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virtualx-engine/SConstruct
Rémi Verschelde c34b351b24 SCons: Explicitly define our C (C11) and C++ (C++14) standards 
On GCC and Clang, we use C11 and C++14 with GNU extensions (`std=gnu11`
and `std=gnu++14`). Those are the defaults for current GCC and Clang,
and also match the feature sets we want to use in Godot.

On MSVC, we require C++14 support explicitly with `/std:c++14`, and
make it strict with the use of `/permissive-` (so features of C++17 or
later can't be used).

Moves the definition before querying environment flags and platform
config so that it can be overridden when necessary.

(cherry picked from commit 342f127362)
2020-03-04 14:12:19 +01:00

683 lines
28 KiB
Python
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#!/usr/bin/env python
EnsureSConsVersion(0, 98, 1)
# System
import glob
import os
import pickle
import sys
# Local
import methods
import gles_builders
from platform_methods import run_in_subprocess
# scan possible build platforms
platform_list = [] # list of platforms
platform_opts = {} # options for each platform
platform_flags = {} # flags for each platform
active_platforms = []
active_platform_ids = []
platform_exporters = []
platform_apis = []
for x in sorted(glob.glob("platform/*")):
if (not os.path.isdir(x) or not os.path.exists(x + "/detect.py")):
continue
tmppath = "./" + x
sys.path.insert(0, tmppath)
import detect
if (os.path.exists(x + "/export/export.cpp")):
platform_exporters.append(x[9:])
if (os.path.exists(x + "/api/api.cpp")):
platform_apis.append(x[9:])
if (detect.is_active()):
active_platforms.append(detect.get_name())
active_platform_ids.append(x)
if (detect.can_build()):
x = x.replace("platform/", "") # rest of world
x = x.replace("platform\\", "") # win32
platform_list += [x]
platform_opts[x] = detect.get_opts()
platform_flags[x] = detect.get_flags()
sys.path.remove(tmppath)
sys.modules.pop('detect')
module_list = methods.detect_modules()
methods.save_active_platforms(active_platforms, active_platform_ids)
custom_tools = ['default']
platform_arg = ARGUMENTS.get("platform", ARGUMENTS.get("p", False))
if os.name == "nt" and (platform_arg == "android" or ARGUMENTS.get("use_mingw", False)):
custom_tools = ['mingw']
elif platform_arg == 'javascript':
# Use generic POSIX build toolchain for Emscripten.
custom_tools = ['cc', 'c++', 'ar', 'link', 'textfile', 'zip']
env_base = Environment(tools=custom_tools)
if 'TERM' in os.environ:
env_base['ENV']['TERM'] = os.environ['TERM']
env_base.AppendENVPath('PATH', os.getenv('PATH'))
env_base.AppendENVPath('PKG_CONFIG_PATH', os.getenv('PKG_CONFIG_PATH'))
env_base.disabled_modules = []
env_base.use_ptrcall = False
env_base.module_version_string = ""
env_base.msvc = False
env_base.__class__.disable_module = methods.disable_module
env_base.__class__.add_module_version_string = methods.add_module_version_string
env_base.__class__.add_source_files = methods.add_source_files
env_base.__class__.use_windows_spawn_fix = methods.use_windows_spawn_fix
env_base.__class__.split_lib = methods.split_lib
env_base.__class__.add_shared_library = methods.add_shared_library
env_base.__class__.add_library = methods.add_library
env_base.__class__.add_program = methods.add_program
env_base.__class__.CommandNoCache = methods.CommandNoCache
env_base.__class__.disable_warnings = methods.disable_warnings
env_base["x86_libtheora_opt_gcc"] = False
env_base["x86_libtheora_opt_vc"] = False
# avoid issues when building with different versions of python out of the same directory
env_base.SConsignFile(".sconsign{0}.dblite".format(pickle.HIGHEST_PROTOCOL))
# Build options
customs = ['custom.py']
profile = ARGUMENTS.get("profile", False)
if profile:
if os.path.isfile(profile):
customs.append(profile)
elif os.path.isfile(profile + ".py"):
customs.append(profile + ".py")
opts = Variables(customs, ARGUMENTS)
# Target build options
opts.Add('arch', "Platform-dependent architecture (arm/arm64/x86/x64/mips/...)", '')
opts.Add(EnumVariable('bits', "Target platform bits", 'default', ('default', '32', '64')))
opts.Add('p', "Platform (alias for 'platform')", '')
opts.Add('platform', "Target platform (%s)" % ('|'.join(platform_list), ), '')
opts.Add(EnumVariable('target', "Compilation target", 'debug', ('debug', 'release_debug', 'release')))
opts.Add(EnumVariable('optimize', "Optimization type", 'speed', ('speed', 'size')))
opts.Add(BoolVariable('tools', "Build the tools (a.k.a. the Godot editor)", True))
opts.Add(BoolVariable('use_lto', 'Use link-time optimization', False))
opts.Add(BoolVariable('use_precise_math_checks', 'Math checks use very precise epsilon (useful to debug the engine)', False))
# Components
opts.Add(BoolVariable('deprecated', "Enable deprecated features", True))
opts.Add(BoolVariable('gdscript', "Enable GDScript support", True))
opts.Add(BoolVariable('minizip', "Enable ZIP archive support using minizip", True))
opts.Add(BoolVariable('xaudio2', "Enable the XAudio2 audio driver", False))
# Advanced options
opts.Add(BoolVariable('verbose', "Enable verbose output for the compilation", False))
opts.Add(BoolVariable('progress', "Show a progress indicator during compilation", True))
opts.Add(EnumVariable('warnings', "Set the level of warnings emitted during compilation", 'all', ('extra', 'all', 'moderate', 'no')))
opts.Add(BoolVariable('werror', "Treat compiler warnings as errors. Depends on the level of warnings set with 'warnings'", False))
opts.Add(BoolVariable('dev', "If yes, alias for verbose=yes warnings=extra werror=yes", False))
opts.Add('extra_suffix', "Custom extra suffix added to the base filename of all generated binary files", '')
opts.Add(BoolVariable('vsproj', "Generate a Visual Studio solution", False))
opts.Add(EnumVariable('macports_clang', "Build using Clang from MacPorts", 'no', ('no', '5.0', 'devel')))
opts.Add(BoolVariable('split_libmodules', "Split intermediate libmodules.a in smaller chunks to prevent exceeding linker command line size (forced to True when using MinGW)", False))
opts.Add(BoolVariable('disable_3d', "Disable 3D nodes for a smaller executable", False))
opts.Add(BoolVariable('disable_advanced_gui', "Disable advanced GUI nodes and behaviors", False))
opts.Add(BoolVariable('no_editor_splash', "Don't use the custom splash screen for the editor", False))
opts.Add('system_certs_path', "Use this path as SSL certificates default for editor (for package maintainers)", '')
# Thirdparty libraries
opts.Add(BoolVariable('builtin_bullet', "Use the built-in Bullet library", True))
opts.Add(BoolVariable('builtin_certs', "Bundle default SSL certificates to be used if you don't specify an override in the project settings", True))
opts.Add(BoolVariable('builtin_enet', "Use the built-in ENet library", True))
opts.Add(BoolVariable('builtin_freetype', "Use the built-in FreeType library", True))
opts.Add(BoolVariable('builtin_libogg', "Use the built-in libogg library", True))
opts.Add(BoolVariable('builtin_libpng', "Use the built-in libpng library", True))
opts.Add(BoolVariable('builtin_libtheora', "Use the built-in libtheora library", True))
opts.Add(BoolVariable('builtin_libvorbis', "Use the built-in libvorbis library", True))
opts.Add(BoolVariable('builtin_libvpx', "Use the built-in libvpx library", True))
opts.Add(BoolVariable('builtin_libwebp', "Use the built-in libwebp library", True))
opts.Add(BoolVariable('builtin_wslay', "Use the built-in wslay library", True))
opts.Add(BoolVariable('builtin_mbedtls', "Use the built-in mbedTLS library", True))
opts.Add(BoolVariable('builtin_miniupnpc', "Use the built-in miniupnpc library", True))
opts.Add(BoolVariable('builtin_opus', "Use the built-in Opus library", True))
opts.Add(BoolVariable('builtin_pcre2', "Use the built-in PCRE2 library", True))
opts.Add(BoolVariable('builtin_pcre2_with_jit', "Use JIT compiler for the built-in PCRE2 library", True))
opts.Add(BoolVariable('builtin_recast', "Use the built-in Recast library", True))
opts.Add(BoolVariable('builtin_squish', "Use the built-in squish library", True))
opts.Add(BoolVariable('builtin_xatlas', "Use the built-in xatlas library", True))
opts.Add(BoolVariable('builtin_zlib', "Use the built-in zlib library", True))
opts.Add(BoolVariable('builtin_zstd', "Use the built-in Zstd library", True))
# Compilation environment setup
opts.Add("CXX", "C++ compiler")
opts.Add("CC", "C compiler")
opts.Add("LINK", "Linker")
opts.Add("CCFLAGS", "Custom flags for both the C and C++ compilers")
opts.Add("CFLAGS", "Custom flags for the C compiler")
opts.Add("CXXFLAGS", "Custom flags for the C++ compiler")
opts.Add("LINKFLAGS", "Custom flags for the linker")
# add platform specific options
for k in platform_opts.keys():
opt_list = platform_opts[k]
for o in opt_list:
opts.Add(o)
for x in module_list:
module_enabled = True
tmppath = "./modules/" + x
sys.path.insert(0, tmppath)
import config
enabled_attr = getattr(config, "is_enabled", None)
if (callable(enabled_attr) and not config.is_enabled()):
module_enabled = False
sys.path.remove(tmppath)
sys.modules.pop('config')
opts.Add(BoolVariable('module_' + x + '_enabled', "Enable module '%s'" % (x, ), module_enabled))
opts.Update(env_base) # update environment
Help(opts.GenerateHelpText(env_base)) # generate help
# add default include paths
env_base.Prepend(CPPPATH=['#'])
# configure ENV for platform
env_base.platform_exporters = platform_exporters
env_base.platform_apis = platform_apis
if (env_base["use_precise_math_checks"]):
env_base.Append(CPPDEFINES=['PRECISE_MATH_CHECKS'])
if (env_base['target'] == 'debug'):
env_base.Append(CPPDEFINES=['DEBUG_MEMORY_ALLOC','DISABLE_FORCED_INLINE'])
# The two options below speed up incremental builds, but reduce the certainty that all files
# will properly be rebuilt. As such, we only enable them for debug (dev) builds, not release.
# To decide whether to rebuild a file, use the MD5 sum only if the timestamp has changed.
# http://scons.org/doc/production/HTML/scons-user/ch06.html#idm139837621851792
env_base.Decider('MD5-timestamp')
# Use cached implicit dependencies by default. Can be overridden by specifying `--implicit-deps-changed` in the command line.
# http://scons.org/doc/production/HTML/scons-user/ch06s04.html
env_base.SetOption('implicit_cache', 1)
if (env_base['no_editor_splash']):
env_base.Append(CPPDEFINES=['NO_EDITOR_SPLASH'])
if not env_base['deprecated']:
env_base.Append(CPPDEFINES=['DISABLE_DEPRECATED'])
env_base.platforms = {}
selected_platform = ""
if env_base['platform'] != "":
selected_platform = env_base['platform']
elif env_base['p'] != "":
selected_platform = env_base['p']
env_base["platform"] = selected_platform
else:
# Missing `platform` argument, try to detect platform automatically
if sys.platform.startswith('linux'):
selected_platform = 'x11'
elif sys.platform == 'darwin':
selected_platform = 'osx'
elif sys.platform == 'win32':
selected_platform = 'windows'
else:
print("Could not detect platform automatically. Supported platforms:")
for x in platform_list:
print("\t" + x)
print("\nPlease run SCons again and select a valid platform: platform=<string>")
if selected_platform != "":
print("Automatically detected platform: " + selected_platform)
env_base["platform"] = selected_platform
if selected_platform in platform_list:
tmppath = "./platform/" + selected_platform
sys.path.insert(0, tmppath)
import detect
if "create" in dir(detect):
env = detect.create(env_base)
else:
env = env_base.Clone()
if env['dev']:
env['verbose'] = True
env['warnings'] = "extra"
env['werror'] = True
if env['vsproj']:
env.vs_incs = []
env.vs_srcs = []
def AddToVSProject(sources):
for x in sources:
if type(x) == type(""):
fname = env.File(x).path
else:
fname = env.File(x)[0].path
pieces = fname.split(".")
if len(pieces) > 0:
basename = pieces[0]
basename = basename.replace('\\\\', '/')
if os.path.isfile(basename + ".h"):
env.vs_incs = env.vs_incs + [basename + ".h"]
elif os.path.isfile(basename + ".hpp"):
env.vs_incs = env.vs_incs + [basename + ".hpp"]
if os.path.isfile(basename + ".c"):
env.vs_srcs = env.vs_srcs + [basename + ".c"]
elif os.path.isfile(basename + ".cpp"):
env.vs_srcs = env.vs_srcs + [basename + ".cpp"]
env.AddToVSProject = AddToVSProject
env.extra_suffix = ""
if env["extra_suffix"] != '':
env.extra_suffix += '.' + env["extra_suffix"]
# Environment flags
CCFLAGS = env.get('CCFLAGS', '')
env['CCFLAGS'] = ''
env.Append(CCFLAGS=str(CCFLAGS).split())
CFLAGS = env.get('CFLAGS', '')
env['CFLAGS'] = ''
env.Append(CFLAGS=str(CFLAGS).split())
CXXFLAGS = env.get('CXXFLAGS', '')
env['CXXFLAGS'] = ''
env.Append(CXXFLAGS=str(CXXFLAGS).split())
LINKFLAGS = env.get('LINKFLAGS', '')
env['LINKFLAGS'] = ''
env.Append(LINKFLAGS=str(LINKFLAGS).split())
# Platform specific flags
flag_list = platform_flags[selected_platform]
for f in flag_list:
if not (f[0] in ARGUMENTS): # allow command line to override platform flags
env[f[0]] = f[1]
# Must happen after the flags definition, so that they can be used by platform detect
detect.configure(env)
# Set our C and C++ standard requirements.
# Prepending to make it possible to override
# This needs to come after `configure`, otherwise we don't have env.msvc.
if not env.msvc:
# Specifying GNU extensions support explicitly, which are supported by
# both GCC and Clang. This mirrors GCC and Clang's current default
# compile flags if no -std is specified.
env.Prepend(CFLAGS=['-std=gnu11'])
env.Prepend(CXXFLAGS=['-std=gnu++14'])
else:
# MSVC doesn't have clear C standard support, /std only covers C++.
# We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
env.Prepend(CCFLAGS=['/std:c++14'])
# Configure compiler warnings
if env.msvc:
# Truncations, narrowing conversions, signed/unsigned comparisons...
disable_nonessential_warnings = ['/wd4267', '/wd4244', '/wd4305', '/wd4018', '/wd4800']
if (env["warnings"] == 'extra'):
env.Append(CCFLAGS=['/Wall']) # Implies /W4
elif (env["warnings"] == 'all'):
env.Append(CCFLAGS=['/W3'] + disable_nonessential_warnings)
elif (env["warnings"] == 'moderate'):
env.Append(CCFLAGS=['/W2'] + disable_nonessential_warnings)
else: # 'no'
env.Append(CCFLAGS=['/w'])
# Set exception handling model to avoid warnings caused by Windows system headers.
env.Append(CCFLAGS=['/EHsc'])
if (env["werror"]):
env.Append(CCFLAGS=['/WX'])
# Force to use Unicode encoding
env.Append(MSVC_FLAGS=['/utf8'])
else: # Rest of the world
shadow_local_warning = []
all_plus_warnings = ['-Wwrite-strings']
if methods.using_gcc(env):
version = methods.get_compiler_version(env)
if version != None and version[0] >= '7':
shadow_local_warning = ['-Wshadow-local']
if (env["warnings"] == 'extra'):
# Note: enable -Wimplicit-fallthrough for Clang (already part of -Wextra for GCC)
# once we switch to C++11 or later (necessary for our FALLTHROUGH macro).
env.Append(CCFLAGS=['-Wall', '-Wextra', '-Wno-unused-parameter']
+ all_plus_warnings + shadow_local_warning)
env.Append(CXXFLAGS=['-Wctor-dtor-privacy', '-Wnon-virtual-dtor'])
if methods.using_gcc(env):
env.Append(CCFLAGS=['-Walloc-zero',
'-Wduplicated-branches', '-Wduplicated-cond',
'-Wstringop-overflow=4', '-Wlogical-op'])
env.Append(CXXFLAGS=['-Wnoexcept', '-Wplacement-new=1'])
version = methods.get_compiler_version(env)
if version != None and version[0] >= '9':
env.Append(CCFLAGS=['-Wattribute-alias=2'])
elif (env["warnings"] == 'all'):
env.Append(CCFLAGS=['-Wall'] + shadow_local_warning)
elif (env["warnings"] == 'moderate'):
env.Append(CCFLAGS=['-Wall', '-Wno-unused'] + shadow_local_warning)
else: # 'no'
env.Append(CCFLAGS=['-w'])
if (env["werror"]):
env.Append(CCFLAGS=['-Werror'])
else: # always enable those errors
env.Append(CCFLAGS=['-Werror=return-type'])
if (hasattr(detect, 'get_program_suffix')):
suffix = "." + detect.get_program_suffix()
else:
suffix = "." + selected_platform
if (env["target"] == "release"):
if env["tools"]:
print("Tools can only be built with targets 'debug' and 'release_debug'.")
sys.exit(255)
suffix += ".opt"
env.Append(CPPDEFINES=['NDEBUG'])
elif (env["target"] == "release_debug"):
if env["tools"]:
suffix += ".opt.tools"
else:
suffix += ".opt.debug"
else:
if env["tools"]:
suffix += ".tools"
else:
suffix += ".debug"
if env["arch"] != "":
suffix += "." + env["arch"]
elif (env["bits"] == "32"):
suffix += ".32"
elif (env["bits"] == "64"):
suffix += ".64"
suffix += env.extra_suffix
sys.path.remove(tmppath)
sys.modules.pop('detect')
env.module_list = []
env.module_icons_paths = []
env.doc_class_path = {}
for x in module_list:
if not env['module_' + x + '_enabled']:
continue
tmppath = "./modules/" + x
sys.path.insert(0, tmppath)
env.current_module = x
import config
# can_build changed number of arguments between 3.0 (1) and 3.1 (2),
# so try both to preserve compatibility for 3.0 modules
can_build = False
try:
can_build = config.can_build(env, selected_platform)
except TypeError:
print("Warning: module '%s' uses a deprecated `can_build` "
"signature in its config.py file, it should be "
"`can_build(env, platform)`." % x)
can_build = config.can_build(selected_platform)
if (can_build):
config.configure(env)
env.module_list.append(x)
# Get doc classes paths (if present)
try:
doc_classes = config.get_doc_classes()
doc_path = config.get_doc_path()
for c in doc_classes:
env.doc_class_path[c] = "modules/" + x + "/" + doc_path
except:
pass
# Get icon paths (if present)
try:
icons_path = config.get_icons_path()
env.module_icons_paths.append("modules/" + x + "/" + icons_path)
except:
# Default path for module icons
env.module_icons_paths.append("modules/" + x + "/" + "icons")
sys.path.remove(tmppath)
sys.modules.pop('config')
methods.update_version(env.module_version_string)
env["PROGSUFFIX"] = suffix + env.module_version_string + env["PROGSUFFIX"]
env["OBJSUFFIX"] = suffix + env["OBJSUFFIX"]
# (SH)LIBSUFFIX will be used for our own built libraries
# LIBSUFFIXES contains LIBSUFFIX and SHLIBSUFFIX by default,
# so we need to append the default suffixes to keep the ability
# to link against thirdparty libraries (.a, .so, .lib, etc.).
if os.name == "nt":
# On Windows, only static libraries and import libraries can be
# statically linked - both using .lib extension
env["LIBSUFFIXES"] += [env["LIBSUFFIX"]]
else:
env["LIBSUFFIXES"] += [env["LIBSUFFIX"], env["SHLIBSUFFIX"]]
env["LIBSUFFIX"] = suffix + env["LIBSUFFIX"]
env["SHLIBSUFFIX"] = suffix + env["SHLIBSUFFIX"]
if (env.use_ptrcall):
env.Append(CPPDEFINES=['PTRCALL_ENABLED'])
if env['tools']:
env.Append(CPPDEFINES=['TOOLS_ENABLED'])
if env['disable_3d']:
if env['tools']:
print("Build option 'disable_3d=yes' cannot be used with 'tools=yes' (editor), only with 'tools=no' (export template).")
sys.exit(255)
else:
env.Append(CPPDEFINES=['_3D_DISABLED'])
if env['gdscript']:
env.Append(CPPDEFINES=['GDSCRIPT_ENABLED'])
if env['disable_advanced_gui']:
if env['tools']:
print("Build option 'disable_advanced_gui=yes' cannot be used with 'tools=yes' (editor), only with 'tools=no' (export template).")
sys.exit(255)
else:
env.Append(CPPDEFINES=['ADVANCED_GUI_DISABLED'])
if env['minizip']:
env.Append(CPPDEFINES=['MINIZIP_ENABLED'])
editor_module_list = ['regex']
for x in editor_module_list:
if not env['module_' + x + '_enabled']:
if env['tools']:
print("Build option 'module_" + x + "_enabled=no' cannot be used with 'tools=yes' (editor), only with 'tools=no' (export template).")
sys.exit(255)
if not env['verbose']:
methods.no_verbose(sys, env)
if (not env["platform"] == "server"): # FIXME: detect GLES3
env.Append(BUILDERS = { 'GLES3_GLSL' : env.Builder(action=run_in_subprocess(gles_builders.build_gles3_headers), suffix='glsl.gen.h', src_suffix='.glsl')})
env.Append(BUILDERS = { 'GLES2_GLSL' : env.Builder(action=run_in_subprocess(gles_builders.build_gles2_headers), suffix='glsl.gen.h', src_suffix='.glsl')})
scons_cache_path = os.environ.get("SCONS_CACHE")
if scons_cache_path != None:
CacheDir(scons_cache_path)
print("Scons cache enabled... (path: '" + scons_cache_path + "')")
Export('env')
# build subdirs, the build order is dependent on link order.
SConscript("core/SCsub")
SConscript("servers/SCsub")
SConscript("scene/SCsub")
SConscript("editor/SCsub")
SConscript("drivers/SCsub")
SConscript("platform/SCsub")
SConscript("modules/SCsub")
SConscript("main/SCsub")
SConscript("platform/" + selected_platform + "/SCsub") # build selected platform
# Microsoft Visual Studio Project Generation
if env['vsproj']:
env['CPPPATH'] = [Dir(path) for path in env['CPPPATH']]
methods.generate_vs_project(env, GetOption("num_jobs"))
methods.generate_cpp_hint_file("cpp.hint")
# Check for the existence of headers
conf = Configure(env)
if ("check_c_headers" in env):
for header in env["check_c_headers"]:
if (conf.CheckCHeader(header[0])):
env.AppendUnique(CPPDEFINES=[header[1]])
elif selected_platform != "":
if selected_platform == "list":
print("The following platforms are available:\n")
else:
print('Invalid target platform "' + selected_platform + '".')
print("The following platforms were detected:\n")
for x in platform_list:
print("\t" + x)
print("\nPlease run SCons again and select a valid platform: platform=<string>")
if selected_platform == "list":
# Exit early to suppress the rest of the built-in SCons messages
sys.exit(0)
else:
sys.exit(255)
# The following only makes sense when the env is defined, and assumes it is
if 'env' in locals():
screen = sys.stdout
# Progress reporting is not available in non-TTY environments since it
# messes with the output (for example, when writing to a file)
show_progress = (env['progress'] and sys.stdout.isatty())
node_count = 0
node_count_max = 0
node_count_interval = 1
node_count_fname = str(env.Dir('#')) + '/.scons_node_count'
import time, math
class cache_progress:
# The default is 1 GB cache and 12 hours half life
def __init__(self, path = None, limit = 1073741824, half_life = 43200):
self.path = path
self.limit = limit
self.exponent_scale = math.log(2) / half_life
if env['verbose'] and path != None:
screen.write('Current cache limit is ' + self.convert_size(limit) + ' (used: ' + self.convert_size(self.get_size(path)) + ')\n')
self.delete(self.file_list())
def __call__(self, node, *args, **kw):
global node_count, node_count_max, node_count_interval, node_count_fname, show_progress
if show_progress:
# Print the progress percentage
node_count += node_count_interval
if (node_count_max > 0 and node_count <= node_count_max):
screen.write('\r[%3d%%] ' % (node_count * 100 / node_count_max))
screen.flush()
elif (node_count_max > 0 and node_count > node_count_max):
screen.write('\r[100%] ')
screen.flush()
else:
screen.write('\r[Initial build] ')
screen.flush()
def delete(self, files):
if len(files) == 0:
return
if env['verbose']:
# Utter something
screen.write('\rPurging %d %s from cache...\n' % (len(files), len(files) > 1 and 'files' or 'file'))
[os.remove(f) for f in files]
def file_list(self):
if self.path is None:
# Nothing to do
return []
# Gather a list of (filename, (size, atime)) within the
# cache directory
file_stat = [(x, os.stat(x)[6:8]) for x in glob.glob(os.path.join(self.path, '*', '*'))]
if file_stat == []:
# Nothing to do
return []
# Weight the cache files by size (assumed to be roughly
# proportional to the recompilation time) times an exponential
# decay since the ctime, and return a list with the entries
# (filename, size, weight).
current_time = time.time()
file_stat = [(x[0], x[1][0], (current_time - x[1][1])) for x in file_stat]
# Sort by the most recently accessed files (most sensible to keep) first
file_stat.sort(key=lambda x: x[2])
# Search for the first entry where the storage limit is
# reached
sum, mark = 0, None
for i,x in enumerate(file_stat):
sum += x[1]
if sum > self.limit:
mark = i
break
if mark is None:
return []
else:
return [x[0] for x in file_stat[mark:]]
def convert_size(self, size_bytes):
if size_bytes == 0:
return "0 bytes"
size_name = ("bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
i = int(math.floor(math.log(size_bytes, 1024)))
p = math.pow(1024, i)
s = round(size_bytes / p, 2)
return "%s %s" % (int(s) if i == 0 else s, size_name[i])
def get_size(self, start_path = '.'):
total_size = 0
for dirpath, dirnames, filenames in os.walk(start_path):
for f in filenames:
fp = os.path.join(dirpath, f)
total_size += os.path.getsize(fp)
return total_size
def progress_finish(target, source, env):
global node_count, progressor
with open(node_count_fname, 'w') as f:
f.write('%d\n' % node_count)
progressor.delete(progressor.file_list())
try:
with open(node_count_fname) as f:
node_count_max = int(f.readline())
except:
pass
cache_directory = os.environ.get("SCONS_CACHE")
# Simple cache pruning, attached to SCons' progress callback. Trim the
# cache directory to a size not larger than cache_limit.
cache_limit = float(os.getenv("SCONS_CACHE_LIMIT", 1024)) * 1024 * 1024
progressor = cache_progress(cache_directory, cache_limit)
Progress(progressor, interval = node_count_interval)
progress_finish_command = Command('progress_finish', [], progress_finish)
AlwaysBuild(progress_finish_command)
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