__init__.py.svn-base
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- """SCons.Script
- This file implements the main() function used by the scons script.
- Architecturally, this *is* the scons script, and will likely only be
- called from the external "scons" wrapper. Consequently, anything here
- should not be, or be considered, part of the build engine. If it's
- something that we expect other software to want to use, it should go in
- some other module. If it's specific to the "scons" script invocation,
- it goes here.
- """
- #
- # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
- #
- # 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.
- #
- __revision__ = "src/engine/SCons/Script/__init__.py 3057 2008/06/09 22:21:00 knight"
- import time
- start_time = time.time()
- import os
- import string
- import sys
- import UserList
- # Special chicken-and-egg handling of the "--debug=memoizer" flag:
- #
- # SCons.Memoize contains a metaclass implementation that affects how
- # the other classes are instantiated. The Memoizer may add shim methods
- # to classes that have methods that cache computed values in order to
- # count and report the hits and misses.
- #
- # If we wait to enable the Memoization until after we've parsed the
- # command line options normally, it will be too late, because the Memoizer
- # will have already analyzed the classes that it's Memoizing and decided
- # to not add the shims. So we use a special-case, up-front check for
- # the "--debug=memoizer" flag and enable Memoizer before we import any
- # of the other modules that use it.
- _args = sys.argv + string.split(os.environ.get('SCONSFLAGS', ''))
- if "--debug=memoizer" in _args:
- import SCons.Memoize
- import SCons.Warnings
- try:
- SCons.Memoize.EnableMemoization()
- except SCons.Warnings.Warning:
- # Some warning was thrown (inability to --debug=memoizer on
- # Python 1.5.2 because it doesn't have metaclasses). Arrange
- # for it to be displayed or not after warnings are configured.
- import Main
- exc_type, exc_value, tb = sys.exc_info()
- Main.delayed_warnings.append((exc_type, exc_value))
- del _args
- import SCons.Action
- import SCons.Builder
- import SCons.Environment
- import SCons.Node.FS
- import SCons.Options
- import SCons.Platform
- import SCons.Scanner
- import SCons.SConf
- import SCons.Subst
- import SCons.Tool
- import SCons.Util
- import SCons.Variables
- import SCons.Defaults
- import Main
- main = Main.main
- # The following are global class definitions and variables that used to
- # live directly in this module back before 0.96.90, when it contained
- # a lot of code. Some SConscript files in widely-distributed packages
- # (Blender is the specific example) actually reached into SCons.Script
- # directly to use some of these. Rather than break those SConscript
- # files, we're going to propagate these names into the SCons.Script
- # namespace here.
- #
- # Some of these are commented out because it's *really* unlikely anyone
- # used them, but we're going to leave the comment here to try to make
- # it obvious what to do if the situation arises.
- BuildTask = Main.BuildTask
- CleanTask = Main.CleanTask
- QuestionTask = Main.QuestionTask
- #PrintHelp = Main.PrintHelp
- #SConscriptSettableOptions = Main.SConscriptSettableOptions
- AddOption = Main.AddOption
- GetOption = Main.GetOption
- SetOption = Main.SetOption
- Progress = Main.Progress
- GetBuildFailures = Main.GetBuildFailures
- #keep_going_on_error = Main.keep_going_on_error
- #print_dtree = Main.print_dtree
- #print_explanations = Main.print_explanations
- #print_includes = Main.print_includes
- #print_objects = Main.print_objects
- #print_time = Main.print_time
- #print_tree = Main.print_tree
- #memory_stats = Main.memory_stats
- #ignore_errors = Main.ignore_errors
- #sconscript_time = Main.sconscript_time
- #command_time = Main.command_time
- #exit_status = Main.exit_status
- #profiling = Main.profiling
- #repositories = Main.repositories
- #
- import SConscript
- _SConscript = SConscript
- call_stack = _SConscript.call_stack
- #
- Action = SCons.Action.Action
- AddMethod = SCons.Util.AddMethod
- AllowSubstExceptions = SCons.Subst.SetAllowableExceptions
- Builder = SCons.Builder.Builder
- Configure = _SConscript.Configure
- Environment = SCons.Environment.Environment
- #OptParser = SCons.SConsOptions.OptParser
- FindPathDirs = SCons.Scanner.FindPathDirs
- Platform = SCons.Platform.Platform
- Return = _SConscript.Return
- Scanner = SCons.Scanner.Base
- Tool = SCons.Tool.Tool
- WhereIs = SCons.Util.WhereIs
- #
- BoolVariable = SCons.Variables.BoolVariable
- EnumVariable = SCons.Variables.EnumVariable
- ListVariable = SCons.Variables.ListVariable
- PackageVariable = SCons.Variables.PackageVariable
- PathVariable = SCons.Variables.PathVariable
- # Deprecated names that will go away some day.
- BoolOption = SCons.Options.BoolOption
- EnumOption = SCons.Options.EnumOption
- ListOption = SCons.Options.ListOption
- PackageOption = SCons.Options.PackageOption
- PathOption = SCons.Options.PathOption
- # Action factories.
- Chmod = SCons.Defaults.Chmod
- Copy = SCons.Defaults.Copy
- Delete = SCons.Defaults.Delete
- Mkdir = SCons.Defaults.Mkdir
- Move = SCons.Defaults.Move
- Touch = SCons.Defaults.Touch
- # Pre-made, public scanners.
- CScanner = SCons.Tool.CScanner
- DScanner = SCons.Tool.DScanner
- DirScanner = SCons.Defaults.DirScanner
- ProgramScanner = SCons.Tool.ProgramScanner
- SourceFileScanner = SCons.Tool.SourceFileScanner
- # Functions we might still convert to Environment methods.
- CScan = SCons.Defaults.CScan
- DefaultEnvironment = SCons.Defaults.DefaultEnvironment
- # Other variables we provide.
- class TargetList(UserList.UserList):
- def _do_nothing(self, *args, **kw):
- pass
- def _add_Default(self, list):
- self.extend(list)
- def _clear(self):
- del self[:]
- ARGUMENTS = {}
- ARGLIST = []
- BUILD_TARGETS = TargetList()
- COMMAND_LINE_TARGETS = []
- DEFAULT_TARGETS = []
- # BUILD_TARGETS can be modified in the SConscript files. If so, we
- # want to treat the modified BUILD_TARGETS list as if they specified
- # targets on the command line. To do that, though, we need to know if
- # BUILD_TARGETS was modified through "official" APIs or by hand. We do
- # this by updating two lists in parallel, the documented BUILD_TARGETS
- # list, above, and this internal _build_plus_default targets list which
- # should only have "official" API changes. Then Script/Main.py can
- # compare these two afterwards to figure out if the user added their
- # own targets to BUILD_TARGETS.
- _build_plus_default = TargetList()
- def _Add_Arguments(alist):
- for arg in alist:
- a, b = string.split(arg, '=', 1)
- ARGUMENTS[a] = b
- ARGLIST.append((a, b))
- def _Add_Targets(tlist):
- if tlist:
- COMMAND_LINE_TARGETS.extend(tlist)
- BUILD_TARGETS.extend(tlist)
- BUILD_TARGETS._add_Default = BUILD_TARGETS._do_nothing
- BUILD_TARGETS._clear = BUILD_TARGETS._do_nothing
- _build_plus_default.extend(tlist)
- _build_plus_default._add_Default = _build_plus_default._do_nothing
- _build_plus_default._clear = _build_plus_default._do_nothing
- def _Set_Default_Targets_Has_Been_Called(d, fs):
- return DEFAULT_TARGETS
- def _Set_Default_Targets_Has_Not_Been_Called(d, fs):
- if d is None:
- d = [fs.Dir('.')]
- return d
- _Get_Default_Targets = _Set_Default_Targets_Has_Not_Been_Called
- def _Set_Default_Targets(env, tlist):
- global DEFAULT_TARGETS
- global _Get_Default_Targets
- _Get_Default_Targets = _Set_Default_Targets_Has_Been_Called
- for t in tlist:
- if t is None:
- # Delete the elements from the list in-place, don't
- # reassign an empty list to DEFAULT_TARGETS, so that the
- # variables will still point to the same object we point to.
- del DEFAULT_TARGETS[:]
- BUILD_TARGETS._clear()
- _build_plus_default._clear()
- elif isinstance(t, SCons.Node.Node):
- DEFAULT_TARGETS.append(t)
- BUILD_TARGETS._add_Default([t])
- _build_plus_default._add_Default([t])
- else:
- nodes = env.arg2nodes(t, env.fs.Entry)
- DEFAULT_TARGETS.extend(nodes)
- BUILD_TARGETS._add_Default(nodes)
- _build_plus_default._add_Default(nodes)
- #
- help_text = None
- def HelpFunction(text):
- global help_text
- if SCons.Script.help_text is None:
- SCons.Script.help_text = text
- else:
- help_text = help_text + text
- #
- # Will be non-zero if we are reading an SConscript file.
- sconscript_reading = 0
- #
- def Variables(files=[], args=ARGUMENTS):
- return SCons.Variables.Variables(files, args)
- def Options(files=[], args=ARGUMENTS):
- return SCons.Options.Options(files, args)
- # The list of global functions to add to the SConscript name space
- # that end up calling corresponding methods or Builders in the
- # DefaultEnvironment().
- GlobalDefaultEnvironmentFunctions = [
- # Methods from the SConsEnvironment class, above.
- 'Default',
- 'EnsurePythonVersion',
- 'EnsureSConsVersion',
- 'Exit',
- 'Export',
- 'GetLaunchDir',
- 'Help',
- 'Import',
- #'SConscript', is handled separately, below.
- 'SConscriptChdir',
- # Methods from the Environment.Base class.
- 'AddPostAction',
- 'AddPreAction',
- 'Alias',
- 'AlwaysBuild',
- 'BuildDir',
- 'CacheDir',
- 'Clean',
- #The Command() method is handled separately, below.
- 'Decider',
- 'Depends',
- 'Dir',
- 'NoClean',
- 'NoCache',
- 'Entry',
- 'Execute',
- 'File',
- 'FindFile',
- 'FindInstalledFiles',
- 'FindSourceFiles',
- 'Flatten',
- 'GetBuildPath',
- 'Glob',
- 'Ignore',
- 'Install',
- 'InstallAs',
- 'Literal',
- 'Local',
- 'ParseDepends',
- 'Precious',
- 'Repository',
- 'Requires',
- 'SConsignFile',
- 'SideEffect',
- 'SourceCode',
- 'SourceSignatures',
- 'Split',
- 'Tag',
- 'TargetSignatures',
- 'Value',
- 'VariantDir',
- ]
- GlobalDefaultBuilders = [
- # Supported builders.
- 'CFile',
- 'CXXFile',
- 'DVI',
- 'Jar',
- 'Java',
- 'JavaH',
- 'Library',
- 'M4',
- 'MSVSProject',
- 'Object',
- 'PCH',
- 'PDF',
- 'PostScript',
- 'Program',
- 'RES',
- 'RMIC',
- 'SharedLibrary',
- 'SharedObject',
- 'StaticLibrary',
- 'StaticObject',
- 'Tar',
- 'TypeLibrary',
- 'Zip',
- 'Package',
- ]
- for name in GlobalDefaultEnvironmentFunctions + GlobalDefaultBuilders:
- exec "%s = _SConscript.DefaultEnvironmentCall(%s)" % (name, repr(name))
- del name
- # There are a handful of variables that used to live in the
- # Script/SConscript.py module that some SConscript files out there were
- # accessing directly as SCons.Script.SConscript.*. The problem is that
- # "SConscript" in this namespace is no longer a module, it's a global
- # function call--or more precisely, an object that implements a global
- # function call through the default Environment. Nevertheless, we can
- # maintain backwards compatibility for SConscripts that were reaching in
- # this way by hanging some attributes off the "SConscript" object here.
- SConscript = _SConscript.DefaultEnvironmentCall('SConscript')
- # Make SConscript look enough like the module it used to be so
- # that pychecker doesn't barf.
- SConscript.__name__ = 'SConscript'
- SConscript.Arguments = ARGUMENTS
- SConscript.ArgList = ARGLIST
- SConscript.BuildTargets = BUILD_TARGETS
- SConscript.CommandLineTargets = COMMAND_LINE_TARGETS
- SConscript.DefaultTargets = DEFAULT_TARGETS
- # The global Command() function must be handled differently than the
- # global functions for other construction environment methods because
- # we want people to be able to use Actions that must expand $TARGET
- # and $SOURCE later, when (and if) the Action is invoked to build
- # the target(s). We do this with the subst=1 argument, which creates
- # a DefaultEnvironmentCall instance that wraps up a normal default
- # construction environment that performs variable substitution, not a
- # proxy that doesn't.
- #
- # There's a flaw here, though, because any other $-variables on a command
- # line will *also* be expanded, each to a null string, but that should
- # only be a problem in the unusual case where someone was passing a '$'
- # on a command line and *expected* the $ to get through to the shell
- # because they were calling Command() and not env.Command()... This is
- # unlikely enough that we're going to leave this as is and cross that
- # bridge if someone actually comes to it.
- Command = _SConscript.DefaultEnvironmentCall('Command', subst=1)