__init__.py
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- """SCons.Platform
- SCons platform selection.
- This looks for modules that define a callable object that can modify a
- construction environment as appropriate for a given platform.
- Note that we take a more simplistic view of "platform" than Python does.
- We're looking for a single string that determines a set of
- tool-independent variables with which to initialize a construction
- environment. Consequently, we'll examine both sys.platform and os.name
- (and anything else that might come in to play) in order to return some
- specification which is unique enough for our purposes.
- Note that because this subsysem just *selects* a callable that can
- modify a construction environment, it's possible for people to define
- their own "platform specification" in an arbitrary callable function.
- No one needs to use or tie in to this subsystem in order to roll
- their own platform definition.
- """
- #
- # 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/Platform/__init__.py 3057 2008/06/09 22:21:00 knight"
- import imp
- import os
- import string
- import sys
- import tempfile
- import SCons.Errors
- import SCons.Tool
- def platform_default():
- """Return the platform string for our execution environment.
- The returned value should map to one of the SCons/Platform/*.py
- files. Since we're architecture independent, though, we don't
- care about the machine architecture.
- """
- osname = os.name
- if osname == 'java':
- osname = os._osType
- if osname == 'posix':
- if sys.platform == 'cygwin':
- return 'cygwin'
- elif string.find(sys.platform, 'irix') != -1:
- return 'irix'
- elif string.find(sys.platform, 'sunos') != -1:
- return 'sunos'
- elif string.find(sys.platform, 'hp-ux') != -1:
- return 'hpux'
- elif string.find(sys.platform, 'aix') != -1:
- return 'aix'
- elif string.find(sys.platform, 'darwin') != -1:
- return 'darwin'
- else:
- return 'posix'
- elif os.name == 'os2':
- return 'os2'
- else:
- return sys.platform
- def platform_module(name = platform_default()):
- """Return the imported module for the platform.
- This looks for a module name that matches the specified argument.
- If the name is unspecified, we fetch the appropriate default for
- our execution environment.
- """
- full_name = 'SCons.Platform.' + name
- if not sys.modules.has_key(full_name):
- if os.name == 'java':
- eval(full_name)
- else:
- try:
- file, path, desc = imp.find_module(name,
- sys.modules['SCons.Platform'].__path__)
- try:
- mod = imp.load_module(full_name, file, path, desc)
- finally:
- if file:
- file.close()
- except ImportError:
- try:
- import zipimport
- importer = zipimport.zipimporter( sys.modules['SCons.Platform'].__path__[0] )
- mod = importer.load_module(full_name)
- except ImportError:
- raise SCons.Errors.UserError, "No platform named '%s'" % name
- setattr(SCons.Platform, name, mod)
- return sys.modules[full_name]
- def DefaultToolList(platform, env):
- """Select a default tool list for the specified platform.
- """
- return SCons.Tool.tool_list(platform, env)
- class PlatformSpec:
- def __init__(self, name):
- self.name = name
- def __str__(self):
- return self.name
-
- class TempFileMunge:
- """A callable class. You can set an Environment variable to this,
- then call it with a string argument, then it will perform temporary
- file substitution on it. This is used to circumvent the long command
- line limitation.
- Example usage:
- env["TEMPFILE"] = TempFileMunge
- env["LINKCOM"] = "${TEMPFILE('$LINK $TARGET $SOURCES')}"
- By default, the name of the temporary file used begins with a
- prefix of '@'. This may be configred for other tool chains by
- setting '$TEMPFILEPREFIX'.
- env["TEMPFILEPREFIX"] = '-@' # diab compiler
- env["TEMPFILEPREFIX"] = '-via' # arm tool chain
- """
- def __init__(self, cmd):
- self.cmd = cmd
- def __call__(self, target, source, env, for_signature):
- if for_signature:
- return self.cmd
- cmd = env.subst_list(self.cmd, 0, target, source)[0]
- try:
- maxline = int(env.subst('$MAXLINELENGTH'))
- except ValueError:
- maxline = 2048
- if (reduce(lambda x, y: x + len(y), cmd, 0) + len(cmd)) <= maxline:
- return self.cmd
- # We do a normpath because mktemp() has what appears to be
- # a bug in Windows that will use a forward slash as a path
- # delimiter. Windows's link mistakes that for a command line
- # switch and barfs.
- #
- # We use the .lnk suffix for the benefit of the Phar Lap
- # linkloc linker, which likes to append an .lnk suffix if
- # none is given.
- tmp = os.path.normpath(tempfile.mktemp('.lnk'))
- native_tmp = SCons.Util.get_native_path(tmp)
- if env['SHELL'] and env['SHELL'] == 'sh':
- # The sh shell will try to escape the backslashes in the
- # path, so unescape them.
- native_tmp = string.replace(native_tmp, '\', r'\\')
- # In Cygwin, we want to use rm to delete the temporary
- # file, because del does not exist in the sh shell.
- rm = env.Detect('rm') or 'del'
- else:
- # Don't use 'rm' if the shell is not sh, because rm won't
- # work with the Windows shells (cmd.exe or command.com) or
- # Windows path names.
- rm = 'del'
- prefix = env.subst('$TEMPFILEPREFIX')
- if not prefix:
- prefix = '@'
- args = map(SCons.Subst.quote_spaces, cmd[1:])
- open(tmp, 'w').write(string.join(args, " ") + "n")
- # XXX Using the SCons.Action.print_actions value directly
- # like this is bogus, but expedient. This class should
- # really be rewritten as an Action that defines the
- # __call__() and strfunction() methods and lets the
- # normal action-execution logic handle whether or not to
- # print/execute the action. The problem, though, is all
- # of that is decided before we execute this method as
- # part of expanding the $TEMPFILE construction variable.
- # Consequently, refactoring this will have to wait until
- # we get more flexible with allowing Actions to exist
- # independently and get strung together arbitrarily like
- # Ant tasks. In the meantime, it's going to be more
- # user-friendly to not let obsession with architectural
- # purity get in the way of just being helpful, so we'll
- # reach into SCons.Action directly.
- if SCons.Action.print_actions:
- print("Using tempfile "+native_tmp+" for command line:n"+
- str(cmd[0]) + " " + string.join(args," "))
- return [ cmd[0], prefix + native_tmp + 'n' + rm, native_tmp ]
-
- def Platform(name = platform_default()):
- """Select a canned Platform specification.
- """
- module = platform_module(name)
- spec = PlatformSpec(name)
- spec.__call__ = module.generate
- return spec