From ebcd492d39cd0525b768a48558e50041aa0961e3 Mon Sep 17 00:00:00 2001 From: Parabola Date: Wed, 29 Dec 2010 21:39:18 +0000 Subject: Revert "Dammit." This reverts commit acf8c73de7e478804b5273fbdd2e7225f7976af9. --- .../setuptools/depends.py | 246 +++++++++++++++++++++ 1 file changed, 246 insertions(+) create mode 100755 lib/python2.7/site-packages/distribute-0.6.14-py2.7.egg/setuptools/depends.py (limited to 'lib/python2.7/site-packages/distribute-0.6.14-py2.7.egg/setuptools/depends.py') diff --git a/lib/python2.7/site-packages/distribute-0.6.14-py2.7.egg/setuptools/depends.py b/lib/python2.7/site-packages/distribute-0.6.14-py2.7.egg/setuptools/depends.py new file mode 100755 index 00000000..4b7b3437 --- /dev/null +++ b/lib/python2.7/site-packages/distribute-0.6.14-py2.7.egg/setuptools/depends.py @@ -0,0 +1,246 @@ +from __future__ import generators +import sys, imp, marshal +from imp import PKG_DIRECTORY, PY_COMPILED, PY_SOURCE, PY_FROZEN +from distutils.version import StrictVersion, LooseVersion + +__all__ = [ + 'Require', 'find_module', 'get_module_constant', 'extract_constant' +] + +class Require: + """A prerequisite to building or installing a distribution""" + + def __init__(self,name,requested_version,module,homepage='', + attribute=None,format=None + ): + + if format is None and requested_version is not None: + format = StrictVersion + + if format is not None: + requested_version = format(requested_version) + if attribute is None: + attribute = '__version__' + + self.__dict__.update(locals()) + del self.self + + + def full_name(self): + """Return full package/distribution name, w/version""" + if self.requested_version is not None: + return '%s-%s' % (self.name,self.requested_version) + return self.name + + + def version_ok(self,version): + """Is 'version' sufficiently up-to-date?""" + return self.attribute is None or self.format is None or \ + str(version)<>"unknown" and version >= self.requested_version + + + def get_version(self, paths=None, default="unknown"): + + """Get version number of installed module, 'None', or 'default' + + Search 'paths' for module. If not found, return 'None'. If found, + return the extracted version attribute, or 'default' if no version + attribute was specified, or the value cannot be determined without + importing the module. The version is formatted according to the + requirement's version format (if any), unless it is 'None' or the + supplied 'default'. + """ + + if self.attribute is None: + try: + f,p,i = find_module(self.module,paths) + if f: f.close() + return default + except ImportError: + return None + + v = get_module_constant(self.module,self.attribute,default,paths) + + if v is not None and v is not default and self.format is not None: + return self.format(v) + + return v + + + def is_present(self,paths=None): + """Return true if dependency is present on 'paths'""" + return self.get_version(paths) is not None + + + def is_current(self,paths=None): + """Return true if dependency is present and up-to-date on 'paths'""" + version = self.get_version(paths) + if version is None: + return False + return self.version_ok(version) + + +def _iter_code(code): + + """Yield '(op,arg)' pair for each operation in code object 'code'""" + + from array import array + from dis import HAVE_ARGUMENT, EXTENDED_ARG + + bytes = array('b',code.co_code) + eof = len(code.co_code) + + ptr = 0 + extended_arg = 0 + + while ptr=HAVE_ARGUMENT: + + arg = bytes[ptr+1] + bytes[ptr+2]*256 + extended_arg + ptr += 3 + + if op==EXTENDED_ARG: + extended_arg = arg * 65536L + continue + + else: + arg = None + ptr += 1 + + yield op,arg + + + + + + + + + + +def find_module(module, paths=None): + """Just like 'imp.find_module()', but with package support""" + + parts = module.split('.') + + while parts: + part = parts.pop(0) + f, path, (suffix,mode,kind) = info = imp.find_module(part, paths) + + if kind==PKG_DIRECTORY: + parts = parts or ['__init__'] + paths = [path] + + elif parts: + raise ImportError("Can't find %r in %s" % (parts,module)) + + return info + + + + + + + + + + + + + + + + + + + + + + + + +def get_module_constant(module, symbol, default=-1, paths=None): + + """Find 'module' by searching 'paths', and extract 'symbol' + + Return 'None' if 'module' does not exist on 'paths', or it does not define + 'symbol'. If the module defines 'symbol' as a constant, return the + constant. Otherwise, return 'default'.""" + + try: + f, path, (suffix,mode,kind) = find_module(module,paths) + except ImportError: + # Module doesn't exist + return None + + try: + if kind==PY_COMPILED: + f.read(8) # skip magic & date + code = marshal.load(f) + elif kind==PY_FROZEN: + code = imp.get_frozen_object(module) + elif kind==PY_SOURCE: + code = compile(f.read(), path, 'exec') + else: + # Not something we can parse; we'll have to import it. :( + if module not in sys.modules: + imp.load_module(module,f,path,(suffix,mode,kind)) + return getattr(sys.modules[module],symbol,None) + + finally: + if f: + f.close() + + return extract_constant(code,symbol,default) + + + + + + + + +def extract_constant(code,symbol,default=-1): + """Extract the constant value of 'symbol' from 'code' + + If the name 'symbol' is bound to a constant value by the Python code + object 'code', return that value. If 'symbol' is bound to an expression, + return 'default'. Otherwise, return 'None'. + + Return value is based on the first assignment to 'symbol'. 'symbol' must + be a global, or at least a non-"fast" local in the code block. That is, + only 'STORE_NAME' and 'STORE_GLOBAL' opcodes are checked, and 'symbol' + must be present in 'code.co_names'. + """ + + if symbol not in code.co_names: + # name's not there, can't possibly be an assigment + return None + + name_idx = list(code.co_names).index(symbol) + + STORE_NAME = 90 + STORE_GLOBAL = 97 + LOAD_CONST = 100 + + const = default + + for op, arg in _iter_code(code): + + if op==LOAD_CONST: + const = code.co_consts[arg] + elif arg==name_idx and (op==STORE_NAME or op==STORE_GLOBAL): + return const + else: + const = default + +if sys.platform.startswith('java') or sys.platform == 'cli': + # XXX it'd be better to test assertions about bytecode instead... + del extract_constant, get_module_constant + __all__.remove('extract_constant') + __all__.remove('get_module_constant') + + -- cgit v1.2.3-54-g00ecf