--- /dev/null
+"""SCons.Script.SConscript
+
+This module defines the Python API provided to SConscript and SConstruct
+files.
+
+"""
+
+#
+# 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/SConscript.py 3842 2008/12/20 22:59:52 scons"
+
+import SCons
+import SCons.Action
+import SCons.Builder
+import SCons.Defaults
+import SCons.Environment
+import SCons.Errors
+import SCons.Node
+import SCons.Node.Alias
+import SCons.Node.FS
+import SCons.Platform
+import SCons.SConf
+import SCons.Script.Main
+import SCons.Tool
+import SCons.Util
+
+import os
+import os.path
+import re
+import string
+import sys
+import traceback
+import types
+import UserList
+
+# The following variables used to live in this module. Some
+# SConscript files out there may have referred to them directly as
+# SCons.Script.SConscript.*. This is now supported by some special
+# handling towards the bottom of the SConscript.__init__.py module.
+#Arguments = {}
+#ArgList = []
+#BuildTargets = TargetList()
+#CommandLineTargets = []
+#DefaultTargets = []
+
+class SConscriptReturn(Exception):
+ pass
+
+launch_dir = os.path.abspath(os.curdir)
+
+GlobalDict = None
+
+# global exports set by Export():
+global_exports = {}
+
+# chdir flag
+sconscript_chdir = 1
+
+def get_calling_namespaces():
+ """Return the locals and globals for the function that called
+ into this module in the current call stack."""
+ try: 1/0
+ except ZeroDivisionError:
+ # Don't start iterating with the current stack-frame to
+ # prevent creating reference cycles (f_back is safe).
+ frame = sys.exc_info()[2].tb_frame.f_back
+
+ # Find the first frame that *isn't* from this file. This means
+ # that we expect all of the SCons frames that implement an Export()
+ # or SConscript() call to be in this file, so that we can identify
+ # the first non-Script.SConscript frame as the user's local calling
+ # environment, and the locals and globals dictionaries from that
+ # frame as the calling namespaces. See the comment below preceding
+ # the DefaultEnvironmentCall block for even more explanation.
+ while frame.f_globals.get("__name__") == __name__:
+ frame = frame.f_back
+
+ return frame.f_locals, frame.f_globals
+
+
+def compute_exports(exports):
+ """Compute a dictionary of exports given one of the parameters
+ to the Export() function or the exports argument to SConscript()."""
+
+ loc, glob = get_calling_namespaces()
+
+ retval = {}
+ try:
+ for export in exports:
+ if SCons.Util.is_Dict(export):
+ retval.update(export)
+ else:
+ try:
+ retval[export] = loc[export]
+ except KeyError:
+ retval[export] = glob[export]
+ except KeyError, x:
+ raise SCons.Errors.UserError, "Export of non-existent variable '%s'"%x
+
+ return retval
+
+class Frame:
+ """A frame on the SConstruct/SConscript call stack"""
+ def __init__(self, fs, exports, sconscript):
+ self.globals = BuildDefaultGlobals()
+ self.retval = None
+ self.prev_dir = fs.getcwd()
+ self.exports = compute_exports(exports) # exports from the calling SConscript
+ # make sure the sconscript attr is a Node.
+ if isinstance(sconscript, SCons.Node.Node):
+ self.sconscript = sconscript
+ elif sconscript == '-':
+ self.sconscript = None
+ else:
+ self.sconscript = fs.File(str(sconscript))
+
+# the SConstruct/SConscript call stack:
+call_stack = []
+
+# For documentation on the methods in this file, see the scons man-page
+
+def Return(*vars, **kw):
+ retval = []
+ try:
+ fvars = SCons.Util.flatten(vars)
+ for var in fvars:
+ for v in string.split(var):
+ retval.append(call_stack[-1].globals[v])
+ except KeyError, x:
+ raise SCons.Errors.UserError, "Return of non-existent variable '%s'"%x
+
+ if len(retval) == 1:
+ call_stack[-1].retval = retval[0]
+ else:
+ call_stack[-1].retval = tuple(retval)
+
+ stop = kw.get('stop', True)
+
+ if stop:
+ raise SConscriptReturn
+
+
+stack_bottom = '% Stack boTTom %' # hard to define a variable w/this name :)
+
+def _SConscript(fs, *files, **kw):
+ top = fs.Top
+ sd = fs.SConstruct_dir.rdir()
+ exports = kw.get('exports', [])
+
+ # evaluate each SConscript file
+ results = []
+ for fn in files:
+ call_stack.append(Frame(fs, exports, fn))
+ old_sys_path = sys.path
+ try:
+ SCons.Script.sconscript_reading = SCons.Script.sconscript_reading + 1
+ if fn == "-":
+ exec sys.stdin in call_stack[-1].globals
+ else:
+ if isinstance(fn, SCons.Node.Node):
+ f = fn
+ else:
+ f = fs.File(str(fn))
+ _file_ = None
+
+ # Change directory to the top of the source
+ # tree to make sure the os's cwd and the cwd of
+ # fs match so we can open the SConscript.
+ fs.chdir(top, change_os_dir=1)
+ if f.rexists():
+ _file_ = open(f.rfile().get_abspath(), "r")
+ elif f.has_src_builder():
+ # The SConscript file apparently exists in a source
+ # code management system. Build it, but then clear
+ # the builder so that it doesn't get built *again*
+ # during the actual build phase.
+ f.build()
+ f.built()
+ f.builder_set(None)
+ if f.exists():
+ _file_ = open(f.get_abspath(), "r")
+ if _file_:
+ # Chdir to the SConscript directory. Use a path
+ # name relative to the SConstruct file so that if
+ # we're using the -f option, we're essentially
+ # creating a parallel SConscript directory structure
+ # in our local directory tree.
+ #
+ # XXX This is broken for multiple-repository cases
+ # where the SConstruct and SConscript files might be
+ # in different Repositories. For now, cross that
+ # bridge when someone comes to it.
+ try:
+ src_dir = kw['src_dir']
+ except KeyError:
+ ldir = fs.Dir(f.dir.get_path(sd))
+ else:
+ ldir = fs.Dir(src_dir)
+ if not ldir.is_under(f.dir):
+ # They specified a source directory, but
+ # it's above the SConscript directory.
+ # Do the sensible thing and just use the
+ # SConcript directory.
+ ldir = fs.Dir(f.dir.get_path(sd))
+ try:
+ fs.chdir(ldir, change_os_dir=sconscript_chdir)
+ except OSError:
+ # There was no local directory, so we should be
+ # able to chdir to the Repository directory.
+ # Note that we do this directly, not through
+ # fs.chdir(), because we still need to
+ # interpret the stuff within the SConscript file
+ # relative to where we are logically.
+ fs.chdir(ldir, change_os_dir=0)
+ # TODO Not sure how to handle src_dir here
+ os.chdir(f.rfile().dir.get_abspath())
+
+ # Append the SConscript directory to the beginning
+ # of sys.path so Python modules in the SConscript
+ # directory can be easily imported.
+ sys.path = [ f.dir.get_abspath() ] + sys.path
+
+ # This is the magic line that actually reads up
+ # and executes the stuff in the SConscript file.
+ # The locals for this frame contain the special
+ # bottom-of-the-stack marker so that any
+ # exceptions that occur when processing this
+ # SConscript can base the printed frames at this
+ # level and not show SCons internals as well.
+ call_stack[-1].globals.update({stack_bottom:1})
+ old_file = call_stack[-1].globals.get('__file__')
+ try:
+ del call_stack[-1].globals['__file__']
+ except KeyError:
+ pass
+ try:
+ try:
+ exec _file_ in call_stack[-1].globals
+ except SConscriptReturn:
+ pass
+ finally:
+ if old_file is not None:
+ call_stack[-1].globals.update({__file__:old_file})
+ else:
+ SCons.Warnings.warn(SCons.Warnings.MissingSConscriptWarning,
+ "Ignoring missing SConscript '%s'" % f.path)
+
+ finally:
+ SCons.Script.sconscript_reading = SCons.Script.sconscript_reading - 1
+ sys.path = old_sys_path
+ frame = call_stack.pop()
+ try:
+ fs.chdir(frame.prev_dir, change_os_dir=sconscript_chdir)
+ except OSError:
+ # There was no local directory, so chdir to the
+ # Repository directory. Like above, we do this
+ # directly.
+ fs.chdir(frame.prev_dir, change_os_dir=0)
+ rdir = frame.prev_dir.rdir()
+ rdir._create() # Make sure there's a directory there.
+ try:
+ os.chdir(rdir.get_abspath())
+ except OSError, e:
+ # We still couldn't chdir there, so raise the error,
+ # but only if actions are being executed.
+ #
+ # If the -n option was used, the directory would *not*
+ # have been created and we should just carry on and
+ # let things muddle through. This isn't guaranteed
+ # to work if the SConscript files are reading things
+ # from disk (for example), but it should work well
+ # enough for most configurations.
+ if SCons.Action.execute_actions:
+ raise e
+
+ results.append(frame.retval)
+
+ # if we only have one script, don't return a tuple
+ if len(results) == 1:
+ return results[0]
+ else:
+ return tuple(results)
+
+def SConscript_exception(file=sys.stderr):
+ """Print an exception stack trace just for the SConscript file(s).
+ This will show users who have Python errors where the problem is,
+ without cluttering the output with all of the internal calls leading
+ up to where we exec the SConscript."""
+ exc_type, exc_value, exc_tb = sys.exc_info()
+ tb = exc_tb
+ while tb and not tb.tb_frame.f_locals.has_key(stack_bottom):
+ tb = tb.tb_next
+ if not tb:
+ # We did not find our exec statement, so this was actually a bug
+ # in SCons itself. Show the whole stack.
+ tb = exc_tb
+ stack = traceback.extract_tb(tb)
+ try:
+ type = exc_type.__name__
+ except AttributeError:
+ type = str(exc_type)
+ if type[:11] == "exceptions.":
+ type = type[11:]
+ file.write('%s: %s:\n' % (type, exc_value))
+ for fname, line, func, text in stack:
+ file.write(' File "%s", line %d:\n' % (fname, line))
+ file.write(' %s\n' % text)
+
+def annotate(node):
+ """Annotate a node with the stack frame describing the
+ SConscript file and line number that created it."""
+ tb = sys.exc_info()[2]
+ while tb and not tb.tb_frame.f_locals.has_key(stack_bottom):
+ tb = tb.tb_next
+ if not tb:
+ # We did not find any exec of an SConscript file: what?!
+ raise SCons.Errors.InternalError, "could not find SConscript stack frame"
+ node.creator = traceback.extract_stack(tb)[0]
+
+# The following line would cause each Node to be annotated using the
+# above function. Unfortunately, this is a *huge* performance hit, so
+# leave this disabled until we find a more efficient mechanism.
+#SCons.Node.Annotate = annotate
+
+class SConsEnvironment(SCons.Environment.Base):
+ """An Environment subclass that contains all of the methods that
+ are particular to the wrapper SCons interface and which aren't
+ (or shouldn't be) part of the build engine itself.
+
+ Note that not all of the methods of this class have corresponding
+ global functions, there are some private methods.
+ """
+
+ #
+ # Private methods of an SConsEnvironment.
+ #
+ def _exceeds_version(self, major, minor, v_major, v_minor):
+ """Return 1 if 'major' and 'minor' are greater than the version
+ in 'v_major' and 'v_minor', and 0 otherwise."""
+ return (major > v_major or (major == v_major and minor > v_minor))
+
+ def _get_major_minor_revision(self, version_string):
+ """Split a version string into major, minor and (optionally)
+ revision parts.
+
+ This is complicated by the fact that a version string can be
+ something like 3.2b1."""
+ version = string.split(string.split(version_string, ' ')[0], '.')
+ v_major = int(version[0])
+ v_minor = int(re.match('\d+', version[1]).group())
+ if len(version) >= 3:
+ v_revision = int(re.match('\d+', version[2]).group())
+ else:
+ v_revision = 0
+ return v_major, v_minor, v_revision
+
+ def _get_SConscript_filenames(self, ls, kw):
+ """
+ Convert the parameters passed to # SConscript() calls into a list
+ of files and export variables. If the parameters are invalid,
+ throws SCons.Errors.UserError. Returns a tuple (l, e) where l
+ is a list of SConscript filenames and e is a list of exports.
+ """
+ exports = []
+
+ if len(ls) == 0:
+ try:
+ dirs = kw["dirs"]
+ except KeyError:
+ raise SCons.Errors.UserError, \
+ "Invalid SConscript usage - no parameters"
+
+ if not SCons.Util.is_List(dirs):
+ dirs = [ dirs ]
+ dirs = map(str, dirs)
+
+ name = kw.get('name', 'SConscript')
+
+ files = map(lambda n, name = name: os.path.join(n, name), dirs)
+
+ elif len(ls) == 1:
+
+ files = ls[0]
+
+ elif len(ls) == 2:
+
+ files = ls[0]
+ exports = self.Split(ls[1])
+
+ else:
+
+ raise SCons.Errors.UserError, \
+ "Invalid SConscript() usage - too many arguments"
+
+ if not SCons.Util.is_List(files):
+ files = [ files ]
+
+ if kw.get('exports'):
+ exports.extend(self.Split(kw['exports']))
+
+ variant_dir = kw.get('variant_dir') or kw.get('build_dir')
+ if variant_dir:
+ if len(files) != 1:
+ raise SCons.Errors.UserError, \
+ "Invalid SConscript() usage - can only specify one SConscript with a variant_dir"
+ duplicate = kw.get('duplicate', 1)
+ src_dir = kw.get('src_dir')
+ if not src_dir:
+ src_dir, fname = os.path.split(str(files[0]))
+ files = [os.path.join(str(variant_dir), fname)]
+ else:
+ if not isinstance(src_dir, SCons.Node.Node):
+ src_dir = self.fs.Dir(src_dir)
+ fn = files[0]
+ if not isinstance(fn, SCons.Node.Node):
+ fn = self.fs.File(fn)
+ if fn.is_under(src_dir):
+ # Get path relative to the source directory.
+ fname = fn.get_path(src_dir)
+ files = [os.path.join(str(variant_dir), fname)]
+ else:
+ files = [fn.abspath]
+ kw['src_dir'] = variant_dir
+ self.fs.VariantDir(variant_dir, src_dir, duplicate)
+
+ return (files, exports)
+
+ #
+ # Public methods of an SConsEnvironment. These get
+ # entry points in the global name space so they can be called
+ # as global functions.
+ #
+
+ def Configure(self, *args, **kw):
+ if not SCons.Script.sconscript_reading:
+ raise SCons.Errors.UserError, "Calling Configure from Builders is not supported."
+ kw['_depth'] = kw.get('_depth', 0) + 1
+ return apply(SCons.Environment.Base.Configure, (self,)+args, kw)
+
+ def Default(self, *targets):
+ SCons.Script._Set_Default_Targets(self, targets)
+
+ def EnsureSConsVersion(self, major, minor, revision=0):
+ """Exit abnormally if the SCons version is not late enough."""
+ scons_ver = self._get_major_minor_revision(SCons.__version__)
+ if scons_ver < (major, minor, revision):
+ if revision:
+ scons_ver_string = '%d.%d.%d' % (major, minor, revision)
+ else:
+ scons_ver_string = '%d.%d' % (major, minor)
+ print "SCons %s or greater required, but you have SCons %s" % \
+ (scons_ver_string, SCons.__version__)
+ sys.exit(2)
+
+ def EnsurePythonVersion(self, major, minor):
+ """Exit abnormally if the Python version is not late enough."""
+ try:
+ v_major, v_minor, v_micro, release, serial = sys.version_info
+ python_ver = (v_major, v_minor)
+ except AttributeError:
+ python_ver = self._get_major_minor_revision(sys.version)[:2]
+ if python_ver < (major, minor):
+ v = string.split(sys.version, " ", 1)[0]
+ print "Python %d.%d or greater required, but you have Python %s" %(major,minor,v)
+ sys.exit(2)
+
+ def Exit(self, value=0):
+ sys.exit(value)
+
+ def Export(self, *vars):
+ for var in vars:
+ global_exports.update(compute_exports(self.Split(var)))
+
+ def GetLaunchDir(self):
+ global launch_dir
+ return launch_dir
+
+ def GetOption(self, name):
+ name = self.subst(name)
+ return SCons.Script.Main.GetOption(name)
+
+ def Help(self, text):
+ text = self.subst(text, raw=1)
+ SCons.Script.HelpFunction(text)
+
+ def Import(self, *vars):
+ try:
+ frame = call_stack[-1]
+ globals = frame.globals
+ exports = frame.exports
+ for var in vars:
+ var = self.Split(var)
+ for v in var:
+ if v == '*':
+ globals.update(global_exports)
+ globals.update(exports)
+ else:
+ if exports.has_key(v):
+ globals[v] = exports[v]
+ else:
+ globals[v] = global_exports[v]
+ except KeyError,x:
+ raise SCons.Errors.UserError, "Import of non-existent variable '%s'"%x
+
+ def SConscript(self, *ls, **kw):
+ def subst_element(x, subst=self.subst):
+ if SCons.Util.is_List(x):
+ x = map(subst, x)
+ else:
+ x = subst(x)
+ return x
+ ls = map(subst_element, ls)
+ subst_kw = {}
+ for key, val in kw.items():
+ if SCons.Util.is_String(val):
+ val = self.subst(val)
+ elif SCons.Util.is_List(val):
+ result = []
+ for v in val:
+ if SCons.Util.is_String(v):
+ v = self.subst(v)
+ result.append(v)
+ val = result
+ subst_kw[key] = val
+
+ files, exports = self._get_SConscript_filenames(ls, subst_kw)
+ subst_kw['exports'] = exports
+ return apply(_SConscript, [self.fs,] + files, subst_kw)
+
+ def SConscriptChdir(self, flag):
+ global sconscript_chdir
+ sconscript_chdir = flag
+
+ def SetOption(self, name, value):
+ name = self.subst(name)
+ SCons.Script.Main.SetOption(name, value)
+
+#
+#
+#
+SCons.Environment.Environment = SConsEnvironment
+
+def Configure(*args, **kw):
+ if not SCons.Script.sconscript_reading:
+ raise SCons.Errors.UserError, "Calling Configure from Builders is not supported."
+ kw['_depth'] = 1
+ return apply(SCons.SConf.SConf, args, kw)
+
+# It's very important that the DefaultEnvironmentCall() class stay in this
+# file, with the get_calling_namespaces() function, the compute_exports()
+# function, the Frame class and the SConsEnvironment.Export() method.
+# These things make up the calling stack leading up to the actual global
+# Export() or SConscript() call that the user issued. We want to allow
+# users to export local variables that they define, like so:
+#
+# def func():
+# x = 1
+# Export('x')
+#
+# To support this, the get_calling_namespaces() function assumes that
+# the *first* stack frame that's not from this file is the local frame
+# for the Export() or SConscript() call.
+
+_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, subst=0):
+ self.method_name = method_name
+ if subst:
+ self.factory = SCons.Defaults.DefaultEnvironment
+ else:
+ self.factory = get_DefaultEnvironmentProxy
+ def __call__(self, *args, **kw):
+ env = self.factory()
+ method = getattr(env, self.method_name)
+ return apply(method, args, kw)
+
+
+def BuildDefaultGlobals():
+ """
+ Create a dictionary containing all the default globals for
+ SConstruct and SConscript files.
+ """
+
+ global GlobalDict
+ if GlobalDict is None:
+ GlobalDict = {}
+
+ import SCons.Script
+ d = SCons.Script.__dict__
+ def not_a_module(m, d=d, mtype=type(SCons.Script)):
+ return type(d[m]) != mtype
+ for m in filter(not_a_module, dir(SCons.Script)):
+ GlobalDict[m] = d[m]
+
+ return GlobalDict.copy()
projects / senf.git / blobdiff