413 lines
14 KiB
Python
413 lines
14 KiB
Python
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"""SCons.Script
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This file implements the main() function used by the scons script.
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Architecturally, this *is* the scons script, and will likely only be
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called from the external "scons" wrapper. Consequently, anything here
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should not be, or be considered, part of the build engine. If it's
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something that we expect other software to want to use, it should go in
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some other module. If it's specific to the "scons" script invocation,
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it goes here.
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"""
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#
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# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/Script/__init__.py 5357 2011/09/09 21:31:03 bdeegan"
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import time
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start_time = time.time()
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import collections
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import os
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import sys
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# Special chicken-and-egg handling of the "--debug=memoizer" flag:
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#
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# SCons.Memoize contains a metaclass implementation that affects how
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# the other classes are instantiated. The Memoizer may add shim methods
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# to classes that have methods that cache computed values in order to
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# count and report the hits and misses.
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#
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# If we wait to enable the Memoization until after we've parsed the
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# command line options normally, it will be too late, because the Memoizer
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# will have already analyzed the classes that it's Memoizing and decided
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# to not add the shims. So we use a special-case, up-front check for
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# the "--debug=memoizer" flag and enable Memoizer before we import any
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# of the other modules that use it.
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_args = sys.argv + os.environ.get('SCONSFLAGS', '').split()
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if "--debug=memoizer" in _args:
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import SCons.Memoize
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import SCons.Warnings
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try:
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SCons.Memoize.EnableMemoization()
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except SCons.Warnings.Warning:
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# Some warning was thrown. Arrange for it to be displayed
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# or not after warnings are configured.
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import Main
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exc_type, exc_value, tb = sys.exc_info()
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Main.delayed_warnings.append((exc_type, exc_value))
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del _args
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import SCons.Action
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import SCons.Builder
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import SCons.Environment
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import SCons.Node.FS
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import SCons.Options
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import SCons.Platform
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import SCons.Scanner
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import SCons.SConf
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import SCons.Subst
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import SCons.Tool
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import SCons.Util
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import SCons.Variables
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import SCons.Defaults
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import Main
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main = Main.main
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# The following are global class definitions and variables that used to
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# live directly in this module back before 0.96.90, when it contained
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# a lot of code. Some SConscript files in widely-distributed packages
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# (Blender is the specific example) actually reached into SCons.Script
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# directly to use some of these. Rather than break those SConscript
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# files, we're going to propagate these names into the SCons.Script
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# namespace here.
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#
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# Some of these are commented out because it's *really* unlikely anyone
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# used them, but we're going to leave the comment here to try to make
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# it obvious what to do if the situation arises.
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BuildTask = Main.BuildTask
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CleanTask = Main.CleanTask
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QuestionTask = Main.QuestionTask
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#PrintHelp = Main.PrintHelp
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#SConscriptSettableOptions = Main.SConscriptSettableOptions
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AddOption = Main.AddOption
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GetOption = Main.GetOption
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SetOption = Main.SetOption
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Progress = Main.Progress
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GetBuildFailures = Main.GetBuildFailures
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#keep_going_on_error = Main.keep_going_on_error
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#print_dtree = Main.print_dtree
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#print_explanations = Main.print_explanations
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#print_includes = Main.print_includes
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#print_objects = Main.print_objects
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#print_time = Main.print_time
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#print_tree = Main.print_tree
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#memory_stats = Main.memory_stats
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#ignore_errors = Main.ignore_errors
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#sconscript_time = Main.sconscript_time
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#command_time = Main.command_time
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#exit_status = Main.exit_status
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#profiling = Main.profiling
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#repositories = Main.repositories
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#
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import SConscript
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_SConscript = SConscript
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call_stack = _SConscript.call_stack
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#
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Action = SCons.Action.Action
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AddMethod = SCons.Util.AddMethod
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AllowSubstExceptions = SCons.Subst.SetAllowableExceptions
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Builder = SCons.Builder.Builder
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Configure = _SConscript.Configure
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Environment = SCons.Environment.Environment
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#OptParser = SCons.SConsOptions.OptParser
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FindPathDirs = SCons.Scanner.FindPathDirs
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Platform = SCons.Platform.Platform
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Return = _SConscript.Return
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Scanner = SCons.Scanner.Base
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Tool = SCons.Tool.Tool
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WhereIs = SCons.Util.WhereIs
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#
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BoolVariable = SCons.Variables.BoolVariable
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EnumVariable = SCons.Variables.EnumVariable
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ListVariable = SCons.Variables.ListVariable
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PackageVariable = SCons.Variables.PackageVariable
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PathVariable = SCons.Variables.PathVariable
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# Deprecated names that will go away some day.
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BoolOption = SCons.Options.BoolOption
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EnumOption = SCons.Options.EnumOption
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ListOption = SCons.Options.ListOption
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PackageOption = SCons.Options.PackageOption
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PathOption = SCons.Options.PathOption
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# Action factories.
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Chmod = SCons.Defaults.Chmod
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Copy = SCons.Defaults.Copy
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Delete = SCons.Defaults.Delete
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Mkdir = SCons.Defaults.Mkdir
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Move = SCons.Defaults.Move
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Touch = SCons.Defaults.Touch
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# Pre-made, public scanners.
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CScanner = SCons.Tool.CScanner
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DScanner = SCons.Tool.DScanner
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DirScanner = SCons.Defaults.DirScanner
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ProgramScanner = SCons.Tool.ProgramScanner
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SourceFileScanner = SCons.Tool.SourceFileScanner
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# Functions we might still convert to Environment methods.
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CScan = SCons.Defaults.CScan
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DefaultEnvironment = SCons.Defaults.DefaultEnvironment
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# Other variables we provide.
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class TargetList(collections.UserList):
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def _do_nothing(self, *args, **kw):
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pass
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def _add_Default(self, list):
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self.extend(list)
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def _clear(self):
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del self[:]
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ARGUMENTS = {}
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ARGLIST = []
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BUILD_TARGETS = TargetList()
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COMMAND_LINE_TARGETS = []
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DEFAULT_TARGETS = []
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# BUILD_TARGETS can be modified in the SConscript files. If so, we
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# want to treat the modified BUILD_TARGETS list as if they specified
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# targets on the command line. To do that, though, we need to know if
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# BUILD_TARGETS was modified through "official" APIs or by hand. We do
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# this by updating two lists in parallel, the documented BUILD_TARGETS
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# list, above, and this internal _build_plus_default targets list which
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# should only have "official" API changes. Then Script/Main.py can
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# compare these two afterwards to figure out if the user added their
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# own targets to BUILD_TARGETS.
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_build_plus_default = TargetList()
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def _Add_Arguments(alist):
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for arg in alist:
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a, b = arg.split('=', 1)
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ARGUMENTS[a] = b
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ARGLIST.append((a, b))
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def _Add_Targets(tlist):
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if tlist:
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COMMAND_LINE_TARGETS.extend(tlist)
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BUILD_TARGETS.extend(tlist)
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BUILD_TARGETS._add_Default = BUILD_TARGETS._do_nothing
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BUILD_TARGETS._clear = BUILD_TARGETS._do_nothing
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_build_plus_default.extend(tlist)
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_build_plus_default._add_Default = _build_plus_default._do_nothing
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_build_plus_default._clear = _build_plus_default._do_nothing
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def _Set_Default_Targets_Has_Been_Called(d, fs):
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return DEFAULT_TARGETS
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def _Set_Default_Targets_Has_Not_Been_Called(d, fs):
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if d is None:
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d = [fs.Dir('.')]
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return d
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_Get_Default_Targets = _Set_Default_Targets_Has_Not_Been_Called
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def _Set_Default_Targets(env, tlist):
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global DEFAULT_TARGETS
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global _Get_Default_Targets
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_Get_Default_Targets = _Set_Default_Targets_Has_Been_Called
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for t in tlist:
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if t is None:
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# Delete the elements from the list in-place, don't
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# reassign an empty list to DEFAULT_TARGETS, so that the
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# variables will still point to the same object we point to.
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del DEFAULT_TARGETS[:]
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BUILD_TARGETS._clear()
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_build_plus_default._clear()
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elif isinstance(t, SCons.Node.Node):
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DEFAULT_TARGETS.append(t)
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BUILD_TARGETS._add_Default([t])
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_build_plus_default._add_Default([t])
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else:
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nodes = env.arg2nodes(t, env.fs.Entry)
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DEFAULT_TARGETS.extend(nodes)
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BUILD_TARGETS._add_Default(nodes)
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_build_plus_default._add_Default(nodes)
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#
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help_text = None
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def HelpFunction(text):
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global help_text
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if SCons.Script.help_text is None:
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SCons.Script.help_text = text
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else:
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help_text = help_text + text
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#
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# Will be non-zero if we are reading an SConscript file.
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sconscript_reading = 0
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#
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def Variables(files=[], args=ARGUMENTS):
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return SCons.Variables.Variables(files, args)
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def Options(files=[], args=ARGUMENTS):
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return SCons.Options.Options(files, args)
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# The list of global functions to add to the SConscript name space
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# that end up calling corresponding methods or Builders in the
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# DefaultEnvironment().
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GlobalDefaultEnvironmentFunctions = [
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# Methods from the SConsEnvironment class, above.
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'Default',
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'EnsurePythonVersion',
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'EnsureSConsVersion',
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'Exit',
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'Export',
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'GetLaunchDir',
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'Help',
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'Import',
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#'SConscript', is handled separately, below.
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'SConscriptChdir',
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# Methods from the Environment.Base class.
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'AddPostAction',
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'AddPreAction',
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'Alias',
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'AlwaysBuild',
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'BuildDir',
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'CacheDir',
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'Clean',
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#The Command() method is handled separately, below.
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'Decider',
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'Depends',
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'Dir',
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'NoClean',
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'NoCache',
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'Entry',
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'Execute',
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'File',
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'FindFile',
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'FindInstalledFiles',
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'FindSourceFiles',
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'Flatten',
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'GetBuildPath',
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'Glob',
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'Ignore',
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'Install',
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'InstallAs',
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'Literal',
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'Local',
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'ParseDepends',
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'Precious',
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'Repository',
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'Requires',
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'SConsignFile',
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'SideEffect',
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'SourceCode',
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'SourceSignatures',
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'Split',
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'Tag',
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'TargetSignatures',
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'Value',
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'VariantDir',
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]
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GlobalDefaultBuilders = [
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# Supported builders.
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'CFile',
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'CXXFile',
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'DVI',
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'Jar',
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'Java',
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'JavaH',
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'Library',
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'M4',
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'MSVSProject',
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'Object',
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'PCH',
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'PDF',
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'PostScript',
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'Program',
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'RES',
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'RMIC',
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'SharedLibrary',
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'SharedObject',
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'StaticLibrary',
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'StaticObject',
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'Tar',
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'TypeLibrary',
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'Zip',
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'Package',
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]
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for name in GlobalDefaultEnvironmentFunctions + GlobalDefaultBuilders:
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exec "%s = _SConscript.DefaultEnvironmentCall(%s)" % (name, repr(name))
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del name
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# There are a handful of variables that used to live in the
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||
|
|
# Script/SConscript.py module that some SConscript files out there were
|
||
|
|
# accessing directly as SCons.Script.SConscript.*. The problem is that
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||
|
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# "SConscript" in this namespace is no longer a module, it's a global
|
||
|
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# function call--or more precisely, an object that implements a global
|
||
|
|
# function call through the default Environment. Nevertheless, we can
|
||
|
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# maintain backwards compatibility for SConscripts that were reaching in
|
||
|
|
# this way by hanging some attributes off the "SConscript" object here.
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SConscript = _SConscript.DefaultEnvironmentCall('SConscript')
|
||
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||
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# Make SConscript look enough like the module it used to be so
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||
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# that pychecker doesn't barf.
|
||
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|
SConscript.__name__ = 'SConscript'
|
||
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|
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||
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|
SConscript.Arguments = ARGUMENTS
|
||
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|
SConscript.ArgList = ARGLIST
|
||
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|
SConscript.BuildTargets = BUILD_TARGETS
|
||
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|
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)
|
||
|
|
|
||
|
|
# Local Variables:
|
||
|
|
# tab-width:4
|
||
|
|
# indent-tabs-mode:nil
|
||
|
|
# End:
|
||
|
|
# vim: set expandtab tabstop=4 shiftwidth=4:
|