717 lines
24 KiB
Python
717 lines
24 KiB
Python
"""SCons.Script.SConscript
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This module defines the Python API provided to SConscript and SConstruct
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files.
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"""
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#
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# Copyright (c) 2001, 2002, 2003, 2004 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__ = "/home/scons/scons/branch.0/baseline/src/engine/SCons/Script/SConscript.py 0.96.1.D001 2004/08/23 09:55:29 knight"
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import SCons
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import SCons.Action
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import SCons.Builder
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import SCons.Defaults
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import SCons.Environment
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import SCons.Errors
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import SCons.Node
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import SCons.Node.Alias
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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.SConf
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import SCons.Script
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import SCons.Tool
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import SCons.Util
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import os
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import os.path
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import re
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import string
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import sys
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import traceback
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import types
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import UserList
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launch_dir = os.path.abspath(os.curdir)
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def do_nothing(text): pass
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HelpFunction = do_nothing
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Arguments = {}
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ArgList = []
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CommandLineTargets = []
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DefaultCalled = None
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DefaultTargets = []
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GlobalDict = {}
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class TargetList(UserList.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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BuildTargets = TargetList()
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# global exports set by Export():
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global_exports = {}
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# chdir flag
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sconscript_chdir = 1
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# will be set to 1, if we are reading a SConscript
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sconscript_reading = 0
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def _scons_add_args(alist):
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for arg in alist:
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a, b = string.split(arg, '=', 1)
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Arguments[a] = b
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ArgList.append((a, b))
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def _scons_add_targets(tlist):
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if tlist:
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CommandLineTargets.extend(tlist)
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BuildTargets.extend(tlist)
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BuildTargets._add_Default = BuildTargets._do_nothing
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BuildTargets._clear = BuildTargets._do_nothing
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def get_calling_namespaces():
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"""Return the locals and globals for the function that called
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into this module in the current callstack."""
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try: 1/0
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except ZeroDivisionError: frame = sys.exc_info()[2].tb_frame
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while frame.f_globals.get("__name__") == __name__: frame = frame.f_back
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return frame.f_locals, frame.f_globals
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def compute_exports(exports):
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"""Compute a dictionary of exports given one of the parameters
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to the Export() function or the exports argument to SConscript()."""
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loc, glob = get_calling_namespaces()
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retval = {}
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try:
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for export in exports:
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if SCons.Util.is_Dict(export):
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retval.update(export)
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else:
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try:
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retval[export] = loc[export]
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except KeyError:
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retval[export] = glob[export]
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except KeyError, x:
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raise SCons.Errors.UserError, "Export of non-existent variable '%s'"%x
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return retval
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class Frame:
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"""A frame on the SConstruct/SConscript call stack"""
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def __init__(self, exports, sconscript):
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self.globals = BuildDefaultGlobals()
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self.retval = None
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self.prev_dir = SCons.Node.FS.default_fs.getcwd()
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self.exports = compute_exports(exports) # exports from the calling SConscript
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# make sure the sconscript attr is a Node.
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if isinstance(sconscript, SCons.Node.Node):
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self.sconscript = sconscript
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else:
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self.sconscript = SCons.Node.FS.default_fs.File(str(sconscript))
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# the SConstruct/SConscript call stack:
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stack = []
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# For documentation on the methods in this file, see the scons man-page
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def Return(*vars):
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retval = []
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try:
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for var in vars:
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for v in string.split(var):
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retval.append(stack[-1].globals[v])
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except KeyError, x:
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raise SCons.Errors.UserError, "Return of non-existent variable '%s'"%x
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if len(retval) == 1:
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stack[-1].retval = retval[0]
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else:
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stack[-1].retval = tuple(retval)
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def _SConscript(fs, *files, **kw):
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top = fs.Top
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sd = fs.SConstruct_dir.rdir()
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exports = kw.get('exports', [])
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# evaluate each SConscript file
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results = []
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for fn in files:
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stack.append(Frame(exports,fn))
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old_sys_path = sys.path
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try:
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global sconscript_reading
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sconscript_reading = 1
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if fn == "-":
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exec sys.stdin in stack[-1].globals
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else:
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if isinstance(fn, SCons.Node.Node):
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f = fn
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else:
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f = fs.File(str(fn))
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_file_ = None
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# Change directory to the top of the source
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# tree to make sure the os's cwd and the cwd of
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# fs match so we can open the SConscript.
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fs.chdir(top, change_os_dir=1)
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if f.rexists():
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_file_ = open(f.rstr(), "r")
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elif f.has_src_builder():
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# The SConscript file apparently exists in a source
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# code management system. Build it, but then clear
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# the builder so that it doesn't get built *again*
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# during the actual build phase.
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f.build()
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f.builder_set(None)
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s = str(f)
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if os.path.exists(s):
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_file_ = open(s, "r")
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if _file_:
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# Chdir to the SConscript directory. Use a path
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# name relative to the SConstruct file so that if
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# we're using the -f option, we're essentially
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# creating a parallel SConscript directory structure
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# in our local directory tree.
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#
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# XXX This is broken for multiple-repository cases
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# where the SConstruct and SConscript files might be
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# in different Repositories. For now, cross that
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# bridge when someone comes to it.
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ldir = fs.Dir(f.dir.get_path(sd))
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try:
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fs.chdir(ldir, change_os_dir=sconscript_chdir)
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except OSError:
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# There was no local directory, so we should be
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# able to chdir to the Repository directory.
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# Note that we do this directly, not through
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# fs.chdir(), because we still need to
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# interpret the stuff within the SConscript file
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# relative to where we are logically.
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fs.chdir(ldir, change_os_dir=0)
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os.chdir(f.rfile().dir.get_abspath())
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# Append the SConscript directory to the beginning
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# of sys.path so Python modules in the SConscript
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# directory can be easily imported.
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sys.path = [ f.dir.get_abspath() ] + sys.path
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# This is the magic line that actually reads up and
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# executes the stuff in the SConscript file. We
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# look for the "exec _file_ " from the beginning
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# of this line to find the right stack frame (the
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# next one) describing the SConscript file and line
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# number that creates a node.
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exec _file_ in stack[-1].globals
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else:
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SCons.Warnings.warn(SCons.Warnings.MissingSConscriptWarning,
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"Ignoring missing SConscript '%s'" % f.path)
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finally:
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sconscript_reading = 0
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sys.path = old_sys_path
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frame = stack.pop()
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try:
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fs.chdir(frame.prev_dir, change_os_dir=sconscript_chdir)
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except OSError:
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# There was no local directory, so chdir to the
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# Repository directory. Like above, we do this
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# directly.
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fs.chdir(frame.prev_dir, change_os_dir=0)
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os.chdir(frame.prev_dir.rdir().get_abspath())
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results.append(frame.retval)
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# if we only have one script, don't return a tuple
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if len(results) == 1:
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return results[0]
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else:
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return tuple(results)
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def is_our_exec_statement(line):
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return not line is None and line[:12] == "exec _file_ "
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def SConscript_exception(file=sys.stderr):
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"""Print an exception stack trace just for the SConscript file(s).
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This will show users who have Python errors where the problem is,
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without cluttering the output with all of the internal calls leading
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up to where we exec the SConscript."""
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exc_type, exc_value, exc_tb = sys.exc_info()
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stack = traceback.extract_tb(exc_tb)
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last_text = ""
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found = 0
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i = 0
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for frame in stack:
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if is_our_exec_statement(last_text):
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found = 1
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break
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i = i + 1
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last_text = frame[3]
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if not found:
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# We did not find our exec statement, so this was actually a bug
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# in SCons itself. Show the whole stack.
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i = 0
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type = str(exc_type)
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if type[:11] == "exceptions.":
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type = type[11:]
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file.write('%s: %s:\n' % (type, exc_value))
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for fname, line, func, text in stack[i:]:
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file.write(' File "%s", line %d:\n' % (fname, line))
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file.write(' %s\n' % text)
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def annotate(node):
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"""Annotate a node with the stack frame describing the
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SConscript file and line number that created it."""
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stack = traceback.extract_stack()
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last_text = ""
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for frame in stack:
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# If the script text of the previous frame begins with the
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# magic "exec _file_ " string, then this frame describes the
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# SConscript file and line number that caused this node to be
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# created. Record the tuple and carry on.
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if is_our_exec_statement(last_text):
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node.creator = frame
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return
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last_text = frame[3]
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# The following line would cause each Node to be annotated using the
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# above function. Unfortunately, this is a *huge* performance hit, so
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# leave this disabled until we find a more efficient mechanism.
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#SCons.Node.Annotate = annotate
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class SConsEnvironment(SCons.Environment.Base):
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"""An Environment subclass that contains all of the methods that
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are particular to the wrapper SCons interface and which aren't
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(or shouldn't be) part of the build engine itself.
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Note that not all of the methods of this class have corresponding
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global functions, there are some private methods.
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"""
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#
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# Private methods of an SConsEnvironment.
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#
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def _exceeds_version(self, major, minor, v_major, v_minor):
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"""Return 1 if 'major' and 'minor' are greater than the version
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in 'v_major' and 'v_minor', and 0 otherwise."""
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return (major > v_major or (major == v_major and minor > v_minor))
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def _get_major_minor(self, version_string):
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"""Split a version string into major and minor parts. This
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is complicated by the fact that a version string can be something
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like 3.2b1."""
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version = string.split(string.split(version_string, ' ')[0], '.')
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v_major = int(version[0])
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v_minor = int(re.match('\d+', version[1]).group())
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return v_major, v_minor
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def _get_SConscript_filenames(self, ls, kw):
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"""
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Convert the parameters passed to # SConscript() calls into a list
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of files and export variables. If the parameters are invalid,
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throws SCons.Errors.UserError. Returns a tuple (l, e) where l
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is a list of SConscript filenames and e is a list of exports.
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"""
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exports = []
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if len(ls) == 0:
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try:
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dirs = kw["dirs"]
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except KeyError:
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raise SCons.Errors.UserError, \
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"Invalid SConscript usage - no parameters"
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if not SCons.Util.is_List(dirs):
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dirs = [ dirs ]
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dirs = map(str, dirs)
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name = kw.get('name', 'SConscript')
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files = map(lambda n, name = name: os.path.join(n, name), dirs)
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elif len(ls) == 1:
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files = ls[0]
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elif len(ls) == 2:
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files = ls[0]
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exports = self.Split(ls[1])
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else:
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raise SCons.Errors.UserError, \
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"Invalid SConscript() usage - too many arguments"
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if not SCons.Util.is_List(files):
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files = [ files ]
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if kw.get('exports'):
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exports.extend(self.Split(kw['exports']))
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build_dir = kw.get('build_dir')
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if build_dir:
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if len(files) != 1:
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raise SCons.Errors.UserError, \
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"Invalid SConscript() usage - can only specify one SConscript with a build_dir"
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duplicate = kw.get('duplicate', 1)
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src_dir = kw.get('src_dir')
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if not src_dir:
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src_dir, fname = os.path.split(str(files[0]))
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else:
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if not isinstance(src_dir, SCons.Node.Node):
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src_dir = self.fs.Dir(src_dir)
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fn = files[0]
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if not isinstance(fn, SCons.Node.Node):
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fn = self.fs.File(fn)
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if fn.is_under(src_dir):
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# Get path relative to the source directory.
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fname = fn.get_path(src_dir)
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else:
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# Fast way to only get the terminal path component of a Node.
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fname = fn.get_path(fn.dir)
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self.fs.BuildDir(build_dir, src_dir, duplicate)
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files = [os.path.join(str(build_dir), fname)]
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return (files, exports)
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#
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# Public methods of an SConsEnvironment. These get
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# entry points in the global name space so they can be called
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# as global functions.
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#
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def Default(self, *targets):
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global DefaultCalled
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global DefaultTargets
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DefaultCalled = 1
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for t in targets:
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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 DefaultTargets, so that the
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# DEFAULT_TARGETS variable will still point to the
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# same object we point to.
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del DefaultTargets[:]
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BuildTargets._clear()
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elif isinstance(t, SCons.Node.Node):
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DefaultTargets.append(t)
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BuildTargets._add_Default([t])
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else:
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nodes = self.arg2nodes(t, self.fs.Entry)
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DefaultTargets.extend(nodes)
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BuildTargets._add_Default(nodes)
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def EnsureSConsVersion(self, major, minor):
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"""Exit abnormally if the SCons version is not late enough."""
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v_major, v_minor = self._get_major_minor(SCons.__version__)
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if self._exceeds_version(major, minor, v_major, v_minor):
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print "SCons %d.%d or greater required, but you have SCons %s" %(major,minor,SCons.__version__)
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sys.exit(2)
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def EnsurePythonVersion(self, major, minor):
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"""Exit abnormally if the Python version is not late enough."""
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try:
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v_major, v_minor, v_micro, release, serial = sys.version_info
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except AttributeError:
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v_major, v_minor = self._get_major_minor(sys.version)
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if self._exceeds_version(major, minor, v_major, v_minor):
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v = string.split(sys.version, " ", 1)[0]
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print "Python %d.%d or greater required, but you have Python %s" %(major,minor,v)
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sys.exit(2)
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def Exit(self, value=0):
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sys.exit(value)
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def Export(self, *vars):
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for var in vars:
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global_exports.update(compute_exports(self.Split(var)))
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def GetLaunchDir(self):
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global launch_dir
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return launch_dir
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def GetOption(self, name):
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name = self.subst(name)
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return SCons.Script.ssoptions.get(name)
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def Help(self, text):
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text = self.subst(text, raw=1)
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HelpFunction(text)
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def Import(self, *vars):
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try:
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for var in vars:
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var = self.Split(var)
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for v in var:
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if v == '*':
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stack[-1].globals.update(global_exports)
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stack[-1].globals.update(stack[-1].exports)
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else:
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if stack[-1].exports.has_key(v):
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stack[-1].globals[v] = stack[-1].exports[v]
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else:
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stack[-1].globals[v] = global_exports[v]
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except KeyError,x:
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raise SCons.Errors.UserError, "Import of non-existent variable '%s'"%x
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def SConscript(self, *ls, **kw):
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ls = map(lambda l, self=self: self.subst(l), ls)
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subst_kw = {}
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for key, val in kw.items():
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if SCons.Util.is_String(val):
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val = self.subst(val)
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elif SCons.Util.is_List(val):
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result = []
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for v in val:
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if SCons.Util.is_String(v):
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v = self.subst(v)
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result.append(v)
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val = result
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subst_kw[key] = val
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files, exports = self._get_SConscript_filenames(ls, subst_kw)
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return apply(_SConscript, [self.fs,] + files, {'exports' : exports})
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def SConscriptChdir(self, flag):
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global sconscript_chdir
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|
sconscript_chdir = flag
|
|
|
|
def SetOption(self, name, value):
|
|
name = self.subst(name)
|
|
SCons.Script.ssoptions.set(name, value)
|
|
|
|
#
|
|
#
|
|
#
|
|
SCons.Environment.Environment = SConsEnvironment
|
|
|
|
def Options(files=None, args=Arguments):
|
|
return SCons.Options.Options(files, args)
|
|
|
|
def SetBuildSignatureType(type):
|
|
SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
|
|
"The SetBuildSignatureType() function has been deprecated;\n" +\
|
|
"\tuse the TargetSignatures() function instead.")
|
|
SCons.Defaults.DefaultEnvironment().TargetSignatures(type)
|
|
|
|
def SetContentSignatureType(type):
|
|
SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
|
|
"The SetContentSignatureType() function has been deprecated;\n" +\
|
|
"\tuse the SourceSignatures() function instead.")
|
|
SCons.Defaults.DefaultEnvironment().SourceSignatures(type)
|
|
|
|
def GetJobs():
|
|
SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
|
|
"The GetJobs() function has been deprecated;\n" +\
|
|
"\tuse GetOption('num_jobs') instead.")
|
|
|
|
return GetOption('num_jobs')
|
|
|
|
def SetJobs(num):
|
|
SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
|
|
"The SetJobs() function has been deprecated;\n" +\
|
|
"\tuse SetOption('num_jobs', num) instead.")
|
|
SetOption('num_jobs', num)
|
|
|
|
def ParseConfig(env, command, function=None):
|
|
SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
|
|
"The ParseConfig() function has been deprecated;\n" +\
|
|
"\tuse the env.ParseConfig() method instead.")
|
|
return env.ParseConfig(command, function)
|
|
|
|
#
|
|
_DefaultEnvironmentProxy = None
|
|
|
|
def get_DefaultEnvironmentProxy():
|
|
global _DefaultEnvironmentProxy
|
|
if not _DefaultEnvironmentProxy:
|
|
default_env = SCons.Defaults.DefaultEnvironment()
|
|
_DefaultEnvironmentProxy = SCons.Environment.NoSubstitutionProxy(default_env)
|
|
return _DefaultEnvironmentProxy
|
|
|
|
class DefaultEnvironmentCall:
|
|
"""A class that implements "global function" calls of
|
|
Environment methods by fetching the specified method from the
|
|
DefaultEnvironment's class. Note that this uses an intermediate
|
|
proxy class instead of calling the DefaultEnvironment method
|
|
directly so that the proxy can override the subst() method and
|
|
thereby prevent expansion of construction variables (since from
|
|
the user's point of view this was called as a global function,
|
|
with no associated construction environment)."""
|
|
def __init__(self, method_name):
|
|
self.method_name = method_name
|
|
def __call__(self, *args, **kw):
|
|
proxy = get_DefaultEnvironmentProxy()
|
|
method = getattr(proxy, self.method_name)
|
|
return apply(method, args, kw)
|
|
|
|
# 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',
|
|
'GetOption',
|
|
'Help',
|
|
'Import',
|
|
'SConscript',
|
|
'SConscriptChdir',
|
|
'SetOption',
|
|
|
|
# Methods from the Environment.Base class.
|
|
'AddPostAction',
|
|
'AddPreAction',
|
|
'Alias',
|
|
'AlwaysBuild',
|
|
'BuildDir',
|
|
'CacheDir',
|
|
'Clean',
|
|
'Command',
|
|
'Depends',
|
|
'Dir',
|
|
'Execute',
|
|
'File',
|
|
'FindFile',
|
|
'Flatten',
|
|
'GetBuildPath',
|
|
'Ignore',
|
|
'Install',
|
|
'InstallAs',
|
|
'Literal',
|
|
'Local',
|
|
'Precious',
|
|
'Repository',
|
|
'SConsignFile',
|
|
'SideEffect',
|
|
'SourceCode',
|
|
'SourceSignatures',
|
|
'Split',
|
|
'TargetSignatures',
|
|
'Value',
|
|
]
|
|
|
|
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',
|
|
]
|
|
|
|
for name in GlobalDefaultEnvironmentFunctions + GlobalDefaultBuilders:
|
|
GlobalDict[name] = DefaultEnvironmentCall(name)
|
|
|
|
def BuildDefaultGlobals():
|
|
"""
|
|
Create a dictionary containing all the default globals for
|
|
SConstruct and SConscript files.
|
|
"""
|
|
|
|
globals = {
|
|
# Global functions that don't get executed through the
|
|
# default Environment.
|
|
'Action' : SCons.Action.Action,
|
|
'BoolOption' : SCons.Options.BoolOption,
|
|
'Builder' : SCons.Builder.Builder,
|
|
'Configure' : SCons.SConf.SConf,
|
|
'EnumOption' : SCons.Options.EnumOption,
|
|
'Environment' : SCons.Environment.Environment,
|
|
'ListOption' : SCons.Options.ListOption,
|
|
'Options' : Options,
|
|
'PackageOption' : SCons.Options.PackageOption,
|
|
'PathOption' : SCons.Options.PathOption,
|
|
'Platform' : SCons.Platform.Platform,
|
|
'Return' : Return,
|
|
'Scanner' : SCons.Scanner.Base,
|
|
'Tool' : SCons.Tool.Tool,
|
|
'WhereIs' : SCons.Util.WhereIs,
|
|
|
|
# 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,
|
|
|
|
# Other variables we provide.
|
|
'ARGUMENTS' : Arguments,
|
|
'ARGLIST' : ArgList,
|
|
'BUILD_TARGETS' : BuildTargets,
|
|
'COMMAND_LINE_TARGETS' : CommandLineTargets,
|
|
'DEFAULT_TARGETS' : DefaultTargets,
|
|
}
|
|
|
|
# Functions we might still convert to Environment methods.
|
|
globals['CScan'] = SCons.Defaults.CScan
|
|
globals['DefaultEnvironment'] = SCons.Defaults.DefaultEnvironment
|
|
|
|
# Deprecated functions, leave these here for now.
|
|
globals['GetJobs'] = GetJobs
|
|
globals['ParseConfig'] = ParseConfig
|
|
globals['SetBuildSignatureType'] = SetBuildSignatureType
|
|
globals['SetContentSignatureType'] = SetContentSignatureType
|
|
globals['SetJobs'] = SetJobs
|
|
|
|
globals.update(GlobalDict)
|
|
|
|
return globals
|