mirror of
https://github.com/tahoe-lafs/tahoe-lafs.git
synced 2024-12-27 00:21:07 +00:00
06a8b1ea84
Include the text of the offending distribution spec when it is ill-formed.
I got an error message from pkg_resources.py saying that a distribution spec
was ill-formed, because it ended with an '=' and nothing came after the '='.
However, the error message and stack trace didn't tell which distribution spec
it was.
With this patch, it includes the distribution spec itself in the error message.
There is no unit test of this patch, but I did test it manually by inserting a
"raise ValueError('WHATEVER')" into the code and re-running it and observing
that the new output correctly included the distribution
2657 lines
84 KiB
Python
2657 lines
84 KiB
Python
"""Package resource API
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--------------------
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A resource is a logical file contained within a package, or a logical
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subdirectory thereof. The package resource API expects resource names
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to have their path parts separated with ``/``, *not* whatever the local
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path separator is. Do not use os.path operations to manipulate resource
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names being passed into the API.
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The package resource API is designed to work with normal filesystem packages,
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.egg files, and unpacked .egg files. It can also work in a limited way with
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.zip files and with custom PEP 302 loaders that support the ``get_data()``
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method.
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"""
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import sys, os, zipimport, time, re, imp
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try:
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frozenset
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except NameError:
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from sets import ImmutableSet as frozenset
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# capture these to bypass sandboxing
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from os import utime, rename, unlink, mkdir
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from os import open as os_open
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from os.path import isdir, split
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def _bypass_ensure_directory(name, mode=0777):
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# Sandbox-bypassing version of ensure_directory()
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dirname, filename = split(name)
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if dirname and filename and not isdir(dirname):
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_bypass_ensure_directory(dirname)
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mkdir(dirname, mode)
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_state_vars = {}
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def _declare_state(vartype, **kw):
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g = globals()
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for name, val in kw.iteritems():
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g[name] = val
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_state_vars[name] = vartype
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def __getstate__():
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state = {}
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g = globals()
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for k, v in _state_vars.iteritems():
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state[k] = g['_sget_'+v](g[k])
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return state
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def __setstate__(state):
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g = globals()
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for k, v in state.iteritems():
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g['_sset_'+_state_vars[k]](k, g[k], v)
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return state
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def _sget_dict(val):
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return val.copy()
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def _sset_dict(key, ob, state):
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ob.clear()
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ob.update(state)
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def _sget_object(val):
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return val.__getstate__()
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def _sset_object(key, ob, state):
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ob.__setstate__(state)
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_sget_none = _sset_none = lambda *args: None
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def get_supported_platform():
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"""Return this platform's maximum compatible version.
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distutils.util.get_platform() normally reports the minimum version
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of Mac OS X that would be required to *use* extensions produced by
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distutils. But what we want when checking compatibility is to know the
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version of Mac OS X that we are *running*. To allow usage of packages that
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explicitly require a newer version of Mac OS X, we must also know the
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current version of the OS.
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If this condition occurs for any other platform with a version in its
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platform strings, this function should be extended accordingly.
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"""
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plat = get_build_platform(); m = macosVersionString.match(plat)
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if m is not None and sys.platform == "darwin":
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try:
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plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
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except ValueError:
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pass # not Mac OS X
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return plat
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__all__ = [
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# Basic resource access and distribution/entry point discovery
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'require', 'run_script', 'get_provider', 'get_distribution',
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'load_entry_point', 'get_entry_map', 'get_entry_info', 'iter_entry_points',
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'resource_string', 'resource_stream', 'resource_filename',
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'resource_listdir', 'resource_exists', 'resource_isdir',
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# Environmental control
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'declare_namespace', 'working_set', 'add_activation_listener',
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'find_distributions', 'set_extraction_path', 'cleanup_resources',
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'get_default_cache',
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# Primary implementation classes
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'Environment', 'WorkingSet', 'ResourceManager',
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'Distribution', 'Requirement', 'EntryPoint',
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# Exceptions
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'ResolutionError','VersionConflict','DistributionNotFound','UnknownExtra',
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'ExtractionError',
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# Parsing functions and string utilities
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'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
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'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
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'safe_extra', 'to_filename',
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# filesystem utilities
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'ensure_directory', 'normalize_path',
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# Distribution "precedence" constants
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'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
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# "Provider" interfaces, implementations, and registration/lookup APIs
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'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
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'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
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'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
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'register_finder', 'register_namespace_handler', 'register_loader_type',
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'fixup_namespace_packages', 'get_importer',
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# Deprecated/backward compatibility only
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'run_main', 'AvailableDistributions',
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]
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class ResolutionError(Exception):
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"""Abstract base for dependency resolution errors"""
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def __repr__(self):
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return self.__class__.__name__+repr(self.args)
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class VersionConflict(ResolutionError):
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"""An already-installed version conflicts with the requested version"""
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class DistributionNotFound(ResolutionError):
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"""A requested distribution was not found"""
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class UnknownExtra(ResolutionError):
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"""Distribution doesn't have an "extra feature" of the given name"""
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_provider_factories = {}
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PY_MAJOR = sys.version[:3]
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EGG_DIST = 3
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BINARY_DIST = 2
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SOURCE_DIST = 1
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CHECKOUT_DIST = 0
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DEVELOP_DIST = -1
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def register_loader_type(loader_type, provider_factory):
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"""Register `provider_factory` to make providers for `loader_type`
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`loader_type` is the type or class of a PEP 302 ``module.__loader__``,
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and `provider_factory` is a function that, passed a *module* object,
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returns an ``IResourceProvider`` for that module.
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"""
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_provider_factories[loader_type] = provider_factory
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def get_provider(moduleOrReq):
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"""Return an IResourceProvider for the named module or requirement"""
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if isinstance(moduleOrReq,Requirement):
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return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
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try:
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module = sys.modules[moduleOrReq]
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except KeyError:
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__import__(moduleOrReq)
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module = sys.modules[moduleOrReq]
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loader = getattr(module, '__loader__', None)
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return _find_adapter(_provider_factories, loader)(module)
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def _macosx_vers(_cache=[]):
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if not _cache:
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from platform import mac_ver
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_cache.append(mac_ver()[0].split('.'))
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return _cache[0]
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def _macosx_arch(machine):
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return {'PowerPC':'ppc', 'Power_Macintosh':'ppc'}.get(machine,machine)
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def get_build_platform():
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"""Return this platform's string for platform-specific distributions
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XXX Currently this is the same as ``distutils.util.get_platform()``, but it
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needs some hacks for Linux and Mac OS X.
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"""
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from distutils.util import get_platform
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plat = get_platform()
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if sys.platform == "darwin" and not plat.startswith('macosx-'):
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try:
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version = _macosx_vers()
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machine = os.uname()[4].replace(" ", "_")
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return "macosx-%d.%d-%s" % (int(version[0]), int(version[1]),
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_macosx_arch(machine))
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except ValueError:
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# if someone is running a non-Mac darwin system, this will fall
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# through to the default implementation
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pass
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return plat
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macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
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darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
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get_platform = get_build_platform # XXX backward compat
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def compatible_platforms(provided,required):
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"""Can code for the `provided` platform run on the `required` platform?
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Returns true if either platform is ``None``, or the platforms are equal.
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XXX Needs compatibility checks for Linux and other unixy OSes.
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"""
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if provided is None or required is None or provided==required:
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return True # easy case
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# Mac OS X special cases
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reqMac = macosVersionString.match(required)
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if reqMac:
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provMac = macosVersionString.match(provided)
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# is this a Mac package?
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if not provMac:
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# this is backwards compatibility for packages built before
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# setuptools 0.6. All packages built after this point will
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# use the new macosx designation.
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provDarwin = darwinVersionString.match(provided)
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if provDarwin:
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dversion = int(provDarwin.group(1))
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macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
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if dversion == 7 and macosversion >= "10.3" or \
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dversion == 8 and macosversion >= "10.4":
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#import warnings
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#warnings.warn("Mac eggs should be rebuilt to "
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# "use the macosx designation instead of darwin.",
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# category=DeprecationWarning)
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return True
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return False # egg isn't macosx or legacy darwin
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# are they the same major version and machine type?
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if provMac.group(1) != reqMac.group(1) or \
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provMac.group(3) != reqMac.group(3):
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return False
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# is the required OS major update >= the provided one?
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if int(provMac.group(2)) > int(reqMac.group(2)):
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return False
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return True
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# XXX Linux and other platforms' special cases should go here
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return False
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def run_script(dist_spec, script_name):
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"""Locate distribution `dist_spec` and run its `script_name` script"""
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ns = sys._getframe(1).f_globals
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name = ns['__name__']
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ns.clear()
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ns['__name__'] = name
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require(dist_spec)[0].run_script(script_name, ns)
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run_main = run_script # backward compatibility
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def get_distribution(dist):
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"""Return a current distribution object for a Requirement or string"""
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if isinstance(dist,basestring): dist = Requirement.parse(dist)
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if isinstance(dist,Requirement): dist = get_provider(dist)
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if not isinstance(dist,Distribution):
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raise TypeError("Expected string, Requirement, or Distribution", dist)
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return dist
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def load_entry_point(dist, group, name):
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"""Return `name` entry point of `group` for `dist` or raise ImportError"""
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return get_distribution(dist).load_entry_point(group, name)
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def get_entry_map(dist, group=None):
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"""Return the entry point map for `group`, or the full entry map"""
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return get_distribution(dist).get_entry_map(group)
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def get_entry_info(dist, group, name):
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"""Return the EntryPoint object for `group`+`name`, or ``None``"""
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return get_distribution(dist).get_entry_info(group, name)
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class IMetadataProvider:
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def has_metadata(name):
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"""Does the package's distribution contain the named metadata?"""
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def get_metadata(name):
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"""The named metadata resource as a string"""
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def get_metadata_lines(name):
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"""Yield named metadata resource as list of non-blank non-comment lines
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Leading and trailing whitespace is stripped from each line, and lines
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with ``#`` as the first non-blank character are omitted."""
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def metadata_isdir(name):
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"""Is the named metadata a directory? (like ``os.path.isdir()``)"""
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def metadata_listdir(name):
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"""List of metadata names in the directory (like ``os.listdir()``)"""
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def run_script(script_name, namespace):
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"""Execute the named script in the supplied namespace dictionary"""
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class IResourceProvider(IMetadataProvider):
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"""An object that provides access to package resources"""
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def get_resource_filename(manager, resource_name):
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"""Return a true filesystem path for `resource_name`
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`manager` must be an ``IResourceManager``"""
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def get_resource_stream(manager, resource_name):
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"""Return a readable file-like object for `resource_name`
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`manager` must be an ``IResourceManager``"""
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def get_resource_string(manager, resource_name):
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"""Return a string containing the contents of `resource_name`
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`manager` must be an ``IResourceManager``"""
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def has_resource(resource_name):
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"""Does the package contain the named resource?"""
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def resource_isdir(resource_name):
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"""Is the named resource a directory? (like ``os.path.isdir()``)"""
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def resource_listdir(resource_name):
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"""List of resource names in the directory (like ``os.listdir()``)"""
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class WorkingSet(object):
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"""A collection of active distributions on sys.path (or a similar list)"""
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def __init__(self, entries=None):
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"""Create working set from list of path entries (default=sys.path)"""
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self.entries = []
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self.entry_keys = {}
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self.by_key = {}
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self.callbacks = []
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if entries is None:
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entries = sys.path
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for entry in entries:
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self.add_entry(entry)
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def add_entry(self, entry):
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"""Add a path item to ``.entries``, finding any distributions on it
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``find_distributions(entry, True)`` is used to find distributions
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corresponding to the path entry, and they are added. `entry` is
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always appended to ``.entries``, even if it is already present.
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(This is because ``sys.path`` can contain the same value more than
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once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
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equal ``sys.path``.)
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"""
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self.entry_keys.setdefault(entry, [])
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self.entries.append(entry)
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for dist in find_distributions(entry, True):
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self.add(dist, entry, False)
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def __contains__(self,dist):
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"""True if `dist` is the active distribution for its project"""
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return self.by_key.get(dist.key) == dist
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def find(self, req):
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"""Find a distribution matching requirement `req`
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If there is an active distribution for the requested project, this
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returns it as long as it meets the version requirement specified by
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`req`. But, if there is an active distribution for the project and it
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does *not* meet the `req` requirement, ``VersionConflict`` is raised.
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If there is no active distribution for the requested project, ``None``
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is returned.
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"""
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dist = self.by_key.get(req.key)
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if dist is not None and dist not in req:
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raise VersionConflict(dist,req) # XXX add more info
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else:
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return dist
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def iter_entry_points(self, group, name=None):
|
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"""Yield entry point objects from `group` matching `name`
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If `name` is None, yields all entry points in `group` from all
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distributions in the working set, otherwise only ones matching
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both `group` and `name` are yielded (in distribution order).
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"""
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for dist in self:
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entries = dist.get_entry_map(group)
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if name is None:
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for ep in entries.values():
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yield ep
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elif name in entries:
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yield entries[name]
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def run_script(self, requires, script_name):
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"""Locate distribution for `requires` and run `script_name` script"""
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ns = sys._getframe(1).f_globals
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name = ns['__name__']
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ns.clear()
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ns['__name__'] = name
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self.require(requires)[0].run_script(script_name, ns)
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def __iter__(self):
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"""Yield distributions for non-duplicate projects in the working set
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The yield order is the order in which the items' path entries were
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added to the working set.
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"""
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seen = {}
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for item in self.entries:
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for key in self.entry_keys[item]:
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if key not in seen:
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seen[key]=1
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yield self.by_key[key]
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def add(self, dist, entry=None, insert=True):
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"""Add `dist` to working set, associated with `entry`
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If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
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On exit from this routine, `entry` is added to the end of the working
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set's ``.entries`` (if it wasn't already present).
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`dist` is only added to the working set if it's for a project that
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doesn't already have a distribution in the set. If it's added, any
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callbacks registered with the ``subscribe()`` method will be called.
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"""
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if insert:
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dist.insert_on(self.entries, entry)
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if entry is None:
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entry = dist.location
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keys = self.entry_keys.setdefault(entry,[])
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keys2 = self.entry_keys.setdefault(dist.location,[])
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if dist.key in self.by_key:
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return # ignore hidden distros
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# If we have a __requires__ then we can already tell if this
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# dist is unsatisfactory, in which case we won't add it.
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|
if __requires__ is not None:
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|
for thisreqstr in __requires__:
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|
try:
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|
for thisreq in parse_requirements(thisreqstr):
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|
if thisreq.key == dist.key:
|
|
if dist not in thisreq:
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|
return
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|
except ValueError, e:
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|
e.args = tuple(e.args + ({'thisreqstr': thisreqstr},))
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raise
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|
|
self.by_key[dist.key] = dist
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|
if dist.key not in keys:
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keys.append(dist.key)
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|
if dist.key not in keys2:
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keys2.append(dist.key)
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|
self._added_new(dist)
|
|
|
|
def resolve(self, requirements, env=None, installer=None):
|
|
"""List all distributions needed to (recursively) meet `requirements`
|
|
|
|
`requirements` must be a sequence of ``Requirement`` objects. `env`,
|
|
if supplied, should be an ``Environment`` instance. If
|
|
not supplied, it defaults to all distributions available within any
|
|
entry or distribution in the working set. `installer`, if supplied,
|
|
will be invoked with each requirement that cannot be met by an
|
|
already-installed distribution; it should return a ``Distribution`` or
|
|
``None``.
|
|
"""
|
|
|
|
requirements = list(requirements)[::-1] # set up the stack
|
|
processed = {} # set of processed requirements
|
|
best = {} # key -> dist
|
|
to_activate = []
|
|
|
|
while requirements:
|
|
req = requirements.pop(0) # process dependencies breadth-first
|
|
if req in processed:
|
|
# Ignore cyclic or redundant dependencies
|
|
continue
|
|
dist = best.get(req.key)
|
|
if dist is None:
|
|
# Find the best distribution and add it to the map
|
|
dist = self.by_key.get(req.key)
|
|
if dist is None:
|
|
if env is None:
|
|
env = Environment(self.entries)
|
|
dist = best[req.key] = env.best_match(req, self, installer)
|
|
if dist is None:
|
|
raise DistributionNotFound(req) # XXX put more info here
|
|
to_activate.append(dist)
|
|
if dist not in req:
|
|
# Oops, the "best" so far conflicts with a dependency
|
|
raise VersionConflict(dist,req) # XXX put more info here
|
|
requirements.extend(dist.requires(req.extras)[::-1])
|
|
processed[req] = True
|
|
|
|
return to_activate # return list of distros to activate
|
|
|
|
def find_plugins(self,
|
|
plugin_env, full_env=None, installer=None, fallback=True
|
|
):
|
|
"""Find all activatable distributions in `plugin_env`
|
|
|
|
Example usage::
|
|
|
|
distributions, errors = working_set.find_plugins(
|
|
Environment(plugin_dirlist)
|
|
)
|
|
map(working_set.add, distributions) # add plugins+libs to sys.path
|
|
print "Couldn't load", errors # display errors
|
|
|
|
The `plugin_env` should be an ``Environment`` instance that contains
|
|
only distributions that are in the project's "plugin directory" or
|
|
directories. The `full_env`, if supplied, should be an ``Environment``
|
|
contains all currently-available distributions. If `full_env` is not
|
|
supplied, one is created automatically from the ``WorkingSet`` this
|
|
method is called on, which will typically mean that every directory on
|
|
``sys.path`` will be scanned for distributions.
|
|
|
|
`installer` is a standard installer callback as used by the
|
|
``resolve()`` method. The `fallback` flag indicates whether we should
|
|
attempt to resolve older versions of a plugin if the newest version
|
|
cannot be resolved.
|
|
|
|
This method returns a 2-tuple: (`distributions`, `error_info`), where
|
|
`distributions` is a list of the distributions found in `plugin_env`
|
|
that were loadable, along with any other distributions that are needed
|
|
to resolve their dependencies. `error_info` is a dictionary mapping
|
|
unloadable plugin distributions to an exception instance describing the
|
|
error that occurred. Usually this will be a ``DistributionNotFound`` or
|
|
``VersionConflict`` instance.
|
|
"""
|
|
|
|
plugin_projects = list(plugin_env)
|
|
plugin_projects.sort() # scan project names in alphabetic order
|
|
|
|
error_info = {}
|
|
distributions = {}
|
|
|
|
if full_env is None:
|
|
env = Environment(self.entries)
|
|
env += plugin_env
|
|
else:
|
|
env = full_env + plugin_env
|
|
|
|
shadow_set = self.__class__([])
|
|
map(shadow_set.add, self) # put all our entries in shadow_set
|
|
|
|
for project_name in plugin_projects:
|
|
|
|
for dist in plugin_env[project_name]:
|
|
|
|
req = [dist.as_requirement()]
|
|
|
|
try:
|
|
resolvees = shadow_set.resolve(req, env, installer)
|
|
|
|
except ResolutionError,v:
|
|
error_info[dist] = v # save error info
|
|
if fallback:
|
|
continue # try the next older version of project
|
|
else:
|
|
break # give up on this project, keep going
|
|
|
|
else:
|
|
map(shadow_set.add, resolvees)
|
|
distributions.update(dict.fromkeys(resolvees))
|
|
|
|
# success, no need to try any more versions of this project
|
|
break
|
|
|
|
distributions = list(distributions)
|
|
distributions.sort()
|
|
|
|
return distributions, error_info
|
|
|
|
|
|
|
|
|
|
|
|
def require(self, *requirements):
|
|
"""Ensure that distributions matching `requirements` are activated
|
|
|
|
`requirements` must be a string or a (possibly-nested) sequence
|
|
thereof, specifying the distributions and versions required. The
|
|
return value is a sequence of the distributions that needed to be
|
|
activated to fulfill the requirements; all relevant distributions are
|
|
included, even if they were already activated in this working set.
|
|
"""
|
|
needed = self.resolve(parse_requirements(requirements))
|
|
|
|
for dist in needed:
|
|
self.add(dist)
|
|
|
|
return needed
|
|
|
|
def subscribe(self, callback):
|
|
"""Invoke `callback` for all distributions (including existing ones)"""
|
|
if callback in self.callbacks:
|
|
return
|
|
self.callbacks.append(callback)
|
|
for dist in self:
|
|
callback(dist)
|
|
|
|
def _added_new(self, dist):
|
|
for callback in self.callbacks:
|
|
callback(dist)
|
|
|
|
def __getstate__(self):
|
|
return (
|
|
self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
|
|
self.callbacks[:]
|
|
)
|
|
|
|
def __setstate__(self, (entries, keys, by_key, callbacks)):
|
|
self.entries = entries[:]
|
|
self.entry_keys = keys.copy()
|
|
self.by_key = by_key.copy()
|
|
self.callbacks = callbacks[:]
|
|
|
|
|
|
class Environment(object):
|
|
"""Searchable snapshot of distributions on a search path"""
|
|
|
|
def __init__(self, search_path=None, platform=get_supported_platform(), python=PY_MAJOR):
|
|
"""Snapshot distributions available on a search path
|
|
|
|
Any distributions found on `search_path` are added to the environment.
|
|
`search_path` should be a sequence of ``sys.path`` items. If not
|
|
supplied, ``sys.path`` is used.
|
|
|
|
`platform` is an optional string specifying the name of the platform
|
|
that platform-specific distributions must be compatible with. If
|
|
unspecified, it defaults to the current platform. `python` is an
|
|
optional string naming the desired version of Python (e.g. ``'2.4'``);
|
|
it defaults to the current version.
|
|
|
|
You may explicitly set `platform` (and/or `python`) to ``None`` if you
|
|
wish to map *all* distributions, not just those compatible with the
|
|
running platform or Python version.
|
|
"""
|
|
self._distmap = {}
|
|
self._cache = {}
|
|
self.platform = platform
|
|
self.python = python
|
|
self.scan(search_path)
|
|
|
|
def can_add(self, dist):
|
|
"""Is distribution `dist` acceptable for this environment?
|
|
|
|
The distribution must match the platform and python version
|
|
requirements specified when this environment was created, or False
|
|
is returned.
|
|
"""
|
|
return (self.python is None or dist.py_version is None
|
|
or dist.py_version==self.python) \
|
|
and compatible_platforms(dist.platform,self.platform)
|
|
|
|
def remove(self, dist):
|
|
"""Remove `dist` from the environment"""
|
|
self._distmap[dist.key].remove(dist)
|
|
|
|
def scan(self, search_path=None):
|
|
"""Scan `search_path` for distributions usable in this environment
|
|
|
|
Any distributions found are added to the environment.
|
|
`search_path` should be a sequence of ``sys.path`` items. If not
|
|
supplied, ``sys.path`` is used. Only distributions conforming to
|
|
the platform/python version defined at initialization are added.
|
|
"""
|
|
if search_path is None:
|
|
search_path = sys.path
|
|
|
|
for item in search_path:
|
|
for dist in find_distributions(item):
|
|
self.add(dist)
|
|
|
|
def __getitem__(self,project_name):
|
|
"""Return a newest-to-oldest list of distributions for `project_name`
|
|
"""
|
|
try:
|
|
return self._cache[project_name]
|
|
except KeyError:
|
|
project_name = project_name.lower()
|
|
if project_name not in self._distmap:
|
|
return []
|
|
|
|
if project_name not in self._cache:
|
|
dists = self._cache[project_name] = self._distmap[project_name]
|
|
_sort_dists(dists)
|
|
|
|
return self._cache[project_name]
|
|
|
|
def add(self,dist):
|
|
"""Add `dist` if we ``can_add()`` it and it isn't already added"""
|
|
if self.can_add(dist) and dist.has_version():
|
|
dists = self._distmap.setdefault(dist.key,[])
|
|
if dist not in dists:
|
|
dists.append(dist)
|
|
if dist.key in self._cache:
|
|
_sort_dists(self._cache[dist.key])
|
|
|
|
|
|
def best_match(self, req, working_set, installer=None):
|
|
"""Find distribution best matching `req` and usable on `working_set`
|
|
|
|
This calls the ``find(req)`` method of the `working_set` to see if a
|
|
suitable distribution is already active. (This may raise
|
|
``VersionConflict`` if an unsuitable version of the project is already
|
|
active in the specified `working_set`.)
|
|
|
|
If a suitable distribution isn't active, this method returns the
|
|
newest platform-dependent distribution in the environment that meets
|
|
the ``Requirement`` in `req`. If no suitable platform-dependent
|
|
distribution is found, then the newest platform-independent
|
|
distribution that meets the requirement is returned. (A platform-
|
|
dependent distribution will typically have code compiled or
|
|
specialized for that platform.)
|
|
|
|
Otherwise, if `installer` is supplied, then the result of calling the
|
|
environment's ``obtain(req, installer)`` method will be returned.
|
|
"""
|
|
dist = working_set.find(req)
|
|
if dist is not None:
|
|
return dist
|
|
|
|
# first try to find a platform-dependent dist
|
|
for dist in self[req.key]:
|
|
if dist in req and dist.platform is not None:
|
|
return dist
|
|
|
|
# then try any other dist
|
|
for dist in self[req.key]:
|
|
if dist in req:
|
|
return dist
|
|
|
|
return self.obtain(req, installer) # try and download/install
|
|
|
|
def obtain(self, requirement, installer=None):
|
|
"""Obtain a distribution matching `requirement` (e.g. via download)
|
|
|
|
Obtain a distro that matches requirement (e.g. via download). In the
|
|
base ``Environment`` class, this routine just returns
|
|
``installer(requirement)``, unless `installer` is None, in which case
|
|
None is returned instead. This method is a hook that allows subclasses
|
|
to attempt other ways of obtaining a distribution before falling back
|
|
to the `installer` argument."""
|
|
if installer is not None:
|
|
return installer(requirement)
|
|
|
|
def __iter__(self):
|
|
"""Yield the unique project names of the available distributions"""
|
|
for key in self._distmap.keys():
|
|
if self[key]: yield key
|
|
|
|
|
|
|
|
|
|
def __iadd__(self, other):
|
|
"""In-place addition of a distribution or environment"""
|
|
if isinstance(other,Distribution):
|
|
self.add(other)
|
|
elif isinstance(other,Environment):
|
|
for project in other:
|
|
for dist in other[project]:
|
|
self.add(dist)
|
|
else:
|
|
raise TypeError("Can't add %r to environment" % (other,))
|
|
return self
|
|
|
|
def __add__(self, other):
|
|
"""Add an environment or distribution to an environment"""
|
|
new = self.__class__([], platform=None, python=None)
|
|
for env in self, other:
|
|
new += env
|
|
return new
|
|
|
|
|
|
AvailableDistributions = Environment # XXX backward compatibility
|
|
|
|
|
|
class ExtractionError(RuntimeError):
|
|
"""An error occurred extracting a resource
|
|
|
|
The following attributes are available from instances of this exception:
|
|
|
|
manager
|
|
The resource manager that raised this exception
|
|
|
|
cache_path
|
|
The base directory for resource extraction
|
|
|
|
original_error
|
|
The exception instance that caused extraction to fail
|
|
"""
|
|
|
|
|
|
|
|
|
|
class ResourceManager:
|
|
"""Manage resource extraction and packages"""
|
|
extraction_path = None
|
|
|
|
def __init__(self):
|
|
self.cached_files = {}
|
|
|
|
def resource_exists(self, package_or_requirement, resource_name):
|
|
"""Does the named resource exist?"""
|
|
return get_provider(package_or_requirement).has_resource(resource_name)
|
|
|
|
def resource_isdir(self, package_or_requirement, resource_name):
|
|
"""Is the named resource an existing directory?"""
|
|
return get_provider(package_or_requirement).resource_isdir(
|
|
resource_name
|
|
)
|
|
|
|
def resource_filename(self, package_or_requirement, resource_name):
|
|
"""Return a true filesystem path for specified resource"""
|
|
return get_provider(package_or_requirement).get_resource_filename(
|
|
self, resource_name
|
|
)
|
|
|
|
def resource_stream(self, package_or_requirement, resource_name):
|
|
"""Return a readable file-like object for specified resource"""
|
|
return get_provider(package_or_requirement).get_resource_stream(
|
|
self, resource_name
|
|
)
|
|
|
|
def resource_string(self, package_or_requirement, resource_name):
|
|
"""Return specified resource as a string"""
|
|
return get_provider(package_or_requirement).get_resource_string(
|
|
self, resource_name
|
|
)
|
|
|
|
def resource_listdir(self, package_or_requirement, resource_name):
|
|
"""List the contents of the named resource directory"""
|
|
return get_provider(package_or_requirement).resource_listdir(
|
|
resource_name
|
|
)
|
|
|
|
def extraction_error(self):
|
|
"""Give an error message for problems extracting file(s)"""
|
|
|
|
old_exc = sys.exc_info()[1]
|
|
cache_path = self.extraction_path or get_default_cache()
|
|
|
|
err = ExtractionError("""Can't extract file(s) to egg cache
|
|
|
|
The following error occurred while trying to extract file(s) to the Python egg
|
|
cache:
|
|
|
|
%s
|
|
|
|
The Python egg cache directory is currently set to:
|
|
|
|
%s
|
|
|
|
Perhaps your account does not have write access to this directory? You can
|
|
change the cache directory by setting the PYTHON_EGG_CACHE environment
|
|
variable to point to an accessible directory.
|
|
""" % (old_exc, cache_path)
|
|
)
|
|
err.manager = self
|
|
err.cache_path = cache_path
|
|
err.original_error = old_exc
|
|
raise err
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def get_cache_path(self, archive_name, names=()):
|
|
"""Return absolute location in cache for `archive_name` and `names`
|
|
|
|
The parent directory of the resulting path will be created if it does
|
|
not already exist. `archive_name` should be the base filename of the
|
|
enclosing egg (which may not be the name of the enclosing zipfile!),
|
|
including its ".egg" extension. `names`, if provided, should be a
|
|
sequence of path name parts "under" the egg's extraction location.
|
|
|
|
This method should only be called by resource providers that need to
|
|
obtain an extraction location, and only for names they intend to
|
|
extract, as it tracks the generated names for possible cleanup later.
|
|
"""
|
|
extract_path = self.extraction_path or get_default_cache()
|
|
target_path = os.path.join(extract_path, archive_name+'-tmp', *names)
|
|
try:
|
|
_bypass_ensure_directory(target_path)
|
|
except:
|
|
self.extraction_error()
|
|
|
|
self.cached_files[target_path] = 1
|
|
return target_path
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def postprocess(self, tempname, filename):
|
|
"""Perform any platform-specific postprocessing of `tempname`
|
|
|
|
This is where Mac header rewrites should be done; other platforms don't
|
|
have anything special they should do.
|
|
|
|
Resource providers should call this method ONLY after successfully
|
|
extracting a compressed resource. They must NOT call it on resources
|
|
that are already in the filesystem.
|
|
|
|
`tempname` is the current (temporary) name of the file, and `filename`
|
|
is the name it will be renamed to by the caller after this routine
|
|
returns.
|
|
"""
|
|
|
|
if os.name == 'posix':
|
|
# Make the resource executable
|
|
mode = ((os.stat(tempname).st_mode) | 0555) & 07777
|
|
os.chmod(tempname, mode)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def set_extraction_path(self, path):
|
|
"""Set the base path where resources will be extracted to, if needed.
|
|
|
|
If you do not call this routine before any extractions take place, the
|
|
path defaults to the return value of ``get_default_cache()``. (Which
|
|
is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
|
|
platform-specific fallbacks. See that routine's documentation for more
|
|
details.)
|
|
|
|
Resources are extracted to subdirectories of this path based upon
|
|
information given by the ``IResourceProvider``. You may set this to a
|
|
temporary directory, but then you must call ``cleanup_resources()`` to
|
|
delete the extracted files when done. There is no guarantee that
|
|
``cleanup_resources()`` will be able to remove all extracted files.
|
|
|
|
(Note: you may not change the extraction path for a given resource
|
|
manager once resources have been extracted, unless you first call
|
|
``cleanup_resources()``.)
|
|
"""
|
|
if self.cached_files:
|
|
raise ValueError(
|
|
"Can't change extraction path, files already extracted"
|
|
)
|
|
|
|
self.extraction_path = path
|
|
|
|
def cleanup_resources(self, force=False):
|
|
"""
|
|
Delete all extracted resource files and directories, returning a list
|
|
of the file and directory names that could not be successfully removed.
|
|
This function does not have any concurrency protection, so it should
|
|
generally only be called when the extraction path is a temporary
|
|
directory exclusive to a single process. This method is not
|
|
automatically called; you must call it explicitly or register it as an
|
|
``atexit`` function if you wish to ensure cleanup of a temporary
|
|
directory used for extractions.
|
|
"""
|
|
# XXX
|
|
|
|
|
|
|
|
def get_default_cache():
|
|
"""Determine the default cache location
|
|
|
|
This returns the ``PYTHON_EGG_CACHE`` environment variable, if set.
|
|
Otherwise, on Windows, it returns a "Python-Eggs" subdirectory of the
|
|
"Application Data" directory. On all other systems, it's "~/.python-eggs".
|
|
"""
|
|
try:
|
|
return os.environ['PYTHON_EGG_CACHE']
|
|
except KeyError:
|
|
pass
|
|
|
|
if os.name!='nt':
|
|
return os.path.expanduser('~/.python-eggs')
|
|
|
|
app_data = 'Application Data' # XXX this may be locale-specific!
|
|
app_homes = [
|
|
(('APPDATA',), None), # best option, should be locale-safe
|
|
(('USERPROFILE',), app_data),
|
|
(('HOMEDRIVE','HOMEPATH'), app_data),
|
|
(('HOMEPATH',), app_data),
|
|
(('HOME',), None),
|
|
(('WINDIR',), app_data), # 95/98/ME
|
|
]
|
|
|
|
for keys, subdir in app_homes:
|
|
dirname = ''
|
|
for key in keys:
|
|
if key in os.environ:
|
|
dirname = os.path.join(dirname, os.environ[key])
|
|
else:
|
|
break
|
|
else:
|
|
if subdir:
|
|
dirname = os.path.join(dirname,subdir)
|
|
return os.path.join(dirname, 'Python-Eggs')
|
|
else:
|
|
raise RuntimeError(
|
|
"Please set the PYTHON_EGG_CACHE enviroment variable"
|
|
)
|
|
|
|
def safe_name(name):
|
|
"""Convert an arbitrary string to a standard distribution name
|
|
|
|
Any runs of non-alphanumeric/. characters are replaced with a single '-'.
|
|
"""
|
|
return re.sub('[^A-Za-z0-9.]+', '-', name)
|
|
|
|
|
|
def safe_version(version):
|
|
"""Convert an arbitrary string to a standard version string
|
|
|
|
Spaces become dots, and all other non-alphanumeric characters become
|
|
dashes, with runs of multiple dashes condensed to a single dash.
|
|
"""
|
|
version = version.replace(' ','.')
|
|
return re.sub('[^A-Za-z0-9.]+', '-', version)
|
|
|
|
|
|
def safe_extra(extra):
|
|
"""Convert an arbitrary string to a standard 'extra' name
|
|
|
|
Any runs of non-alphanumeric characters are replaced with a single '_',
|
|
and the result is always lowercased.
|
|
"""
|
|
return re.sub('[^A-Za-z0-9.]+', '_', extra).lower()
|
|
|
|
|
|
def to_filename(name):
|
|
"""Convert a project or version name to its filename-escaped form
|
|
|
|
Any '-' characters are currently replaced with '_'.
|
|
"""
|
|
return name.replace('-','_')
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class NullProvider:
|
|
"""Try to implement resources and metadata for arbitrary PEP 302 loaders"""
|
|
|
|
egg_name = None
|
|
egg_info = None
|
|
loader = None
|
|
|
|
def __init__(self, module):
|
|
self.loader = getattr(module, '__loader__', None)
|
|
self.module_path = os.path.dirname(getattr(module, '__file__', ''))
|
|
|
|
def get_resource_filename(self, manager, resource_name):
|
|
return self._fn(self.module_path, resource_name)
|
|
|
|
def get_resource_stream(self, manager, resource_name):
|
|
return StringIO(self.get_resource_string(manager, resource_name))
|
|
|
|
def get_resource_string(self, manager, resource_name):
|
|
return self._get(self._fn(self.module_path, resource_name))
|
|
|
|
def has_resource(self, resource_name):
|
|
return self._has(self._fn(self.module_path, resource_name))
|
|
|
|
def has_metadata(self, name):
|
|
return self.egg_info and self._has(self._fn(self.egg_info,name))
|
|
|
|
def get_metadata(self, name):
|
|
if not self.egg_info:
|
|
return ""
|
|
return self._get(self._fn(self.egg_info,name))
|
|
|
|
def get_metadata_lines(self, name):
|
|
return yield_lines(self.get_metadata(name))
|
|
|
|
def resource_isdir(self,resource_name):
|
|
return self._isdir(self._fn(self.module_path, resource_name))
|
|
|
|
def metadata_isdir(self,name):
|
|
return self.egg_info and self._isdir(self._fn(self.egg_info,name))
|
|
|
|
|
|
def resource_listdir(self,resource_name):
|
|
return self._listdir(self._fn(self.module_path,resource_name))
|
|
|
|
def metadata_listdir(self,name):
|
|
if self.egg_info:
|
|
return self._listdir(self._fn(self.egg_info,name))
|
|
return []
|
|
|
|
def run_script(self,script_name,namespace):
|
|
script = 'scripts/'+script_name
|
|
if not self.has_metadata(script):
|
|
raise ResolutionError("No script named %r" % script_name)
|
|
script_text = self.get_metadata(script).replace('\r\n','\n')
|
|
script_text = script_text.replace('\r','\n')
|
|
script_filename = self._fn(self.egg_info,script)
|
|
namespace['__file__'] = script_filename
|
|
if os.path.exists(script_filename):
|
|
execfile(script_filename, namespace, namespace)
|
|
else:
|
|
from linecache import cache
|
|
cache[script_filename] = (
|
|
len(script_text), 0, script_text.split('\n'), script_filename
|
|
)
|
|
script_code = compile(script_text,script_filename,'exec')
|
|
exec script_code in namespace, namespace
|
|
|
|
def _has(self, path):
|
|
raise NotImplementedError(
|
|
"Can't perform this operation for unregistered loader type"
|
|
)
|
|
|
|
def _isdir(self, path):
|
|
raise NotImplementedError(
|
|
"Can't perform this operation for unregistered loader type"
|
|
)
|
|
|
|
def _listdir(self, path):
|
|
raise NotImplementedError(
|
|
"Can't perform this operation for unregistered loader type"
|
|
)
|
|
|
|
def _fn(self, base, resource_name):
|
|
if resource_name:
|
|
return os.path.join(base, *resource_name.split('/'))
|
|
return base
|
|
|
|
def _get(self, path):
|
|
if hasattr(self.loader, 'get_data'):
|
|
return self.loader.get_data(path)
|
|
raise NotImplementedError(
|
|
"Can't perform this operation for loaders without 'get_data()'"
|
|
)
|
|
|
|
register_loader_type(object, NullProvider)
|
|
|
|
|
|
class EggProvider(NullProvider):
|
|
"""Provider based on a virtual filesystem"""
|
|
|
|
def __init__(self,module):
|
|
NullProvider.__init__(self,module)
|
|
self._setup_prefix()
|
|
|
|
def _setup_prefix(self):
|
|
# we assume here that our metadata may be nested inside a "basket"
|
|
# of multiple eggs; that's why we use module_path instead of .archive
|
|
path = self.module_path
|
|
old = None
|
|
while path!=old:
|
|
if path.lower().endswith('.egg'):
|
|
self.egg_name = os.path.basename(path)
|
|
self.egg_info = os.path.join(path, 'EGG-INFO')
|
|
self.egg_root = path
|
|
break
|
|
old = path
|
|
path, base = os.path.split(path)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class DefaultProvider(EggProvider):
|
|
"""Provides access to package resources in the filesystem"""
|
|
|
|
def _has(self, path):
|
|
return os.path.exists(path)
|
|
|
|
def _isdir(self,path):
|
|
return os.path.isdir(path)
|
|
|
|
def _listdir(self,path):
|
|
return os.listdir(path)
|
|
|
|
def get_resource_stream(self, manager, resource_name):
|
|
return open(self._fn(self.module_path, resource_name), 'rb')
|
|
|
|
def _get(self, path):
|
|
stream = open(path, 'rb')
|
|
try:
|
|
return stream.read()
|
|
finally:
|
|
stream.close()
|
|
|
|
register_loader_type(type(None), DefaultProvider)
|
|
|
|
|
|
class EmptyProvider(NullProvider):
|
|
"""Provider that returns nothing for all requests"""
|
|
|
|
_isdir = _has = lambda self,path: False
|
|
_get = lambda self,path: ''
|
|
_listdir = lambda self,path: []
|
|
module_path = None
|
|
|
|
def __init__(self):
|
|
pass
|
|
|
|
empty_provider = EmptyProvider()
|
|
|
|
|
|
|
|
|
|
class ZipProvider(EggProvider):
|
|
"""Resource support for zips and eggs"""
|
|
|
|
eagers = None
|
|
|
|
def __init__(self, module):
|
|
EggProvider.__init__(self,module)
|
|
self.zipinfo = zipimport._zip_directory_cache[self.loader.archive]
|
|
self.zip_pre = self.loader.archive+os.sep
|
|
|
|
def _zipinfo_name(self, fspath):
|
|
# Convert a virtual filename (full path to file) into a zipfile subpath
|
|
# usable with the zipimport directory cache for our target archive
|
|
if fspath.startswith(self.zip_pre):
|
|
return fspath[len(self.zip_pre):]
|
|
raise AssertionError(
|
|
"%s is not a subpath of %s" % (fspath,self.zip_pre)
|
|
)
|
|
|
|
def _parts(self,zip_path):
|
|
# Convert a zipfile subpath into an egg-relative path part list
|
|
fspath = self.zip_pre+zip_path # pseudo-fs path
|
|
if fspath.startswith(self.egg_root+os.sep):
|
|
return fspath[len(self.egg_root)+1:].split(os.sep)
|
|
raise AssertionError(
|
|
"%s is not a subpath of %s" % (fspath,self.egg_root)
|
|
)
|
|
|
|
def get_resource_filename(self, manager, resource_name):
|
|
if not self.egg_name:
|
|
raise NotImplementedError(
|
|
"resource_filename() only supported for .egg, not .zip"
|
|
)
|
|
# no need to lock for extraction, since we use temp names
|
|
zip_path = self._resource_to_zip(resource_name)
|
|
eagers = self._get_eager_resources()
|
|
if '/'.join(self._parts(zip_path)) in eagers:
|
|
for name in eagers:
|
|
self._extract_resource(manager, self._eager_to_zip(name))
|
|
return self._extract_resource(manager, zip_path)
|
|
|
|
def _extract_resource(self, manager, zip_path):
|
|
|
|
if zip_path in self._index():
|
|
for name in self._index()[zip_path]:
|
|
last = self._extract_resource(
|
|
manager, os.path.join(zip_path, name)
|
|
)
|
|
return os.path.dirname(last) # return the extracted directory name
|
|
|
|
zip_stat = self.zipinfo[zip_path]
|
|
t,d,size = zip_stat[5], zip_stat[6], zip_stat[3]
|
|
date_time = (
|
|
(d>>9)+1980, (d>>5)&0xF, d&0x1F, # ymd
|
|
(t&0xFFFF)>>11, (t>>5)&0x3F, (t&0x1F) * 2, 0, 0, -1 # hms, etc.
|
|
)
|
|
timestamp = time.mktime(date_time)
|
|
|
|
try:
|
|
real_path = manager.get_cache_path(
|
|
self.egg_name, self._parts(zip_path)
|
|
)
|
|
|
|
if os.path.isfile(real_path):
|
|
stat = os.stat(real_path)
|
|
if stat.st_size==size and stat.st_mtime==timestamp:
|
|
# size and stamp match, don't bother extracting
|
|
return real_path
|
|
|
|
outf, tmpnam = _mkstemp(".$extract", dir=os.path.dirname(real_path))
|
|
os.write(outf, self.loader.get_data(zip_path))
|
|
os.close(outf)
|
|
utime(tmpnam, (timestamp,timestamp))
|
|
manager.postprocess(tmpnam, real_path)
|
|
|
|
try:
|
|
rename(tmpnam, real_path)
|
|
|
|
except os.error:
|
|
if os.path.isfile(real_path):
|
|
stat = os.stat(real_path)
|
|
|
|
if stat.st_size==size and stat.st_mtime==timestamp:
|
|
# size and stamp match, somebody did it just ahead of
|
|
# us, so we're done
|
|
return real_path
|
|
elif os.name=='nt': # Windows, del old file and retry
|
|
unlink(real_path)
|
|
rename(tmpnam, real_path)
|
|
return real_path
|
|
raise
|
|
|
|
except os.error:
|
|
manager.extraction_error() # report a user-friendly error
|
|
|
|
return real_path
|
|
|
|
def _get_eager_resources(self):
|
|
if self.eagers is None:
|
|
eagers = []
|
|
for name in ('native_libs.txt', 'eager_resources.txt'):
|
|
if self.has_metadata(name):
|
|
eagers.extend(self.get_metadata_lines(name))
|
|
self.eagers = eagers
|
|
return self.eagers
|
|
|
|
def _index(self):
|
|
try:
|
|
return self._dirindex
|
|
except AttributeError:
|
|
ind = {}
|
|
for path in self.zipinfo:
|
|
parts = path.split(os.sep)
|
|
while parts:
|
|
parent = os.sep.join(parts[:-1])
|
|
if parent in ind:
|
|
ind[parent].append(parts[-1])
|
|
break
|
|
else:
|
|
ind[parent] = [parts.pop()]
|
|
self._dirindex = ind
|
|
return ind
|
|
|
|
def _has(self, fspath):
|
|
zip_path = self._zipinfo_name(fspath)
|
|
return zip_path in self.zipinfo or zip_path in self._index()
|
|
|
|
def _isdir(self,fspath):
|
|
return self._zipinfo_name(fspath) in self._index()
|
|
|
|
def _listdir(self,fspath):
|
|
return list(self._index().get(self._zipinfo_name(fspath), ()))
|
|
|
|
def _eager_to_zip(self,resource_name):
|
|
return self._zipinfo_name(self._fn(self.egg_root,resource_name))
|
|
|
|
def _resource_to_zip(self,resource_name):
|
|
return self._zipinfo_name(self._fn(self.module_path,resource_name))
|
|
|
|
register_loader_type(zipimport.zipimporter, ZipProvider)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class FileMetadata(EmptyProvider):
|
|
"""Metadata handler for standalone PKG-INFO files
|
|
|
|
Usage::
|
|
|
|
metadata = FileMetadata("/path/to/PKG-INFO")
|
|
|
|
This provider rejects all data and metadata requests except for PKG-INFO,
|
|
which is treated as existing, and will be the contents of the file at
|
|
the provided location.
|
|
"""
|
|
|
|
def __init__(self,path):
|
|
self.path = path
|
|
|
|
def has_metadata(self,name):
|
|
return name=='PKG-INFO'
|
|
|
|
def get_metadata(self,name):
|
|
if name=='PKG-INFO':
|
|
return open(self.path,'rU').read()
|
|
raise KeyError("No metadata except PKG-INFO is available")
|
|
|
|
def get_metadata_lines(self,name):
|
|
return yield_lines(self.get_metadata(name))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class PathMetadata(DefaultProvider):
|
|
"""Metadata provider for egg directories
|
|
|
|
Usage::
|
|
|
|
# Development eggs:
|
|
|
|
egg_info = "/path/to/PackageName.egg-info"
|
|
base_dir = os.path.dirname(egg_info)
|
|
metadata = PathMetadata(base_dir, egg_info)
|
|
dist_name = os.path.splitext(os.path.basename(egg_info))[0]
|
|
dist = Distribution(basedir,project_name=dist_name,metadata=metadata)
|
|
|
|
# Unpacked egg directories:
|
|
|
|
egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
|
|
metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
|
|
dist = Distribution.from_filename(egg_path, metadata=metadata)
|
|
"""
|
|
|
|
def __init__(self, path, egg_info):
|
|
self.module_path = path
|
|
self.egg_info = egg_info
|
|
|
|
|
|
class EggMetadata(ZipProvider):
|
|
"""Metadata provider for .egg files"""
|
|
|
|
def __init__(self, importer):
|
|
"""Create a metadata provider from a zipimporter"""
|
|
|
|
self.zipinfo = zipimport._zip_directory_cache[importer.archive]
|
|
self.zip_pre = importer.archive+os.sep
|
|
self.loader = importer
|
|
if importer.prefix:
|
|
self.module_path = os.path.join(importer.archive, importer.prefix)
|
|
else:
|
|
self.module_path = importer.archive
|
|
self._setup_prefix()
|
|
|
|
|
|
class ImpWrapper:
|
|
"""PEP 302 Importer that wraps Python's "normal" import algorithm"""
|
|
|
|
def __init__(self, path=None):
|
|
self.path = path
|
|
|
|
def find_module(self, fullname, path=None):
|
|
subname = fullname.split(".")[-1]
|
|
if subname != fullname and self.path is None:
|
|
return None
|
|
if self.path is None:
|
|
path = None
|
|
else:
|
|
path = [self.path]
|
|
try:
|
|
file, filename, etc = imp.find_module(subname, path)
|
|
except ImportError:
|
|
return None
|
|
return ImpLoader(file, filename, etc)
|
|
|
|
|
|
class ImpLoader:
|
|
"""PEP 302 Loader that wraps Python's "normal" import algorithm"""
|
|
|
|
def __init__(self, file, filename, etc):
|
|
self.file = file
|
|
self.filename = filename
|
|
self.etc = etc
|
|
|
|
def load_module(self, fullname):
|
|
try:
|
|
mod = imp.load_module(fullname, self.file, self.filename, self.etc)
|
|
finally:
|
|
if self.file: self.file.close()
|
|
# Note: we don't set __loader__ because we want the module to look
|
|
# normal; i.e. this is just a wrapper for standard import machinery
|
|
return mod
|
|
|
|
|
|
|
|
|
|
def get_importer(path_item):
|
|
"""Retrieve a PEP 302 "importer" for the given path item
|
|
|
|
If there is no importer, this returns a wrapper around the builtin import
|
|
machinery. The returned importer is only cached if it was created by a
|
|
path hook.
|
|
"""
|
|
try:
|
|
importer = sys.path_importer_cache[path_item]
|
|
except KeyError:
|
|
for hook in sys.path_hooks:
|
|
try:
|
|
importer = hook(path_item)
|
|
except ImportError:
|
|
pass
|
|
else:
|
|
break
|
|
else:
|
|
importer = None
|
|
|
|
sys.path_importer_cache.setdefault(path_item,importer)
|
|
if importer is None:
|
|
try:
|
|
importer = ImpWrapper(path_item)
|
|
except ImportError:
|
|
pass
|
|
return importer
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
_declare_state('dict', _distribution_finders = {})
|
|
|
|
def register_finder(importer_type, distribution_finder):
|
|
"""Register `distribution_finder` to find distributions in sys.path items
|
|
|
|
`importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
|
|
handler), and `distribution_finder` is a callable that, passed a path
|
|
item and the importer instance, yields ``Distribution`` instances found on
|
|
that path item. See ``pkg_resources.find_on_path`` for an example."""
|
|
_distribution_finders[importer_type] = distribution_finder
|
|
|
|
|
|
def find_distributions(path_item, only=False):
|
|
"""Yield distributions accessible via `path_item`"""
|
|
importer = get_importer(path_item)
|
|
finder = _find_adapter(_distribution_finders, importer)
|
|
return finder(importer, path_item, only)
|
|
|
|
def find_in_zip(importer, path_item, only=False):
|
|
metadata = EggMetadata(importer)
|
|
if metadata.has_metadata('PKG-INFO'):
|
|
yield Distribution.from_filename(path_item, metadata=metadata)
|
|
if only:
|
|
return # don't yield nested distros
|
|
for subitem in metadata.resource_listdir('/'):
|
|
if subitem.endswith('.egg'):
|
|
subpath = os.path.join(path_item, subitem)
|
|
for dist in find_in_zip(zipimport.zipimporter(subpath), subpath):
|
|
yield dist
|
|
|
|
register_finder(zipimport.zipimporter, find_in_zip)
|
|
|
|
def StringIO(*args, **kw):
|
|
"""Thunk to load the real StringIO on demand"""
|
|
global StringIO
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
from StringIO import StringIO
|
|
return StringIO(*args,**kw)
|
|
|
|
def find_nothing(importer, path_item, only=False):
|
|
return ()
|
|
register_finder(object,find_nothing)
|
|
|
|
def find_on_path(importer, path_item, only=False):
|
|
"""Yield distributions accessible on a sys.path directory"""
|
|
path_item = _normalize_cached(path_item)
|
|
|
|
if os.path.isdir(path_item) and os.access(path_item, os.R_OK):
|
|
if path_item.lower().endswith('.egg'):
|
|
# unpacked egg
|
|
yield Distribution.from_filename(
|
|
path_item, metadata=PathMetadata(
|
|
path_item, os.path.join(path_item,'EGG-INFO')
|
|
)
|
|
)
|
|
else:
|
|
# scan for .egg and .egg-info in directory
|
|
for entry in os.listdir(path_item):
|
|
lower = entry.lower()
|
|
if lower.endswith('.egg-info'):
|
|
fullpath = os.path.join(path_item, entry)
|
|
if os.path.isdir(fullpath):
|
|
# egg-info directory, allow getting metadata
|
|
metadata = PathMetadata(path_item, fullpath)
|
|
else:
|
|
metadata = FileMetadata(fullpath)
|
|
yield Distribution.from_location(
|
|
path_item,entry,metadata,precedence=DEVELOP_DIST
|
|
)
|
|
elif not only and lower.endswith('.egg'):
|
|
for dist in find_distributions(os.path.join(path_item, entry)):
|
|
yield dist
|
|
elif not only and lower.endswith('.egg-link'):
|
|
for line in file(os.path.join(path_item, entry)):
|
|
if not line.strip(): continue
|
|
for item in find_distributions(os.path.join(path_item,line.rstrip())):
|
|
yield item
|
|
break
|
|
register_finder(ImpWrapper, find_on_path)
|
|
|
|
_declare_state('dict', _namespace_handlers = {})
|
|
_declare_state('dict', _namespace_packages = {})
|
|
|
|
def register_namespace_handler(importer_type, namespace_handler):
|
|
"""Register `namespace_handler` to declare namespace packages
|
|
|
|
`importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
|
|
handler), and `namespace_handler` is a callable like this::
|
|
|
|
def namespace_handler(importer,path_entry,moduleName,module):
|
|
# return a path_entry to use for child packages
|
|
|
|
Namespace handlers are only called if the importer object has already
|
|
agreed that it can handle the relevant path item, and they should only
|
|
return a subpath if the module __path__ does not already contain an
|
|
equivalent subpath. For an example namespace handler, see
|
|
``pkg_resources.file_ns_handler``.
|
|
"""
|
|
_namespace_handlers[importer_type] = namespace_handler
|
|
|
|
def _handle_ns(packageName, path_item):
|
|
"""Ensure that named package includes a subpath of path_item (if needed)"""
|
|
importer = get_importer(path_item)
|
|
if importer is None:
|
|
return None
|
|
loader = importer.find_module(packageName)
|
|
if loader is None:
|
|
return None
|
|
module = sys.modules.get(packageName)
|
|
if module is None:
|
|
module = sys.modules[packageName] = imp.new_module(packageName)
|
|
module.__path__ = []; _set_parent_ns(packageName)
|
|
elif not hasattr(module,'__path__'):
|
|
raise TypeError("Not a package:", packageName)
|
|
handler = _find_adapter(_namespace_handlers, importer)
|
|
subpath = handler(importer,path_item,packageName,module)
|
|
if subpath is not None:
|
|
path = module.__path__; path.append(subpath)
|
|
loader.load_module(packageName); module.__path__ = path
|
|
return subpath
|
|
|
|
def declare_namespace(packageName):
|
|
"""Declare that package 'packageName' is a namespace package"""
|
|
|
|
imp.acquire_lock()
|
|
try:
|
|
if packageName in _namespace_packages:
|
|
return
|
|
|
|
path, parent = sys.path, None
|
|
if '.' in packageName:
|
|
parent = '.'.join(packageName.split('.')[:-1])
|
|
declare_namespace(parent)
|
|
__import__(parent)
|
|
try:
|
|
path = sys.modules[parent].__path__
|
|
except AttributeError:
|
|
raise TypeError("Not a package:", parent)
|
|
|
|
# Track what packages are namespaces, so when new path items are added,
|
|
# they can be updated
|
|
_namespace_packages.setdefault(parent,[]).append(packageName)
|
|
_namespace_packages.setdefault(packageName,[])
|
|
|
|
for path_item in path:
|
|
# Ensure all the parent's path items are reflected in the child,
|
|
# if they apply
|
|
_handle_ns(packageName, path_item)
|
|
|
|
finally:
|
|
imp.release_lock()
|
|
|
|
def fixup_namespace_packages(path_item, parent=None):
|
|
"""Ensure that previously-declared namespace packages include path_item"""
|
|
imp.acquire_lock()
|
|
try:
|
|
for package in _namespace_packages.get(parent,()):
|
|
subpath = _handle_ns(package, path_item)
|
|
if subpath: fixup_namespace_packages(subpath,package)
|
|
finally:
|
|
imp.release_lock()
|
|
|
|
def file_ns_handler(importer, path_item, packageName, module):
|
|
"""Compute an ns-package subpath for a filesystem or zipfile importer"""
|
|
|
|
subpath = os.path.join(path_item, packageName.split('.')[-1])
|
|
normalized = _normalize_cached(subpath)
|
|
for item in module.__path__:
|
|
if _normalize_cached(item)==normalized:
|
|
break
|
|
else:
|
|
# Only return the path if it's not already there
|
|
return subpath
|
|
|
|
register_namespace_handler(ImpWrapper,file_ns_handler)
|
|
register_namespace_handler(zipimport.zipimporter,file_ns_handler)
|
|
|
|
|
|
def null_ns_handler(importer, path_item, packageName, module):
|
|
return None
|
|
|
|
register_namespace_handler(object,null_ns_handler)
|
|
|
|
|
|
def normalize_path(filename):
|
|
"""Normalize a file/dir name for comparison purposes"""
|
|
return os.path.normcase(os.path.realpath(filename))
|
|
|
|
def _normalize_cached(filename,_cache={}):
|
|
try:
|
|
return _cache[filename]
|
|
except KeyError:
|
|
_cache[filename] = result = normalize_path(filename)
|
|
return result
|
|
|
|
def _set_parent_ns(packageName):
|
|
parts = packageName.split('.')
|
|
name = parts.pop()
|
|
if parts:
|
|
parent = '.'.join(parts)
|
|
setattr(sys.modules[parent], name, sys.modules[packageName])
|
|
|
|
|
|
def yield_lines(strs):
|
|
"""Yield non-empty/non-comment lines of a ``basestring`` or sequence"""
|
|
if isinstance(strs,basestring):
|
|
for s in strs.splitlines():
|
|
s = s.strip()
|
|
if s and not s.startswith('#'): # skip blank lines/comments
|
|
yield s
|
|
else:
|
|
for ss in strs:
|
|
for s in yield_lines(ss):
|
|
yield s
|
|
|
|
LINE_END = re.compile(r"\s*(#.*)?$").match # whitespace and comment
|
|
CONTINUE = re.compile(r"\s*\\\s*(#.*)?$").match # line continuation
|
|
DISTRO = re.compile(r"\s*((\w|[-.])+)").match # Distribution or extra
|
|
VERSION = re.compile(r"\s*(<=?|>=?|==|!=)\s*((\w|[-.])+)").match # ver. info
|
|
COMMA = re.compile(r"\s*,").match # comma between items
|
|
OBRACKET = re.compile(r"\s*\[").match
|
|
CBRACKET = re.compile(r"\s*\]").match
|
|
MODULE = re.compile(r"\w+(\.\w+)*$").match
|
|
EGG_NAME = re.compile(
|
|
r"(?P<name>[^-]+)"
|
|
r"( -(?P<ver>[^-]+) (-py(?P<pyver>[^-]+) (-(?P<plat>.+))? )? )?",
|
|
re.VERBOSE | re.IGNORECASE
|
|
).match
|
|
|
|
component_re = re.compile(r'(\d+ | [a-z]+ | \.| -)', re.VERBOSE)
|
|
replace = {'pre':'c', 'preview':'c','-':'final-','rc':'c','dev':'@'}.get
|
|
|
|
def _parse_version_parts(s):
|
|
for part in component_re.split(s):
|
|
part = replace(part,part)
|
|
if not part or part=='.':
|
|
continue
|
|
if part[:1] in '0123456789':
|
|
yield part.zfill(8) # pad for numeric comparison
|
|
else:
|
|
yield '*'+part
|
|
|
|
yield '*final' # ensure that alpha/beta/candidate are before final
|
|
|
|
def parse_version(s):
|
|
"""Convert a version string to a chronologically-sortable key
|
|
|
|
This is a rough cross between distutils' StrictVersion and LooseVersion;
|
|
if you give it versions that would work with StrictVersion, then it behaves
|
|
the same; otherwise it acts like a slightly-smarter LooseVersion. It is
|
|
*possible* to create pathological version coding schemes that will fool
|
|
this parser, but they should be very rare in practice.
|
|
|
|
The returned value will be a tuple of strings. Numeric portions of the
|
|
version are padded to 8 digits so they will compare numerically, but
|
|
without relying on how numbers compare relative to strings. Dots are
|
|
dropped, but dashes are retained. Trailing zeros between alpha segments
|
|
or dashes are suppressed, so that e.g. "2.4.0" is considered the same as
|
|
"2.4". Alphanumeric parts are lower-cased.
|
|
|
|
The algorithm assumes that strings like "-" and any alpha string that
|
|
alphabetically follows "final" represents a "patch level". So, "2.4-1"
|
|
is assumed to be a branch or patch of "2.4", and therefore "2.4.1" is
|
|
considered newer than "2.4-1", which in turn is newer than "2.4".
|
|
|
|
Strings like "a", "b", "c", "alpha", "beta", "candidate" and so on (that
|
|
come before "final" alphabetically) are assumed to be pre-release versions,
|
|
so that the version "2.4" is considered newer than "2.4a1".
|
|
|
|
Finally, to handle miscellaneous cases, the strings "pre", "preview", and
|
|
"rc" are treated as if they were "c", i.e. as though they were release
|
|
candidates, and therefore are not as new as a version string that does not
|
|
contain them, and "dev" is replaced with an '@' so that it sorts lower than
|
|
than any other pre-release tag.
|
|
"""
|
|
parts = []
|
|
for part in _parse_version_parts(s.lower()):
|
|
if part.startswith('*'):
|
|
if part<'*final': # remove '-' before a prerelease tag
|
|
while parts and parts[-1]=='*final-': parts.pop()
|
|
# remove trailing zeros from each series of numeric parts
|
|
while parts and parts[-1]=='00000000':
|
|
parts.pop()
|
|
parts.append(part)
|
|
return tuple(parts)
|
|
|
|
class EntryPoint(object):
|
|
"""Object representing an advertised importable object"""
|
|
|
|
def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
|
|
if not MODULE(module_name):
|
|
raise ValueError("Invalid module name", module_name)
|
|
self.name = name
|
|
self.module_name = module_name
|
|
self.attrs = tuple(attrs)
|
|
self.extras = Requirement.parse(("x[%s]" % ','.join(extras))).extras
|
|
self.dist = dist
|
|
|
|
def __str__(self):
|
|
s = "%s = %s" % (self.name, self.module_name)
|
|
if self.attrs:
|
|
s += ':' + '.'.join(self.attrs)
|
|
if self.extras:
|
|
s += ' [%s]' % ','.join(self.extras)
|
|
return s
|
|
|
|
def __repr__(self):
|
|
return "EntryPoint.parse(%r)" % str(self)
|
|
|
|
def load(self, require=True, env=None, installer=None):
|
|
if require: self.require(env, installer)
|
|
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
|
|
for attr in self.attrs:
|
|
try:
|
|
entry = getattr(entry,attr)
|
|
except AttributeError:
|
|
raise ImportError("%r has no %r attribute" % (entry,attr))
|
|
return entry
|
|
|
|
def require(self, env=None, installer=None):
|
|
if self.extras and not self.dist:
|
|
raise UnknownExtra("Can't require() without a distribution", self)
|
|
map(working_set.add,
|
|
working_set.resolve(self.dist.requires(self.extras),env,installer))
|
|
|
|
|
|
|
|
#@classmethod
|
|
def parse(cls, src, dist=None):
|
|
"""Parse a single entry point from string `src`
|
|
|
|
Entry point syntax follows the form::
|
|
|
|
name = some.module:some.attr [extra1,extra2]
|
|
|
|
The entry name and module name are required, but the ``:attrs`` and
|
|
``[extras]`` parts are optional
|
|
"""
|
|
try:
|
|
attrs = extras = ()
|
|
name,value = src.split('=',1)
|
|
if '[' in value:
|
|
value,extras = value.split('[',1)
|
|
req = Requirement.parse("x["+extras)
|
|
if req.specs: raise ValueError
|
|
extras = req.extras
|
|
if ':' in value:
|
|
value,attrs = value.split(':',1)
|
|
if not MODULE(attrs.rstrip()):
|
|
raise ValueError
|
|
attrs = attrs.rstrip().split('.')
|
|
except ValueError:
|
|
raise ValueError(
|
|
"EntryPoint must be in 'name=module:attrs [extras]' format",
|
|
src
|
|
)
|
|
else:
|
|
return cls(name.strip(), value.strip(), attrs, extras, dist)
|
|
|
|
parse = classmethod(parse)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#@classmethod
|
|
def parse_group(cls, group, lines, dist=None):
|
|
"""Parse an entry point group"""
|
|
if not MODULE(group):
|
|
raise ValueError("Invalid group name", group)
|
|
this = {}
|
|
for line in yield_lines(lines):
|
|
ep = cls.parse(line, dist)
|
|
if ep.name in this:
|
|
raise ValueError("Duplicate entry point", group, ep.name)
|
|
this[ep.name]=ep
|
|
return this
|
|
|
|
parse_group = classmethod(parse_group)
|
|
|
|
#@classmethod
|
|
def parse_map(cls, data, dist=None):
|
|
"""Parse a map of entry point groups"""
|
|
if isinstance(data,dict):
|
|
data = data.items()
|
|
else:
|
|
data = split_sections(data)
|
|
maps = {}
|
|
for group, lines in data:
|
|
if group is None:
|
|
if not lines:
|
|
continue
|
|
raise ValueError("Entry points must be listed in groups")
|
|
group = group.strip()
|
|
if group in maps:
|
|
raise ValueError("Duplicate group name", group)
|
|
maps[group] = cls.parse_group(group, lines, dist)
|
|
return maps
|
|
|
|
parse_map = classmethod(parse_map)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class Distribution(object):
|
|
"""Wrap an actual or potential sys.path entry w/metadata"""
|
|
def __init__(self,
|
|
location=None, metadata=None, project_name=None, version=None,
|
|
py_version=PY_MAJOR, platform=None, precedence = EGG_DIST
|
|
):
|
|
self.project_name = safe_name(project_name or 'Unknown')
|
|
if version is not None:
|
|
self._version = safe_version(version)
|
|
self.py_version = py_version
|
|
self.platform = platform
|
|
self.location = location
|
|
self.precedence = precedence
|
|
self._provider = metadata or empty_provider
|
|
|
|
#@classmethod
|
|
def from_location(cls,location,basename,metadata=None,**kw):
|
|
project_name, version, py_version, platform = [None]*4
|
|
basename, ext = os.path.splitext(basename)
|
|
if ext.lower() in (".egg",".egg-info"):
|
|
match = EGG_NAME(basename)
|
|
if match:
|
|
project_name, version, py_version, platform = match.group(
|
|
'name','ver','pyver','plat'
|
|
)
|
|
return cls(
|
|
location, metadata, project_name=project_name, version=version,
|
|
py_version=py_version, platform=platform, **kw
|
|
)
|
|
from_location = classmethod(from_location)
|
|
|
|
hashcmp = property(
|
|
lambda self: (
|
|
getattr(self,'parsed_version',()), self.precedence, self.key,
|
|
-len(self.location or ''), self.location, self.py_version,
|
|
self.platform
|
|
)
|
|
)
|
|
def __cmp__(self, other): return cmp(self.hashcmp, other)
|
|
def __hash__(self): return hash(self.hashcmp)
|
|
|
|
# These properties have to be lazy so that we don't have to load any
|
|
# metadata until/unless it's actually needed. (i.e., some distributions
|
|
# may not know their name or version without loading PKG-INFO)
|
|
|
|
#@property
|
|
def key(self):
|
|
try:
|
|
return self._key
|
|
except AttributeError:
|
|
self._key = key = self.project_name.lower()
|
|
return key
|
|
key = property(key)
|
|
|
|
#@property
|
|
def parsed_version(self):
|
|
try:
|
|
return self._parsed_version
|
|
except AttributeError:
|
|
self._parsed_version = pv = parse_version(self.version)
|
|
return pv
|
|
|
|
parsed_version = property(parsed_version)
|
|
|
|
#@property
|
|
def version(self):
|
|
try:
|
|
return self._version
|
|
except AttributeError:
|
|
for line in self._get_metadata('PKG-INFO'):
|
|
if line.lower().startswith('version:'):
|
|
self._version = safe_version(line.split(':',1)[1].strip())
|
|
return self._version
|
|
else:
|
|
raise ValueError(
|
|
"Missing 'Version:' header and/or PKG-INFO file", self
|
|
)
|
|
version = property(version)
|
|
|
|
|
|
|
|
|
|
#@property
|
|
def _dep_map(self):
|
|
try:
|
|
return self.__dep_map
|
|
except AttributeError:
|
|
dm = self.__dep_map = {None: []}
|
|
for name in 'requires.txt', 'depends.txt':
|
|
for extra,reqs in split_sections(self._get_metadata(name)):
|
|
if extra: extra = safe_extra(extra)
|
|
dm.setdefault(extra,[]).extend(parse_requirements(reqs))
|
|
return dm
|
|
_dep_map = property(_dep_map)
|
|
|
|
def requires(self,extras=()):
|
|
"""List of Requirements needed for this distro if `extras` are used"""
|
|
dm = self._dep_map
|
|
deps = []
|
|
deps.extend(dm.get(None,()))
|
|
for ext in extras:
|
|
try:
|
|
deps.extend(dm[safe_extra(ext)])
|
|
except KeyError:
|
|
raise UnknownExtra(
|
|
"%s has no such extra feature %r" % (self, ext)
|
|
)
|
|
return deps
|
|
|
|
def _get_metadata(self,name):
|
|
if self.has_metadata(name):
|
|
for line in self.get_metadata_lines(name):
|
|
yield line
|
|
|
|
def activate(self,path=None):
|
|
"""Ensure distribution is importable on `path` (default=sys.path)"""
|
|
if path is None: path = sys.path
|
|
self.insert_on(path)
|
|
if path is sys.path:
|
|
fixup_namespace_packages(self.location)
|
|
for pkg in self._get_metadata('namespace_packages.txt'):
|
|
if pkg in sys.modules: declare_namespace(pkg)
|
|
|
|
def egg_name(self):
|
|
"""Return what this distribution's standard .egg filename should be"""
|
|
filename = "%s-%s-py%s" % (
|
|
to_filename(self.project_name), to_filename(self.version),
|
|
self.py_version or PY_MAJOR
|
|
)
|
|
|
|
if self.platform:
|
|
filename += '-'+self.platform
|
|
return filename
|
|
|
|
def __repr__(self):
|
|
if self.location:
|
|
return "%s (%s)" % (self,self.location)
|
|
else:
|
|
return str(self)
|
|
|
|
def __str__(self):
|
|
try: version = getattr(self,'version',None)
|
|
except ValueError: version = None
|
|
version = version or "[unknown version]"
|
|
return "%s %s" % (self.project_name,version)
|
|
|
|
def __getattr__(self,attr):
|
|
"""Delegate all unrecognized public attributes to .metadata provider"""
|
|
if attr.startswith('_'):
|
|
raise AttributeError,attr
|
|
return getattr(self._provider, attr)
|
|
|
|
#@classmethod
|
|
def from_filename(cls,filename,metadata=None, **kw):
|
|
return cls.from_location(
|
|
_normalize_cached(filename), os.path.basename(filename), metadata,
|
|
**kw
|
|
)
|
|
from_filename = classmethod(from_filename)
|
|
|
|
def as_requirement(self):
|
|
"""Return a ``Requirement`` that matches this distribution exactly"""
|
|
return Requirement.parse('%s==%s' % (self.project_name, self.version))
|
|
|
|
def load_entry_point(self, group, name):
|
|
"""Return the `name` entry point of `group` or raise ImportError"""
|
|
ep = self.get_entry_info(group,name)
|
|
if ep is None:
|
|
raise ImportError("Entry point %r not found" % ((group,name),))
|
|
return ep.load()
|
|
|
|
def get_entry_map(self, group=None):
|
|
"""Return the entry point map for `group`, or the full entry map"""
|
|
try:
|
|
ep_map = self._ep_map
|
|
except AttributeError:
|
|
ep_map = self._ep_map = EntryPoint.parse_map(
|
|
self._get_metadata('entry_points.txt'), self
|
|
)
|
|
if group is not None:
|
|
return ep_map.get(group,{})
|
|
return ep_map
|
|
|
|
def get_entry_info(self, group, name):
|
|
"""Return the EntryPoint object for `group`+`name`, or ``None``"""
|
|
return self.get_entry_map(group).get(name)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def insert_on(self, path, loc = None):
|
|
"""Insert self.location in path before its nearest parent directory"""
|
|
|
|
loc = loc or self.location
|
|
if not loc:
|
|
return
|
|
|
|
nloc = _normalize_cached(loc)
|
|
bdir = os.path.dirname(nloc)
|
|
npath= [(p and _normalize_cached(p) or p) for p in path]
|
|
|
|
bp = None
|
|
for p, item in enumerate(npath):
|
|
if item==nloc:
|
|
break
|
|
elif item==bdir and self.precedence==EGG_DIST:
|
|
# if it's an .egg, give it precedence over its directory
|
|
if path is sys.path:
|
|
self.check_version_conflict()
|
|
path.insert(p, loc)
|
|
npath.insert(p, nloc)
|
|
break
|
|
else:
|
|
if path is sys.path:
|
|
self.check_version_conflict()
|
|
path.append(loc)
|
|
return
|
|
|
|
# p is the spot where we found or inserted loc; now remove duplicates
|
|
while 1:
|
|
try:
|
|
np = npath.index(nloc, p+1)
|
|
except ValueError:
|
|
break
|
|
else:
|
|
del npath[np], path[np]
|
|
p = np # ha!
|
|
|
|
return
|
|
|
|
|
|
def check_version_conflict(self):
|
|
if self.key=='setuptools':
|
|
return # ignore the inevitable setuptools self-conflicts :(
|
|
|
|
nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
|
|
loc = normalize_path(self.location)
|
|
for modname in self._get_metadata('top_level.txt'):
|
|
if (modname not in sys.modules or modname in nsp
|
|
or modname in _namespace_packages
|
|
):
|
|
continue
|
|
|
|
fn = getattr(sys.modules[modname], '__file__', None)
|
|
if fn and (normalize_path(fn).startswith(loc) or fn.startswith(loc)):
|
|
continue
|
|
issue_warning(
|
|
"Module %s was already imported from %s, but %s is being added"
|
|
" to sys.path" % (modname, fn, self.location),
|
|
)
|
|
|
|
def has_version(self):
|
|
try:
|
|
self.version
|
|
except ValueError:
|
|
issue_warning("Unbuilt egg for "+repr(self))
|
|
return False
|
|
return True
|
|
|
|
def clone(self,**kw):
|
|
"""Copy this distribution, substituting in any changed keyword args"""
|
|
for attr in (
|
|
'project_name', 'version', 'py_version', 'platform', 'location',
|
|
'precedence'
|
|
):
|
|
kw.setdefault(attr, getattr(self,attr,None))
|
|
kw.setdefault('metadata', self._provider)
|
|
return self.__class__(**kw)
|
|
|
|
|
|
|
|
|
|
#@property
|
|
def extras(self):
|
|
return [dep for dep in self._dep_map if dep]
|
|
extras = property(extras)
|
|
|
|
|
|
def issue_warning(*args,**kw):
|
|
level = 1
|
|
g = globals()
|
|
try:
|
|
# find the first stack frame that is *not* code in
|
|
# the pkg_resources module, to use for the warning
|
|
while sys._getframe(level).f_globals is g:
|
|
level += 1
|
|
except ValueError:
|
|
pass
|
|
from warnings import warn
|
|
warn(stacklevel = level+1, *args, **kw)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
def parse_requirements(strs):
|
|
"""Yield ``Requirement`` objects for each specification in `strs`
|
|
|
|
`strs` must be an instance of ``basestring``, or a (possibly-nested)
|
|
iterable thereof.
|
|
"""
|
|
# create a steppable iterator, so we can handle \-continuations
|
|
lines = iter(yield_lines(strs))
|
|
|
|
def scan_list(ITEM,TERMINATOR,line,p,groups,item_name):
|
|
|
|
items = []
|
|
|
|
while not TERMINATOR(line,p):
|
|
if CONTINUE(line,p):
|
|
try:
|
|
line = lines.next(); p = 0
|
|
except StopIteration:
|
|
raise ValueError(
|
|
"\\ must not appear on the last nonblank line"
|
|
)
|
|
|
|
match = ITEM(line,p)
|
|
if not match:
|
|
raise ValueError("Expected "+item_name+" in",line,"at",line[p:])
|
|
|
|
items.append(match.group(*groups))
|
|
p = match.end()
|
|
|
|
match = COMMA(line,p)
|
|
if match:
|
|
p = match.end() # skip the comma
|
|
elif not TERMINATOR(line,p):
|
|
raise ValueError(
|
|
"Expected ',' or end-of-list in",line,"at",line[p:]
|
|
)
|
|
|
|
match = TERMINATOR(line,p)
|
|
if match: p = match.end() # skip the terminator, if any
|
|
return line, p, items
|
|
|
|
for line in lines:
|
|
match = DISTRO(line)
|
|
if not match:
|
|
raise ValueError("Missing distribution spec", line)
|
|
project_name = match.group(1)
|
|
p = match.end()
|
|
extras = []
|
|
|
|
match = OBRACKET(line,p)
|
|
if match:
|
|
p = match.end()
|
|
line, p, extras = scan_list(
|
|
DISTRO, CBRACKET, line, p, (1,), "'extra' name"
|
|
)
|
|
|
|
line, p, specs = scan_list(VERSION,LINE_END,line,p,(1,2),"version spec")
|
|
specs = [(op,safe_version(val)) for op,val in specs]
|
|
yield Requirement(project_name, specs, extras)
|
|
|
|
|
|
def _sort_dists(dists):
|
|
tmp = [(dist.hashcmp,dist) for dist in dists]
|
|
tmp.sort()
|
|
dists[::-1] = [d for hc,d in tmp]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
class Requirement:
|
|
def __init__(self, project_name, specs, extras):
|
|
"""DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
|
|
self.unsafe_name, project_name = project_name, safe_name(project_name)
|
|
self.project_name, self.key = project_name, project_name.lower()
|
|
index = [(parse_version(v),state_machine[op],op,v) for op,v in specs]
|
|
index.sort()
|
|
self.specs = [(op,ver) for parsed,trans,op,ver in index]
|
|
self.index, self.extras = index, tuple(map(safe_extra,extras))
|
|
self.hashCmp = (
|
|
self.key, tuple([(op,parsed) for parsed,trans,op,ver in index]),
|
|
frozenset(self.extras)
|
|
)
|
|
self.__hash = hash(self.hashCmp)
|
|
|
|
def __str__(self):
|
|
specs = ','.join([''.join(s) for s in self.specs])
|
|
extras = ','.join(self.extras)
|
|
if extras: extras = '[%s]' % extras
|
|
return '%s%s%s' % (self.project_name, extras, specs)
|
|
|
|
def __eq__(self,other):
|
|
return isinstance(other,Requirement) and self.hashCmp==other.hashCmp
|
|
|
|
def __contains__(self,item):
|
|
if isinstance(item,Distribution):
|
|
if item.key != self.key: return False
|
|
if self.index: item = item.parsed_version # only get if we need it
|
|
elif isinstance(item,basestring):
|
|
item = parse_version(item)
|
|
last = None
|
|
for parsed,trans,op,ver in self.index:
|
|
action = trans[cmp(item,parsed)]
|
|
if action=='F': return False
|
|
elif action=='T': return True
|
|
elif action=='+': last = True
|
|
elif action=='-' or last is None: last = False
|
|
if last is None: last = True # no rules encountered
|
|
return last
|
|
|
|
|
|
def __hash__(self):
|
|
return self.__hash
|
|
|
|
def __repr__(self): return "Requirement.parse(%r)" % str(self)
|
|
|
|
#@staticmethod
|
|
def parse(s):
|
|
reqs = list(parse_requirements(s))
|
|
if reqs:
|
|
if len(reqs)==1:
|
|
return reqs[0]
|
|
raise ValueError("Expected only one requirement", s)
|
|
raise ValueError("No requirements found", s)
|
|
|
|
parse = staticmethod(parse)
|
|
|
|
state_machine = {
|
|
# =><
|
|
'<' : '--T',
|
|
'<=': 'T-T',
|
|
'>' : 'F+F',
|
|
'>=': 'T+F',
|
|
'==': 'T..',
|
|
'!=': 'F++',
|
|
}
|
|
|
|
|
|
def _get_mro(cls):
|
|
"""Get an mro for a type or classic class"""
|
|
if not isinstance(cls,type):
|
|
class cls(cls,object): pass
|
|
return cls.__mro__[1:]
|
|
return cls.__mro__
|
|
|
|
def _find_adapter(registry, ob):
|
|
"""Return an adapter factory for `ob` from `registry`"""
|
|
for t in _get_mro(getattr(ob, '__class__', type(ob))):
|
|
if t in registry:
|
|
return registry[t]
|
|
|
|
|
|
def ensure_directory(path):
|
|
"""Ensure that the parent directory of `path` exists"""
|
|
dirname = os.path.dirname(path)
|
|
if not os.path.isdir(dirname):
|
|
os.makedirs(dirname)
|
|
|
|
def split_sections(s):
|
|
"""Split a string or iterable thereof into (section,content) pairs
|
|
|
|
Each ``section`` is a stripped version of the section header ("[section]")
|
|
and each ``content`` is a list of stripped lines excluding blank lines and
|
|
comment-only lines. If there are any such lines before the first section
|
|
header, they're returned in a first ``section`` of ``None``.
|
|
"""
|
|
section = None
|
|
content = []
|
|
for line in yield_lines(s):
|
|
if line.startswith("["):
|
|
if line.endswith("]"):
|
|
if section or content:
|
|
yield section, content
|
|
section = line[1:-1].strip()
|
|
content = []
|
|
else:
|
|
raise ValueError("Invalid section heading", line)
|
|
else:
|
|
content.append(line)
|
|
|
|
# wrap up last segment
|
|
yield section, content
|
|
|
|
def _mkstemp(*args,**kw):
|
|
from tempfile import mkstemp
|
|
old_open = os.open
|
|
try:
|
|
os.open = os_open # temporarily bypass sandboxing
|
|
return mkstemp(*args,**kw)
|
|
finally:
|
|
os.open = old_open # and then put it back
|
|
|
|
|
|
# Set up global resource manager (deliberately not state-saved)
|
|
_manager = ResourceManager()
|
|
def _initialize(g):
|
|
for name in dir(_manager):
|
|
if not name.startswith('_'):
|
|
g[name] = getattr(_manager, name)
|
|
_initialize(globals())
|
|
|
|
# Prepare the master working set and make the ``require()`` API available
|
|
__requires__ = None
|
|
_declare_state('object', working_set = WorkingSet())
|
|
try:
|
|
# Does the main program list any requirements?
|
|
from __main__ import __requires__
|
|
except ImportError:
|
|
pass # No: just use the default working set based on sys.path
|
|
else:
|
|
# Yes: ensure the requirements are met, by prefixing sys.path if necessary
|
|
try:
|
|
working_set.require(__requires__)
|
|
except (VersionConflict, DistributionNotFound): # try it without defaults already on sys.path
|
|
working_set = WorkingSet([]) # by starting with an empty path
|
|
try:
|
|
for dist in working_set.resolve(
|
|
parse_requirements(__requires__), Environment()
|
|
):
|
|
working_set.add(dist)
|
|
except DistributionNotFound:
|
|
pass
|
|
for entry in sys.path: # add any missing entries from sys.path
|
|
if entry not in working_set.entries:
|
|
working_set.add_entry(entry)
|
|
sys.path[:] = working_set.entries # then copy back to sys.path
|
|
|
|
require = working_set.require
|
|
iter_entry_points = working_set.iter_entry_points
|
|
add_activation_listener = working_set.subscribe
|
|
run_script = working_set.run_script
|
|
run_main = run_script # backward compatibility
|
|
# Activate all distributions already on sys.path, and ensure that
|
|
# all distributions added to the working set in the future (e.g. by
|
|
# calling ``require()``) will get activated as well.
|
|
add_activation_listener(lambda dist: dist.activate())
|
|
working_set.entries=[]; map(working_set.add_entry,sys.path) # match order
|
|
|