual(vals4, 1, 2, 3)
+
+			vals5 := sec.Key("UINTS").ValidUint64s(",")
+			uint64sEqual(vals5, 1, 2, 3)
+
+			t, err := time.Parse(time.RFC3339, "2015-01-01T20:17:05Z")
+			So(err, ShouldBeNil)
+			vals6 := sec.Key("TIMES").ValidTimes(",")
+			timesEqual(vals6, t, t, t)
+		})
+
+		Convey("Get values one type into slice of another type", func() {
+			sec := cfg.Section("array")
+			vals1 := sec.Key("STRINGS").ValidFloat64s(",")
+			So(vals1, ShouldBeEmpty)
+
+			vals2 := sec.Key("STRINGS").ValidInts(",")
+			So(vals2, ShouldBeEmpty)
+
+			vals3 := sec.Key("STRINGS").ValidInt64s(",")
+			So(vals3, ShouldBeEmpty)
+
+			vals4 := sec.Key("STRINGS").ValidUints(",")
+			So(vals4, ShouldBeEmpty)
+
+			vals5 := sec.Key("STRINGS").ValidUint64s(",")
+			So(vals5, ShouldBeEmpty)
+
+			vals6 := sec.Key("STRINGS").ValidTimes(",")
+			So(vals6, ShouldBeEmpty)
+		})
+
+		Convey("Get valid values into slice without errors", func() {
+			sec := cfg.Section("array")
+			vals1, err := sec.Key("FLOAT64S").StrictFloat64s(",")
+			So(err, ShouldBeNil)
+			float64sEqual(vals1, 1.1, 2.2, 3.3)
+
+			vals2, err := sec.Key("INTS").StrictInts(",")
+			So(err, ShouldBeNil)
+			intsEqual(vals2, 1, 2, 3)
+
+			vals3, err := sec.Key("INTS").StrictInt64s(",")
+			So(err, ShouldBeNil)
+			int64sEqual(vals3, 1, 2, 3)
+
+			vals4, err := sec.Key("UINTS").StrictUints(",")
+			So(err, ShouldBeNil)
+			uintsEqual(vals4, 1, 2, 3)
+
+			vals5, err := sec.Key("UINTS").StrictUint64s(",")
+			So(err, ShouldBeNil)
+			uint64sEqual(vals5, 1, 2, 3)
+
+			t, err := time.Parse(time.RFC3339, "2015-01-01T20:17:05Z")
+			So(err, ShouldBeNil)
+			vals6, err := sec.Key("TIMES").StrictTimes(",")
+			So(err, ShouldBeNil)
+			timesEqual(vals6, t, t, t)
+		})
+
+		Convey("Get invalid values into slice", func() {
+			sec := cfg.Section("array")
+			vals1, err := sec.Key("STRINGS").StrictFloat64s(",")
+			So(vals1, ShouldBeEmpty)
+			So(err, ShouldNotBeNil)
+
+			vals2, err := sec.Key("STRINGS").StrictInts(",")
+			So(vals2, ShouldBeEmpty)
+			So(err, ShouldNotBeNil)
+
+			vals3, err := sec.Key("STRINGS").StrictInt64s(",")
+			So(vals3, ShouldBeEmpty)
+			So(err, ShouldNotBeNil)
+
+			vals4, err := sec.Key("STRINGS").StrictUints(",")
+			So(vals4, ShouldBeEmpty)
+			So(err, ShouldNotBeNil)
+
+			vals5, err := sec.Key("STRINGS").StrictUint64s(",")
+			So(vals5, ShouldBeEmpty)
+			So(err, ShouldNotBeNil)
+
+			vals6, err := sec.Key("STRINGS").StrictTimes(",")
+			So(vals6, ShouldBeEmpty)
+			So(err, ShouldNotBeNil)
+		})
+
+		Convey("Get key hash", func() {
+			cfg.Section("").KeysHash()
+		})
+
+		Convey("Set key value", func() {
+			k := cfg.Section("author").Key("NAME")
+			k.SetValue("无闻")
+			So(k.String(), ShouldEqual, "无闻")
+		})
+
+		Convey("Get key strings", func() {
+			So(strings.Join(cfg.Section("types").KeyStrings(), ","), ShouldEqual, "STRING,BOOL,BOOL_FALSE,FLOAT64,INT,TIME,DURATION,UINT")
+		})
+
+		Convey("Delete a key", func() {
+			cfg.Section("package.sub").DeleteKey("UNUSED_KEY")
+			_, err := cfg.Section("package.sub").GetKey("UNUSED_KEY")
+			So(err, ShouldNotBeNil)
+		})
+
+		Convey("Has Key (backwards compatible)", func() {
+			sec := cfg.Section("package.sub")
+			haskey1 := sec.Haskey("UNUSED_KEY")
+			haskey2 := sec.Haskey("CLONE_URL")
+			haskey3 := sec.Haskey("CLONE_URL_NO")
+			So(haskey1, ShouldBeTrue)
+			So(haskey2, ShouldBeTrue)
+			So(haskey3, ShouldBeFalse)
+		})
+
+		Convey("Has Key", func() {
+			sec := cfg.Section("package.sub")
+			haskey1 := sec.HasKey("UNUSED_KEY")
+			haskey2 := sec.HasKey("CLONE_URL")
+			haskey3 := sec.HasKey("CLONE_URL_NO")
+			So(haskey1, ShouldBeTrue)
+			So(haskey2, ShouldBeTrue)
+			So(haskey3, ShouldBeFalse)
+		})
+
+		Convey("Has Value", func() {
+			sec := cfg.Section("author")
+			hasvalue1 := sec.HasValue("Unknwon")
+			hasvalue2 := sec.HasValue("doc")
+			So(hasvalue1, ShouldBeTrue)
+			So(hasvalue2, ShouldBeFalse)
+		})
+	})
+
+	Convey("Test getting and setting bad values", t, func() {
+		cfg, err := Load([]byte(_CONF_DATA), "testdata/conf.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		Convey("Create new key with empty name", func() {
+			k, err := cfg.Section("").NewKey("", "")
+			So(err, ShouldNotBeNil)
+			So(k, ShouldBeNil)
+		})
+
+		Convey("Create new section with empty name", func() {
+			s, err := cfg.NewSection("")
+			So(err, ShouldNotBeNil)
+			So(s, ShouldBeNil)
+		})
+
+		Convey("Create new sections with empty name", func() {
+			So(cfg.NewSections(""), ShouldNotBeNil)
+		})
+
+		Convey("Get section that not exists", func() {
+			s, err := cfg.GetSection("404")
+			So(err, ShouldNotBeNil)
+			So(s, ShouldBeNil)
+
+			s = cfg.Section("404")
+			So(s, ShouldNotBeNil)
+		})
+	})
+
+	Convey("Test key hash clone", t, func() {
+		cfg, err := Load([]byte(strings.Replace("network=tcp,addr=127.0.0.1:6379,db=4,pool_size=100,idle_timeout=180", ",", "\n", -1)))
+		So(err, ShouldBeNil)
+		for _, v := range cfg.Section("").KeysHash() {
+			So(len(v), ShouldBeGreaterThan, 0)
+		}
+	})
+
+	Convey("Key has empty value", t, func() {
+		_conf := `key1=
+key2= ; comment`
+		cfg, err := Load([]byte(_conf))
+		So(err, ShouldBeNil)
+		So(cfg.Section("").Key("key1").Value(), ShouldBeEmpty)
+	})
+}
+
+const _CONF_GIT_CONFIG = `
+[remote "origin"]
+        url = https://github.com/Antergone/test1.git
+        url = https://github.com/Antergone/test2.git
+`
+
+func Test_Key_Shadows(t *testing.T) {
+	Convey("Shadows keys", t, func() {
+		Convey("Disable shadows", func() {
+			cfg, err := Load([]byte(_CONF_GIT_CONFIG))
+			So(err, ShouldBeNil)
+			So(cfg.Section(`remote "origin"`).Key("url").String(), ShouldEqual, "https://github.com/Antergone/test2.git")
+		})
+
+		Convey("Enable shadows", func() {
+			cfg, err := ShadowLoad([]byte(_CONF_GIT_CONFIG))
+			So(err, ShouldBeNil)
+			So(cfg.Section(`remote "origin"`).Key("url").String(), ShouldEqual, "https://github.com/Antergone/test1.git")
+			So(strings.Join(cfg.Section(`remote "origin"`).Key("url").ValueWithShadows(), " "), ShouldEqual,
+				"https://github.com/Antergone/test1.git https://github.com/Antergone/test2.git")
+
+			Convey("Save with shadows", func() {
+				var buf bytes.Buffer
+				_, err := cfg.WriteTo(&buf)
+				So(err, ShouldBeNil)
+				So(buf.String(), ShouldEqual, `[remote "origin"]
+url = https://github.com/Antergone/test1.git
+url = https://github.com/Antergone/test2.git
+
+`)
+			})
+		})
+	})
+}
+
+func newTestFile(block bool) *File {
+	c, _ := Load([]byte(_CONF_DATA))
+	c.BlockMode = block
+	return c
+}
+
+func Benchmark_Key_Value(b *testing.B) {
+	c := newTestFile(true)
+	for i := 0; i < b.N; i++ {
+		c.Section("").Key("NAME").Value()
+	}
+}
+
+func Benchmark_Key_Value_NonBlock(b *testing.B) {
+	c := newTestFile(false)
+	for i := 0; i < b.N; i++ {
+		c.Section("").Key("NAME").Value()
+	}
+}
+
+func Benchmark_Key_Value_ViaSection(b *testing.B) {
+	c := newTestFile(true)
+	sec := c.Section("")
+	for i := 0; i < b.N; i++ {
+		sec.Key("NAME").Value()
+	}
+}
+
+func Benchmark_Key_Value_ViaSection_NonBlock(b *testing.B) {
+	c := newTestFile(false)
+	sec := c.Section("")
+	for i := 0; i < b.N; i++ {
+		sec.Key("NAME").Value()
+	}
+}
+
+func Benchmark_Key_Value_Direct(b *testing.B) {
+	c := newTestFile(true)
+	key := c.Section("").Key("NAME")
+	for i := 0; i < b.N; i++ {
+		key.Value()
+	}
+}
+
+func Benchmark_Key_Value_Direct_NonBlock(b *testing.B) {
+	c := newTestFile(false)
+	key := c.Section("").Key("NAME")
+	for i := 0; i < b.N; i++ {
+		key.Value()
+	}
+}
+
+func Benchmark_Key_String(b *testing.B) {
+	c := newTestFile(true)
+	for i := 0; i < b.N; i++ {
+		_ = c.Section("").Key("NAME").String()
+	}
+}
+
+func Benchmark_Key_String_NonBlock(b *testing.B) {
+	c := newTestFile(false)
+	for i := 0; i < b.N; i++ {
+		_ = c.Section("").Key("NAME").String()
+	}
+}
+
+func Benchmark_Key_String_ViaSection(b *testing.B) {
+	c := newTestFile(true)
+	sec := c.Section("")
+	for i := 0; i < b.N; i++ {
+		_ = sec.Key("NAME").String()
+	}
+}
+
+func Benchmark_Key_String_ViaSection_NonBlock(b *testing.B) {
+	c := newTestFile(false)
+	sec := c.Section("")
+	for i := 0; i < b.N; i++ {
+		_ = sec.Key("NAME").String()
+	}
+}
+
+func Benchmark_Key_SetValue(b *testing.B) {
+	c := newTestFile(true)
+	for i := 0; i < b.N; i++ {
+		c.Section("").Key("NAME").SetValue("10")
+	}
+}
+
+func Benchmark_Key_SetValue_VisSection(b *testing.B) {
+	c := newTestFile(true)
+	sec := c.Section("")
+	for i := 0; i < b.N; i++ {
+		sec.Key("NAME").SetValue("10")
+	}
+}

vendor/github.com/go-ini/ini/parser.go

@@ -0,0 +1,361 @@
+// Copyright 2015 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+type tokenType int
+
+const (
+	_TOKEN_INVALID tokenType = iota
+	_TOKEN_COMMENT
+	_TOKEN_SECTION
+	_TOKEN_KEY
+)
+
+type parser struct {
+	buf     *bufio.Reader
+	isEOF   bool
+	count   int
+	comment *bytes.Buffer
+}
+
+func newParser(r io.Reader) *parser {
+	return &parser{
+		buf:     bufio.NewReader(r),
+		count:   1,
+		comment: &bytes.Buffer{},
+	}
+}
+
+// BOM handles header of UTF-8, UTF-16 LE and UTF-16 BE's BOM format.
+// http://en.wikipedia.org/wiki/Byte_order_mark#Representations_of_byte_order_marks_by_encoding
+func (p *parser) BOM() error {
+	mask, err := p.buf.Peek(2)
+	if err != nil && err != io.EOF {
+		return err
+	} else if len(mask) < 2 {
+		return nil
+	}
+
+	switch {
+	case mask[0] == 254 && mask[1] == 255:
+		fallthrough
+	case mask[0] == 255 && mask[1] == 254:
+		p.buf.Read(mask)
+	case mask[0] == 239 && mask[1] == 187:
+		mask, err := p.buf.Peek(3)
+		if err != nil && err != io.EOF {
+			return err
+		} else if len(mask) < 3 {
+			return nil
+		}
+		if mask[2] == 191 {
+			p.buf.Read(mask)
+		}
+	}
+	return nil
+}
+
+func (p *parser) readUntil(delim byte) ([]byte, error) {
+	data, err := p.buf.ReadBytes(delim)
+	if err != nil {
+		if err == io.EOF {
+			p.isEOF = true
+		} else {
+			return nil, err
+		}
+	}
+	return data, nil
+}
+
+func cleanComment(in []byte) ([]byte, bool) {
+	i := bytes.IndexAny(in, "#;")
+	if i == -1 {
+		return nil, false
+	}
+	return in[i:], true
+}
+
+func readKeyName(in []byte) (string, int, error) {
+	line := string(in)
+
+	// Check if key name surrounded by quotes.
+	var keyQuote string
+	if line[0] == '"' {
+		if len(line) > 6 && string(line[0:3]) == `"""` {
+			keyQuote = `"""`
+		} else {
+			keyQuote = `"`
+		}
+	} else if line[0] == '`' {
+		keyQuote = "`"
+	}
+
+	// Get out key name
+	endIdx := -1
+	if len(keyQuote) > 0 {
+		startIdx := len(keyQuote)
+		// FIXME: fail case -> """"""name"""=value
+		pos := strings.Index(line[startIdx:], keyQuote)
+		if pos == -1 {
+			return "", -1, fmt.Errorf("missing closing key quote: %s", line)
+		}
+		pos += startIdx
+
+		// Find key-value delimiter
+		i := strings.IndexAny(line[pos+startIdx:], "=:")
+		if i < 0 {
+			return "", -1, ErrDelimiterNotFound{line}
+		}
+		endIdx = pos + i
+		return strings.TrimSpace(line[startIdx:pos]), endIdx + startIdx + 1, nil
+	}
+
+	endIdx = strings.IndexAny(line, "=:")
+	if endIdx < 0 {
+		return "", -1, ErrDelimiterNotFound{line}
+	}
+	return strings.TrimSpace(line[0:endIdx]), endIdx + 1, nil
+}
+
+func (p *parser) readMultilines(line, val, valQuote string) (string, error) {
+	for {
+		data, err := p.readUntil('\n')
+		if err != nil {
+			return "", err
+		}
+		next := string(data)
+
+		pos := strings.LastIndex(next, valQuote)
+		if pos > -1 {
+			val += next[:pos]
+
+			comment, has := cleanComment([]byte(next[pos:]))
+			if has {
+				p.comment.Write(bytes.TrimSpace(comment))
+			}
+			break
+		}
+		val += next
+		if p.isEOF {
+			return "", fmt.Errorf("missing closing key quote from '%s' to '%s'", line, next)
+		}
+	}
+	return val, nil
+}
+
+func (p *parser) readContinuationLines(val string) (string, error) {
+	for {
+		data, err := p.readUntil('\n')
+		if err != nil {
+			return "", err
+		}
+		next := strings.TrimSpace(string(data))
+
+		if len(next) == 0 {
+			break
+		}
+		val += next
+		if val[len(val)-1] != '\\' {
+			break
+		}
+		val = val[:len(val)-1]
+	}
+	return val, nil
+}
+
+// hasSurroundedQuote check if and only if the first and last characters
+// are quotes \" or \'.
+// It returns false if any other parts also contain same kind of quotes.
+func hasSurroundedQuote(in string, quote byte) bool {
+	return len(in) >= 2 && in[0] == quote && in[len(in)-1] == quote &&
+		strings.IndexByte(in[1:], quote) == len(in)-2
+}
+
+func (p *parser) readValue(in []byte, ignoreContinuation, ignoreInlineComment bool) (string, error) {
+	line := strings.TrimLeftFunc(string(in), unicode.IsSpace)
+	if len(line) == 0 {
+		return "", nil
+	}
+
+	var valQuote string
+	if len(line) > 3 && string(line[0:3]) == `"""` {
+		valQuote = `"""`
+	} else if line[0] == '`' {
+		valQuote = "`"
+	}
+
+	if len(valQuote) > 0 {
+		startIdx := len(valQuote)
+		pos := strings.LastIndex(line[startIdx:], valQuote)
+		// Check for multi-line value
+		if pos == -1 {
+			return p.readMultilines(line, line[startIdx:], valQuote)
+		}
+
+		return line[startIdx : pos+startIdx], nil
+	}
+
+	// Won't be able to reach here if value only contains whitespace
+	line = strings.TrimSpace(line)
+
+	// Check continuation lines when desired
+	if !ignoreContinuation && line[len(line)-1] == '\\' {
+		return p.readContinuationLines(line[:len(line)-1])
+	}
+
+	// Check if ignore inline comment
+	if !ignoreInlineComment {
+		i := strings.IndexAny(line, "#;")
+		if i > -1 {
+			p.comment.WriteString(line[i:])
+			line = strings.TrimSpace(line[:i])
+		}
+	}
+
+	// Trim single quotes
+	if hasSurroundedQuote(line, '\'') ||
+		hasSurroundedQuote(line, '"') {
+		line = line[1 : len(line)-1]
+	}
+	return line, nil
+}
+
+// parse parses data through an io.Reader.
+func (f *File) parse(reader io.Reader) (err error) {
+	p := newParser(reader)
+	if err = p.BOM(); err != nil {
+		return fmt.Errorf("BOM: %v", err)
+	}
+
+	// Ignore error because default section name is never empty string.
+	section, _ := f.NewSection(DEFAULT_SECTION)
+
+	var line []byte
+	var inUnparseableSection bool
+	for !p.isEOF {
+		line, err = p.readUntil('\n')
+		if err != nil {
+			return err
+		}
+
+		line = bytes.TrimLeftFunc(line, unicode.IsSpace)
+		if len(line) == 0 {
+			continue
+		}
+
+		// Comments
+		if line[0] == '#' || line[0] == ';' {
+			// Note: we do not care ending line break,
+			// it is needed for adding second line,
+			// so just clean it once at the end when set to value.
+			p.comment.Write(line)
+			continue
+		}
+
+		// Section
+		if line[0] == '[' {
+			// Read to the next ']' (TODO: support quoted strings)
+			// TODO(unknwon): use LastIndexByte when stop supporting Go1.4
+			closeIdx := bytes.LastIndex(line, []byte("]"))
+			if closeIdx == -1 {
+				return fmt.Errorf("unclosed section: %s", line)
+			}
+
+			name := string(line[1:closeIdx])
+			section, err = f.NewSection(name)
+			if err != nil {
+				return err
+			}
+
+			comment, has := cleanComment(line[closeIdx+1:])
+			if has {
+				p.comment.Write(comment)
+			}
+
+			section.Comment = strings.TrimSpace(p.comment.String())
+
+			// Reset aotu-counter and comments
+			p.comment.Reset()
+			p.count = 1
+
+			inUnparseableSection = false
+			for i := range f.options.UnparseableSections {
+				if f.options.UnparseableSections[i] == name ||
+					(f.options.Insensitive && strings.ToLower(f.options.UnparseableSections[i]) == strings.ToLower(name)) {
+					inUnparseableSection = true
+					continue
+				}
+			}
+			continue
+		}
+
+		if inUnparseableSection {
+			section.isRawSection = true
+			section.rawBody += string(line)
+			continue
+		}
+
+		kname, offset, err := readKeyName(line)
+		if err != nil {
+			// Treat as boolean key when desired, and whole line is key name.
+			if IsErrDelimiterNotFound(err) && f.options.AllowBooleanKeys {
+				kname, err := p.readValue(line, f.options.IgnoreContinuation, f.options.IgnoreInlineComment)
+				if err != nil {
+					return err
+				}
+				key, err := section.NewBooleanKey(kname)
+				if err != nil {
+					return err
+				}
+				key.Comment = strings.TrimSpace(p.comment.String())
+				p.comment.Reset()
+				continue
+			}
+			return err
+		}
+
+		// Auto increment.
+		isAutoIncr := false
+		if kname == "-" {
+			isAutoIncr = true
+			kname = "#" + strconv.Itoa(p.count)
+			p.count++
+		}
+
+		value, err := p.readValue(line[offset:], f.options.IgnoreContinuation, f.options.IgnoreInlineComment)
+		if err != nil {
+			return err
+		}
+
+		key, err := section.NewKey(kname, value)
+		if err != nil {
+			return err
+		}
+		key.isAutoIncrement = isAutoIncr
+		key.Comment = strings.TrimSpace(p.comment.String())
+		p.comment.Reset()
+	}
+	return nil
+}

vendor/github.com/go-ini/ini/parser_test.go

@@ -0,0 +1,42 @@
+// Copyright 2016 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func Test_BOM(t *testing.T) {
+	Convey("Test handling BOM", t, func() {
+		Convey("UTF-8-BOM", func() {
+			cfg, err := Load("testdata/UTF-8-BOM.ini")
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+
+			So(cfg.Section("author").Key("E-MAIL").String(), ShouldEqual, "u@gogs.io")
+		})
+
+		Convey("UTF-16-LE-BOM", func() {
+			cfg, err := Load("testdata/UTF-16-LE-BOM.ini")
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+		})
+
+		Convey("UTF-16-BE-BOM", func() {
+		})
+	})
+}

vendor/github.com/go-ini/ini/section.go

@@ -0,0 +1,248 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+// Section represents a config section.
+type Section struct {
+	f        *File
+	Comment  string
+	name     string
+	keys     map[string]*Key
+	keyList  []string
+	keysHash map[string]string
+
+	isRawSection bool
+	rawBody      string
+}
+
+func newSection(f *File, name string) *Section {
+	return &Section{
+		f:        f,
+		name:     name,
+		keys:     make(map[string]*Key),
+		keyList:  make([]string, 0, 10),
+		keysHash: make(map[string]string),
+	}
+}
+
+// Name returns name of Section.
+func (s *Section) Name() string {
+	return s.name
+}
+
+// Body returns rawBody of Section if the section was marked as unparseable.
+// It still follows the other rules of the INI format surrounding leading/trailing whitespace.
+func (s *Section) Body() string {
+	return strings.TrimSpace(s.rawBody)
+}
+
+// NewKey creates a new key to given section.
+func (s *Section) NewKey(name, val string) (*Key, error) {
+	if len(name) == 0 {
+		return nil, errors.New("error creating new key: empty key name")
+	} else if s.f.options.Insensitive {
+		name = strings.ToLower(name)
+	}
+
+	if s.f.BlockMode {
+		s.f.lock.Lock()
+		defer s.f.lock.Unlock()
+	}
+
+	if inSlice(name, s.keyList) {
+		if s.f.options.AllowShadows {
+			if err := s.keys[name].addShadow(val); err != nil {
+				return nil, err
+			}
+		} else {
+			s.keys[name].value = val
+		}
+		return s.keys[name], nil
+	}
+
+	s.keyList = append(s.keyList, name)
+	s.keys[name] = newKey(s, name, val)
+	s.keysHash[name] = val
+	return s.keys[name], nil
+}
+
+// NewBooleanKey creates a new boolean type key to given section.
+func (s *Section) NewBooleanKey(name string) (*Key, error) {
+	key, err := s.NewKey(name, "true")
+	if err != nil {
+		return nil, err
+	}
+
+	key.isBooleanType = true
+	return key, nil
+}
+
+// GetKey returns key in section by given name.
+func (s *Section) GetKey(name string) (*Key, error) {
+	// FIXME: change to section level lock?
+	if s.f.BlockMode {
+		s.f.lock.RLock()
+	}
+	if s.f.options.Insensitive {
+		name = strings.ToLower(name)
+	}
+	key := s.keys[name]
+	if s.f.BlockMode {
+		s.f.lock.RUnlock()
+	}
+
+	if key == nil {
+		// Check if it is a child-section.
+		sname := s.name
+		for {
+			if i := strings.LastIndex(sname, "."); i > -1 {
+				sname = sname[:i]
+				sec, err := s.f.GetSection(sname)
+				if err != nil {
+					continue
+				}
+				return sec.GetKey(name)
+			} else {
+				break
+			}
+		}
+		return nil, fmt.Errorf("error when getting key of section '%s': key '%s' not exists", s.name, name)
+	}
+	return key, nil
+}
+
+// HasKey returns true if section contains a key with given name.
+func (s *Section) HasKey(name string) bool {
+	key, _ := s.GetKey(name)
+	return key != nil
+}
+
+// Haskey is a backwards-compatible name for HasKey.
+func (s *Section) Haskey(name string) bool {
+	return s.HasKey(name)
+}
+
+// HasValue returns true if section contains given raw value.
+func (s *Section) HasValue(value string) bool {
+	if s.f.BlockMode {
+		s.f.lock.RLock()
+		defer s.f.lock.RUnlock()
+	}
+
+	for _, k := range s.keys {
+		if value == k.value {
+			return true
+		}
+	}
+	return false
+}
+
+// Key assumes named Key exists in section and returns a zero-value when not.
+func (s *Section) Key(name string) *Key {
+	key, err := s.GetKey(name)
+	if err != nil {
+		// It's OK here because the only possible error is empty key name,
+		// but if it's empty, this piece of code won't be executed.
+		key, _ = s.NewKey(name, "")
+		return key
+	}
+	return key
+}
+
+// Keys returns list of keys of section.
+func (s *Section) Keys() []*Key {
+	keys := make([]*Key, len(s.keyList))
+	for i := range s.keyList {
+		keys[i] = s.Key(s.keyList[i])
+	}
+	return keys
+}
+
+// ParentKeys returns list of keys of parent section.
+func (s *Section) ParentKeys() []*Key {
+	var parentKeys []*Key
+	sname := s.name
+	for {
+		if i := strings.LastIndex(sname, "."); i > -1 {
+			sname = sname[:i]
+			sec, err := s.f.GetSection(sname)
+			if err != nil {
+				continue
+			}
+			parentKeys = append(parentKeys, sec.Keys()...)
+		} else {
+			break
+		}
+
+	}
+	return parentKeys
+}
+
+// KeyStrings returns list of key names of section.
+func (s *Section) KeyStrings() []string {
+	list := make([]string, len(s.keyList))
+	copy(list, s.keyList)
+	return list
+}
+
+// KeysHash returns keys hash consisting of names and values.
+func (s *Section) KeysHash() map[string]string {
+	if s.f.BlockMode {
+		s.f.lock.RLock()
+		defer s.f.lock.RUnlock()
+	}
+
+	hash := map[string]string{}
+	for key, value := range s.keysHash {
+		hash[key] = value
+	}
+	return hash
+}
+
+// DeleteKey deletes a key from section.
+func (s *Section) DeleteKey(name string) {
+	if s.f.BlockMode {
+		s.f.lock.Lock()
+		defer s.f.lock.Unlock()
+	}
+
+	for i, k := range s.keyList {
+		if k == name {
+			s.keyList = append(s.keyList[:i], s.keyList[i+1:]...)
+			delete(s.keys, name)
+			return
+		}
+	}
+}
+
+// ChildSections returns a list of child sections of current section.
+// For example, "[parent.child1]" and "[parent.child12]" are child sections
+// of section "[parent]".
+func (s *Section) ChildSections() []*Section {
+	prefix := s.name + "."
+	children := make([]*Section, 0, 3)
+	for _, name := range s.f.sectionList {
+		if strings.HasPrefix(name, prefix) {
+			children = append(children, s.f.sections[name])
+		}
+	}
+	return children
+}

vendor/github.com/go-ini/ini/section_test.go

@@ -0,0 +1,75 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"strings"
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func Test_Section(t *testing.T) {
+	Convey("Test CRD sections", t, func() {
+		cfg, err := Load([]byte(_CONF_DATA), "testdata/conf.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		Convey("Get section strings", func() {
+			So(strings.Join(cfg.SectionStrings(), ","), ShouldEqual, "DEFAULT,author,package,package.sub,features,types,array,note,comments,advance")
+		})
+
+		Convey("Delete a section", func() {
+			cfg.DeleteSection("")
+			So(cfg.SectionStrings()[0], ShouldNotEqual, DEFAULT_SECTION)
+		})
+
+		Convey("Create new sections", func() {
+			cfg.NewSections("test", "test2")
+			_, err := cfg.GetSection("test")
+			So(err, ShouldBeNil)
+			_, err = cfg.GetSection("test2")
+			So(err, ShouldBeNil)
+		})
+	})
+}
+
+func Test_SectionRaw(t *testing.T) {
+	Convey("Test section raw string", t, func() {
+		cfg, err := LoadSources(
+			LoadOptions{
+				Insensitive: true,
+				UnparseableSections: []string{"core_lesson", "comments"},
+			},
+			"testdata/aicc.ini")
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		Convey("Get section strings", func() {
+			So(strings.Join(cfg.SectionStrings(), ","), ShouldEqual, "DEFAULT,core,core_lesson,comments")
+		})
+
+		Convey("Validate non-raw section", func() {
+			val, err := cfg.Section("core").GetKey("lesson_status")
+			So(err, ShouldBeNil)
+			So(val.String(), ShouldEqual, "C")
+		})
+
+		Convey("Validate raw section", func() {
+			So(cfg.Section("core_lesson").Body(), ShouldEqual, `my lesson state data – 1111111111111111111000000000000000001110000
+111111111111111111100000000000111000000000 – end my lesson state data`)
+		})
+	})
+}

vendor/github.com/go-ini/ini/struct.go

@@ -0,0 +1,450 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"reflect"
+	"strings"
+	"time"
+	"unicode"
+)
+
+// NameMapper represents a ini tag name mapper.
+type NameMapper func(string) string
+
+// Built-in name getters.
+var (
+	// AllCapsUnderscore converts to format ALL_CAPS_UNDERSCORE.
+	AllCapsUnderscore NameMapper = func(raw string) string {
+		newstr := make([]rune, 0, len(raw))
+		for i, chr := range raw {
+			if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
+				if i > 0 {
+					newstr = append(newstr, '_')
+				}
+			}
+			newstr = append(newstr, unicode.ToUpper(chr))
+		}
+		return string(newstr)
+	}
+	// TitleUnderscore converts to format title_underscore.
+	TitleUnderscore NameMapper = func(raw string) string {
+		newstr := make([]rune, 0, len(raw))
+		for i, chr := range raw {
+			if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
+				if i > 0 {
+					newstr = append(newstr, '_')
+				}
+				chr -= ('A' - 'a')
+			}
+			newstr = append(newstr, chr)
+		}
+		return string(newstr)
+	}
+)
+
+func (s *Section) parseFieldName(raw, actual string) string {
+	if len(actual) > 0 {
+		return actual
+	}
+	if s.f.NameMapper != nil {
+		return s.f.NameMapper(raw)
+	}
+	return raw
+}
+
+func parseDelim(actual string) string {
+	if len(actual) > 0 {
+		return actual
+	}
+	return ","
+}
+
+var reflectTime = reflect.TypeOf(time.Now()).Kind()
+
+// setSliceWithProperType sets proper values to slice based on its type.
+func setSliceWithProperType(key *Key, field reflect.Value, delim string, allowShadow bool) error {
+	var strs []string
+	if allowShadow {
+		strs = key.StringsWithShadows(delim)
+	} else {
+		strs = key.Strings(delim)
+	}
+
+	numVals := len(strs)
+	if numVals == 0 {
+		return nil
+	}
+
+	var vals interface{}
+
+	sliceOf := field.Type().Elem().Kind()
+	switch sliceOf {
+	case reflect.String:
+		vals = strs
+	case reflect.Int:
+		vals, _ = key.parseInts(strs, true, false)
+	case reflect.Int64:
+		vals, _ = key.parseInt64s(strs, true, false)
+	case reflect.Uint:
+		vals, _ = key.parseUints(strs, true, false)
+	case reflect.Uint64:
+		vals, _ = key.parseUint64s(strs, true, false)
+	case reflect.Float64:
+		vals, _ = key.parseFloat64s(strs, true, false)
+	case reflectTime:
+		vals, _ = key.parseTimesFormat(time.RFC3339, strs, true, false)
+	default:
+		return fmt.Errorf("unsupported type '[]%s'", sliceOf)
+	}
+
+	slice := reflect.MakeSlice(field.Type(), numVals, numVals)
+	for i := 0; i < numVals; i++ {
+		switch sliceOf {
+		case reflect.String:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]string)[i]))
+		case reflect.Int:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]int)[i]))
+		case reflect.Int64:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]int64)[i]))
+		case reflect.Uint:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]uint)[i]))
+		case reflect.Uint64:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]uint64)[i]))
+		case reflect.Float64:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]float64)[i]))
+		case reflectTime:
+			slice.Index(i).Set(reflect.ValueOf(vals.([]time.Time)[i]))
+		}
+	}
+	field.Set(slice)
+	return nil
+}
+
+// setWithProperType sets proper value to field based on its type,
+// but it does not return error for failing parsing,
+// because we want to use default value that is already assigned to strcut.
+func setWithProperType(t reflect.Type, key *Key, field reflect.Value, delim string, allowShadow bool) error {
+	switch t.Kind() {
+	case reflect.String:
+		if len(key.String()) == 0 {
+			return nil
+		}
+		field.SetString(key.String())
+	case reflect.Bool:
+		boolVal, err := key.Bool()
+		if err != nil {
+			return nil
+		}
+		field.SetBool(boolVal)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		durationVal, err := key.Duration()
+		// Skip zero value
+		if err == nil && int(durationVal) > 0 {
+			field.Set(reflect.ValueOf(durationVal))
+			return nil
+		}
+
+		intVal, err := key.Int64()
+		if err != nil || intVal == 0 {
+			return nil
+		}
+		field.SetInt(intVal)
+	//	byte is an alias for uint8, so supporting uint8 breaks support for byte
+	case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		durationVal, err := key.Duration()
+		// Skip zero value
+		if err == nil && int(durationVal) > 0 {
+			field.Set(reflect.ValueOf(durationVal))
+			return nil
+		}
+
+		uintVal, err := key.Uint64()
+		if err != nil {
+			return nil
+		}
+		field.SetUint(uintVal)
+
+	case reflect.Float32, reflect.Float64:
+		floatVal, err := key.Float64()
+		if err != nil {
+			return nil
+		}
+		field.SetFloat(floatVal)
+	case reflectTime:
+		timeVal, err := key.Time()
+		if err != nil {
+			return nil
+		}
+		field.Set(reflect.ValueOf(timeVal))
+	case reflect.Slice:
+		return setSliceWithProperType(key, field, delim, allowShadow)
+	default:
+		return fmt.Errorf("unsupported type '%s'", t)
+	}
+	return nil
+}
+
+func parseTagOptions(tag string) (rawName string, omitEmpty bool, allowShadow bool) {
+	opts := strings.SplitN(tag, ",", 3)
+	rawName = opts[0]
+	if len(opts) > 1 {
+		omitEmpty = opts[1] == "omitempty"
+	}
+	if len(opts) > 2 {
+		allowShadow = opts[2] == "allowshadow"
+	}
+	return rawName, omitEmpty, allowShadow
+}
+
+func (s *Section) mapTo(val reflect.Value) error {
+	if val.Kind() == reflect.Ptr {
+		val = val.Elem()
+	}
+	typ := val.Type()
+
+	for i := 0; i < typ.NumField(); i++ {
+		field := val.Field(i)
+		tpField := typ.Field(i)
+
+		tag := tpField.Tag.Get("ini")
+		if tag == "-" {
+			continue
+		}
+
+		rawName, _, allowShadow := parseTagOptions(tag)
+		fieldName := s.parseFieldName(tpField.Name, rawName)
+		if len(fieldName) == 0 || !field.CanSet() {
+			continue
+		}
+
+		isAnonymous := tpField.Type.Kind() == reflect.Ptr && tpField.Anonymous
+		isStruct := tpField.Type.Kind() == reflect.Struct
+		if isAnonymous {
+			field.Set(reflect.New(tpField.Type.Elem()))
+		}
+
+		if isAnonymous || isStruct {
+			if sec, err := s.f.GetSection(fieldName); err == nil {
+				if err = sec.mapTo(field); err != nil {
+					return fmt.Errorf("error mapping field(%s): %v", fieldName, err)
+				}
+				continue
+			}
+		}
+
+		if key, err := s.GetKey(fieldName); err == nil {
+			delim := parseDelim(tpField.Tag.Get("delim"))
+			if err = setWithProperType(tpField.Type, key, field, delim, allowShadow); err != nil {
+				return fmt.Errorf("error mapping field(%s): %v", fieldName, err)
+			}
+		}
+	}
+	return nil
+}
+
+// MapTo maps section to given struct.
+func (s *Section) MapTo(v interface{}) error {
+	typ := reflect.TypeOf(v)
+	val := reflect.ValueOf(v)
+	if typ.Kind() == reflect.Ptr {
+		typ = typ.Elem()
+		val = val.Elem()
+	} else {
+		return errors.New("cannot map to non-pointer struct")
+	}
+
+	return s.mapTo(val)
+}
+
+// MapTo maps file to given struct.
+func (f *File) MapTo(v interface{}) error {
+	return f.Section("").MapTo(v)
+}
+
+// MapTo maps data sources to given struct with name mapper.
+func MapToWithMapper(v interface{}, mapper NameMapper, source interface{}, others ...interface{}) error {
+	cfg, err := Load(source, others...)
+	if err != nil {
+		return err
+	}
+	cfg.NameMapper = mapper
+	return cfg.MapTo(v)
+}
+
+// MapTo maps data sources to given struct.
+func MapTo(v, source interface{}, others ...interface{}) error {
+	return MapToWithMapper(v, nil, source, others...)
+}
+
+// reflectSliceWithProperType does the opposite thing as setSliceWithProperType.
+func reflectSliceWithProperType(key *Key, field reflect.Value, delim string) error {
+	slice := field.Slice(0, field.Len())
+	if field.Len() == 0 {
+		return nil
+	}
+
+	var buf bytes.Buffer
+	sliceOf := field.Type().Elem().Kind()
+	for i := 0; i < field.Len(); i++ {
+		switch sliceOf {
+		case reflect.String:
+			buf.WriteString(slice.Index(i).String())
+		case reflect.Int, reflect.Int64:
+			buf.WriteString(fmt.Sprint(slice.Index(i).Int()))
+		case reflect.Uint, reflect.Uint64:
+			buf.WriteString(fmt.Sprint(slice.Index(i).Uint()))
+		case reflect.Float64:
+			buf.WriteString(fmt.Sprint(slice.Index(i).Float()))
+		case reflectTime:
+			buf.WriteString(slice.Index(i).Interface().(time.Time).Format(time.RFC3339))
+		default:
+			return fmt.Errorf("unsupported type '[]%s'", sliceOf)
+		}
+		buf.WriteString(delim)
+	}
+	key.SetValue(buf.String()[:buf.Len()-1])
+	return nil
+}
+
+// reflectWithProperType does the opposite thing as setWithProperType.
+func reflectWithProperType(t reflect.Type, key *Key, field reflect.Value, delim string) error {
+	switch t.Kind() {
+	case reflect.String:
+		key.SetValue(field.String())
+	case reflect.Bool:
+		key.SetValue(fmt.Sprint(field.Bool()))
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		key.SetValue(fmt.Sprint(field.Int()))
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		key.SetValue(fmt.Sprint(field.Uint()))
+	case reflect.Float32, reflect.Float64:
+		key.SetValue(fmt.Sprint(field.Float()))
+	case reflectTime:
+		key.SetValue(fmt.Sprint(field.Interface().(time.Time).Format(time.RFC3339)))
+	case reflect.Slice:
+		return reflectSliceWithProperType(key, field, delim)
+	default:
+		return fmt.Errorf("unsupported type '%s'", t)
+	}
+	return nil
+}
+
+// CR: copied from encoding/json/encode.go with modifications of time.Time support.
+// TODO: add more test coverage.
+func isEmptyValue(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflectTime:
+		return v.Interface().(time.Time).IsZero()
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	}
+	return false
+}
+
+func (s *Section) reflectFrom(val reflect.Value) error {
+	if val.Kind() == reflect.Ptr {
+		val = val.Elem()
+	}
+	typ := val.Type()
+
+	for i := 0; i < typ.NumField(); i++ {
+		field := val.Field(i)
+		tpField := typ.Field(i)
+
+		tag := tpField.Tag.Get("ini")
+		if tag == "-" {
+			continue
+		}
+
+		opts := strings.SplitN(tag, ",", 2)
+		if len(opts) == 2 && opts[1] == "omitempty" && isEmptyValue(field) {
+			continue
+		}
+
+		fieldName := s.parseFieldName(tpField.Name, opts[0])
+		if len(fieldName) == 0 || !field.CanSet() {
+			continue
+		}
+
+		if (tpField.Type.Kind() == reflect.Ptr && tpField.Anonymous) ||
+			(tpField.Type.Kind() == reflect.Struct && tpField.Type.Name() != "Time") {
+			// Note: The only error here is section doesn't exist.
+			sec, err := s.f.GetSection(fieldName)
+			if err != nil {
+				// Note: fieldName can never be empty here, ignore error.
+				sec, _ = s.f.NewSection(fieldName)
+			}
+			if err = sec.reflectFrom(field); err != nil {
+				return fmt.Errorf("error reflecting field (%s): %v", fieldName, err)
+			}
+			continue
+		}
+
+		// Note: Same reason as secion.
+		key, err := s.GetKey(fieldName)
+		if err != nil {
+			key, _ = s.NewKey(fieldName, "")
+		}
+		if err = reflectWithProperType(tpField.Type, key, field, parseDelim(tpField.Tag.Get("delim"))); err != nil {
+			return fmt.Errorf("error reflecting field (%s): %v", fieldName, err)
+		}
+
+	}
+	return nil
+}
+
+// ReflectFrom reflects secion from given struct.
+func (s *Section) ReflectFrom(v interface{}) error {
+	typ := reflect.TypeOf(v)
+	val := reflect.ValueOf(v)
+	if typ.Kind() == reflect.Ptr {
+		typ = typ.Elem()
+		val = val.Elem()
+	} else {
+		return errors.New("cannot reflect from non-pointer struct")
+	}
+
+	return s.reflectFrom(val)
+}
+
+// ReflectFrom reflects file from given struct.
+func (f *File) ReflectFrom(v interface{}) error {
+	return f.Section("").ReflectFrom(v)
+}
+
+// ReflectFrom reflects data sources from given struct with name mapper.
+func ReflectFromWithMapper(cfg *File, v interface{}, mapper NameMapper) error {
+	cfg.NameMapper = mapper
+	return cfg.ReflectFrom(v)
+}
+
+// ReflectFrom reflects data sources from given struct.
+func ReflectFrom(cfg *File, v interface{}) error {
+	return ReflectFromWithMapper(cfg, v, nil)
+}

vendor/github.com/go-ini/ini/struct_test.go

@@ -0,0 +1,337 @@
+// Copyright 2014 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+type testNested struct {
+	Cities      []string `delim:"|"`
+	Visits      []time.Time
+	Years       []int
+	Numbers     []int64
+	Ages        []uint
+	Populations []uint64
+	Coordinates []float64
+	Note        string
+	Unused      int `ini:"-"`
+}
+
+type testEmbeded struct {
+	GPA float64
+}
+
+type testStruct struct {
+	Name         string `ini:"NAME"`
+	Age          int
+	Male         bool
+	Money        float64
+	Born         time.Time
+	Time         time.Duration `ini:"Duration"`
+	Others       testNested
+	*testEmbeded `ini:"grade"`
+	Unused       int `ini:"-"`
+	Unsigned     uint
+	Omitted      bool     `ini:"omitthis,omitempty"`
+	Shadows      []string `ini:",,allowshadow"`
+	ShadowInts   []int    `ini:"Shadows,,allowshadow"`
+}
+
+const _CONF_DATA_STRUCT = `
+NAME = Unknwon
+Age = 21
+Male = true
+Money = 1.25
+Born = 1993-10-07T20:17:05Z
+Duration = 2h45m
+Unsigned = 3
+omitthis = true
+Shadows = 1, 2
+Shadows = 3, 4
+
+[Others]
+Cities = HangZhou|Boston
+Visits = 1993-10-07T20:17:05Z, 1993-10-07T20:17:05Z
+Years = 1993,1994
+Numbers = 10010,10086
+Ages = 18,19
+Populations = 12345678,98765432
+Coordinates = 192.168,10.11
+Note = Hello world!
+
+[grade]
+GPA = 2.8
+
+[foo.bar]
+Here = there
+When = then
+`
+
+type unsupport struct {
+	Byte byte
+}
+
+type unsupport2 struct {
+	Others struct {
+		Cities byte
+	}
+}
+
+type unsupport3 struct {
+	Cities byte
+}
+
+type unsupport4 struct {
+	*unsupport3 `ini:"Others"`
+}
+
+type defaultValue struct {
+	Name   string
+	Age    int
+	Male   bool
+	Money  float64
+	Born   time.Time
+	Cities []string
+}
+
+type fooBar struct {
+	Here, When string
+}
+
+const _INVALID_DATA_CONF_STRUCT = `
+Name = 
+Age = age
+Male = 123
+Money = money
+Born = nil
+Cities = 
+`
+
+func Test_Struct(t *testing.T) {
+	Convey("Map to struct", t, func() {
+		Convey("Map file to struct", func() {
+			ts := new(testStruct)
+			So(MapTo(ts, []byte(_CONF_DATA_STRUCT)), ShouldBeNil)
+
+			So(ts.Name, ShouldEqual, "Unknwon")
+			So(ts.Age, ShouldEqual, 21)
+			So(ts.Male, ShouldBeTrue)
+			So(ts.Money, ShouldEqual, 1.25)
+			So(ts.Unsigned, ShouldEqual, 3)
+
+			t, err := time.Parse(time.RFC3339, "1993-10-07T20:17:05Z")
+			So(err, ShouldBeNil)
+			So(ts.Born.String(), ShouldEqual, t.String())
+
+			dur, err := time.ParseDuration("2h45m")
+			So(err, ShouldBeNil)
+			So(ts.Time.Seconds(), ShouldEqual, dur.Seconds())
+
+			So(strings.Join(ts.Others.Cities, ","), ShouldEqual, "HangZhou,Boston")
+			So(ts.Others.Visits[0].String(), ShouldEqual, t.String())
+			So(fmt.Sprint(ts.Others.Years), ShouldEqual, "[1993 1994]")
+			So(fmt.Sprint(ts.Others.Numbers), ShouldEqual, "[10010 10086]")
+			So(fmt.Sprint(ts.Others.Ages), ShouldEqual, "[18 19]")
+			So(fmt.Sprint(ts.Others.Populations), ShouldEqual, "[12345678 98765432]")
+			So(fmt.Sprint(ts.Others.Coordinates), ShouldEqual, "[192.168 10.11]")
+			So(ts.Others.Note, ShouldEqual, "Hello world!")
+			So(ts.testEmbeded.GPA, ShouldEqual, 2.8)
+		})
+
+		Convey("Map section to struct", func() {
+			foobar := new(fooBar)
+			f, err := Load([]byte(_CONF_DATA_STRUCT))
+			So(err, ShouldBeNil)
+
+			So(f.Section("foo.bar").MapTo(foobar), ShouldBeNil)
+			So(foobar.Here, ShouldEqual, "there")
+			So(foobar.When, ShouldEqual, "then")
+		})
+
+		Convey("Map to non-pointer struct", func() {
+			cfg, err := Load([]byte(_CONF_DATA_STRUCT))
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+
+			So(cfg.MapTo(testStruct{}), ShouldNotBeNil)
+		})
+
+		Convey("Map to unsupported type", func() {
+			cfg, err := Load([]byte(_CONF_DATA_STRUCT))
+			So(err, ShouldBeNil)
+			So(cfg, ShouldNotBeNil)
+
+			cfg.NameMapper = func(raw string) string {
+				if raw == "Byte" {
+					return "NAME"
+				}
+				return raw
+			}
+			So(cfg.MapTo(&unsupport{}), ShouldNotBeNil)
+			So(cfg.MapTo(&unsupport2{}), ShouldNotBeNil)
+			So(cfg.MapTo(&unsupport4{}), ShouldNotBeNil)
+		})
+
+		Convey("Map to omitempty field", func() {
+			ts := new(testStruct)
+			So(MapTo(ts, []byte(_CONF_DATA_STRUCT)), ShouldBeNil)
+
+			So(ts.Omitted, ShouldEqual, true)
+		})
+
+		Convey("Map with shadows", func() {
+			cfg, err := LoadSources(LoadOptions{AllowShadows: true}, []byte(_CONF_DATA_STRUCT))
+			So(err, ShouldBeNil)
+			ts := new(testStruct)
+			So(cfg.MapTo(ts), ShouldBeNil)
+
+			So(strings.Join(ts.Shadows, " "), ShouldEqual, "1 2 3 4")
+			So(fmt.Sprintf("%v", ts.ShadowInts), ShouldEqual, "[1 2 3 4]")
+		})
+
+		Convey("Map from invalid data source", func() {
+			So(MapTo(&testStruct{}, "hi"), ShouldNotBeNil)
+		})
+
+		Convey("Map to wrong types and gain default values", func() {
+			cfg, err := Load([]byte(_INVALID_DATA_CONF_STRUCT))
+			So(err, ShouldBeNil)
+
+			t, err := time.Parse(time.RFC3339, "1993-10-07T20:17:05Z")
+			So(err, ShouldBeNil)
+			dv := &defaultValue{"Joe", 10, true, 1.25, t, []string{"HangZhou", "Boston"}}
+			So(cfg.MapTo(dv), ShouldBeNil)
+			So(dv.Name, ShouldEqual, "Joe")
+			So(dv.Age, ShouldEqual, 10)
+			So(dv.Male, ShouldBeTrue)
+			So(dv.Money, ShouldEqual, 1.25)
+			So(dv.Born.String(), ShouldEqual, t.String())
+			So(strings.Join(dv.Cities, ","), ShouldEqual, "HangZhou,Boston")
+		})
+	})
+
+	Convey("Reflect from struct", t, func() {
+		type Embeded struct {
+			Dates       []time.Time `delim:"|"`
+			Places      []string
+			Years       []int
+			Numbers     []int64
+			Ages        []uint
+			Populations []uint64
+			Coordinates []float64
+			None        []int
+		}
+		type Author struct {
+			Name      string `ini:"NAME"`
+			Male      bool
+			Age       int
+			Height    uint
+			GPA       float64
+			Date      time.Time
+			NeverMind string `ini:"-"`
+			*Embeded  `ini:"infos"`
+		}
+
+		t, err := time.Parse(time.RFC3339, "1993-10-07T20:17:05Z")
+		So(err, ShouldBeNil)
+		a := &Author{"Unknwon", true, 21, 100, 2.8, t, "",
+			&Embeded{
+				[]time.Time{t, t},
+				[]string{"HangZhou", "Boston"},
+				[]int{1993, 1994},
+				[]int64{10010, 10086},
+				[]uint{18, 19},
+				[]uint64{12345678, 98765432},
+				[]float64{192.168, 10.11},
+				[]int{},
+			}}
+		cfg := Empty()
+		So(ReflectFrom(cfg, a), ShouldBeNil)
+
+		var buf bytes.Buffer
+		_, err = cfg.WriteTo(&buf)
+		So(err, ShouldBeNil)
+		So(buf.String(), ShouldEqual, `NAME   = Unknwon
+Male   = true
+Age    = 21
+Height = 100
+GPA    = 2.8
+Date   = 1993-10-07T20:17:05Z
+
+[infos]
+Dates       = 1993-10-07T20:17:05Z|1993-10-07T20:17:05Z
+Places      = HangZhou,Boston
+Years       = 1993,1994
+Numbers     = 10010,10086
+Ages        = 18,19
+Populations = 12345678,98765432
+Coordinates = 192.168,10.11
+None        = 
+
+`)
+
+		Convey("Reflect from non-point struct", func() {
+			So(ReflectFrom(cfg, Author{}), ShouldNotBeNil)
+		})
+
+		Convey("Reflect from struct with omitempty", func() {
+			cfg := Empty()
+			type SpecialStruct struct {
+				FirstName  string    `ini:"first_name"`
+				LastName   string    `ini:"last_name"`
+				JustOmitMe string    `ini:"omitempty"`
+				LastLogin  time.Time `ini:"last_login,omitempty"`
+				LastLogin2 time.Time `ini:",omitempty"`
+				NotEmpty   int       `ini:"omitempty"`
+			}
+
+			So(ReflectFrom(cfg, &SpecialStruct{FirstName: "John", LastName: "Doe", NotEmpty: 9}), ShouldBeNil)
+
+			var buf bytes.Buffer
+			_, err = cfg.WriteTo(&buf)
+			So(buf.String(), ShouldEqual, `first_name = John
+last_name  = Doe
+omitempty  = 9
+
+`)
+		})
+	})
+}
+
+type testMapper struct {
+	PackageName string
+}
+
+func Test_NameGetter(t *testing.T) {
+	Convey("Test name mappers", t, func() {
+		So(MapToWithMapper(&testMapper{}, TitleUnderscore, []byte("packag_name=ini")), ShouldBeNil)
+
+		cfg, err := Load([]byte("PACKAGE_NAME=ini"))
+		So(err, ShouldBeNil)
+		So(cfg, ShouldNotBeNil)
+
+		cfg.NameMapper = AllCapsUnderscore
+		tg := new(testMapper)
+		So(cfg.MapTo(tg), ShouldBeNil)
+		So(tg.PackageName, ShouldEqual, "ini")
+	})
+}

vendor/github.com/go-ini/ini/testdata/UTF-8-BOM.ini

@@ -0,0 +1,2 @@
+[author]
+E-MAIL = u@gogs.io

vendor/github.com/go-ini/ini/testdata/aicc.ini

@@ -0,0 +1,11 @@
+[Core]
+  Lesson_Location = 87
+Lesson_Status = C
+    Score = 3
+Time = 00:02:30
+
+[CORE_LESSON]
+my lesson state data – 1111111111111111111000000000000000001110000
+111111111111111111100000000000111000000000 – end my lesson state data
+[COMMENTS]
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>

vendor/github.com/go-ini/ini/testdata/conf.ini

@@ -0,0 +1,2 @@
+[author]
+E-MAIL = u@gogs.io

vendor/github.com/gorilla/mux/README.md

@@ -24,9 +24,9 @@ The name mux stands for "HTTP request multiplexer". Like the standard `http.Serv
 * [Install](#install)
 * [Examples](#examples)
 * [Matching Routes](#matching-routes)
-* [Listing Routes](#listing-routes)
 * [Static Files](#static-files)
 * [Registered URLs](#registered-urls)
+* [Walking Routes](#walking-routes)
 * [Full Example](#full-example)
 
 ---
@@ -168,7 +168,6 @@ s.HandleFunc("/{key}/", ProductHandler)
 // "/products/{key}/details"
 s.HandleFunc("/{key}/details", ProductDetailsHandler)
 ```
-
 ### Listing Routes
 
 Routes on a mux can be listed using the Router.Walk method—useful for generating documentation:
@@ -191,9 +190,9 @@ func handler(w http.ResponseWriter, r *http.Request) {
 func main() {
     r := mux.NewRouter()
     r.HandleFunc("/", handler)
-    r.Methods("POST").HandleFunc("/products", handler)
+    r.HandleFunc("/products", handler).Methods("POST")
-    r.Methods("GET").HandleFunc("/articles", handler)
+    r.HandleFunc("/articles", handler).Methods("GET")
-    r.Methods("GET", "PUT").HandleFunc("/articles/{id}", handler)
+    r.HandleFunc("/articles/{id}", handler).Methods("GET", "PUT")
     r.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error {
         t, err := route.GetPathTemplate()
         if err != nil {
@@ -319,6 +318,37 @@ url, err := r.Get("article").URL("subdomain", "news",
                                  "id", "42")
 ```
 
+### Walking Routes
+
+The `Walk` function on `mux.Router` can be used to visit all of the routes that are registered on a router. For example,
+the following prints all of the registered routes:
+
+```go
+r := mux.NewRouter()
+r.HandleFunc("/", handler)
+r.HandleFunc("/products", handler).Methods("POST")
+r.HandleFunc("/articles", handler).Methods("GET")
+r.HandleFunc("/articles/{id}", handler).Methods("GET", "PUT")
+r.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error {
+    t, err := route.GetPathTemplate()
+    if err != nil {
+        return err
+    }
+    // p will contain a regular expression that is compatible with regular expressions in Perl, Python, and other languages.
+    // For example, the regular expression for path '/articles/{id}' will be '^/articles/(?P<v0>[^/]+)$'.
+    p, err := route.GetPathRegexp()
+    if err != nil {
+        return err
+    }
+    m, err := route.GetMethods()
+    if err != nil {
+        return err
+    }
+    fmt.Println(strings.Join(m, ","), t, p)
+    return nil
+})
+```
+
 ## Full Example
 
 Here's a complete, runnable example of a small `mux` based server:

vendor/github.com/gorilla/mux/mux.go

@@ -299,10 +299,6 @@ type WalkFunc func(route *Route, router *Router, ancestors []*Route) error
 
 func (r *Router) walk(walkFn WalkFunc, ancestors []*Route) error {
 	for _, t := range r.routes {
-		if t.regexp == nil || t.regexp.path == nil || t.regexp.path.template == "" {
-			continue
-		}
-
 		err := walkFn(t, r, ancestors)
 		if err == SkipRouter {
 			continue
@@ -312,10 +308,12 @@ func (r *Router) walk(walkFn WalkFunc, ancestors []*Route) error {
 		}
 		for _, sr := range t.matchers {
 			if h, ok := sr.(*Router); ok {
+				ancestors = append(ancestors, t)
 				err := h.walk(walkFn, ancestors)
 				if err != nil {
 					return err
 				}
+				ancestors = ancestors[:len(ancestors)-1]
 			}
 		}
 		if h, ok := t.handler.(*Router); ok {

vendor/github.com/gorilla/mux/mux_test.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"reflect"
 	"strings"
 	"testing"
 )
@@ -1382,11 +1383,55 @@ func TestWalkNested(t *testing.T) {
 	l2 := l1.PathPrefix("/l").Subrouter()
 	l2.Path("/a")
 
-	paths := []string{"/g", "/g/o", "/g/o/r", "/g/o/r/i", "/g/o/r/i/l", "/g/o/r/i/l/l", "/g/o/r/i/l/l/a"}
+	testCases := []struct {
+		path      string
+		ancestors []*Route
+	}{
+		{"/g", []*Route{}},
+		{"/g/o", []*Route{g.parent.(*Route)}},
+		{"/g/o/r", []*Route{g.parent.(*Route), o.parent.(*Route)}},
+		{"/g/o/r/i", []*Route{g.parent.(*Route), o.parent.(*Route), r.parent.(*Route)}},
+		{"/g/o/r/i/l", []*Route{g.parent.(*Route), o.parent.(*Route), r.parent.(*Route), i.parent.(*Route)}},
+		{"/g/o/r/i/l/l", []*Route{g.parent.(*Route), o.parent.(*Route), r.parent.(*Route), i.parent.(*Route), l1.parent.(*Route)}},
+		{"/g/o/r/i/l/l/a", []*Route{g.parent.(*Route), o.parent.(*Route), r.parent.(*Route), i.parent.(*Route), l1.parent.(*Route), l2.parent.(*Route)}},
+	}
+
+	idx := 0
+	err := router.Walk(func(route *Route, router *Router, ancestors []*Route) error {
+		path := testCases[idx].path
+		tpl := route.regexp.path.template
+		if tpl != path {
+			t.Errorf(`Expected %s got %s`, path, tpl)
+		}
+		currWantAncestors := testCases[idx].ancestors
+		if !reflect.DeepEqual(currWantAncestors, ancestors) {
+			t.Errorf(`Expected %+v got %+v`, currWantAncestors, ancestors)
+		}
+		idx++
+		return nil
+	})
+	if err != nil {
+		panic(err)
+	}
+	if idx != len(testCases) {
+		t.Errorf("Expected %d routes, found %d", len(testCases), idx)
+	}
+}
+
+func TestWalkSubrouters(t *testing.T) {
+	router := NewRouter()
+
+	g := router.Path("/g").Subrouter()
+	o := g.PathPrefix("/o").Subrouter()
+	o.Methods("GET")
+	o.Methods("PUT")
+
+	// all 4 routes should be matched, but final 2 routes do not have path templates
+	paths := []string{"/g", "/g/o", "", ""}
 	idx := 0
 	err := router.Walk(func(route *Route, router *Router, ancestors []*Route) error {
 		path := paths[idx]
-		tpl := route.regexp.path.template
+		tpl, _ := route.GetPathTemplate()
 		if tpl != path {
 			t.Errorf(`Expected %s got %s`, path, tpl)
 		}

vendor/github.com/mastertinner/adapters/oauth2/Gopkg.lock

@@ -4,13 +4,13 @@ memo = "3f23568a8640e61d2e21220dfffbc576be6b4e6b60ad494b31a30c6372e7cd91"
   branch = "master"
   name = "github.com/golang/protobuf"
   packages = ["proto"]
-  revision = "fec3b39b059c0f88fa6b20f5ed012b1aa203a8b4"
+  revision = "7a211bcf3bce0e3f1d74f9894916e6f116ae83b4"
 
 [[projects]]
   branch = "master"
   name = "github.com/mastertinner/adapters"
   packages = ["."]
-  revision = "2eb26aa885e02b2abe979da3c5efd9cfe9a08d58"
+  revision = "b7852c480132eb2565591fdb1b6738aa0bdcc9c9"
 
 [[projects]]
   name = "github.com/satori/go.uuid"
@@ -22,7 +22,7 @@ memo = "3f23568a8640e61d2e21220dfffbc576be6b4e6b60ad494b31a30c6372e7cd91"
   branch = "master"
   name = "golang.org/x/net"
   packages = ["context"]
-  revision = "513929065c19401a1c7b76ecd942f9f86a0c061b"
+  revision = "5961165da77ad3a2abf3a77ea904c13a76b0b073"
 
 [[projects]]
   branch = "master"

vendor/github.com/minio/go-homedir/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Mitchell Hashimoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/minio/go-homedir/README.md

@@ -0,0 +1,16 @@
+# go-homedir
+
+This is a Go library for detecting the user's home directory without
+the use of cgo, so the library can be used in cross-compilation environments.
+
+Usage is incredibly simple, just call `homedir.Dir()` to get the home directory
+for a user, and `homedir.Expand()` to expand the `~` in a path to the home
+directory.
+
+**Why not just use `os/user`?** The built-in `os/user` package is not
+available on certain architectures such as i386 or PNaCl. Additionally
+it has a cgo dependency on Darwin systems. This means that any Go code
+that uses that package cannot cross compile. But 99% of the time the
+use for `os/user` is just to retrieve the home directory, which we can
+do for the current user without cgo. This library does that, enabling
+cross-compilation. 

vendor/github.com/minio/go-homedir/dir_posix.go

@@ -0,0 +1,64 @@
+// +build !windows
+
+// Copyright 2016 (C) Mitchell Hashimoto
+// Distributed under the MIT License.
+
+package homedir
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"os/exec"
+	"os/user"
+	"strconv"
+	"strings"
+)
+
+// dir returns the homedir of current user for all POSIX compatible
+// operating systems.
+func dir() (string, error) {
+	// First prefer the HOME environmental variable
+	if home := os.Getenv("HOME"); home != "" {
+		return home, nil
+	}
+
+	// user.Current is not implemented for i386 and PNaCL like environments.
+	if currUser, err := user.Current(); err == nil {
+		return currUser.HomeDir, nil
+	}
+
+	// If that fails, try getent
+	var stdout bytes.Buffer
+	cmd := exec.Command("getent", "passwd", strconv.Itoa(os.Getuid()))
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		// If "getent" is missing, ignore it
+		if err != exec.ErrNotFound {
+			return "", err
+		}
+	} else {
+		if passwd := strings.TrimSpace(stdout.String()); passwd != "" {
+			// username:password:uid:gid:gecos:home:shell
+			passwdParts := strings.SplitN(passwd, ":", 7)
+			if len(passwdParts) > 5 {
+				return passwdParts[5], nil
+			}
+		}
+	}
+
+	// If all else fails, try the shell
+	stdout.Reset()
+	cmd = exec.Command("sh", "-c", "cd && pwd")
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return "", err
+	}
+
+	result := strings.TrimSpace(stdout.String())
+	if result == "" {
+		return "", errors.New("blank output when reading home directory")
+	}
+
+	return result, nil
+}

vendor/github.com/minio/go-homedir/dir_windows.go

@@ -0,0 +1,28 @@
+// Copyright 2016 (C) Mitchell Hashimoto
+// Distributed under the MIT License.
+
+package homedir
+
+import (
+	"errors"
+	"os"
+)
+
+// dir returns the homedir of current user for MS Windows OS.
+func dir() (string, error) {
+	// First prefer the HOME environmental variable
+	if home := os.Getenv("HOME"); home != "" {
+		return home, nil
+	}
+	drive := os.Getenv("HOMEDRIVE")
+	path := os.Getenv("HOMEPATH")
+	home := drive + path
+	if drive == "" || path == "" {
+		home = os.Getenv("USERPROFILE")
+	}
+	if home == "" {
+		return "", errors.New("HOMEDRIVE, HOMEPATH, and USERPROFILE are blank")
+	}
+
+	return home, nil
+}

vendor/github.com/minio/go-homedir/homedir.go

@@ -0,0 +1,68 @@
+// Copyright 2016 (C) Mitchell Hashimoto
+// Distributed under the MIT License.
+
+// Package homedir implements a portable function to determine current user's homedir.
+package homedir
+
+import (
+	"errors"
+	"path/filepath"
+	"sync"
+)
+
+// DisableCache will disable caching of the home directory. Caching is enabled
+// by default.
+var DisableCache bool
+
+var homedirCache string
+var cacheLock sync.Mutex
+
+// Dir returns the home directory for the executing user.
+//
+// This uses an OS-specific method for discovering the home directory.
+// An error is returned if a home directory cannot be detected.
+func Dir() (string, error) {
+	cacheLock.Lock()
+	defer cacheLock.Unlock()
+
+	// Return cached homedir if available.
+	if !DisableCache {
+		if homedirCache != "" {
+			return homedirCache, nil
+		}
+	}
+
+	// Determine OS speific current homedir.
+	result, err := dir()
+	if err != nil {
+		return "", err
+	}
+
+	// Cache for future lookups.
+	homedirCache = result
+	return result, nil
+}
+
+// Expand expands the path to include the home directory if the path
+// is prefixed with `~`. If it isn't prefixed with `~`, the path is
+// returned as-is.
+func Expand(path string) (string, error) {
+	if len(path) == 0 {
+		return path, nil
+	}
+
+	if path[0] != '~' {
+		return path, nil
+	}
+
+	if len(path) > 1 && path[1] != '/' && path[1] != '\\' {
+		return "", errors.New("cannot expand user-specific home dir")
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(dir, path[1:]), nil
+}

vendor/github.com/minio/go-homedir/homedir_test.go

@@ -0,0 +1,114 @@
+package homedir
+
+import (
+	"os"
+	"os/user"
+	"path/filepath"
+	"testing"
+)
+
+func patchEnv(key, value string) func() {
+	bck := os.Getenv(key)
+	deferFunc := func() {
+		os.Setenv(key, bck)
+	}
+
+	os.Setenv(key, value)
+	return deferFunc
+}
+
+func BenchmarkDir(b *testing.B) {
+	// We do this for any "warmups"
+	for i := 0; i < 10; i++ {
+		Dir()
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		Dir()
+	}
+}
+
+func TestDir(t *testing.T) {
+	// NOTE: This test is not portable. If user.Current() worked
+	// everywhere, we wouldn't need our package in the first place.
+	u, err := user.Current()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	dir, err := Dir()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if u.HomeDir != dir {
+		t.Fatalf("%#v != %#v", u.HomeDir, dir)
+	}
+}
+
+func TestExpand(t *testing.T) {
+	u, err := user.Current()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	cases := []struct {
+		Input  string
+		Output string
+		Err    bool
+	}{
+		{
+			"/foo",
+			"/foo",
+			false,
+		},
+
+		{
+			"~/foo",
+			filepath.Join(u.HomeDir, "foo"),
+			false,
+		},
+
+		{
+			"",
+			"",
+			false,
+		},
+
+		{
+			"~",
+			u.HomeDir,
+			false,
+		},
+
+		{
+			"~foo/foo",
+			"",
+			true,
+		},
+	}
+
+	for _, tc := range cases {
+		actual, err := Expand(tc.Input)
+		if (err != nil) != tc.Err {
+			t.Fatalf("Input: %#v\n\nErr: %s", tc.Input, err)
+		}
+
+		if actual != tc.Output {
+			t.Fatalf("Input: %#v\n\nOutput: %#v", tc.Input, actual)
+		}
+	}
+
+	DisableCache = true
+	defer func() { DisableCache = false }()
+	defer patchEnv("HOME", "/custom/path/")()
+	expected := filepath.Join("/", "custom", "path", "foo/bar")
+	actual, err := Expand("~/foo/bar")
+
+	if err != nil {
+		t.Errorf("No error is expected, got: %v", err)
+	} else if actual != expected {
+		t.Errorf("Expected: %v; actual: %v", expected, actual)
+	}
+}

vendor/github.com/minio/minio-go/api-presigned.go

@@ -122,21 +122,38 @@ func (c Client) PresignedPostPolicy(p *PostPolicy) (u *url.URL, formData map[str
 		return nil, nil, err
 	}
 
+	// Get credentials from the configured credentials provider.
+	credValues, err := c.credsProvider.Get()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var (
+		signerType      = credValues.SignerType
+		sessionToken    = credValues.SessionToken
+		accessKeyID     = credValues.AccessKeyID
+		secretAccessKey = credValues.SecretAccessKey
+	)
+
+	if signerType.IsAnonymous() {
+		return nil, nil, ErrInvalidArgument("Presigned operations are not supported for anonymous credentials")
+	}
+
 	// Keep time.
 	t := time.Now().UTC()
 	// For signature version '2' handle here.
-	if c.signature.isV2() {
+	if signerType.IsV2() {
 		policyBase64 := p.base64()
 		p.formData["policy"] = policyBase64
 		// For Google endpoint set this value to be 'GoogleAccessId'.
 		if s3utils.IsGoogleEndpoint(c.endpointURL) {
-			p.formData["GoogleAccessId"] = c.accessKeyID
+			p.formData["GoogleAccessId"] = accessKeyID
 		} else {
 			// For all other endpoints set this value to be 'AWSAccessKeyId'.
-			p.formData["AWSAccessKeyId"] = c.accessKeyID
+			p.formData["AWSAccessKeyId"] = accessKeyID
 		}
 		// Sign the policy.
-		p.formData["signature"] = s3signer.PostPresignSignatureV2(policyBase64, c.secretAccessKey)
+		p.formData["signature"] = s3signer.PostPresignSignatureV2(policyBase64, secretAccessKey)
 		return u, p.formData, nil
 	}
 
@@ -159,7 +176,7 @@ func (c Client) PresignedPostPolicy(p *PostPolicy) (u *url.URL, formData map[str
 	}
 
 	// Add a credential policy.
-	credential := s3signer.GetCredential(c.accessKeyID, location, t)
+	credential := s3signer.GetCredential(accessKeyID, location, t)
 	if err = p.addNewPolicy(policyCondition{
 		matchType: "eq",
 		condition: "$x-amz-credential",
@@ -168,13 +185,27 @@ func (c Client) PresignedPostPolicy(p *PostPolicy) (u *url.URL, formData map[str
 		return nil, nil, err
 	}
 
+	if sessionToken != "" {
+		if err = p.addNewPolicy(policyCondition{
+			matchType: "eq",
+			condition: "$x-amz-security-token",
+			value:     sessionToken,
+		}); err != nil {
+			return nil, nil, err
+		}
+	}
+
 	// Get base64 encoded policy.
 	policyBase64 := p.base64()
+
 	// Fill in the form data.
 	p.formData["policy"] = policyBase64
 	p.formData["x-amz-algorithm"] = signV4Algorithm
 	p.formData["x-amz-credential"] = credential
 	p.formData["x-amz-date"] = t.Format(iso8601DateFormat)
-	p.formData["x-amz-signature"] = s3signer.PostPresignSignatureV4(policyBase64, t, c.secretAccessKey, location)
+	if sessionToken != "" {
+		p.formData["x-amz-security-token"] = sessionToken
+	}
+	p.formData["x-amz-signature"] = s3signer.PostPresignSignatureV4(policyBase64, t, secretAccessKey, location)
 	return u, p.formData, nil
 }

vendor/github.com/minio/minio-go/api-put-bucket.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,6 +29,7 @@ import (
 	"net/url"
 	"path"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/policy"
 	"github.com/minio/minio-go/pkg/s3signer"
 )
@@ -89,7 +91,7 @@ func (c Client) MakeBucket(bucketName string, location string) (err error) {
 		if resp.StatusCode != http.StatusOK {
 			err := httpRespToErrorResponse(resp, bucketName, "")
 			errResp := ToErrorResponse(err)
-			if errResp.Code == "InvalidRegion" && errResp.Region != "" {
+			if resp.StatusCode == http.StatusBadRequest && errResp.Region != "" {
 				// Fetch bucket region found in headers
 				// of S3 error response, attempt bucket
 				// create again.
@@ -135,9 +137,32 @@ func (c Client) makeBucketRequest(bucketName string, location string) (*http.Req
 	// set UserAgent for the request.
 	c.setUserAgent(req)
 
-	// set sha256 sum for signature calculation only with
+	// Get credentials from the configured credentials provider.
-	// signature version '4'.
+	value, err := c.credsProvider.Get()
-	if c.signature.isV4() {
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		signerType      = value.SignerType
+		accessKeyID     = value.AccessKeyID
+		secretAccessKey = value.SecretAccessKey
+		sessionToken    = value.SessionToken
+	)
+
+	// Custom signer set then override the behavior.
+	if c.overrideSignerType != credentials.SignatureDefault {
+		signerType = c.overrideSignerType
+	}
+
+	// If signerType returned by credentials helper is anonymous,
+	// then do not sign regardless of signerType override.
+	if value.SignerType == credentials.SignatureAnonymous {
+		signerType = credentials.SignatureAnonymous
+	}
+
+	// set sha256 sum for signature calculation only with signature version '4'.
+	if signerType.IsV4() {
 		req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256([]byte{})))
 	}
 
@@ -155,19 +180,19 @@ func (c Client) makeBucketRequest(bucketName string, location string) (*http.Req
 		req.ContentLength = int64(len(createBucketConfigBytes))
 		// Set content-md5.
 		req.Header.Set("Content-Md5", base64.StdEncoding.EncodeToString(sumMD5(createBucketConfigBytes)))
-		if c.signature.isV4() {
+		if signerType.IsV4() {
 			// Set sha256.
 			req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256(createBucketConfigBytes)))
 		}
 	}
 
 	// Sign the request.
-	if c.signature.isV4() {
+	if signerType.IsV4() {
 		// Signature calculated for MakeBucket request should be for 'us-east-1',
 		// regardless of the bucket's location constraint.
-		req = s3signer.SignV4(*req, c.accessKeyID, c.secretAccessKey, "us-east-1")
+		req = s3signer.SignV4(*req, accessKeyID, secretAccessKey, sessionToken, "us-east-1")
-	} else if c.signature.isV2() {
+	} else if signerType.IsV2() {
-		req = s3signer.SignV2(*req, c.accessKeyID, c.secretAccessKey)
+		req = s3signer.SignV2(*req, accessKeyID, secretAccessKey)
 	}
 
 	// Return signed request.

vendor/github.com/minio/minio-go/api-put-bucket_test.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +28,7 @@ import (
 	"path"
 	"testing"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/s3signer"
 )
 
@@ -48,8 +50,32 @@ func TestMakeBucketRequest(t *testing.T) {
 		// set UserAgent for the request.
 		c.setUserAgent(req)
 
+		// Get credentials from the configured credentials provider.
+		value, err := c.credsProvider.Get()
+		if err != nil {
+			return nil, err
+		}
+
+		var (
+			signerType      = value.SignerType
+			accessKeyID     = value.AccessKeyID
+			secretAccessKey = value.SecretAccessKey
+			sessionToken    = value.SessionToken
+		)
+
+		// Custom signer set then override the behavior.
+		if c.overrideSignerType != credentials.SignatureDefault {
+			signerType = c.overrideSignerType
+		}
+
+		// If signerType returned by credentials helper is anonymous,
+		// then do not sign regardless of signerType override.
+		if value.SignerType == credentials.SignatureAnonymous {
+			signerType = credentials.SignatureAnonymous
+		}
+
 		// set sha256 sum for signature calculation only with signature version '4'.
-		if c.signature.isV4() {
+		if signerType.IsV4() {
 			req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256([]byte{})))
 		}
 
@@ -67,19 +93,19 @@ func TestMakeBucketRequest(t *testing.T) {
 			req.ContentLength = int64(len(createBucketConfigBytes))
 			// Set content-md5.
 			req.Header.Set("Content-Md5", base64.StdEncoding.EncodeToString(sumMD5(createBucketConfigBytes)))
-			if c.signature.isV4() {
+			if signerType.IsV4() {
 				// Set sha256.
 				req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256(createBucketConfigBytes)))
 			}
 		}
 
 		// Sign the request.
-		if c.signature.isV4() {
+		if signerType.IsV4() {
 			// Signature calculated for MakeBucket request should be for 'us-east-1',
 			// regardless of the bucket's location constraint.
-			req = s3signer.SignV4(*req, c.accessKeyID, c.secretAccessKey, "us-east-1")
+			req = s3signer.SignV4(*req, accessKeyID, secretAccessKey, sessionToken, "us-east-1")
-		} else if c.signature.isV2() {
+		} else if signerType.IsV2() {
-			req = s3signer.SignV2(*req, c.accessKeyID, c.secretAccessKey)
+			req = s3signer.SignV2(*req, accessKeyID, secretAccessKey)
 		}
 
 		// Return signed request.
@@ -246,7 +272,7 @@ func TestMakeBucketRequest(t *testing.T) {
 			}
 
 			if expectedReq.Header.Get("X-Amz-Content-Sha256") != actualReq.Header.Get("X-Amz-Content-Sha256") {
-				t.Errorf("Test %d: 'X-Amz-Content-Sha256' header of the expected request doesn't match with that of the actual request", i+1)
+				t.Errorf("Test %d: 'X-Amz-Content-Sha256' header of the expected request %s doesn't match with that of the actual request %s", i+1, expectedReq.Header.Get("X-Amz-Content-Sha256"), actualReq.Header.Get("X-Amz-Content-Sha256"))
 			}
 			if expectedReq.Header.Get("User-Agent") != actualReq.Header.Get("User-Agent") {
 				t.Errorf("Test %d: Expected 'User-Agent' header to be \"%s\",but found \"%s\" instead", i+1, expectedReq.Header.Get("User-Agent"), actualReq.Header.Get("User-Agent"))

vendor/github.com/minio/minio-go/api-put-object-file.go

@@ -182,7 +182,7 @@ func (c Client) putObjectMultipartFromFile(bucketName, objectName string, fileRe
 				hashAlgos := make(map[string]hash.Hash)
 				hashSums := make(map[string][]byte)
 				hashAlgos["md5"] = md5.New()
-				if c.signature.isV4() && !c.secure {
+				if c.overrideSignerType.IsV4() && !c.secure {
 					hashAlgos["sha256"] = sha256.New()
 				}
 

vendor/github.com/minio/minio-go/api-put-object-multipart.go

@@ -213,7 +213,7 @@ func (c Client) putObjectMultipartStream(bucketName, objectName string, reader i
 		hashSums := make(map[string][]byte)
 		hashAlgos := make(map[string]hash.Hash)
 		hashAlgos["md5"] = md5.New()
-		if c.signature.isV4() && !c.secure {
+		if c.overrideSignerType.IsV4() && !c.secure {
 			hashAlgos["sha256"] = sha256.New()
 		}
 

vendor/github.com/minio/minio-go/api-put-object-progress.go

@@ -20,6 +20,7 @@ import (
 	"io"
 	"strings"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/encrypt"
 	"github.com/minio/minio-go/pkg/s3utils"
 )
@@ -103,6 +104,7 @@ func (c Client) PutObjectWithMetadata(bucketName, objectName string, reader io.R
 	if size < minPartSize && size >= 0 {
 		return c.putObjectSingle(bucketName, objectName, reader, size, metaData, progress)
 	}
+
 	// For all sizes greater than 5MiB do multipart.
 	n, err = c.putObjectMultipart(bucketName, objectName, reader, size, metaData, progress)
 	if err != nil {
@@ -143,8 +145,8 @@ func (c Client) PutObjectStreamingWithProgress(bucketName, objectName string, re
 			BucketName: bucketName,
 		}
 	}
-	// This method should return error with signature v2 minioClient.
+
-	if c.signature.isV2() {
+	if c.overrideSignerType.IsV2() {
 		return 0, ErrorResponse{
 			Code:       "NotImplemented",
 			Message:    "AWS streaming signature v4 is not supported with minio client initialized for AWS signature v2",
@@ -173,8 +175,8 @@ func (c Client) PutObjectStreamingWithProgress(bucketName, objectName string, re
 		return c.putObjectMultipartStream(bucketName, objectName, reader, size, metadata, progress)
 	}
 
-	// Set signature type to streaming signature v4.
+	// Set streaming signature.
-	c.signature = SignatureV4Streaming
+	c.overrideSignerType = credentials.SignatureV4Streaming
 
 	if size < minPartSize && size >= 0 {
 		return c.putObjectNoChecksum(bucketName, objectName, reader, size, metadata, progress)

vendor/github.com/minio/minio-go/api-put-object-readat.go

@@ -146,7 +146,7 @@ func (c Client) putObjectMultipartFromReadAt(bucketName, objectName string, read
 				hashSums := make(map[string][]byte)
 				hashAlgos := make(map[string]hash.Hash)
 				hashAlgos["md5"] = md5.New()
-				if c.signature.isV4() && !c.secure {
+				if c.overrideSignerType.IsV4() && !c.secure {
 					hashAlgos["sha256"] = sha256.New()
 				}
 

vendor/github.com/minio/minio-go/api-put-object.go

@@ -109,14 +109,24 @@ func getReaderSize(reader io.Reader) (size int64, err error) {
 			case "|0", "|1":
 				return
 			}
-			size = st.Size()
+			var pos int64
+			pos, err = v.Seek(0, 1) // SeekCurrent.
+			if err != nil {
+				return -1, err
+			}
+			size = st.Size() - pos
 		case *Object:
 			var st ObjectInfo
 			st, err = v.Stat()
 			if err != nil {
 				return
 			}
-			size = st.Size
+			var pos int64
+			pos, err = v.Seek(0, 1) // SeekCurrent.
+			if err != nil {
+				return -1, err
+			}
+			size = st.Size - pos
 		}
 	}
 	// Returns the size here.
@@ -200,7 +210,7 @@ func (c Client) putObjectSingle(bucketName, objectName string, reader io.Reader,
 	hashAlgos := make(map[string]hash.Hash)
 	hashSums := make(map[string][]byte)
 	hashAlgos["md5"] = md5.New()
-	if c.signature.isV4() && !c.secure {
+	if c.overrideSignerType.IsV4() && !c.secure {
 		hashAlgos["sha256"] = sha256.New()
 	}
 

vendor/github.com/minio/minio-go/api.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +36,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/s3signer"
 	"github.com/minio/minio-go/pkg/s3utils"
 )
@@ -46,14 +48,11 @@ type Client struct {
 	// Parsed endpoint url provided by the user.
 	endpointURL url.URL
 
-	// AccessKeyID required for authorized requests.
+	// Holds various credential providers.
-	accessKeyID string
+	credsProvider *credentials.Credentials
-	// SecretAccessKey required for authorized requests.
+
-	secretAccessKey string
+	// Custom signerType value overrides all credentials.
-	// Choose a signature type if necessary.
+	overrideSignerType credentials.SignatureType
-	signature SignatureType
-	// Set to 'true' if Client has no access and secret keys.
-	anonymous bool
 
 	// User supplied.
 	appInfo struct {
@@ -100,58 +99,58 @@ const (
 // NewV2 - instantiate minio client with Amazon S3 signature version
 // '2' compatibility.
 func NewV2(endpoint string, accessKeyID, secretAccessKey string, secure bool) (*Client, error) {
-	clnt, err := privateNew(endpoint, accessKeyID, secretAccessKey, secure)
+	creds := credentials.NewStaticV2(accessKeyID, secretAccessKey, "")
+	clnt, err := privateNew(endpoint, creds, secure, "")
 	if err != nil {
 		return nil, err
 	}
-
+	clnt.overrideSignerType = credentials.SignatureV2
-	// Set to use signature version '2'.
-	clnt.signature = SignatureV2
 	return clnt, nil
 }
 
 // NewV4 - instantiate minio client with Amazon S3 signature version
 // '4' compatibility.
 func NewV4(endpoint string, accessKeyID, secretAccessKey string, secure bool) (*Client, error) {
-	clnt, err := privateNew(endpoint, accessKeyID, secretAccessKey, secure)
+	creds := credentials.NewStaticV4(accessKeyID, secretAccessKey, "")
+	clnt, err := privateNew(endpoint, creds, secure, "")
 	if err != nil {
 		return nil, err
 	}
-
+	clnt.overrideSignerType = credentials.SignatureV4
-	// Set to use signature version '4'.
-	clnt.signature = SignatureV4
 	return clnt, nil
 }
 
-// New - instantiate minio client Client, adds automatic verification of signature.
+// New - instantiate minio client, adds automatic verification of signature.
 func New(endpoint, accessKeyID, secretAccessKey string, secure bool) (*Client, error) {
-	return NewWithRegion(endpoint, accessKeyID, secretAccessKey, secure, "")
+	creds := credentials.NewStaticV4(accessKeyID, secretAccessKey, "")
+	clnt, err := privateNew(endpoint, creds, secure, "")
+	if err != nil {
+		return nil, err
+	}
+	// Google cloud storage should be set to signature V2, force it if not.
+	if s3utils.IsGoogleEndpoint(clnt.endpointURL) {
+		clnt.overrideSignerType = credentials.SignatureV2
+	}
+	// If Amazon S3 set to signature v4.
+	if s3utils.IsAmazonEndpoint(clnt.endpointURL) {
+		clnt.overrideSignerType = credentials.SignatureV4
+	}
+	return clnt, nil
+}
+
+// NewWithCredentials - instantiate minio client with credentials provider
+// for retrieving credentials from various credentials provider such as
+// IAM, File, Env etc.
+func NewWithCredentials(endpoint string, creds *credentials.Credentials, secure bool, region string) (*Client, error) {
+	return privateNew(endpoint, creds, secure, region)
 }
 
 // NewWithRegion - instantiate minio client, with region configured. Unlike New(),
 // NewWithRegion avoids bucket-location lookup operations and it is slightly faster.
 // Use this function when if your application deals with single region.
 func NewWithRegion(endpoint, accessKeyID, secretAccessKey string, secure bool, region string) (*Client, error) {
-	clnt, err := privateNew(endpoint, accessKeyID, secretAccessKey, secure)
+	creds := credentials.NewStaticV4(accessKeyID, secretAccessKey, "")
-	if err != nil {
+	return privateNew(endpoint, creds, secure, region)
-		return nil, err
-	}
-
-	// Google cloud storage should be set to signature V2, force it if not.
-	if s3utils.IsGoogleEndpoint(clnt.endpointURL) {
-		clnt.signature = SignatureV2
-	}
-
-	// If Amazon S3 set to signature v2.n
-	if s3utils.IsAmazonEndpoint(clnt.endpointURL) {
-		clnt.signature = SignatureV4
-	}
-
-	// Sets custom region, if region is empty bucket location cache is used automatically.
-	clnt.region = region
-
-	// Success..
-	return clnt, nil
 }
 
 // lockedRandSource provides protected rand source, implements rand.Source interface.
@@ -188,7 +187,7 @@ func redirectHeaders(req *http.Request, via []*http.Request) error {
 	return nil
 }
 
-func privateNew(endpoint, accessKeyID, secretAccessKey string, secure bool) (*Client, error) {
+func privateNew(endpoint string, creds *credentials.Credentials, secure bool, region string) (*Client, error) {
 	// construct endpoint.
 	endpointURL, err := getEndpointURL(endpoint, secure)
 	if err != nil {
@@ -197,8 +196,9 @@ func privateNew(endpoint, accessKeyID, secretAccessKey string, secure bool) (*Cl
 
 	// instantiate new Client.
 	clnt := new(Client)
-	clnt.accessKeyID = accessKeyID
+
-	clnt.secretAccessKey = secretAccessKey
+	// Save the credentials.
+	clnt.credsProvider = creds
 
 	// Remember whether we are using https or not
 	clnt.secure = secure
@@ -212,7 +212,10 @@ func privateNew(endpoint, accessKeyID, secretAccessKey string, secure bool) (*Cl
 		CheckRedirect: redirectHeaders,
 	}
 
-	// Instantiae bucket location cache.
+	// Sets custom region, if region is empty bucket location cache is used automatically.
+	clnt.region = region
+
+	// Instantiate bucket location cache.
 	clnt.bucketLocCache = newBucketLocationCache()
 
 	// Introduce a new locked random seed.
@@ -314,11 +317,12 @@ var regSign = regexp.MustCompile("Signature=([[0-9a-f]+)")
 
 // Filter out signature value from Authorization header.
 func (c Client) filterSignature(req *http.Request) {
-	if _, ok := req.Header["Authorization"]; !ok {
+	origAuth := req.Header.Get("Authorization")
+	if origAuth != "" {
 		return
 	}
-	// Handle if Signature V2.
+
-	if c.signature.isV2() {
+	if !strings.HasPrefix(origAuth, signV4Algorithm) {
 		// Set a temporary redacted auth
 		req.Header.Set("Authorization", "AWS **REDACTED**:**REDACTED**")
 		return
@@ -326,8 +330,6 @@ func (c Client) filterSignature(req *http.Request) {
 
 	/// Signature V4 authorization header.
 
-	// Save the original auth.
-	origAuth := req.Header.Get("Authorization")
 	// Strip out accessKeyID from:
 	// Credential=<access-key-id>/<date>/<aws-region>/<aws-service>/aws4_request
 	newAuth := regCred.ReplaceAllString(origAuth, "Credential=**REDACTED**/")
@@ -337,6 +339,7 @@ func (c Client) filterSignature(req *http.Request) {
 
 	// Set a temporary redacted auth
 	req.Header.Set("Authorization", newAuth)
+
 	return
 }
 
@@ -553,7 +556,7 @@ func (c Client) executeMethod(method string, metadata requestMetadata) (res *htt
 		// Bucket region if set in error response and the error
 		// code dictates invalid region, we can retry the request
 		// with the new region.
-		if errResponse.Code == "InvalidRegion" && errResponse.Region != "" {
+		if res.StatusCode == http.StatusBadRequest && errResponse.Region != "" {
 			c.bucketLocCache.Set(metadata.bucketName, errResponse.Region)
 			continue // Retry.
 		}
@@ -614,20 +617,41 @@ func (c Client) newRequest(method string, metadata requestMetadata) (req *http.R
 		return nil, err
 	}
 
-	// Anonymous request.
+	// Get credentials from the configured credentials provider.
-	anonymous := c.accessKeyID == "" || c.secretAccessKey == ""
+	value, err := c.credsProvider.Get()
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		signerType      = value.SignerType
+		accessKeyID     = value.AccessKeyID
+		secretAccessKey = value.SecretAccessKey
+		sessionToken    = value.SessionToken
+	)
+
+	// Custom signer set then override the behavior.
+	if c.overrideSignerType != credentials.SignatureDefault {
+		signerType = c.overrideSignerType
+	}
+
+	// If signerType returned by credentials helper is anonymous,
+	// then do not sign regardless of signerType override.
+	if value.SignerType == credentials.SignatureAnonymous {
+		signerType = credentials.SignatureAnonymous
+	}
 
 	// Generate presign url if needed, return right here.
 	if metadata.expires != 0 && metadata.presignURL {
-		if anonymous {
+		if signerType.IsAnonymous() {
-			return nil, ErrInvalidArgument("Requests cannot be presigned with anonymous credentials.")
+			return nil, ErrInvalidArgument("Presigned URLs cannot be generated with anonymous credentials.")
 		}
-		if c.signature.isV2() {
+		if signerType.IsV2() {
 			// Presign URL with signature v2.
-			req = s3signer.PreSignV2(*req, c.accessKeyID, c.secretAccessKey, metadata.expires)
+			req = s3signer.PreSignV2(*req, accessKeyID, secretAccessKey, metadata.expires)
-		} else if c.signature.isV4() {
+		} else if signerType.IsV4() {
 			// Presign URL with signature v4.
-			req = s3signer.PreSignV4(*req, c.accessKeyID, c.secretAccessKey, location, metadata.expires)
+			req = s3signer.PreSignV4(*req, accessKeyID, secretAccessKey, sessionToken, location, metadata.expires)
 		}
 		return req, nil
 	}
@@ -650,17 +674,18 @@ func (c Client) newRequest(method string, metadata requestMetadata) (req *http.R
 		req.Header.Set("Content-Md5", base64.StdEncoding.EncodeToString(metadata.contentMD5Bytes))
 	}
 
-	if anonymous {
+	// For anonymous requests just return.
+	if signerType.IsAnonymous() {
 		return req, nil
-	} // Sign the request for all authenticated requests.
+	}
 
 	switch {
-	case c.signature.isV2():
+	case signerType.IsV2():
 		// Add signature version '2' authorization header.
-		req = s3signer.SignV2(*req, c.accessKeyID, c.secretAccessKey)
+		req = s3signer.SignV2(*req, accessKeyID, secretAccessKey)
-	case c.signature.isStreamingV4() && method == "PUT":
+	case signerType.IsStreamingV4() && method == "PUT":
-		req = s3signer.StreamingSignV4(req, c.accessKeyID,
+		req = s3signer.StreamingSignV4(req, accessKeyID,
-			c.secretAccessKey, location, metadata.contentLength, time.Now().UTC())
+			secretAccessKey, sessionToken, location, metadata.contentLength, time.Now().UTC())
 	default:
 		// Set sha256 sum for signature calculation only with signature version '4'.
 		shaHeader := unsignedPayload
@@ -670,7 +695,7 @@ func (c Client) newRequest(method string, metadata requestMetadata) (req *http.R
 		req.Header.Set("X-Amz-Content-Sha256", shaHeader)
 
 		// Add signature version '4' authorization header.
-		req = s3signer.SignV4(*req, c.accessKeyID, c.secretAccessKey, location)
+		req = s3signer.SignV4(*req, accessKeyID, secretAccessKey, sessionToken, location)
 	}
 
 	// Return request.
@@ -732,13 +757,16 @@ func (c Client) makeTargetURL(bucketName, objectName, bucketLocation string, que
 			}
 		}
 	}
+
 	// If there are any query values, add them to the end.
 	if len(queryValues) > 0 {
 		urlStr = urlStr + "?" + s3utils.QueryEncode(queryValues)
 	}
+
 	u, err := url.Parse(urlStr)
 	if err != nil {
 		return nil, err
 	}
+
 	return u, nil
 }

vendor/github.com/minio/minio-go/api_functional_v4_test.go

@@ -18,7 +18,6 @@ package minio
 
 import (
 	"bytes"
-	crand "crypto/rand"
 	"encoding/hex"
 	"errors"
 	"fmt"
@@ -201,14 +200,10 @@ func TestPutObjectReadAt(t *testing.T) {
 	}
 
 	// Generate data using 4 parts so that all 3 'workers' are utilized and a part is leftover.
-	buf := make([]byte, minPartSize*4)
+	// Use different data for each part for multipart tests to ensure part order at the end.
-	// Use crand.Reader for multipart tests to ensure part order at the end.
+	var buf []byte
-	size, err := io.ReadFull(crand.Reader, buf)
+	for i := 0; i < 4; i++ {
-	if err != nil {
+		buf = append(buf, bytes.Repeat([]byte(string('a'+i)), minPartSize)...)
-		t.Fatal("Error:", err)
-	}
-	if size != minPartSize*4 {
-		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", minPartSize*4, size)
 	}
 
 	// Save the data
@@ -295,14 +290,10 @@ func TestPutObjectWithMetadata(t *testing.T) {
 	}
 
 	// Generate data using 2 parts
-	buf := make([]byte, minPartSize*2)
+	// Use different data in each part for multipart tests to ensure part order at the end.
-	// Use crand.Reader for multipart tests to ensure part order at the end.
+	var buf []byte
-	size, err := io.ReadFull(crand.Reader, buf)
+	for i := 0; i < 2; i++ {
-	if err != nil {
+		buf = append(buf, bytes.Repeat([]byte(string('a'+i)), minPartSize)...)
-		t.Fatal("Error:", err)
-	}
-	if size != minPartSize*2 {
-		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", minPartSize*2, size)
 	}
 
 	// Save the data
@@ -856,7 +847,6 @@ func TestResumablePutObject(t *testing.T) {
 		t.Fatal("Error:", err)
 	}
 	r := bytes.NewReader(bytes.Repeat([]byte("b"), minPartSize*2))
-	// Copy 11MiB worth of random data.
 	n, err := io.CopyN(file, r, minPartSize*2)
 	if err != nil {
 		t.Fatal("Error:", err)
@@ -972,16 +962,13 @@ func TestResumableFPutObject(t *testing.T) {
 	}
 
 	// Upload 4 parts to use all 3 multipart 'workers' and have an extra part.
-	buffer := make([]byte, minPartSize*4)
+	// Use different data in each part for multipart tests to ensure parts are uploaded in correct order.
-	// Use crand.Reader for multipart tests to ensure parts are uploaded in correct order.
+	var buffer []byte
-	size, err := io.ReadFull(crand.Reader, buffer)
+	for i := 0; i < 4; i++ {
-	if err != nil {
+		buffer = append(buffer, bytes.Repeat([]byte(string('a'+i)), minPartSize)...)
-		t.Fatal("Error:", err)
 	}
-	if size != minPartSize*4 {
+
-		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", minPartSize*4, size)
+	size, err := file.Write(buffer)
-	}
-	size, err = file.Write(buffer)
 	if err != nil {
 		t.Fatal("Error:", err)
 	}
@@ -1063,16 +1050,12 @@ func TestFPutObjectMultipart(t *testing.T) {
 	}
 
 	// Upload 4 parts to utilize all 3 'workers' in multipart and still have a part to upload.
-	buffer := make([]byte, minPartSize*4)
+	var buffer []byte
+	for i := 0; i < 4; i++ {
+		buffer = append(buffer, bytes.Repeat([]byte(string('a'+i)), minPartSize)...)
+	}
 
-	size, err := io.ReadFull(crand.Reader, buffer)
+	size, err := file.Write(buffer)
-	if err != nil {
-		t.Fatal("Error:", err)
-	}
-	if size != minPartSize*4 {
-		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", minPartSize*4, size)
-	}
-	size, err = file.Write(buffer)
 	if err != nil {
 		t.Fatal("Error:", err)
 	}
@@ -1168,18 +1151,14 @@ func TestFPutObject(t *testing.T) {
 	}
 
 	// Upload 4 parts worth of data to use all 3 of multiparts 'workers' and have an extra part.
-	buffer := make([]byte, minPartSize*4)
+	// Use different data in part for multipart tests to check parts are uploaded in correct order.
-	// Use random data for multipart tests to check parts are uploaded in correct order.
+	var buffer []byte
-	size, err := io.ReadFull(crand.Reader, buffer)
+	for i := 0; i < 4; i++ {
-	if err != nil {
+		buffer = append(buffer, bytes.Repeat([]byte(string('a'+i)), minPartSize)...)
-		t.Fatal("Error:", err)
-	}
-	if size != minPartSize*4 {
-		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", minPartSize*4, size)
 	}
 
 	// Write the data to the file.
-	size, err = file.Write(buffer)
+	size, err := file.Write(buffer)
 	if err != nil {
 		t.Fatal("Error:", err)
 	}
@@ -2498,3 +2477,97 @@ func TestGetObjectObjectModified(t *testing.T) {
 		t.Errorf("Expected ReadAt to fail with error %s but received %s", s3ErrorResponseMap["PreconditionFailed"], err.Error())
 	}
 }
+
+// Test validates putObject to upload a file seeked at a given offset.
+func TestPutObjectUploadSeekedObject(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping functional tests for the short runs")
+	}
+
+	// Instantiate new minio client object.
+	c, err := NewV4(
+		os.Getenv("S3_ADDRESS"),
+		os.Getenv("ACCESS_KEY"),
+		os.Getenv("SECRET_KEY"),
+		mustParseBool(os.Getenv("S3_SECURE")),
+	)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	// Enable tracing, write to stderr.
+	// c.TraceOn(os.Stderr)
+
+	// Set user agent.
+	c.SetAppInfo("Minio-go-FunctionalTest", "0.1.0")
+
+	// Make a new bucket.
+	bucketName := randString(60, rand.NewSource(time.Now().UnixNano()), "minio-go-test")
+	err = c.MakeBucket(bucketName, "us-east-1")
+	if err != nil {
+		t.Fatal("Error:", err, bucketName)
+	}
+	defer c.RemoveBucket(bucketName)
+
+	tempfile, err := ioutil.TempFile("", "minio-go-upload-test-")
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	var length = 120000
+	data := bytes.Repeat([]byte("1"), length)
+
+	if _, err = tempfile.Write(data); err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	objectName := fmt.Sprintf("test-file-%v", rand.Uint32())
+
+	offset := length / 2
+	if _, err := tempfile.Seek(int64(offset), 0); err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	n, err := c.PutObject(bucketName, objectName, tempfile, "binary/octet-stream")
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+	if n != int64(length-offset) {
+		t.Fatalf("Invalid length returned, want %v, got %v", int64(length-offset), n)
+	}
+	tempfile.Close()
+	if err = os.Remove(tempfile.Name()); err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	length = int(n)
+
+	obj, err := c.GetObject(bucketName, objectName)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	n, err = obj.Seek(int64(offset), 0)
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+	if n != int64(offset) {
+		t.Fatalf("Invalid offset returned, want %v, got %v", int64(offset), n)
+	}
+
+	n, err = c.PutObject(bucketName, objectName+"getobject", obj, "binary/octet-stream")
+	if err != nil {
+		t.Fatal("Error:", err)
+	}
+	if n != int64(length-offset) {
+		t.Fatalf("Invalid length returned, want %v, got %v", int64(length-offset), n)
+	}
+
+	if err = c.RemoveObject(bucketName, objectName); err != nil {
+		t.Fatal("Error:", err)
+	}
+
+	if err = c.RemoveObject(bucketName, objectName+"getobject"); err != nil {
+		t.Fatal("Error:", err)
+	}
+}

vendor/github.com/minio/minio-go/api_unit_test.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +26,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/policy"
 )
 
@@ -228,18 +230,18 @@ func TestErrorResponse(t *testing.T) {
 // Tests signature type.
 func TestSignatureType(t *testing.T) {
 	clnt := Client{}
-	if !clnt.signature.isV4() {
+	if !clnt.overrideSignerType.IsV4() {
 		t.Fatal("Error")
 	}
-	clnt.signature = SignatureV2
+	clnt.overrideSignerType = credentials.SignatureV2
-	if !clnt.signature.isV2() {
+	if !clnt.overrideSignerType.IsV2() {
 		t.Fatal("Error")
 	}
-	if clnt.signature.isV4() {
+	if clnt.overrideSignerType.IsV4() {
 		t.Fatal("Error")
 	}
-	clnt.signature = SignatureV4
+	clnt.overrideSignerType = credentials.SignatureV4
-	if !clnt.signature.isV4() {
+	if !clnt.overrideSignerType.IsV4() {
 		t.Fatal("Error")
 	}
 }

vendor/github.com/minio/minio-go/appveyor.yml

@@ -17,6 +17,8 @@ install:
   - go version
   - go env
   - go get -u github.com/golang/lint/golint
+  - go get -u github.com/go-ini/ini
+  - go get -u github.com/minio/go-homedir
   - go get -u github.com/remyoudompheng/go-misc/deadcode
   - go get -u github.com/gordonklaus/ineffassign
 

vendor/github.com/minio/minio-go/bucket-cache.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +24,7 @@ import (
 	"path"
 	"sync"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/s3signer"
 	"github.com/minio/minio-go/pkg/s3utils"
 )
@@ -181,8 +183,33 @@ func (c Client) getBucketLocationRequest(bucketName string) (*http.Request, erro
 	// Set UserAgent for the request.
 	c.setUserAgent(req)
 
+	// Get credentials from the configured credentials provider.
+	value, err := c.credsProvider.Get()
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		signerType      = value.SignerType
+		accessKeyID     = value.AccessKeyID
+		secretAccessKey = value.SecretAccessKey
+		sessionToken    = value.SessionToken
+	)
+
+	// Custom signer set then override the behavior.
+	if c.overrideSignerType != credentials.SignatureDefault {
+		signerType = c.overrideSignerType
+	}
+
+	// If signerType returned by credentials helper is anonymous,
+	// then do not sign regardless of signerType override.
+	if value.SignerType == credentials.SignatureAnonymous {
+		signerType = credentials.SignatureAnonymous
+	}
+
 	// Set sha256 sum for signature calculation only with signature version '4'.
-	if c.signature.isV4() {
+	switch {
+	case signerType.IsV4():
 		var contentSha256 string
 		if c.secure {
 			contentSha256 = unsignedPayload
@@ -190,13 +217,10 @@ func (c Client) getBucketLocationRequest(bucketName string) (*http.Request, erro
 			contentSha256 = hex.EncodeToString(sum256([]byte{}))
 		}
 		req.Header.Set("X-Amz-Content-Sha256", contentSha256)
+		req = s3signer.SignV4(*req, accessKeyID, secretAccessKey, sessionToken, "us-east-1")
+	case signerType.IsV2():
+		req = s3signer.SignV2(*req, accessKeyID, secretAccessKey)
 	}
 
-	// Sign the request.
-	if c.signature.isV4() {
-		req = s3signer.SignV4(*req, c.accessKeyID, c.secretAccessKey, "us-east-1")
-	} else if c.signature.isV2() {
-		req = s3signer.SignV2(*req, c.accessKeyID, c.secretAccessKey)
-	}
 	return req, nil
 }

vendor/github.com/minio/minio-go/bucket-cache_test.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2016, 2016 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +28,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/minio/minio-go/pkg/credentials"
 	"github.com/minio/minio-go/pkg/s3signer"
 )
 
@@ -86,17 +88,46 @@ func TestGetBucketLocationRequest(t *testing.T) {
 		// Set UserAgent for the request.
 		c.setUserAgent(req)
 
-		// Set sha256 sum for signature calculation only with signature version '4'.
+		// Get credentials from the configured credentials provider.
-		if c.signature.isV4() {
+		value, err := c.credsProvider.Get()
-			req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256([]byte{})))
+		if err != nil {
+			return nil, err
 		}
 
-		// Sign the request.
+		var (
-		if c.signature.isV4() {
+			signerType      = value.SignerType
-			req = s3signer.SignV4(*req, c.accessKeyID, c.secretAccessKey, "us-east-1")
+			accessKeyID     = value.AccessKeyID
-		} else if c.signature.isV2() {
+			secretAccessKey = value.SecretAccessKey
-			req = s3signer.SignV2(*req, c.accessKeyID, c.secretAccessKey)
+			sessionToken    = value.SessionToken
+		)
+
+		// Custom signer set then override the behavior.
+		if c.overrideSignerType != credentials.SignatureDefault {
+			signerType = c.overrideSignerType
 		}
+
+		// If signerType returned by credentials helper is anonymous,
+		// then do not sign regardless of signerType override.
+		if value.SignerType == credentials.SignatureAnonymous {
+			signerType = credentials.SignatureAnonymous
+		}
+
+		// Set sha256 sum for signature calculation only
+		// with signature version '4'.
+		switch {
+		case signerType.IsV4():
+			var contentSha256 string
+			if c.secure {
+				contentSha256 = unsignedPayload
+			} else {
+				contentSha256 = hex.EncodeToString(sum256([]byte{}))
+			}
+			req.Header.Set("X-Amz-Content-Sha256", contentSha256)
+			req = s3signer.SignV4(*req, accessKeyID, secretAccessKey, sessionToken, "us-east-1")
+		case signerType.IsV2():
+			req = s3signer.SignV2(*req, accessKeyID, secretAccessKey)
+		}
+
 		return req, nil
 
 	}

vendor/github.com/minio/minio-go/core_test.go

@@ -19,7 +19,6 @@ package minio
 import (
 	"bytes"
 	"crypto/md5"
-	crand "crypto/rand"
 
 	"io"
 	"math/rand"
@@ -301,15 +300,7 @@ func TestCorePutObject(t *testing.T) {
 		t.Fatal("Error:", err, bucketName)
 	}
 
-	buf := make([]byte, minPartSize)
+	buf := bytes.Repeat([]byte("a"), minPartSize)
-
-	size, err := io.ReadFull(crand.Reader, buf)
-	if err != nil {
-		t.Fatal("Error:", err)
-	}
-	if size != minPartSize {
-		t.Fatalf("Error: number of bytes does not match, want %v, got %v\n", minPartSize, size)
-	}
 
 	// Save the data
 	objectName := randString(60, rand.NewSource(time.Now().UnixNano()), "")

vendor/github.com/minio/minio-go/examples/s3/putobject-getobject-sse.go

@@ -0,0 +1,87 @@
+// +build ignore
+
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/base64"
+	"io/ioutil"
+	"log"
+	"net/http"
+
+	minio "github.com/minio/minio-go"
+)
+
+func main() {
+	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-testfile, my-bucketname and
+	// my-objectname are dummy values, please replace them with original values.
+
+	// New returns an Amazon S3 compatible client object. API compatibility (v2 or v4) is automatically
+	// determined based on the Endpoint value.
+	minioClient, err := minio.New("s3.amazonaws.com", "YOUR-ACCESSKEYID", "YOUR-SECRETACCESSKEY", true)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	content := bytes.NewReader([]byte("Hello again"))
+	key := []byte("32byteslongsecretkeymustprovided")
+	h := md5.New()
+	h.Write(key)
+	encryptionKey := base64.StdEncoding.EncodeToString(key)
+	encryptionKeyMD5 := base64.StdEncoding.EncodeToString(h.Sum(nil))
+
+	// Amazon S3 does not store the encryption key you provide.
+	// Instead S3 stores a randomly salted HMAC value of the
+	// encryption key in order to validate future requests.
+	// The salted HMAC value cannot be used to derive the value
+	// of the encryption key or to decrypt the contents of the
+	// encrypted object. That means, if you lose the encryption
+	// key, you lose the object.
+	var metadata = map[string][]string{
+		"x-amz-server-side-encryption-customer-algorithm": []string{"AES256"},
+		"x-amz-server-side-encryption-customer-key":       []string{encryptionKey},
+		"x-amz-server-side-encryption-customer-key-MD5":   []string{encryptionKeyMD5},
+	}
+
+	// minioClient.TraceOn(os.Stderr) // Enable to debug.
+	_, err = minioClient.PutObjectWithMetadata("mybucket", "my-encrypted-object.txt", content, metadata, nil)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	var reqHeaders = minio.RequestHeaders{Header: http.Header{}}
+	for k, v := range metadata {
+		reqHeaders.Set(k, v[0])
+	}
+	coreClient := minio.Core{minioClient}
+	reader, _, err := coreClient.GetObject("mybucket", "my-encrypted-object.txt", reqHeaders)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer reader.Close()
+
+	decBytes, err := ioutil.ReadAll(reader)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	if !bytes.Equal(decBytes, []byte("Hello again")) {
+		log.Fatalln("Expected \"Hello, world\", got %s", string(decBytes))
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/chain.go

@@ -0,0 +1,89 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import "fmt"
+
+// A Chain will search for a provider which returns credentials
+// and cache that provider until Retrieve is called again.
+//
+// The Chain provides a way of chaining multiple providers together
+// which will pick the first available using priority order of the
+// Providers in the list.
+//
+// If none of the Providers retrieve valid credentials Value, ChainProvider's
+// Retrieve() will return the error, collecting all errors from all providers.
+//
+// If a Provider is found which returns valid credentials Value ChainProvider
+// will cache that Provider for all calls to IsExpired(), until Retrieve is
+// called again.
+//
+//     creds := credentials.NewChainCredentials(
+//         []credentials.Provider{
+//             &credentials.EnvAWSS3{},
+//             &credentials.EnvMinio{},
+//         })
+//
+//     // Usage of ChainCredentials.
+//     mc, err := minio.NewWithCredentials(endpoint, creds, secure, "us-east-1")
+//     if err != nil {
+//          log.Fatalln(err)
+//     }
+//
+type Chain struct {
+	Providers []Provider
+	curr      Provider
+}
+
+// NewChainCredentials returns a pointer to a new Credentials object
+// wrapping a chain of providers.
+func NewChainCredentials(providers []Provider) *Credentials {
+	return New(&Chain{
+		Providers: append([]Provider{}, providers...),
+	})
+}
+
+// Retrieve returns the credentials value or error if no provider returned
+// without error.
+//
+// If a provider is found it will be cached and any calls to IsExpired()
+// will return the expired state of the cached provider.
+func (c *Chain) Retrieve() (Value, error) {
+	var errs []error
+	for _, p := range c.Providers {
+		creds, err := p.Retrieve()
+		if err != nil {
+			errs = append(errs, err)
+			continue
+		} // Success.
+		c.curr = p
+		return creds, nil
+	}
+	c.curr = nil
+	return Value{}, fmt.Errorf("No valid providers found %v", errs)
+}
+
+// IsExpired will returned the expired state of the currently cached provider
+// if there is one.  If there is no current provider, true will be returned.
+func (c *Chain) IsExpired() bool {
+	if c.curr != nil {
+		return c.curr.IsExpired()
+	}
+
+	return true
+}

vendor/github.com/minio/minio-go/pkg/credentials/chain_test.go

@@ -0,0 +1,137 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"errors"
+	"testing"
+)
+
+type testCredProvider struct {
+	creds   Value
+	expired bool
+	err     error
+}
+
+func (s *testCredProvider) Retrieve() (Value, error) {
+	s.expired = false
+	return s.creds, s.err
+}
+func (s *testCredProvider) IsExpired() bool {
+	return s.expired
+}
+
+func TestChainGet(t *testing.T) {
+	p := &Chain{
+		Providers: []Provider{
+			&credProvider{err: errors.New("FirstError")},
+			&credProvider{err: errors.New("SecondError")},
+			&testCredProvider{
+				creds: Value{
+					AccessKeyID:     "AKIF",
+					SecretAccessKey: "NOSECRET",
+					SessionToken:    "",
+				},
+			},
+			&credProvider{
+				creds: Value{
+					AccessKeyID:     "AKID",
+					SecretAccessKey: "SECRET",
+					SessionToken:    "",
+				},
+			},
+		},
+	}
+
+	creds, err := p.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Also check credentials
+	if creds.AccessKeyID != "AKIF" {
+		t.Fatalf("Expected 'AKIF', got %s", creds.AccessKeyID)
+	}
+	if creds.SecretAccessKey != "NOSECRET" {
+		t.Fatalf("Expected 'NOSECRET', got %s", creds.SecretAccessKey)
+	}
+	if creds.SessionToken != "" {
+		t.Fatalf("Expected empty token, got %s", creds.SessionToken)
+	}
+}
+
+func TestChainIsExpired(t *testing.T) {
+	credProvider := &credProvider{expired: true}
+	p := &Chain{
+		Providers: []Provider{
+			credProvider,
+		},
+	}
+
+	if !p.IsExpired() {
+		t.Fatal("Expected expired to be true before any Retrieve")
+	}
+
+	_, err := p.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if p.IsExpired() {
+		t.Fatal("Expected to be not expired after Retrieve")
+	}
+}
+
+func TestChainWithNoProvider(t *testing.T) {
+	p := &Chain{
+		Providers: []Provider{},
+	}
+	if !p.IsExpired() {
+		t.Fatal("Expected to be expired with no providers")
+	}
+	_, err := p.Retrieve()
+	if err != nil {
+		if err.Error() != "No valid providers found []" {
+			t.Error(err)
+		}
+	}
+}
+
+func TestChainProviderWithNoValidProvider(t *testing.T) {
+	errs := []error{
+		errors.New("FirstError"),
+		errors.New("SecondError"),
+	}
+	p := &Chain{
+		Providers: []Provider{
+			&credProvider{err: errs[0]},
+			&credProvider{err: errs[1]},
+		},
+	}
+
+	if !p.IsExpired() {
+		t.Fatal("Expected to be expired with no providers")
+	}
+
+	_, err := p.Retrieve()
+	if err != nil {
+		if err.Error() != "No valid providers found [FirstError SecondError]" {
+			t.Error(err)
+		}
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/config.json.sample

@@ -0,0 +1,17 @@
+{
+	"version": "8",
+	"hosts": {
+		"play": {
+			"url": "https://play.minio.io:9000",
+			"accessKey": "Q3AM3UQ867SPQQA43P2F",
+			"secretKey": "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG",
+			"api": "S3v2"
+		},
+		"s3": {
+			"url": "https://s3.amazonaws.com",
+			"accessKey": "accessKey",
+			"secretKey": "secret",
+			"api": "S3v4"
+		}
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/credentials.go

@@ -0,0 +1,175 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"sync"
+	"time"
+)
+
+// A Value is the AWS credentials value for individual credential fields.
+type Value struct {
+	// AWS Access key ID
+	AccessKeyID string
+
+	// AWS Secret Access Key
+	SecretAccessKey string
+
+	// AWS Session Token
+	SessionToken string
+
+	// Signature Type.
+	SignerType SignatureType
+}
+
+// A Provider is the interface for any component which will provide credentials
+// Value. A provider is required to manage its own Expired state, and what to
+// be expired means.
+type Provider interface {
+	// Retrieve returns nil if it successfully retrieved the value.
+	// Error is returned if the value were not obtainable, or empty.
+	Retrieve() (Value, error)
+
+	// IsExpired returns if the credentials are no longer valid, and need
+	// to be retrieved.
+	IsExpired() bool
+}
+
+// A Expiry provides shared expiration logic to be used by credentials
+// providers to implement expiry functionality.
+//
+// The best method to use this struct is as an anonymous field within the
+// provider's struct.
+//
+// Example:
+//     type IAMCredentialProvider struct {
+//         Expiry
+//         ...
+//     }
+type Expiry struct {
+	// The date/time when to expire on
+	expiration time.Time
+
+	// If set will be used by IsExpired to determine the current time.
+	// Defaults to time.Now if CurrentTime is not set.
+	CurrentTime func() time.Time
+}
+
+// SetExpiration sets the expiration IsExpired will check when called.
+//
+// If window is greater than 0 the expiration time will be reduced by the
+// window value.
+//
+// Using a window is helpful to trigger credentials to expire sooner than
+// the expiration time given to ensure no requests are made with expired
+// tokens.
+func (e *Expiry) SetExpiration(expiration time.Time, window time.Duration) {
+	e.expiration = expiration
+	if window > 0 {
+		e.expiration = e.expiration.Add(-window)
+	}
+}
+
+// IsExpired returns if the credentials are expired.
+func (e *Expiry) IsExpired() bool {
+	if e.CurrentTime == nil {
+		e.CurrentTime = time.Now
+	}
+	return e.expiration.Before(e.CurrentTime())
+}
+
+// Credentials - A container for synchronous safe retrieval of credentials Value.
+// Credentials will cache the credentials value until they expire. Once the value
+// expires the next Get will attempt to retrieve valid credentials.
+//
+// Credentials is safe to use across multiple goroutines and will manage the
+// synchronous state so the Providers do not need to implement their own
+// synchronization.
+//
+// The first Credentials.Get() will always call Provider.Retrieve() to get the
+// first instance of the credentials Value. All calls to Get() after that
+// will return the cached credentials Value until IsExpired() returns true.
+type Credentials struct {
+	sync.Mutex
+
+	creds        Value
+	forceRefresh bool
+	provider     Provider
+}
+
+// New returns a pointer to a new Credentials with the provider set.
+func New(provider Provider) *Credentials {
+	return &Credentials{
+		provider:     provider,
+		forceRefresh: true,
+	}
+}
+
+// Get returns the credentials value, or error if the credentials Value failed
+// to be retrieved.
+//
+// Will return the cached credentials Value if it has not expired. If the
+// credentials Value has expired the Provider's Retrieve() will be called
+// to refresh the credentials.
+//
+// If Credentials.Expire() was called the credentials Value will be force
+// expired, and the next call to Get() will cause them to be refreshed.
+func (c *Credentials) Get() (Value, error) {
+	c.Lock()
+	defer c.Unlock()
+
+	if c.isExpired() {
+		creds, err := c.provider.Retrieve()
+		if err != nil {
+			return Value{}, err
+		}
+		c.creds = creds
+		c.forceRefresh = false
+	}
+
+	return c.creds, nil
+}
+
+// Expire expires the credentials and forces them to be retrieved on the
+// next call to Get().
+//
+// This will override the Provider's expired state, and force Credentials
+// to call the Provider's Retrieve().
+func (c *Credentials) Expire() {
+	c.Lock()
+	defer c.Unlock()
+
+	c.forceRefresh = true
+}
+
+// IsExpired returns if the credentials are no longer valid, and need
+// to be refreshed.
+//
+// If the Credentials were forced to be expired with Expire() this will
+// reflect that override.
+func (c *Credentials) IsExpired() bool {
+	c.Lock()
+	defer c.Unlock()
+
+	return c.isExpired()
+}
+
+// isExpired helper method wrapping the definition of expired credentials.
+func (c *Credentials) isExpired() bool {
+	return c.forceRefresh || c.provider.IsExpired()
+}

vendor/github.com/minio/minio-go/pkg/credentials/credentials.sample

@@ -0,0 +1,12 @@
+[default]
+aws_access_key_id = accessKey
+aws_secret_access_key = secret
+aws_session_token = token
+
+[no_token]
+aws_access_key_id = accessKey
+aws_secret_access_key = secret
+
+[with_colon]
+aws_access_key_id: accessKey
+aws_secret_access_key: secret

vendor/github.com/minio/minio-go/pkg/credentials/credentials_test.go

@@ -0,0 +1,73 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"errors"
+	"testing"
+)
+
+type credProvider struct {
+	creds   Value
+	expired bool
+	err     error
+}
+
+func (s *credProvider) Retrieve() (Value, error) {
+	s.expired = false
+	return s.creds, s.err
+}
+func (s *credProvider) IsExpired() bool {
+	return s.expired
+}
+
+func TestCredentialsGet(t *testing.T) {
+	c := New(&credProvider{
+		creds: Value{
+			AccessKeyID:     "UXHW",
+			SecretAccessKey: "MYSECRET",
+			SessionToken:    "",
+		},
+		expired: true,
+	})
+
+	creds, err := c.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if "UXHW" != creds.AccessKeyID {
+		t.Errorf("Expected \"UXHW\", got %s", creds.AccessKeyID)
+	}
+	if "MYSECRET" != creds.SecretAccessKey {
+		t.Errorf("Expected \"MYSECRET\", got %s", creds.SecretAccessKey)
+	}
+	if creds.SessionToken != "" {
+		t.Errorf("Expected session token to be empty, got %s", creds.SessionToken)
+	}
+}
+
+func TestCredentialsGetWithError(t *testing.T) {
+	c := New(&credProvider{err: errors.New("Custom error")})
+
+	_, err := c.Get()
+	if err != nil {
+		if err.Error() != "Custom error" {
+			t.Errorf("Expected \"Custom error\", got %s", err.Error())
+		}
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/doc.go

@@ -0,0 +1,45 @@
+// Package credentials provides credential retrieval and management
+// for S3 compatible object storage.
+//
+// By default the Credentials.Get() will cache the successful result of a
+// Provider's Retrieve() until Provider.IsExpired() returns true. At which
+// point Credentials will call Provider's Retrieve() to get new credential Value.
+//
+// The Provider is responsible for determining when credentials have expired.
+// It is also important to note that Credentials will always call Retrieve the
+// first time Credentials.Get() is called.
+//
+// Example of using the environment variable credentials.
+//
+//     creds := NewFromEnv()
+//     // Retrieve the credentials value
+//     credValue, err := creds.Get()
+//     if err != nil {
+//         // handle error
+//     }
+//
+// Example of forcing credentials to expire and be refreshed on the next Get().
+// This may be helpful to proactively expire credentials and refresh them sooner
+// than they would naturally expire on their own.
+//
+//     creds := NewFromIAM("")
+//     creds.Expire()
+//     credsValue, err := creds.Get()
+//     // New credentials will be retrieved instead of from cache.
+//
+//
+// Custom Provider
+//
+// Each Provider built into this package also provides a helper method to generate
+// a Credentials pointer setup with the provider. To use a custom Provider just
+// create a type which satisfies the Provider interface and pass it to the
+// NewCredentials method.
+//
+//     type MyProvider struct{}
+//     func (m *MyProvider) Retrieve() (Value, error) {...}
+//     func (m *MyProvider) IsExpired() bool {...}
+//
+//     creds := NewCredentials(&MyProvider{})
+//     credValue, err := creds.Get()
+//
+package credentials

vendor/github.com/minio/minio-go/pkg/credentials/env_aws.go

@@ -0,0 +1,71 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import "os"
+
+// A EnvAWS retrieves credentials from the environment variables of the
+// running process. EnvAWSironment credentials never expire.
+//
+// EnvAWSironment variables used:
+//
+// * Access Key ID:     AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY.
+// * Secret Access Key: AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY.
+// * Secret Token:      AWS_SESSION_TOKEN.
+type EnvAWS struct {
+	retrieved bool
+}
+
+// NewEnvAWS returns a pointer to a new Credentials object
+// wrapping the environment variable provider.
+func NewEnvAWS() *Credentials {
+	return New(&EnvAWS{})
+}
+
+// Retrieve retrieves the keys from the environment.
+func (e *EnvAWS) Retrieve() (Value, error) {
+	e.retrieved = false
+
+	id := os.Getenv("AWS_ACCESS_KEY_ID")
+	if id == "" {
+		id = os.Getenv("AWS_ACCESS_KEY")
+	}
+
+	secret := os.Getenv("AWS_SECRET_ACCESS_KEY")
+	if secret == "" {
+		secret = os.Getenv("AWS_SECRET_KEY")
+	}
+
+	signerType := SignatureV4
+	if id == "" || secret == "" {
+		signerType = SignatureAnonymous
+	}
+
+	e.retrieved = true
+	return Value{
+		AccessKeyID:     id,
+		SecretAccessKey: secret,
+		SessionToken:    os.Getenv("AWS_SESSION_TOKEN"),
+		SignerType:      signerType,
+	}, nil
+}
+
+// IsExpired returns if the credentials have been retrieved.
+func (e *EnvAWS) IsExpired() bool {
+	return !e.retrieved
+}

vendor/github.com/minio/minio-go/pkg/credentials/env_minio.go

@@ -0,0 +1,62 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import "os"
+
+// A EnvMinio retrieves credentials from the environment variables of the
+// running process. EnvMinioironment credentials never expire.
+//
+// EnvMinioironment variables used:
+//
+// * Access Key ID:     MINIO_ACCESS_KEY.
+// * Secret Access Key: MINIO_SECRET_KEY.
+type EnvMinio struct {
+	retrieved bool
+}
+
+// NewEnvMinio returns a pointer to a new Credentials object
+// wrapping the environment variable provider.
+func NewEnvMinio() *Credentials {
+	return New(&EnvMinio{})
+}
+
+// Retrieve retrieves the keys from the environment.
+func (e *EnvMinio) Retrieve() (Value, error) {
+	e.retrieved = false
+
+	id := os.Getenv("MINIO_ACCESS_KEY")
+	secret := os.Getenv("MINIO_SECRET_KEY")
+
+	signerType := SignatureV4
+	if id == "" || secret == "" {
+		signerType = SignatureAnonymous
+	}
+
+	e.retrieved = true
+	return Value{
+		AccessKeyID:     id,
+		SecretAccessKey: secret,
+		SignerType:      signerType,
+	}, nil
+}
+
+// IsExpired returns if the credentials have been retrieved.
+func (e *EnvMinio) IsExpired() bool {
+	return !e.retrieved
+}

vendor/github.com/minio/minio-go/pkg/credentials/env_test.go

@@ -0,0 +1,105 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"os"
+	"reflect"
+	"testing"
+)
+
+func TestEnvAWSRetrieve(t *testing.T) {
+	os.Clearenv()
+	os.Setenv("AWS_ACCESS_KEY_ID", "access")
+	os.Setenv("AWS_SECRET_ACCESS_KEY", "secret")
+	os.Setenv("AWS_SESSION_TOKEN", "token")
+
+	e := EnvAWS{}
+	if !e.IsExpired() {
+		t.Error("Expect creds to be expired before retrieve.")
+	}
+
+	creds, err := e.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedCreds := Value{
+		AccessKeyID:     "access",
+		SecretAccessKey: "secret",
+		SessionToken:    "token",
+		SignerType:      SignatureV4,
+	}
+	if !reflect.DeepEqual(creds, expectedCreds) {
+		t.Errorf("Expected %v, got %v", expectedCreds, creds)
+	}
+
+	if e.IsExpired() {
+		t.Error("Expect creds to not be expired after retrieve.")
+	}
+
+	os.Clearenv()
+	os.Setenv("AWS_ACCESS_KEY", "access")
+	os.Setenv("AWS_SECRET_KEY", "secret")
+
+	expectedCreds = Value{
+		AccessKeyID:     "access",
+		SecretAccessKey: "secret",
+		SignerType:      SignatureV4,
+	}
+
+	creds, err = e.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !reflect.DeepEqual(creds, expectedCreds) {
+		t.Errorf("Expected %v, got %v", expectedCreds, creds)
+	}
+
+}
+
+func TestEnvMinioRetrieve(t *testing.T) {
+	os.Clearenv()
+
+	os.Setenv("MINIO_ACCESS_KEY", "access")
+	os.Setenv("MINIO_SECRET_KEY", "secret")
+
+	e := EnvMinio{}
+	if !e.IsExpired() {
+		t.Error("Expect creds to be expired before retrieve.")
+	}
+
+	creds, err := e.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expectedCreds := Value{
+		AccessKeyID:     "access",
+		SecretAccessKey: "secret",
+		SignerType:      SignatureV4,
+	}
+	if !reflect.DeepEqual(creds, expectedCreds) {
+		t.Errorf("Expected %v, got %v", expectedCreds, creds)
+	}
+
+	if e.IsExpired() {
+		t.Error("Expect creds to not be expired after retrieve.")
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/file_aws_credentials.go

@@ -0,0 +1,120 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/go-ini/ini"
+	homedir "github.com/minio/go-homedir"
+)
+
+// A FileAWSCredentials retrieves credentials from the current user's home
+// directory, and keeps track if those credentials are expired.
+//
+// Profile ini file example: $HOME/.aws/credentials
+type FileAWSCredentials struct {
+	// Path to the shared credentials file.
+	//
+	// If empty will look for "AWS_SHARED_CREDENTIALS_FILE" env variable. If the
+	// env value is empty will default to current user's home directory.
+	// Linux/OSX: "$HOME/.aws/credentials"
+	// Windows:   "%USERPROFILE%\.aws\credentials"
+	filename string
+
+	// AWS Profile to extract credentials from the shared credentials file. If empty
+	// will default to environment variable "AWS_PROFILE" or "default" if
+	// environment variable is also not set.
+	profile string
+
+	// retrieved states if the credentials have been successfully retrieved.
+	retrieved bool
+}
+
+// NewFileAWSCredentials returns a pointer to a new Credentials object
+// wrapping the Profile file provider.
+func NewFileAWSCredentials(filename string, profile string) *Credentials {
+	return New(&FileAWSCredentials{
+		filename: filename,
+		profile:  profile,
+	})
+}
+
+// Retrieve reads and extracts the shared credentials from the current
+// users home directory.
+func (p *FileAWSCredentials) Retrieve() (Value, error) {
+	if p.filename == "" {
+		p.filename = os.Getenv("AWS_SHARED_CREDENTIALS_FILE")
+		if p.filename == "" {
+			homeDir, err := homedir.Dir()
+			if err != nil {
+				return Value{}, err
+			}
+			p.filename = filepath.Join(homeDir, ".aws", "credentials")
+		}
+	}
+	if p.profile == "" {
+		p.profile = os.Getenv("AWS_PROFILE")
+		if p.profile == "" {
+			p.profile = "default"
+		}
+	}
+
+	p.retrieved = false
+
+	iniProfile, err := loadProfile(p.filename, p.profile)
+	if err != nil {
+		return Value{}, err
+	}
+
+	// Default to empty string if not found.
+	id := iniProfile.Key("aws_access_key_id")
+	// Default to empty string if not found.
+	secret := iniProfile.Key("aws_secret_access_key")
+	// Default to empty string if not found.
+	token := iniProfile.Key("aws_session_token")
+
+	p.retrieved = true
+	return Value{
+		AccessKeyID:     id.String(),
+		SecretAccessKey: secret.String(),
+		SessionToken:    token.String(),
+		SignerType:      SignatureV4,
+	}, nil
+}
+
+// IsExpired returns if the shared credentials have expired.
+func (p *FileAWSCredentials) IsExpired() bool {
+	return !p.retrieved
+}
+
+// loadProfiles loads from the file pointed to by shared credentials filename for profile.
+// The credentials retrieved from the profile will be returned or error. Error will be
+// returned if it fails to read from the file, or the data is invalid.
+func loadProfile(filename, profile string) (*ini.Section, error) {
+	config, err := ini.Load(filename)
+	if err != nil {
+		return nil, err
+	}
+	iniProfile, err := config.GetSection(profile)
+	if err != nil {
+		return nil, err
+	}
+	return iniProfile, nil
+}

vendor/github.com/minio/minio-go/pkg/credentials/file_minio_client.go

@@ -0,0 +1,129 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	homedir "github.com/minio/go-homedir"
+)
+
+// A FileMinioClient retrieves credentials from the current user's home
+// directory, and keeps track if those credentials are expired.
+//
+// Configuration file example: $HOME/.mc/config.json
+type FileMinioClient struct {
+	// Path to the shared credentials file.
+	//
+	// If empty will look for "MINIO_SHARED_CREDENTIALS_FILE" env variable. If the
+	// env value is empty will default to current user's home directory.
+	// Linux/OSX: "$HOME/.mc/config.json"
+	// Windows:   "%USERALIAS%\mc\config.json"
+	filename string
+
+	// Minio Alias to extract credentials from the shared credentials file. If empty
+	// will default to environment variable "MINIO_ALIAS" or "default" if
+	// environment variable is also not set.
+	alias string
+
+	// retrieved states if the credentials have been successfully retrieved.
+	retrieved bool
+}
+
+// NewFileMinioClient returns a pointer to a new Credentials object
+// wrapping the Alias file provider.
+func NewFileMinioClient(filename string, alias string) *Credentials {
+	return New(&FileMinioClient{
+		filename: filename,
+		alias:    alias,
+	})
+}
+
+// Retrieve reads and extracts the shared credentials from the current
+// users home directory.
+func (p *FileMinioClient) Retrieve() (Value, error) {
+	if p.filename == "" {
+		homeDir, err := homedir.Dir()
+		if err != nil {
+			return Value{}, err
+		}
+		p.filename = filepath.Join(homeDir, ".mc", "config.json")
+		if runtime.GOOS == "windows" {
+			p.filename = filepath.Join(homeDir, "mc", "config.json")
+		}
+	}
+
+	if p.alias == "" {
+		p.alias = os.Getenv("MINIO_ALIAS")
+		if p.alias == "" {
+			p.alias = "s3"
+		}
+	}
+
+	p.retrieved = false
+
+	hostCfg, err := loadAlias(p.filename, p.alias)
+	if err != nil {
+		return Value{}, err
+	}
+
+	p.retrieved = true
+	return Value{
+		AccessKeyID:     hostCfg.AccessKey,
+		SecretAccessKey: hostCfg.SecretKey,
+		SignerType:      parseSignatureType(hostCfg.API),
+	}, nil
+}
+
+// IsExpired returns if the shared credentials have expired.
+func (p *FileMinioClient) IsExpired() bool {
+	return !p.retrieved
+}
+
+// hostConfig configuration of a host.
+type hostConfig struct {
+	URL       string `json:"url"`
+	AccessKey string `json:"accessKey"`
+	SecretKey string `json:"secretKey"`
+	API       string `json:"api"`
+}
+
+// config config version.
+type config struct {
+	Version string                `json:"version"`
+	Hosts   map[string]hostConfig `json:"hosts"`
+}
+
+// loadAliass loads from the file pointed to by shared credentials filename for alias.
+// The credentials retrieved from the alias will be returned or error. Error will be
+// returned if it fails to read from the file.
+func loadAlias(filename, alias string) (hostConfig, error) {
+	cfg := &config{}
+	configBytes, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return hostConfig{}, err
+	}
+	if err = json.Unmarshal(configBytes, cfg); err != nil {
+		return hostConfig{}, err
+	}
+	return cfg.Hosts[alias], nil
+}

vendor/github.com/minio/minio-go/pkg/credentials/file_test.go

@@ -0,0 +1,189 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestFileAWS(t *testing.T) {
+	os.Clearenv()
+
+	creds := NewFileAWSCredentials("credentials.sample", "")
+	credValues, err := creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "accessKey" {
+		t.Errorf("Expected 'accessKey', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "secret" {
+		t.Errorf("Expected 'secret', got %s'", credValues.SecretAccessKey)
+	}
+	if credValues.SessionToken != "token" {
+		t.Errorf("Expected 'token', got %s'", credValues.SessionToken)
+	}
+
+	os.Setenv("AWS_SHARED_CREDENTIALS_FILE", "credentials.sample")
+	creds = NewFileAWSCredentials("", "")
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "accessKey" {
+		t.Errorf("Expected 'accessKey', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "secret" {
+		t.Errorf("Expected 'secret', got %s'", credValues.SecretAccessKey)
+	}
+	if credValues.SessionToken != "token" {
+		t.Errorf("Expected 'token', got %s'", credValues.SessionToken)
+	}
+
+	wd, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	os.Setenv("AWS_SHARED_CREDENTIALS_FILE", filepath.Join(wd, "credentials.sample"))
+	creds = NewFileAWSCredentials("", "")
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "accessKey" {
+		t.Errorf("Expected 'accessKey', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "secret" {
+		t.Errorf("Expected 'secret', got %s'", credValues.SecretAccessKey)
+	}
+	if credValues.SessionToken != "token" {
+		t.Errorf("Expected 'token', got %s'", credValues.SessionToken)
+	}
+
+	os.Clearenv()
+	os.Setenv("AWS_PROFILE", "no_token")
+
+	creds = NewFileAWSCredentials("credentials.sample", "")
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "accessKey" {
+		t.Errorf("Expected 'accessKey', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "secret" {
+		t.Errorf("Expected 'secret', got %s'", credValues.SecretAccessKey)
+	}
+
+	os.Clearenv()
+
+	creds = NewFileAWSCredentials("credentials.sample", "no_token")
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "accessKey" {
+		t.Errorf("Expected 'accessKey', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "secret" {
+		t.Errorf("Expected 'secret', got %s'", credValues.SecretAccessKey)
+	}
+
+	creds = NewFileAWSCredentials("credentials-non-existent.sample", "no_token")
+	_, err = creds.Get()
+	if !os.IsNotExist(err) {
+		t.Errorf("Expected open non-existent.json: no such file or directory, got %s", err)
+	}
+	if !creds.IsExpired() {
+		t.Error("Should be expired if not loaded")
+	}
+}
+
+func TestFileMinioClient(t *testing.T) {
+	os.Clearenv()
+
+	creds := NewFileMinioClient("config.json.sample", "")
+	credValues, err := creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "accessKey" {
+		t.Errorf("Expected 'accessKey', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "secret" {
+		t.Errorf("Expected 'secret', got %s'", credValues.SecretAccessKey)
+	}
+	if credValues.SignerType != SignatureV4 {
+		t.Errorf("Expected 'S3v4', got %s'", credValues.SignerType)
+	}
+
+	os.Clearenv()
+	os.Setenv("MINIO_ALIAS", "play")
+
+	creds = NewFileMinioClient("config.json.sample", "")
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "Q3AM3UQ867SPQQA43P2F" {
+		t.Errorf("Expected 'Q3AM3UQ867SPQQA43P2F', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG" {
+		t.Errorf("Expected 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG', got %s'", credValues.SecretAccessKey)
+	}
+	if credValues.SignerType != SignatureV2 {
+		t.Errorf("Expected 'S3v2', got %s'", credValues.SignerType)
+	}
+
+	os.Clearenv()
+
+	creds = NewFileMinioClient("config.json.sample", "play")
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if credValues.AccessKeyID != "Q3AM3UQ867SPQQA43P2F" {
+		t.Errorf("Expected 'Q3AM3UQ867SPQQA43P2F', got %s'", credValues.AccessKeyID)
+	}
+	if credValues.SecretAccessKey != "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG" {
+		t.Errorf("Expected 'zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG', got %s'", credValues.SecretAccessKey)
+	}
+	if credValues.SignerType != SignatureV2 {
+		t.Errorf("Expected 'S3v2', got %s'", credValues.SignerType)
+	}
+
+	creds = NewFileMinioClient("non-existent.json", "play")
+	_, err = creds.Get()
+	if !os.IsNotExist(err) {
+		t.Errorf("Expected open non-existent.json: no such file or directory, got %s", err)
+	}
+	if !creds.IsExpired() {
+		t.Error("Should be expired if not loaded")
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/iam_aws.go

@@ -0,0 +1,196 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import (
+	"bufio"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/url"
+	"path"
+	"time"
+)
+
+// DefaultExpiryWindow - Default expiry window.
+// ExpiryWindow will allow the credentials to trigger refreshing
+// prior to the credentials actually expiring. This is beneficial
+// so race conditions with expiring credentials do not cause
+// request to fail unexpectedly due to ExpiredTokenException exceptions.
+const DefaultExpiryWindow = time.Second * 10 // 10 secs
+
+// A IAM retrieves credentials from the EC2 service, and keeps track if
+// those credentials are expired.
+type IAM struct {
+	Expiry
+
+	// Required http Client to use when connecting to IAM metadata service.
+	Client *http.Client
+
+	// Custom endpoint in place of
+	endpoint string
+}
+
+// redirectHeaders copies all headers when following a redirect URL.
+// This won't be needed anymore from go 1.8 (https://github.com/golang/go/issues/4800)
+func redirectHeaders(req *http.Request, via []*http.Request) error {
+	if len(via) == 0 {
+		return nil
+	}
+	for key, val := range via[0].Header {
+		req.Header[key] = val
+	}
+	return nil
+}
+
+// NewIAM returns a pointer to a new Credentials object wrapping
+// the IAM. Takes a ConfigProvider to create a EC2Metadata client.
+// The ConfigProvider is satisfied by the session.Session type.
+func NewIAM(endpoint string) *Credentials {
+	if endpoint == "" {
+		// IAM Roles for Amazon EC2
+		// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html
+		endpoint = "http://169.254.169.254"
+	}
+	p := &IAM{
+		Client: &http.Client{
+			Transport:     http.DefaultTransport,
+			CheckRedirect: redirectHeaders,
+		},
+		endpoint: endpoint,
+	}
+	return New(p)
+}
+
+// Retrieve retrieves credentials from the EC2 service.
+// Error will be returned if the request fails, or unable to extract
+// the desired
+func (m *IAM) Retrieve() (Value, error) {
+	credsList, err := requestCredList(m.Client, m.endpoint)
+	if err != nil {
+		return Value{}, err
+	}
+
+	if len(credsList) == 0 {
+		return Value{}, errors.New("empty EC2 Role list")
+	}
+	credsName := credsList[0]
+
+	roleCreds, err := requestCred(m.Client, m.endpoint, credsName)
+	if err != nil {
+		return Value{}, err
+	}
+
+	// Expiry window is set to 10secs.
+	m.SetExpiration(roleCreds.Expiration, DefaultExpiryWindow)
+
+	return Value{
+		AccessKeyID:     roleCreds.AccessKeyID,
+		SecretAccessKey: roleCreds.SecretAccessKey,
+		SessionToken:    roleCreds.Token,
+		SignerType:      SignatureV4,
+	}, nil
+}
+
+// A ec2RoleCredRespBody provides the shape for unmarshaling credential
+// request responses.
+type ec2RoleCredRespBody struct {
+	// Success State
+	Expiration      time.Time
+	AccessKeyID     string
+	SecretAccessKey string
+	Token           string
+
+	// Error state
+	Code    string
+	Message string
+}
+
+const iamSecurityCredsPath = "/latest/meta-data/iam/security-credentials"
+
+// requestCredList requests a list of credentials from the EC2 service.
+// If there are no credentials, or there is an error making or receiving the request
+func requestCredList(client *http.Client, endpoint string) ([]string, error) {
+	u, err := url.Parse(endpoint)
+	if err != nil {
+		return nil, err
+	}
+	u.Path = iamSecurityCredsPath
+	req, err := http.NewRequest("GET", u.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, errors.New(resp.Status)
+	}
+
+	credsList := []string{}
+	s := bufio.NewScanner(resp.Body)
+	for s.Scan() {
+		credsList = append(credsList, s.Text())
+	}
+
+	if err := s.Err(); err != nil {
+		return nil, err
+	}
+
+	return credsList, nil
+}
+
+// requestCred requests the credentials for a specific credentials from the EC2 service.
+//
+// If the credentials cannot be found, or there is an error reading the response
+// and error will be returned.
+func requestCred(client *http.Client, endpoint string, credsName string) (ec2RoleCredRespBody, error) {
+	u, err := url.Parse(endpoint)
+	if err != nil {
+		return ec2RoleCredRespBody{}, err
+	}
+
+	u.Path = path.Join(iamSecurityCredsPath, credsName)
+	req, err := http.NewRequest("GET", u.String(), nil)
+	if err != nil {
+		return ec2RoleCredRespBody{}, err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return ec2RoleCredRespBody{}, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return ec2RoleCredRespBody{}, errors.New(resp.Status)
+	}
+
+	respCreds := ec2RoleCredRespBody{}
+	if err := json.NewDecoder(resp.Body).Decode(&respCreds); err != nil {
+		return ec2RoleCredRespBody{}, err
+	}
+
+	if respCreds.Code != "Success" {
+		// If an error code was returned something failed requesting the role.
+		return ec2RoleCredRespBody{}, errors.New(respCreds.Message)
+	}
+
+	return respCreds, nil
+}

vendor/github.com/minio/minio-go/pkg/credentials/iam_aws_test.go

@@ -0,0 +1,180 @@
+package credentials
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+const credsRespTmpl = `{
+  "Code": "Success",
+  "Type": "AWS-HMAC",
+  "AccessKeyId" : "accessKey",
+  "SecretAccessKey" : "secret",
+  "Token" : "token",
+  "Expiration" : "%s",
+  "LastUpdated" : "2009-11-23T0:00:00Z"
+}`
+
+const credsFailRespTmpl = `{
+  "Code": "ErrorCode",
+  "Message": "ErrorMsg",
+  "LastUpdated": "2009-11-23T0:00:00Z"
+}`
+
+func initTestFailServer() *httptest.Server {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		http.Error(w, "Not allowed", http.StatusBadRequest)
+	}))
+	return server
+}
+
+func initTestServerNoRoles() *httptest.Server {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte(""))
+	}))
+	return server
+}
+
+func initTestServer(expireOn string, failAssume bool) *httptest.Server {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/latest/meta-data/iam/security-credentials" {
+			fmt.Fprintln(w, "RoleName")
+		} else if r.URL.Path == "/latest/meta-data/iam/security-credentials/RoleName" {
+			if failAssume {
+				fmt.Fprintf(w, credsFailRespTmpl)
+			} else {
+				fmt.Fprintf(w, credsRespTmpl, expireOn)
+			}
+		} else {
+			http.Error(w, "bad request", http.StatusBadRequest)
+		}
+	}))
+
+	return server
+}
+
+func TestIAMMalformedEndpoint(t *testing.T) {
+	creds := NewIAM("%%%%")
+	_, err := creds.Get()
+	if err == nil {
+		t.Fatal("Unexpected should fail here")
+	}
+	if err.Error() != `parse %%%%: invalid URL escape "%%%"` {
+		t.Fatalf("Expected parse %%%%%%%%: invalid URL escape \"%%%%%%\", got %s", err)
+	}
+}
+
+func TestIAMFailServer(t *testing.T) {
+	server := initTestFailServer()
+	defer server.Close()
+
+	creds := NewIAM(server.URL)
+
+	_, err := creds.Get()
+	if err == nil {
+		t.Fatal("Unexpected should fail here")
+	}
+	if err.Error() != "400 Bad Request" {
+		t.Fatalf("Expected '400 Bad Request', got %s", err)
+	}
+}
+
+func TestIAMNoRoles(t *testing.T) {
+	server := initTestServerNoRoles()
+	defer server.Close()
+
+	creds := NewIAM(server.URL)
+	_, err := creds.Get()
+	if err == nil {
+		t.Fatal("Unexpected should fail here")
+	}
+	if err.Error() != "empty EC2 Role list" {
+		t.Fatalf("Expected 'empty EC2 Role list', got %s", err)
+	}
+}
+
+func TestIAM(t *testing.T) {
+	server := initTestServer("2014-12-16T01:51:37Z", false)
+	defer server.Close()
+
+	p := &IAM{
+		Client:   http.DefaultClient,
+		endpoint: server.URL,
+	}
+
+	creds, err := p.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if "accessKey" != creds.AccessKeyID {
+		t.Errorf("Expected \"accessKey\", got %s", creds.AccessKeyID)
+	}
+
+	if "secret" != creds.SecretAccessKey {
+		t.Errorf("Expected \"secret\", got %s", creds.SecretAccessKey)
+	}
+
+	if "token" != creds.SessionToken {
+		t.Errorf("Expected \"token\", got %s", creds.SessionToken)
+	}
+
+	if !p.IsExpired() {
+		t.Error("Expected creds to be expired.")
+	}
+}
+
+func TestIAMFailAssume(t *testing.T) {
+	server := initTestServer("2014-12-16T01:51:37Z", true)
+	defer server.Close()
+
+	p := &IAM{
+		Client:   http.DefaultClient,
+		endpoint: server.URL,
+	}
+
+	_, err := p.Retrieve()
+	if err == nil {
+		t.Fatal("Unexpected success, should fail")
+	}
+	if err.Error() != "ErrorMsg" {
+		t.Errorf("Expected \"ErrorMsg\", got %s", err)
+	}
+}
+
+func TestIAMIsExpired(t *testing.T) {
+	server := initTestServer("2014-12-16T01:51:37Z", false)
+	defer server.Close()
+
+	p := &IAM{
+		Client:   http.DefaultClient,
+		endpoint: server.URL,
+	}
+	p.CurrentTime = func() time.Time {
+		return time.Date(2014, 12, 15, 21, 26, 0, 0, time.UTC)
+	}
+
+	if !p.IsExpired() {
+		t.Error("Expected creds to be expired before retrieve.")
+	}
+
+	_, err := p.Retrieve()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if p.IsExpired() {
+		t.Error("Expected creds to not be expired after retrieve.")
+	}
+
+	p.CurrentTime = func() time.Time {
+		return time.Date(3014, 12, 15, 21, 26, 0, 0, time.UTC)
+	}
+
+	if !p.IsExpired() {
+		t.Error("Expected creds to be expired when curren time has changed")
+	}
+}

vendor/github.com/minio/minio-go/pkg/credentials/signature-type.go

@@ -0,0 +1,76 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import "strings"
+
+// SignatureType is type of Authorization requested for a given HTTP request.
+type SignatureType int
+
+// Different types of supported signatures - default is SignatureV4 or SignatureDefault.
+const (
+	// SignatureDefault is always set to v4.
+	SignatureDefault SignatureType = iota
+	SignatureV4
+	SignatureV2
+	SignatureV4Streaming
+	SignatureAnonymous // Anonymous signature signifies, no signature.
+)
+
+// IsV2 - is signature SignatureV2?
+func (s SignatureType) IsV2() bool {
+	return s == SignatureV2
+}
+
+// IsV4 - is signature SignatureV4?
+func (s SignatureType) IsV4() bool {
+	return s == SignatureV4 || s == SignatureDefault
+}
+
+// IsStreamingV4 - is signature SignatureV4Streaming?
+func (s SignatureType) IsStreamingV4() bool {
+	return s == SignatureV4Streaming
+}
+
+// IsAnonymous - is signature empty?
+func (s SignatureType) IsAnonymous() bool {
+	return s == SignatureAnonymous
+}
+
+// Stringer humanized version of signature type,
+// strings returned here are case insensitive.
+func (s SignatureType) String() string {
+	if s.IsV2() {
+		return "S3v2"
+	} else if s.IsV4() {
+		return "S3v4"
+	} else if s.IsStreamingV4() {
+		return "S3v4Streaming"
+	}
+	return "Anonymous"
+}
+
+func parseSignatureType(str string) SignatureType {
+	if strings.EqualFold(str, "S3v4") {
+		return SignatureV4
+	} else if strings.EqualFold(str, "S3v2") {
+		return SignatureV2
+	} else if strings.EqualFold(str, "S3v4Streaming") {
+		return SignatureV4Streaming
+	}
+	return SignatureAnonymous
+}

vendor/github.com/minio/minio-go/pkg/credentials/static.go

@@ -0,0 +1,67 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+// A Static is a set of credentials which are set programmatically,
+// and will never expire.
+type Static struct {
+	Value
+}
+
+// NewStaticV2 returns a pointer to a new Credentials object
+// wrapping a static credentials value provider, signature is
+// set to v2. If access and secret are not specified then
+// regardless of signature type set it Value will return
+// as anonymous.
+func NewStaticV2(id, secret, token string) *Credentials {
+	return NewStatic(id, secret, token, SignatureV2)
+}
+
+// NewStaticV4 is similar to NewStaticV2 with similar considerations.
+func NewStaticV4(id, secret, token string) *Credentials {
+	return NewStatic(id, secret, token, SignatureV4)
+}
+
+// NewStatic returns a pointer to a new Credentials object
+// wrapping a static credentials value provider.
+func NewStatic(id, secret, token string, signerType SignatureType) *Credentials {
+	return New(&Static{
+		Value: Value{
+			AccessKeyID:     id,
+			SecretAccessKey: secret,
+			SessionToken:    token,
+			SignerType:      signerType,
+		},
+	})
+}
+
+// Retrieve returns the static credentials.
+func (s *Static) Retrieve() (Value, error) {
+	if s.AccessKeyID == "" || s.SecretAccessKey == "" {
+		// Anonymous is not an error
+		return Value{SignerType: SignatureAnonymous}, nil
+	}
+	return s.Value, nil
+}
+
+// IsExpired returns if the credentials are expired.
+//
+// For Static, the credentials never expired.
+func (s *Static) IsExpired() bool {
+	return false
+}

vendor/github.com/minio/minio-go/pkg/credentials/static_test.go

@@ -0,0 +1,68 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package credentials
+
+import "testing"
+
+func TestStaticGet(t *testing.T) {
+	creds := NewStatic("UXHW", "SECRET", "", SignatureV4)
+	credValues, err := creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if "UXHW" != credValues.AccessKeyID {
+		t.Errorf("Expected access key ID to match \"UXHW\", got %s", credValues.AccessKeyID)
+	}
+	if "SECRET" != credValues.SecretAccessKey {
+		t.Errorf("Expected secret access key to match \"SECRET\", got %s", credValues.SecretAccessKey)
+	}
+
+	if credValues.SessionToken != "" {
+		t.Error("Expected session token to match")
+	}
+
+	if credValues.SignerType != SignatureV4 {
+		t.Errorf("Expected 'S3v4', got %s", credValues.SignerType)
+	}
+
+	if creds.IsExpired() {
+		t.Error("Static credentials should never expire")
+	}
+
+	creds = NewStatic("", "", "", SignatureDefault)
+	credValues, err = creds.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if "" != credValues.AccessKeyID {
+		t.Errorf("Expected access key ID to match empty string, got %s", credValues.AccessKeyID)
+	}
+	if "" != credValues.SecretAccessKey {
+		t.Errorf("Expected secret access key to match empty string, got %s", credValues.SecretAccessKey)
+	}
+
+	if !credValues.SignerType.IsAnonymous() {
+		t.Errorf("Expected 'Anonymous', got %s", credValues.SignerType)
+	}
+
+	if creds.IsExpired() {
+		t.Error("Static credentials should never expire")
+	}
+}

vendor/github.com/minio/minio-go/pkg/s3signer/request-signature-streaming.go

@@ -92,9 +92,12 @@ func buildChunkStringToSign(t time.Time, region, previousSig string, chunkData [
 
 // prepareStreamingRequest - prepares a request with appropriate
 // headers before computing the seed signature.
-func prepareStreamingRequest(req *http.Request, dataLen int64, timestamp time.Time) {
+func prepareStreamingRequest(req *http.Request, sessionToken string, dataLen int64, timestamp time.Time) {
 	// Set x-amz-content-sha256 header.
 	req.Header.Set("X-Amz-Content-Sha256", streamingSignAlgorithm)
+	if sessionToken != "" {
+		req.Header.Set("X-Amz-Security-Token", sessionToken)
+	}
 	req.Header.Set("Content-Encoding", streamingEncoding)
 	req.Header.Set("X-Amz-Date", timestamp.Format(iso8601DateFormat))
 
@@ -138,6 +141,7 @@ func (s *StreamingReader) setSeedSignature(req *http.Request) {
 type StreamingReader struct {
 	accessKeyID     string
 	secretAccessKey string
+	sessionToken    string
 	region          string
 	prevSignature   string
 	seedSignature   string
@@ -195,16 +199,17 @@ func (s *StreamingReader) setStreamingAuthHeader(req *http.Request) {
 
 // StreamingSignV4 - provides chunked upload signatureV4 support by
 // implementing io.Reader.
-func StreamingSignV4(req *http.Request, accessKeyID, secretAccessKey,
+func StreamingSignV4(req *http.Request, accessKeyID, secretAccessKey, sessionToken,
 	region string, dataLen int64, reqTime time.Time) *http.Request {
 
 	// Set headers needed for streaming signature.
-	prepareStreamingRequest(req, dataLen, reqTime)
+	prepareStreamingRequest(req, sessionToken, dataLen, reqTime)
 
 	stReader := &StreamingReader{
 		baseReadCloser:  req.Body,
 		accessKeyID:     accessKeyID,
 		secretAccessKey: secretAccessKey,
+		sessionToken:    sessionToken,
 		region:          region,
 		reqTime:         reqTime,
 		chunkBuf:        make([]byte, payloadChunkSize),

vendor/github.com/minio/minio-go/pkg/s3signer/request-signature-streaming_test.go

@@ -39,7 +39,7 @@ func TestGetSeedSignature(t *testing.T) {
 		t.Fatalf("Failed to parse time - %v", err)
 	}
 
-	req = StreamingSignV4(req, accessKeyID, secretAccessKeyID, "us-east-1", int64(dataLen), reqTime)
+	req = StreamingSignV4(req, accessKeyID, secretAccessKeyID, "", "us-east-1", int64(dataLen), reqTime)
 	actualSeedSignature := req.Body.(*StreamingReader).seedSignature
 
 	expectedSeedSignature := "007480502de61457e955731b0f5d191f7e6f54a8a0f6cc7974a5ebd887965686"
@@ -72,7 +72,7 @@ func TestSetStreamingAuthorization(t *testing.T) {
 
 	dataLen := int64(65 * 1024)
 	reqTime, _ := time.Parse(iso8601DateFormat, "20130524T000000Z")
-	req = StreamingSignV4(req, accessKeyID, secretAccessKeyID, location, dataLen, reqTime)
+	req = StreamingSignV4(req, accessKeyID, secretAccessKeyID, "", location, dataLen, reqTime)
 
 	expectedAuthorization := "AWS4-HMAC-SHA256 Credential=AKIAIOSFODNN7EXAMPLE/20130524/us-east-1/s3/aws4_request,SignedHeaders=content-encoding;host;x-amz-content-sha256;x-amz-date;x-amz-decoded-content-length;x-amz-storage-class,Signature=007480502de61457e955731b0f5d191f7e6f54a8a0f6cc7974a5ebd887965686"
 
@@ -96,7 +96,7 @@ func TestStreamingReader(t *testing.T) {
 
 	baseReader := ioutil.NopCloser(bytes.NewReader(bytes.Repeat([]byte("a"), 65*1024)))
 	req.Body = baseReader
-	req = StreamingSignV4(req, accessKeyID, secretAccessKeyID, location, dataLen, reqTime)
+	req = StreamingSignV4(req, accessKeyID, secretAccessKeyID, "", location, dataLen, reqTime)
 
 	b, err := ioutil.ReadAll(req.Body)
 	if err != nil {

vendor/github.com/minio/minio-go/pkg/s3signer/request-signature-v4.go

@@ -206,7 +206,7 @@ func getStringToSignV4(t time.Time, location, canonicalRequest string) string {
 
 // PreSignV4 presign the request, in accordance with
 // http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html.
-func PreSignV4(req http.Request, accessKeyID, secretAccessKey, location string, expires int64) *http.Request {
+func PreSignV4(req http.Request, accessKeyID, secretAccessKey, sessionToken, location string, expires int64) *http.Request {
 	// Presign is not needed for anonymous credentials.
 	if accessKeyID == "" || secretAccessKey == "" {
 		return &req
@@ -228,6 +228,10 @@ func PreSignV4(req http.Request, accessKeyID, secretAccessKey, location string,
 	query.Set("X-Amz-Expires", strconv.FormatInt(expires, 10))
 	query.Set("X-Amz-SignedHeaders", signedHeaders)
 	query.Set("X-Amz-Credential", credential)
+	// Set session token if available.
+	if sessionToken != "" {
+		query.Set("X-Amz-Security-Token", sessionToken)
+	}
 	req.URL.RawQuery = query.Encode()
 
 	// Get canonical request.
@@ -260,7 +264,7 @@ func PostPresignSignatureV4(policyBase64 string, t time.Time, secretAccessKey, l
 
 // SignV4 sign the request before Do(), in accordance with
 // http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html.
-func SignV4(req http.Request, accessKeyID, secretAccessKey, location string) *http.Request {
+func SignV4(req http.Request, accessKeyID, secretAccessKey, sessionToken, location string) *http.Request {
 	// Signature calculation is not needed for anonymous credentials.
 	if accessKeyID == "" || secretAccessKey == "" {
 		return &req
@@ -272,6 +276,11 @@ func SignV4(req http.Request, accessKeyID, secretAccessKey, location string) *ht
 	// Set x-amz-date.
 	req.Header.Set("X-Amz-Date", t.Format(iso8601DateFormat))
 
+	// Set session token if available.
+	if sessionToken != "" {
+		req.Header.Set("X-Amz-Security-Token", sessionToken)
+	}
+
 	// Get canonical request.
 	canonicalRequest := getCanonicalRequest(req, v4IgnoredHeaders)
 

vendor/github.com/minio/minio-go/pkg/s3signer/request-signature_test.go

@@ -28,12 +28,12 @@ func TestSignatureCalculation(t *testing.T) {
 	if err != nil {
 		t.Fatal("Error:", err)
 	}
-	req = SignV4(*req, "", "", "us-east-1")
+	req = SignV4(*req, "", "", "", "us-east-1")
 	if req.Header.Get("Authorization") != "" {
 		t.Fatal("Error: anonymous credentials should not have Authorization header.")
 	}
 
-	req = PreSignV4(*req, "", "", "us-east-1", 0)
+	req = PreSignV4(*req, "", "", "", "us-east-1", 0)
 	if strings.Contains(req.URL.RawQuery, "X-Amz-Signature") {
 		t.Fatal("Error: anonymous credentials should not have Signature query resource.")
 	}
@@ -48,12 +48,12 @@ func TestSignatureCalculation(t *testing.T) {
 		t.Fatal("Error: anonymous credentials should not have Signature query resource.")
 	}
 
-	req = SignV4(*req, "ACCESS-KEY", "SECRET-KEY", "us-east-1")
+	req = SignV4(*req, "ACCESS-KEY", "SECRET-KEY", "", "us-east-1")
 	if req.Header.Get("Authorization") == "" {
 		t.Fatal("Error: normal credentials should have Authorization header.")
 	}
 
-	req = PreSignV4(*req, "ACCESS-KEY", "SECRET-KEY", "us-east-1", 0)
+	req = PreSignV4(*req, "ACCESS-KEY", "SECRET-KEY", "", "us-east-1", 0)
 	if !strings.Contains(req.URL.RawQuery, "X-Amz-Signature") {
 		t.Fatal("Error: normal credentials should have Signature query resource.")
 	}

vendor/github.com/minio/minio-go/request-headers.go

@@ -48,7 +48,7 @@ func (c RequestHeaders) SetMatchETag(etag string) error {
 	if etag == "" {
 		return ErrInvalidArgument("ETag cannot be empty.")
 	}
-	c.Set("If-Match", etag)
+	c.Set("If-Match", "\""+etag+"\"")
 	return nil
 }
 
@@ -57,7 +57,7 @@ func (c RequestHeaders) SetMatchETagExcept(etag string) error {
 	if etag == "" {
 		return ErrInvalidArgument("ETag cannot be empty.")
 	}
-	c.Set("If-None-Match", etag)
+	c.Set("If-None-Match", "\""+etag+"\"")
 	return nil
 }
 

vendor/github.com/minio/minio-go/s3-error.go

@@ -25,7 +25,7 @@ var s3ErrorResponseMap = map[string]string{
 	"EntityTooLarge":                    "Your proposed upload exceeds the maximum allowed object size.",
 	"IncompleteBody":                    "You did not provide the number of bytes specified by the Content-Length HTTP header.",
 	"InternalError":                     "We encountered an internal error, please try again.",
-	"InvalidAccessKeyID":                "The access key ID you provided does not exist in our records.",
+	"InvalidAccessKeyId":                "The access key ID you provided does not exist in our records.",
 	"InvalidBucketName":                 "The specified bucket is not valid.",
 	"InvalidDigest":                     "The Content-Md5 you specified is not valid.",
 	"InvalidRange":                      "The requested range is not satisfiable",

vendor/github.com/minio/minio-go/signature-type.go

@@ -1,45 +0,0 @@
-/*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package minio
-
-// SignatureType is type of Authorization requested for a given HTTP request.
-type SignatureType int
-
-// Different types of supported signatures - default is Latest i.e SignatureV4.
-const (
-	Latest SignatureType = iota
-	SignatureV4
-	SignatureV2
-	SignatureV4Streaming
-)
-
-var emptySHA256 = sum256(nil)
-
-// isV2 - is signature SignatureV2?
-func (s SignatureType) isV2() bool {
-	return s == SignatureV2
-}
-
-// isV4 - is signature SignatureV4?
-func (s SignatureType) isV4() bool {
-	return s == SignatureV4 || s == Latest
-}
-
-// isStreamingV4 - is signature SignatureV4Streaming?
-func (s SignatureType) isStreamingV4() bool {
-	return s == SignatureV4Streaming
-}

vendor/github.com/minio/minio-go/utils.go

@@ -110,6 +110,8 @@ func closeResponse(resp *http.Response) {
 	}
 }
 
+var emptySHA256 = sum256(nil)
+
 // Sentinel URL is the default url value which is invalid.
 var sentinelURL = url.URL{}
 

vendor/github.com/pkg/errors/.gitignore

@@ -0,0 +1,24 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof

vendor/github.com/pkg/errors/.travis.yml

@@ -0,0 +1,11 @@
+language: go
+go_import_path: github.com/pkg/errors
+go:
+  - 1.4.3
+  - 1.5.4
+  - 1.6.2
+  - 1.7.1
+  - tip
+
+script:
+  - go test -v ./...

vendor/github.com/pkg/errors/LICENSE

@@ -0,0 +1,23 @@
+Copyright (c) 2015, Dave Cheney <dave@cheney.net>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/pkg/errors/README.md

@@ -0,0 +1,52 @@
+# errors [![Travis-CI](https://travis-ci.org/pkg/errors.svg)](https://travis-ci.org/pkg/errors) [![AppVeyor](https://ci.appveyor.com/api/projects/status/b98mptawhudj53ep/branch/master?svg=true)](https://ci.appveyor.com/project/davecheney/errors/branch/master) [![GoDoc](https://godoc.org/github.com/pkg/errors?status.svg)](http://godoc.org/github.com/pkg/errors) [![Report card](https://goreportcard.com/badge/github.com/pkg/errors)](https://goreportcard.com/report/github.com/pkg/errors)
+
+Package errors provides simple error handling primitives.
+
+`go get github.com/pkg/errors`
+
+The traditional error handling idiom in Go is roughly akin to
+```go
+if err != nil {
+        return err
+}
+```
+which applied recursively up the call stack results in error reports without context or debugging information. The errors package allows programmers to add context to the failure path in their code in a way that does not destroy the original value of the error.
+
+## Adding context to an error
+
+The errors.Wrap function returns a new error that adds context to the original error. For example
+```go
+_, err := ioutil.ReadAll(r)
+if err != nil {
+        return errors.Wrap(err, "read failed")
+}
+```
+## Retrieving the cause of an error
+
+Using `errors.Wrap` constructs a stack of errors, adding context to the preceding error. Depending on the nature of the error it may be necessary to reverse the operation of errors.Wrap to retrieve the original error for inspection. Any error value which implements this interface can be inspected by `errors.Cause`.
+```go
+type causer interface {
+        Cause() error
+}
+```
+`errors.Cause` will recursively retrieve the topmost error which does not implement `causer`, which is assumed to be the original cause. For example:
+```go
+switch err := errors.Cause(err).(type) {
+case *MyError:
+        // handle specifically
+default:
+        // unknown error
+}
+```
+
+[Read the package documentation for more information](https://godoc.org/github.com/pkg/errors).
+
+## Contributing
+
+We welcome pull requests, bug fixes and issue reports. With that said, the bar for adding new symbols to this package is intentionally set high.
+
+Before proposing a change, please discuss your change by raising an issue.
+
+## Licence
+
+BSD-2-Clause

vendor/github.com/pkg/errors/appveyor.yml

@@ -0,0 +1,32 @@
+version: build-{build}.{branch}
+
+clone_folder: C:\gopath\src\github.com\pkg\errors
+shallow_clone: true # for startup speed
+
+environment:
+  GOPATH: C:\gopath
+
+platform:
+  - x64
+
+# http://www.appveyor.com/docs/installed-software
+install:
+  # some helpful output for debugging builds
+  - go version
+  - go env
+  # pre-installed MinGW at C:\MinGW is 32bit only
+  # but MSYS2 at C:\msys64 has mingw64
+  - set PATH=C:\msys64\mingw64\bin;%PATH%
+  - gcc --version
+  - g++ --version
+
+build_script:
+  - go install -v ./...
+
+test_script:
+  - set PATH=C:\gopath\bin;%PATH%
+  - go test -v ./...
+
+#artifacts:
+#  - path: '%GOPATH%\bin\*.exe'
+deploy: off

vendor/github.com/pkg/errors/bench_test.go

@@ -0,0 +1,59 @@
+// +build go1.7
+
+package errors
+
+import (
+	"fmt"
+	"testing"
+
+	stderrors "errors"
+)
+
+func noErrors(at, depth int) error {
+	if at >= depth {
+		return stderrors.New("no error")
+	}
+	return noErrors(at+1, depth)
+}
+func yesErrors(at, depth int) error {
+	if at >= depth {
+		return New("ye error")
+	}
+	return yesErrors(at+1, depth)
+}
+
+func BenchmarkErrors(b *testing.B) {
+	var toperr error
+	type run struct {
+		stack int
+		std   bool
+	}
+	runs := []run{
+		{10, false},
+		{10, true},
+		{100, false},
+		{100, true},
+		{1000, false},
+		{1000, true},
+	}
+	for _, r := range runs {
+		part := "pkg/errors"
+		if r.std {
+			part = "errors"
+		}
+		name := fmt.Sprintf("%s-stack-%d", part, r.stack)
+		b.Run(name, func(b *testing.B) {
+			var err error
+			f := yesErrors
+			if r.std {
+				f = noErrors
+			}
+			b.ReportAllocs()
+			for i := 0; i < b.N; i++ {
+				err = f(0, r.stack)
+			}
+			b.StopTimer()
+			toperr = err
+		})
+	}
+}