diff options
Diffstat (limited to 'engine/SCons/compat/__init__.py')
| -rw-r--r-- | engine/SCons/compat/__init__.py | 161 |
1 files changed, 32 insertions, 129 deletions
diff --git a/engine/SCons/compat/__init__.py b/engine/SCons/compat/__init__.py index 62f28f2..000b81f 100644 --- a/engine/SCons/compat/__init__.py +++ b/engine/SCons/compat/__init__.py @@ -1,5 +1,5 @@ # -# Copyright (c) 2001 - 2015 The SCons Foundation +# Copyright (c) 2001 - 2016 The SCons Foundation # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the @@ -35,9 +35,6 @@ the builtins namespace or the global module list so that the rest of our code can use the objects and names imported here regardless of Python version. -Simply enough, things that go in the builtins name space come from -our _scons_builtins module. - The rest of the things here will be in individual compatibility modules that are either: 1) suitably modified copies of the future modules that we want to use; or 2) backwards compatible re-implementations of the @@ -60,7 +57,7 @@ function defined below loads the module as the "real" name (without the rest of our code will find our pre-loaded compatibility module. """ -__revision__ = "src/engine/SCons/compat/__init__.py rel_2.4.1:3453:73fefd3ea0b0 2015/11/09 03:25:05 bdbaddog" +__revision__ = "src/engine/SCons/compat/__init__.py rel_2.5.0:3543:937e55cd78f7 2016/04/09 11:29:54 bdbaddog" import os import sys @@ -85,93 +82,8 @@ def rename_module(new, old): except ImportError: return False - -rename_module('builtins', '__builtin__') -import _scons_builtins - - -try: - import hashlib -except ImportError: - # Pre-2.5 Python has no hashlib module. - try: - import_as('_scons_hashlib', 'hashlib') - except ImportError: - # If we failed importing our compatibility module, it probably - # means this version of Python has no md5 module. Don't do - # anything and let the higher layer discover this fact, so it - # can fall back to using timestamp. - pass - -try: - set -except NameError: - # Pre-2.4 Python has no native set type - import_as('_scons_sets', 'sets') - import builtins, sets - builtins.set = sets.Set - - -try: - import collections -except ImportError: - # Pre-2.4 Python has no collections module. - import_as('_scons_collections', 'collections') -else: - try: - collections.UserDict - except AttributeError: - exec('from UserDict import UserDict as _UserDict') - collections.UserDict = _UserDict - del _UserDict - try: - collections.UserList - except AttributeError: - exec('from UserList import UserList as _UserList') - collections.UserList = _UserList - del _UserList - try: - collections.UserString - except AttributeError: - exec('from UserString import UserString as _UserString') - collections.UserString = _UserString - del _UserString - - -try: - import io -except ImportError: - # Pre-2.6 Python has no io module. - import_as('_scons_io', 'io') - - -try: - os.devnull -except AttributeError: - # Pre-2.4 Python has no os.devnull attribute - _names = sys.builtin_module_names - if 'posix' in _names: - os.devnull = '/dev/null' - elif 'nt' in _names: - os.devnull = 'nul' - os.path.devnull = os.devnull -try: - os.path.lexists -except AttributeError: - # Pre-2.4 Python has no os.path.lexists function - def lexists(path): - return os.path.exists(path) or os.path.islink(path) - os.path.lexists = lexists - - -# When we're using the '-3' option during regression tests, importing -# cPickle gives a warning no matter how it's done, so always use the -# real profile module, whether it's fast or not. -if os.environ.get('SCONS_HORRIBLE_REGRESSION_TEST_HACK') is None: - # Not a regression test with '-3', so try to use faster version. - # In 3.x, 'pickle' automatically loads the fast version if available. - rename_module('pickle', 'cPickle') - +# In 3.x, 'pickle' automatically loads the fast version if available. +rename_module('pickle', 'cPickle') # In 3.x, 'profile' automatically loads the fast version if available. rename_module('profile', 'cProfile') @@ -185,49 +97,40 @@ rename_module('queue', 'Queue') rename_module('winreg', '_winreg') +# Python 3 moved builtin intern() to sys package +# To make porting easier, make intern always live +# in sys package (for python 2.7.x) +try: + sys.intern +except AttributeError: + # We must be using python 2.7.x so monkey patch + # intern into the sys package + sys.intern = intern + + +# Preparing for 3.x. UserDict, UserList, UserString are in +# collections for 3.x, but standalone in 2.7.x +import collections try: - import subprocess -except ImportError: - # Pre-2.4 Python has no subprocess module. - import_as('_scons_subprocess', 'subprocess') + collections.UserDict +except AttributeError: + exec('from UserDict import UserDict as _UserDict') + collections.UserDict = _UserDict + del _UserDict try: - sys.intern + collections.UserList except AttributeError: - # Pre-2.6 Python has no sys.intern() function. - import builtins - try: - sys.intern = builtins.intern - except AttributeError: - # Pre-2.x Python has no builtin intern() function. - def intern(x): - return x - sys.intern = intern - del intern + exec('from UserList import UserList as _UserList') + collections.UserList = _UserList + del _UserList + try: - sys.maxsize + collections.UserString except AttributeError: - # Pre-2.6 Python has no sys.maxsize attribute - # Wrapping sys in () is silly, but protects it from 2to3 renames fixer - sys.maxsize = (sys).maxint - - -if os.environ.get('SCONS_HORRIBLE_REGRESSION_TEST_HACK') is not None: - # We can't apply the 'callable' fixer until the floor is 2.6, but the - # '-3' option to Python 2.6 and 2.7 generates almost ten thousand - # warnings. This hack allows us to run regression tests with the '-3' - # option by replacing the callable() built-in function with a hack - # that performs the same function but doesn't generate the warning. - # Note that this hack is ONLY intended to be used for regression - # testing, and should NEVER be used for real runs. - from types import ClassType - def callable(obj): - if hasattr(obj, '__call__'): return True - if isinstance(obj, (ClassType, type)): return True - return False - import builtins - builtins.callable = callable - del callable + exec('from UserString import UserString as _UserString') + collections.UserString = _UserString + del _UserString # Local Variables: |