Externalize S3 config from main

README.md

@@ -1,10 +1,16 @@
 # S3 Manager
 
-Manage S3 buckets from any provider.
+A Web UI to written in Go to manage S3 buckets from any provider.
 
 ## Environment Variables
 
-* `S3_ACCESS_KEY_ID`
+* `S3_ACCESS_KEY_ID`: Required. Your S3 access key ID
-* `S3_SECRET_ACCESS_KEY`
+* `S3_SECRET_ACCESS_KEY`: Required. Your S3 secret access key
 * `S3_ENDPOINT`: Optional. In case you are using a different S3 provider than AWS. Defaults to `s3.amazonaws.com`
 * `V2_SIGNING`: Optional. In case your S3 provider still uses V2 Signing, set this to `true`
+
+## Run locally
+
+1. Set all environment variables
+1. Run `go build .`
+1. Run the binary and visit <http://localhost:8080>

main.go

@@ -4,42 +4,13 @@ import (
 	"log"
 	"net/http"
 	"os"
-
-	"github.com/minio/minio-go"
 )
 
-var minioClient *minio.Client
-
 func main() {
-	var err error
-
 	port := os.Getenv("PORT")
 	if len(port) == 0 {
 		port = "8080"
 	}
-	s3AccessKeyID := os.Getenv("S3_ACCESS_KEY_ID")
-	if len(s3AccessKeyID) == 0 {
-		log.Fatalln("Please set S3_ACCESS_KEY_ID")
-	}
-
-	s3SecretAccessKey := os.Getenv("S3_SECRET_ACCESS_KEY")
-	if len(s3SecretAccessKey) == 0 {
-		log.Fatalln("Please set S3_SECRET_ACCESS_KEY")
-	}
-
-	s3Endpoint := os.Getenv("S3_ENDPOINT")
-	if len(s3Endpoint) == 0 {
-		s3Endpoint = "s3.amazonaws.com"
-	}
-
-	if os.Getenv("V2_SIGNING") == "true" {
-		minioClient, err = minio.NewV2(s3Endpoint, s3AccessKeyID, s3SecretAccessKey, true)
-	} else {
-		minioClient, err = minio.New(s3Endpoint, s3AccessKeyID, s3SecretAccessKey, true)
-	}
-	if err != nil {
-		panic(err)
-	}
 
 	router := NewRouter()
 

manifest.yml

@@ -5,7 +5,6 @@ applications:
   buildpack: https://github.com/cloudfoundry/go-buildpack.git
 
   env:
-    GOVERSION: go1.7
     S3_ACCESS_KEY_ID: "XXX"
     S3_SECRET_ACCESS_KEY: "xxx"
     S3_ENDPOINT: "ds31s3.swisscom.com"

minio.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	minio "github.com/minio/minio-go"
+)
+
+var minioClient *minio.Client
+
+func init() {
+	var err error
+
+	s3Endpoint := os.Getenv("S3_ENDPOINT")
+	if len(s3Endpoint) == 0 {
+		s3Endpoint = "s3.amazonaws.com"
+	}
+
+	s3AccessKeyID := os.Getenv("S3_ACCESS_KEY_ID")
+	if len(s3AccessKeyID) == 0 {
+		log.Fatalln("Please set S3_ACCESS_KEY_ID")
+	}
+
+	s3SecretAccessKey := os.Getenv("S3_SECRET_ACCESS_KEY")
+	if len(s3SecretAccessKey) == 0 {
+		log.Fatalln("Please set S3_SECRET_ACCESS_KEY")
+	}
+
+	if os.Getenv("V2_SIGNING") == "true" {
+		minioClient, err = minio.NewV2(s3Endpoint, s3AccessKeyID, s3SecretAccessKey, true)
+	} else {
+		minioClient, err = minio.New(s3Endpoint, s3AccessKeyID, s3SecretAccessKey, true)
+	}
+	if err != nil {
+		log.Fatalln(err)
+	}
+}