2882 lines
99 KiB
Python
2882 lines
99 KiB
Python
"""
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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
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import os
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import io
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import time
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import re
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import imp
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import zipfile
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import zipimport
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import warnings
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import stat
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import functools
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import pkgutil
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import token
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import symbol
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import operator
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import platform
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import collections
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import plistlib
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import email.parser
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import tempfile
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from pkgutil import get_importer
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PY3 = sys.version_info > (3,)
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PY2 = not PY3
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if PY3:
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from urllib.parse import urlparse, urlunparse
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if PY2:
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from urlparse import urlparse, urlunparse
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if PY3:
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string_types = str,
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else:
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string_types = str, eval('unicode')
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# capture these to bypass sandboxing
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from os import utime
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try:
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from os import mkdir, rename, unlink
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WRITE_SUPPORT = True
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except ImportError:
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# no write support, probably under GAE
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WRITE_SUPPORT = False
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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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# Avoid try/except due to potential problems with delayed import mechanisms.
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if sys.version_info >= (3, 3) and sys.implementation.name == "cpython":
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import importlib._bootstrap as importlib_bootstrap
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else:
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importlib_bootstrap = None
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try:
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import parser
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except ImportError:
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pass
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_state_vars = {}
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def _declare_state(vartype, **kw):
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globals().update(kw)
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_state_vars.update(dict.fromkeys(kw, 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.items():
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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.items():
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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()
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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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# not Mac OS X
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pass
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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',
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'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',
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'UnknownExtra', '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', 'invalid_marker', 'evaluate_marker',
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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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version = platform.mac_ver()[0]
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# fallback for MacPorts
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if version == '':
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plist = '/System/Library/CoreServices/SystemVersion.plist'
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if os.path.exists(plist):
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if hasattr(plistlib, 'readPlist'):
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plist_content = plistlib.readPlist(plist)
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if 'ProductVersion' in plist_content:
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version = plist_content['ProductVersion']
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_cache.append(version.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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try:
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# Python 2.7 or >=3.2
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from sysconfig import get_platform
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except ImportError:
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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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# XXX backward compat
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get_platform = get_build_platform
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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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# easy case
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return True
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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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return True
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# egg isn't macosx or legacy darwin
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return False
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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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|
|
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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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# backward compatibility
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run_main = run_script
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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, string_types):
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dist = Requirement.parse(dist)
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if isinstance(dist, Requirement):
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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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|
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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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|
|
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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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|
|
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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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|
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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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|
|
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def get_resource_string(manager, resource_name):
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|
"""Return a string containing the contents of `resource_name`
|
|
|
|
`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
|
|
|
|
for entry in entries:
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self.add_entry(entry)
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|
|
|
@classmethod
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def _build_master(cls):
|
|
"""
|
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Prepare the master working set.
|
|
"""
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|
ws = cls()
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try:
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|
from __main__ import __requires__
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|
except ImportError:
|
|
# The main program does not list any requirements
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|
return ws
|
|
|
|
# ensure the requirements are met
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|
try:
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ws.require(__requires__)
|
|
except VersionConflict:
|
|
return cls._build_from_requirements(__requires__)
|
|
|
|
return ws
|
|
|
|
@classmethod
|
|
def _build_from_requirements(cls, req_spec):
|
|
"""
|
|
Build a working set from a requirement spec. Rewrites sys.path.
|
|
"""
|
|
# try it without defaults already on sys.path
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|
# by starting with an empty path
|
|
ws = cls([])
|
|
reqs = parse_requirements(req_spec)
|
|
dists = ws.resolve(reqs, Environment())
|
|
for dist in dists:
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|
ws.add(dist)
|
|
|
|
# add any missing entries from sys.path
|
|
for entry in sys.path:
|
|
if entry not in ws.entries:
|
|
ws.add_entry(entry)
|
|
|
|
# then copy back to sys.path
|
|
sys.path[:] = ws.entries
|
|
return ws
|
|
|
|
def add_entry(self, entry):
|
|
"""Add a path item to ``.entries``, finding any distributions on it
|
|
|
|
``find_distributions(entry, True)`` is used to find distributions
|
|
corresponding to the path entry, and they are added. `entry` is
|
|
always appended to ``.entries``, even if it is already present.
|
|
(This is because ``sys.path`` can contain the same value more than
|
|
once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
|
|
equal ``sys.path``.)
|
|
"""
|
|
self.entry_keys.setdefault(entry, [])
|
|
self.entries.append(entry)
|
|
for dist in find_distributions(entry, True):
|
|
self.add(dist, entry, False)
|
|
|
|
def __contains__(self, dist):
|
|
"""True if `dist` is the active distribution for its project"""
|
|
return self.by_key.get(dist.key) == dist
|
|
|
|
def find(self, req):
|
|
"""Find a distribution matching requirement `req`
|
|
|
|
If there is an active distribution for the requested project, this
|
|
returns it as long as it meets the version requirement specified by
|
|
`req`. But, if there is an active distribution for the project and it
|
|
does *not* meet the `req` requirement, ``VersionConflict`` is raised.
|
|
If there is no active distribution for the requested project, ``None``
|
|
is returned.
|
|
"""
|
|
dist = self.by_key.get(req.key)
|
|
if dist is not None and dist not in req:
|
|
# XXX add more info
|
|
raise VersionConflict(dist, req)
|
|
else:
|
|
return dist
|
|
|
|
def iter_entry_points(self, group, name=None):
|
|
"""Yield entry point objects from `group` matching `name`
|
|
|
|
If `name` is None, yields all entry points in `group` from all
|
|
distributions in the working set, otherwise only ones matching
|
|
both `group` and `name` are yielded (in distribution order).
|
|
"""
|
|
for dist in self:
|
|
entries = dist.get_entry_map(group)
|
|
if name is None:
|
|
for ep in entries.values():
|
|
yield ep
|
|
elif name in entries:
|
|
yield entries[name]
|
|
|
|
def run_script(self, requires, script_name):
|
|
"""Locate distribution for `requires` and run `script_name` script"""
|
|
ns = sys._getframe(1).f_globals
|
|
name = ns['__name__']
|
|
ns.clear()
|
|
ns['__name__'] = name
|
|
self.require(requires)[0].run_script(script_name, ns)
|
|
|
|
def __iter__(self):
|
|
"""Yield distributions for non-duplicate projects in the working set
|
|
|
|
The yield order is the order in which the items' path entries were
|
|
added to the working set.
|
|
"""
|
|
seen = {}
|
|
for item in self.entries:
|
|
if item not in self.entry_keys:
|
|
# workaround a cache issue
|
|
continue
|
|
|
|
for key in self.entry_keys[item]:
|
|
if key not in seen:
|
|
seen[key]=1
|
|
yield self.by_key[key]
|
|
|
|
def add(self, dist, entry=None, insert=True, replace=False):
|
|
"""Add `dist` to working set, associated with `entry`
|
|
|
|
If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
|
|
On exit from this routine, `entry` is added to the end of the working
|
|
set's ``.entries`` (if it wasn't already present).
|
|
|
|
`dist` is only added to the working set if it's for a project that
|
|
doesn't already have a distribution in the set, unless `replace=True`.
|
|
If it's added, any callbacks registered with the ``subscribe()`` method
|
|
will be called.
|
|
"""
|
|
if insert:
|
|
dist.insert_on(self.entries, entry)
|
|
|
|
if entry is None:
|
|
entry = dist.location
|
|
keys = self.entry_keys.setdefault(entry,[])
|
|
keys2 = self.entry_keys.setdefault(dist.location,[])
|
|
if not replace and dist.key in self.by_key:
|
|
# ignore hidden distros
|
|
return
|
|
|
|
self.by_key[dist.key] = dist
|
|
if dist.key not in keys:
|
|
keys.append(dist.key)
|
|
if dist.key not in keys2:
|
|
keys2.append(dist.key)
|
|
self._added_new(dist)
|
|
|
|
def resolve(self, requirements, env=None, installer=None,
|
|
replace_conflicting=False):
|
|
"""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``.
|
|
|
|
Unless `replace_conflicting=True`, raises a VersionConflict exception if
|
|
any requirements are found on the path that have the correct name but
|
|
the wrong version. Otherwise, if an `installer` is supplied it will be
|
|
invoked to obtain the correct version of the requirement and activate
|
|
it.
|
|
"""
|
|
|
|
# set up the stack
|
|
requirements = list(requirements)[::-1]
|
|
# set of processed requirements
|
|
processed = {}
|
|
# key -> dist
|
|
best = {}
|
|
to_activate = []
|
|
|
|
while requirements:
|
|
# process dependencies breadth-first
|
|
req = requirements.pop(0)
|
|
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 or (dist not in req and replace_conflicting):
|
|
ws = self
|
|
if env is None:
|
|
if dist is None:
|
|
env = Environment(self.entries)
|
|
else:
|
|
# Use an empty environment and workingset to avoid
|
|
# any further conflicts with the conflicting
|
|
# distribution
|
|
env = Environment([])
|
|
ws = WorkingSet([])
|
|
dist = best[req.key] = env.best_match(req, ws, installer)
|
|
if dist is None:
|
|
#msg = ("The '%s' distribution was not found on this "
|
|
# "system, and is required by this application.")
|
|
#raise DistributionNotFound(msg % req)
|
|
|
|
# unfortunately, zc.buildout uses a str(err)
|
|
# to get the name of the distribution here..
|
|
raise DistributionNotFound(req)
|
|
to_activate.append(dist)
|
|
if dist not in req:
|
|
# Oops, the "best" so far conflicts with a dependency
|
|
# XXX put more info here
|
|
raise VersionConflict(dist, req)
|
|
requirements.extend(dist.requires(req.extras)[::-1])
|
|
processed[req] = True
|
|
|
|
# return list of distros to activate
|
|
return 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)
|
|
)
|
|
# add plugins+libs to sys.path
|
|
map(working_set.add, distributions)
|
|
# display errors
|
|
print('Could not load', 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)
|
|
# scan project names in alphabetic order
|
|
plugin_projects.sort()
|
|
|
|
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__([])
|
|
# put all our entries in shadow_set
|
|
list(map(shadow_set.add, self))
|
|
|
|
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 = sys.exc_info()[1]
|
|
# save error info
|
|
error_info[dist] = v
|
|
if fallback:
|
|
# try the next older version of project
|
|
continue
|
|
else:
|
|
# give up on this project, keep going
|
|
break
|
|
|
|
else:
|
|
list(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, e_k_b_c):
|
|
entries, keys, by_key, callbacks = e_k_b_c
|
|
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. ``'3.3'``);
|
|
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.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`
|
|
|
|
Uses case-insensitive `project_name` comparison, assuming all the
|
|
project's distributions use their project's name converted to all
|
|
lowercase as their key.
|
|
|
|
"""
|
|
distribution_key = project_name.lower()
|
|
return self._distmap.get(distribution_key, [])
|
|
|
|
def add(self, dist):
|
|
"""Add `dist` if we ``can_add()`` it and it has not already been added
|
|
"""
|
|
if self.can_add(dist) and dist.has_version():
|
|
dists = self._distmap.setdefault(dist.key, [])
|
|
if dist not in dists:
|
|
dists.append(dist)
|
|
dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
|
|
|
|
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 distribution in the
|
|
environment that meets the ``Requirement`` in `req`. If no suitable
|
|
distribution is found, and `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
|
|
for dist in self[req.key]:
|
|
if dist in req:
|
|
return dist
|
|
# try to download/install
|
|
return self.obtain(req, installer)
|
|
|
|
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
|
|
|
|
|
|
# XXX backward compatibility
|
|
AvailableDistributions = Environment
|
|
|
|
|
|
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._warn_unsafe_extraction_path(extract_path)
|
|
|
|
self.cached_files[target_path] = 1
|
|
return target_path
|
|
|
|
@staticmethod
|
|
def _warn_unsafe_extraction_path(path):
|
|
"""
|
|
If the default extraction path is overridden and set to an insecure
|
|
location, such as /tmp, it opens up an opportunity for an attacker to
|
|
replace an extracted file with an unauthorized payload. Warn the user
|
|
if a known insecure location is used.
|
|
|
|
See Distribute #375 for more details.
|
|
"""
|
|
if os.name == 'nt' and not path.startswith(os.environ['windir']):
|
|
# On Windows, permissions are generally restrictive by default
|
|
# and temp directories are not writable by other users, so
|
|
# bypass the warning.
|
|
return
|
|
mode = os.stat(path).st_mode
|
|
if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
|
|
msg = ("%s is writable by group/others and vulnerable to attack "
|
|
"when "
|
|
"used with get_resource_filename. Consider a more secure "
|
|
"location (set with .set_extraction_path or the "
|
|
"PYTHON_EGG_CACHE environment variable)." % path)
|
|
warnings.warn(msg, UserWarning)
|
|
|
|
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) | 0o555) & 0o7777
|
|
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')
|
|
|
|
# XXX this may be locale-specific!
|
|
app_data = 'Application Data'
|
|
app_homes = [
|
|
# best option, should be locale-safe
|
|
(('APPDATA',), None),
|
|
(('USERPROFILE',), app_data),
|
|
(('HOMEDRIVE','HOMEPATH'), app_data),
|
|
(('HOMEPATH',), app_data),
|
|
(('HOME',), None),
|
|
# 95/98/ME
|
|
(('WINDIR',), app_data),
|
|
]
|
|
|
|
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 MarkerEvaluation(object):
|
|
values = {
|
|
'os_name': lambda: os.name,
|
|
'sys_platform': lambda: sys.platform,
|
|
'python_full_version': platform.python_version,
|
|
'python_version': lambda: platform.python_version()[:3],
|
|
'platform_version': platform.version,
|
|
'platform_machine': platform.machine,
|
|
'python_implementation': platform.python_implementation,
|
|
}
|
|
|
|
@classmethod
|
|
def is_invalid_marker(cls, text):
|
|
"""
|
|
Validate text as a PEP 426 environment marker; return an exception
|
|
if invalid or False otherwise.
|
|
"""
|
|
try:
|
|
cls.evaluate_marker(text)
|
|
except SyntaxError:
|
|
return cls.normalize_exception(sys.exc_info()[1])
|
|
return False
|
|
|
|
@staticmethod
|
|
def normalize_exception(exc):
|
|
"""
|
|
Given a SyntaxError from a marker evaluation, normalize the error
|
|
message:
|
|
- Remove indications of filename and line number.
|
|
- Replace platform-specific error messages with standard error
|
|
messages.
|
|
"""
|
|
subs = {
|
|
'unexpected EOF while parsing': 'invalid syntax',
|
|
'parenthesis is never closed': 'invalid syntax',
|
|
}
|
|
exc.filename = None
|
|
exc.lineno = None
|
|
exc.msg = subs.get(exc.msg, exc.msg)
|
|
return exc
|
|
|
|
@classmethod
|
|
def and_test(cls, nodelist):
|
|
# MUST NOT short-circuit evaluation, or invalid syntax can be skipped!
|
|
items = [
|
|
cls.interpret(nodelist[i])
|
|
for i in range(1, len(nodelist), 2)
|
|
]
|
|
return functools.reduce(operator.and_, items)
|
|
|
|
@classmethod
|
|
def test(cls, nodelist):
|
|
# MUST NOT short-circuit evaluation, or invalid syntax can be skipped!
|
|
items = [
|
|
cls.interpret(nodelist[i])
|
|
for i in range(1, len(nodelist), 2)
|
|
]
|
|
return functools.reduce(operator.or_, items)
|
|
|
|
@classmethod
|
|
def atom(cls, nodelist):
|
|
t = nodelist[1][0]
|
|
if t == token.LPAR:
|
|
if nodelist[2][0] == token.RPAR:
|
|
raise SyntaxError("Empty parentheses")
|
|
return cls.interpret(nodelist[2])
|
|
msg = "Language feature not supported in environment markers"
|
|
raise SyntaxError(msg)
|
|
|
|
@classmethod
|
|
def comparison(cls, nodelist):
|
|
if len(nodelist) > 4:
|
|
msg = "Chained comparison not allowed in environment markers"
|
|
raise SyntaxError(msg)
|
|
comp = nodelist[2][1]
|
|
cop = comp[1]
|
|
if comp[0] == token.NAME:
|
|
if len(nodelist[2]) == 3:
|
|
if cop == 'not':
|
|
cop = 'not in'
|
|
else:
|
|
cop = 'is not'
|
|
try:
|
|
cop = cls.get_op(cop)
|
|
except KeyError:
|
|
msg = repr(cop) + " operator not allowed in environment markers"
|
|
raise SyntaxError(msg)
|
|
return cop(cls.evaluate(nodelist[1]), cls.evaluate(nodelist[3]))
|
|
|
|
@classmethod
|
|
def get_op(cls, op):
|
|
ops = {
|
|
symbol.test: cls.test,
|
|
symbol.and_test: cls.and_test,
|
|
symbol.atom: cls.atom,
|
|
symbol.comparison: cls.comparison,
|
|
'not in': lambda x, y: x not in y,
|
|
'in': lambda x, y: x in y,
|
|
'==': operator.eq,
|
|
'!=': operator.ne,
|
|
}
|
|
if hasattr(symbol, 'or_test'):
|
|
ops[symbol.or_test] = cls.test
|
|
return ops[op]
|
|
|
|
@classmethod
|
|
def evaluate_marker(cls, text, extra=None):
|
|
"""
|
|
Evaluate a PEP 426 environment marker on CPython 2.4+.
|
|
Return a boolean indicating the marker result in this environment.
|
|
Raise SyntaxError if marker is invalid.
|
|
|
|
This implementation uses the 'parser' module, which is not implemented
|
|
on
|
|
Jython and has been superseded by the 'ast' module in Python 2.6 and
|
|
later.
|
|
"""
|
|
return cls.interpret(parser.expr(text).totuple(1)[1])
|
|
|
|
@classmethod
|
|
def _markerlib_evaluate(cls, text):
|
|
"""
|
|
Evaluate a PEP 426 environment marker using markerlib.
|
|
Return a boolean indicating the marker result in this environment.
|
|
Raise SyntaxError if marker is invalid.
|
|
"""
|
|
import _markerlib
|
|
# markerlib implements Metadata 1.2 (PEP 345) environment markers.
|
|
# Translate the variables to Metadata 2.0 (PEP 426).
|
|
env = _markerlib.default_environment()
|
|
for key in env.keys():
|
|
new_key = key.replace('.', '_')
|
|
env[new_key] = env.pop(key)
|
|
try:
|
|
result = _markerlib.interpret(text, env)
|
|
except NameError:
|
|
e = sys.exc_info()[1]
|
|
raise SyntaxError(e.args[0])
|
|
return result
|
|
|
|
if 'parser' not in globals():
|
|
# Fall back to less-complete _markerlib implementation if 'parser' module
|
|
# is not available.
|
|
evaluate_marker = _markerlib_evaluate
|
|
|
|
@classmethod
|
|
def interpret(cls, nodelist):
|
|
while len(nodelist)==2: nodelist = nodelist[1]
|
|
try:
|
|
op = cls.get_op(nodelist[0])
|
|
except KeyError:
|
|
raise SyntaxError("Comparison or logical expression expected")
|
|
return op(nodelist)
|
|
|
|
@classmethod
|
|
def evaluate(cls, nodelist):
|
|
while len(nodelist)==2: nodelist = nodelist[1]
|
|
kind = nodelist[0]
|
|
name = nodelist[1]
|
|
if kind==token.NAME:
|
|
try:
|
|
op = cls.values[name]
|
|
except KeyError:
|
|
raise SyntaxError("Unknown name %r" % name)
|
|
return op()
|
|
if kind==token.STRING:
|
|
s = nodelist[1]
|
|
if not cls._safe_string(s):
|
|
raise SyntaxError(
|
|
"Only plain strings allowed in environment markers")
|
|
return s[1:-1]
|
|
msg = "Language feature not supported in environment markers"
|
|
raise SyntaxError(msg)
|
|
|
|
@staticmethod
|
|
def _safe_string(cand):
|
|
return (
|
|
cand[:1] in "'\"" and
|
|
not cand.startswith('"""') and
|
|
not cand.startswith("'''") and
|
|
'\\' not in cand
|
|
)
|
|
|
|
invalid_marker = MarkerEvaluation.is_invalid_marker
|
|
evaluate_marker = MarkerEvaluation.evaluate_marker
|
|
|
|
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 io.BytesIO(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))
|
|
|
|
if sys.version_info <= (3,):
|
|
def get_metadata(self, name):
|
|
if not self.egg_info:
|
|
return ""
|
|
return self._get(self._fn(self.egg_info, name))
|
|
else:
|
|
def get_metadata(self, name):
|
|
if not self.egg_info:
|
|
return ""
|
|
return self._get(self._fn(self.egg_info, name)).decode("utf-8")
|
|
|
|
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):
|
|
source = open(script_filename).read()
|
|
code = compile(source, script_filename, 'exec')
|
|
exec(code, 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, 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):
|
|
with open(path, 'rb') as stream:
|
|
return stream.read()
|
|
|
|
register_loader_type(type(None), DefaultProvider)
|
|
|
|
if importlib_bootstrap is not None:
|
|
register_loader_type(importlib_bootstrap.SourceFileLoader, 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 ZipManifests(dict):
|
|
"""
|
|
zip manifest builder
|
|
"""
|
|
|
|
@classmethod
|
|
def build(cls, path):
|
|
"""
|
|
Build a dictionary similar to the zipimport directory
|
|
caches, except instead of tuples, store ZipInfo objects.
|
|
|
|
Use a platform-specific path separator (os.sep) for the path keys
|
|
for compatibility with pypy on Windows.
|
|
"""
|
|
with ContextualZipFile(path) as zfile:
|
|
items = (
|
|
(
|
|
name.replace('/', os.sep),
|
|
zfile.getinfo(name),
|
|
)
|
|
for name in zfile.namelist()
|
|
)
|
|
return dict(items)
|
|
|
|
load = build
|
|
|
|
|
|
class MemoizedZipManifests(ZipManifests):
|
|
"""
|
|
Memoized zipfile manifests.
|
|
"""
|
|
manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
|
|
|
|
def load(self, path):
|
|
"""
|
|
Load a manifest at path or return a suitable manifest already loaded.
|
|
"""
|
|
path = os.path.normpath(path)
|
|
mtime = os.stat(path).st_mtime
|
|
|
|
if path not in self or self[path].mtime != mtime:
|
|
manifest = self.build(path)
|
|
self[path] = self.manifest_mod(manifest, mtime)
|
|
|
|
return self[path].manifest
|
|
|
|
|
|
class ContextualZipFile(zipfile.ZipFile):
|
|
"""
|
|
Supplement ZipFile class to support context manager for Python 2.6
|
|
"""
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, type, value, traceback):
|
|
self.close()
|
|
|
|
def __new__(cls, *args, **kwargs):
|
|
"""
|
|
Construct a ZipFile or ContextualZipFile as appropriate
|
|
"""
|
|
if hasattr(zipfile.ZipFile, '__exit__'):
|
|
return zipfile.ZipFile(*args, **kwargs)
|
|
return super(ContextualZipFile, cls).__new__(cls)
|
|
|
|
|
|
class ZipProvider(EggProvider):
|
|
"""Resource support for zips and eggs"""
|
|
|
|
eagers = None
|
|
_zip_manifests = MemoizedZipManifests()
|
|
|
|
def __init__(self, module):
|
|
EggProvider.__init__(self, module)
|
|
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.
|
|
# pseudo-fs path
|
|
fspath = self.zip_pre+zip_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)
|
|
)
|
|
|
|
@property
|
|
def zipinfo(self):
|
|
return self._zip_manifests.load(self.loader.archive)
|
|
|
|
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)
|
|
|
|
@staticmethod
|
|
def _get_date_and_size(zip_stat):
|
|
size = zip_stat.file_size
|
|
# ymdhms+wday, yday, dst
|
|
date_time = zip_stat.date_time + (0, 0, -1)
|
|
# 1980 offset already done
|
|
timestamp = time.mktime(date_time)
|
|
return timestamp, size
|
|
|
|
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 the extracted directory name
|
|
return os.path.dirname(last)
|
|
|
|
timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
|
|
|
|
if not WRITE_SUPPORT:
|
|
raise IOError('"os.rename" and "os.unlink" are not supported '
|
|
'on this platform')
|
|
try:
|
|
|
|
real_path = manager.get_cache_path(
|
|
self.egg_name, self._parts(zip_path)
|
|
)
|
|
|
|
if self._is_current(real_path, zip_path):
|
|
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):
|
|
if self._is_current(real_path, zip_path):
|
|
# the file became current since it was checked above,
|
|
# so proceed.
|
|
return real_path
|
|
# Windows, del old file and retry
|
|
elif os.name=='nt':
|
|
unlink(real_path)
|
|
rename(tmpnam, real_path)
|
|
return real_path
|
|
raise
|
|
|
|
except os.error:
|
|
# report a user-friendly error
|
|
manager.extraction_error()
|
|
|
|
return real_path
|
|
|
|
def _is_current(self, file_path, zip_path):
|
|
"""
|
|
Return True if the file_path is current for this zip_path
|
|
"""
|
|
timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
|
|
if not os.path.isfile(file_path):
|
|
return False
|
|
stat = os.stat(file_path)
|
|
if stat.st_size!=size or stat.st_mtime!=timestamp:
|
|
return False
|
|
# check that the contents match
|
|
zip_contents = self.loader.get_data(zip_path)
|
|
with open(file_path, 'rb') as f:
|
|
file_contents = f.read()
|
|
return zip_contents == file_contents
|
|
|
|
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':
|
|
with open(self.path,'rU') as f:
|
|
metadata = f.read()
|
|
return metadata
|
|
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.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()
|
|
|
|
_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_eggs_in_zip(importer, path_item, only=False):
|
|
"""
|
|
Find eggs in zip files; possibly multiple nested eggs.
|
|
"""
|
|
if importer.archive.endswith('.whl'):
|
|
# wheels are not supported with this finder
|
|
# they don't have PKG-INFO metadata, and won't ever contain eggs
|
|
return
|
|
metadata = EggMetadata(importer)
|
|
if metadata.has_metadata('PKG-INFO'):
|
|
yield Distribution.from_filename(path_item, metadata=metadata)
|
|
if only:
|
|
# don't yield nested distros
|
|
return
|
|
for subitem in metadata.resource_listdir('/'):
|
|
if subitem.endswith('.egg'):
|
|
subpath = os.path.join(path_item, subitem)
|
|
for dist in find_eggs_in_zip(zipimport.zipimporter(subpath), subpath):
|
|
yield dist
|
|
|
|
register_finder(zipimport.zipimporter, find_eggs_in_zip)
|
|
|
|
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') or lower.endswith('.dist-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'):
|
|
dists = find_distributions(os.path.join(path_item, entry))
|
|
for dist in dists:
|
|
yield dist
|
|
elif not only and lower.endswith('.egg-link'):
|
|
with open(os.path.join(path_item, entry)) as entry_file:
|
|
entry_lines = entry_file.readlines()
|
|
for line in entry_lines:
|
|
if not line.strip():
|
|
continue
|
|
path = os.path.join(path_item, line.rstrip())
|
|
dists = find_distributions(path)
|
|
for item in dists:
|
|
yield item
|
|
break
|
|
register_finder(pkgutil.ImpImporter, find_on_path)
|
|
|
|
if importlib_bootstrap is not None:
|
|
register_finder(importlib_bootstrap.FileFinder, 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)
|
|
for path_item in path:
|
|
if path_item not in module.__path__:
|
|
module.__path__.append(path_item)
|
|
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)
|
|
if parent not in _namespace_packages:
|
|
__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(pkgutil.ImpImporter, file_ns_handler)
|
|
register_namespace_handler(zipimport.zipimporter, file_ns_handler)
|
|
|
|
if importlib_bootstrap is not None:
|
|
register_namespace_handler(importlib_bootstrap.FileFinder, 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 string or sequence"""
|
|
if isinstance(strs, string_types):
|
|
for s in strs.splitlines():
|
|
s = s.strip()
|
|
# skip blank lines/comments
|
|
if s and not s.startswith('#'):
|
|
yield s
|
|
else:
|
|
for ss in strs:
|
|
for s in yield_lines(ss):
|
|
yield s
|
|
|
|
# whitespace and comment
|
|
LINE_END = re.compile(r"\s*(#.*)?$").match
|
|
# line continuation
|
|
CONTINUE = re.compile(r"\s*\\\s*(#.*)?$").match
|
|
# Distribution or extra
|
|
DISTRO = re.compile(r"\s*((\w|[-.])+)").match
|
|
# ver. info
|
|
VERSION = re.compile(r"\s*(<=?|>=?|==|!=)\s*((\w|[-.])+)").match
|
|
# comma between items
|
|
COMMA = re.compile(r"\s*,").match
|
|
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':
|
|
# pad for numeric comparison
|
|
yield part.zfill(8)
|
|
else:
|
|
yield '*'+part
|
|
|
|
# ensure that alpha/beta/candidate are before final
|
|
yield '*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('*'):
|
|
# remove '-' before a prerelease tag
|
|
if part < '*final':
|
|
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)
|
|
reqs = self.dist.requires(self.extras)
|
|
items = working_set.resolve(reqs, env, installer)
|
|
list(map(working_set.add, items))
|
|
|
|
@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:
|
|
msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
|
|
raise ValueError(msg, src)
|
|
else:
|
|
return cls(name.strip(), value.strip(), attrs, extras, dist)
|
|
|
|
@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
|
|
|
|
@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
|
|
|
|
|
|
def _remove_md5_fragment(location):
|
|
if not location:
|
|
return ''
|
|
parsed = urlparse(location)
|
|
if parsed[-1].startswith('md5='):
|
|
return urlunparse(parsed[:-1] + ('',))
|
|
return location
|
|
|
|
|
|
class Distribution(object):
|
|
"""Wrap an actual or potential sys.path entry w/metadata"""
|
|
PKG_INFO = 'PKG-INFO'
|
|
|
|
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 _distributionImpl:
|
|
# .dist-info gets much metadata differently
|
|
match = EGG_NAME(basename)
|
|
if match:
|
|
project_name, version, py_version, platform = match.group(
|
|
'name','ver','pyver','plat'
|
|
)
|
|
cls = _distributionImpl[ext.lower()]
|
|
return cls(
|
|
location, metadata, project_name=project_name, version=version,
|
|
py_version=py_version, platform=platform, **kw
|
|
)
|
|
|
|
@property
|
|
def hashcmp(self):
|
|
return (
|
|
getattr(self, 'parsed_version', ()),
|
|
self.precedence,
|
|
self.key,
|
|
_remove_md5_fragment(self.location),
|
|
self.py_version,
|
|
self.platform,
|
|
)
|
|
|
|
def __hash__(self):
|
|
return hash(self.hashcmp)
|
|
|
|
def __lt__(self, other):
|
|
return self.hashcmp < other.hashcmp
|
|
|
|
def __le__(self, other):
|
|
return self.hashcmp <= other.hashcmp
|
|
|
|
def __gt__(self, other):
|
|
return self.hashcmp > other.hashcmp
|
|
|
|
def __ge__(self, other):
|
|
return self.hashcmp >= other.hashcmp
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, self.__class__):
|
|
# It's not a Distribution, so they are not equal
|
|
return False
|
|
return self.hashcmp == other.hashcmp
|
|
|
|
def __ne__(self, other):
|
|
return not self == other
|
|
|
|
# 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
|
|
|
|
@property
|
|
def parsed_version(self):
|
|
try:
|
|
return self._parsed_version
|
|
except AttributeError:
|
|
self._parsed_version = pv = parse_version(self.version)
|
|
return pv
|
|
|
|
@property
|
|
def version(self):
|
|
try:
|
|
return self._version
|
|
except AttributeError:
|
|
for line in self._get_metadata(self.PKG_INFO):
|
|
if line.lower().startswith('version:'):
|
|
self._version = safe_version(line.split(':',1)[1].strip())
|
|
return self._version
|
|
else:
|
|
tmpl = "Missing 'Version:' header and/or %s file"
|
|
raise ValueError(tmpl % self.PKG_INFO, self)
|
|
|
|
@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:
|
|
if ':' in extra:
|
|
extra, marker = extra.split(':', 1)
|
|
if invalid_marker(marker):
|
|
# XXX warn
|
|
reqs=[]
|
|
elif not evaluate_marker(marker):
|
|
reqs=[]
|
|
extra = safe_extra(extra) or None
|
|
dm.setdefault(extra,[]).extend(parse_requirements(reqs))
|
|
return dm
|
|
|
|
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
|
|
)
|
|
|
|
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]
|
|
|
|
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 True:
|
|
try:
|
|
np = npath.index(nloc, p+1)
|
|
except ValueError:
|
|
break
|
|
else:
|
|
del npath[np], path[np]
|
|
# ha!
|
|
p = np
|
|
|
|
return
|
|
|
|
def check_version_conflict(self):
|
|
if self.key == 'setuptools':
|
|
# ignore the inevitable setuptools self-conflicts :(
|
|
return
|
|
|
|
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
|
|
if modname in ('pkg_resources', 'setuptools', 'site'):
|
|
continue
|
|
fn = getattr(sys.modules[modname], '__file__', None)
|
|
if fn and (normalize_path(fn).startswith(loc) or
|
|
fn.startswith(self.location)):
|
|
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"""
|
|
names = 'project_name version py_version platform location precedence'
|
|
for attr in names.split():
|
|
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]
|
|
|
|
|
|
class DistInfoDistribution(Distribution):
|
|
"""Wrap an actual or potential sys.path entry w/metadata, .dist-info style"""
|
|
PKG_INFO = 'METADATA'
|
|
EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
|
|
|
|
@property
|
|
def _parsed_pkg_info(self):
|
|
"""Parse and cache metadata"""
|
|
try:
|
|
return self._pkg_info
|
|
except AttributeError:
|
|
metadata = self.get_metadata(self.PKG_INFO)
|
|
self._pkg_info = email.parser.Parser().parsestr(metadata)
|
|
return self._pkg_info
|
|
|
|
@property
|
|
def _dep_map(self):
|
|
try:
|
|
return self.__dep_map
|
|
except AttributeError:
|
|
self.__dep_map = self._compute_dependencies()
|
|
return self.__dep_map
|
|
|
|
def _preparse_requirement(self, requires_dist):
|
|
"""Convert 'Foobar (1); baz' to ('Foobar ==1', 'baz')
|
|
Split environment marker, add == prefix to version specifiers as
|
|
necessary, and remove parenthesis.
|
|
"""
|
|
parts = requires_dist.split(';', 1) + ['']
|
|
distvers = parts[0].strip()
|
|
mark = parts[1].strip()
|
|
distvers = re.sub(self.EQEQ, r"\1==\2\3", distvers)
|
|
distvers = distvers.replace('(', '').replace(')', '')
|
|
return (distvers, mark)
|
|
|
|
def _compute_dependencies(self):
|
|
"""Recompute this distribution's dependencies."""
|
|
from _markerlib import compile as compile_marker
|
|
dm = self.__dep_map = {None: []}
|
|
|
|
reqs = []
|
|
# Including any condition expressions
|
|
for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
|
|
distvers, mark = self._preparse_requirement(req)
|
|
parsed = next(parse_requirements(distvers))
|
|
parsed.marker_fn = compile_marker(mark)
|
|
reqs.append(parsed)
|
|
|
|
def reqs_for_extra(extra):
|
|
for req in reqs:
|
|
if req.marker_fn(override={'extra':extra}):
|
|
yield req
|
|
|
|
common = frozenset(reqs_for_extra(None))
|
|
dm[None].extend(common)
|
|
|
|
for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
|
|
extra = safe_extra(extra.strip())
|
|
dm[extra] = list(frozenset(reqs_for_extra(extra)) - common)
|
|
|
|
return dm
|
|
|
|
|
|
_distributionImpl = {
|
|
'.egg': Distribution,
|
|
'.egg-info': Distribution,
|
|
'.dist-info': DistInfoDistribution,
|
|
}
|
|
|
|
|
|
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
|
|
warnings.warn(stacklevel=level + 1, *args, **kw)
|
|
|
|
|
|
def parse_requirements(strs):
|
|
"""Yield ``Requirement`` objects for each specification in `strs`
|
|
|
|
`strs` must be a string, 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 = next(lines)
|
|
p = 0
|
|
except StopIteration:
|
|
raise ValueError(
|
|
"\\ must not appear on the last nonblank line"
|
|
)
|
|
|
|
match = ITEM(line, p)
|
|
if not match:
|
|
msg = "Expected " + item_name + " in"
|
|
raise ValueError(msg, line, "at", line[p:])
|
|
|
|
items.append(match.group(*groups))
|
|
p = match.end()
|
|
|
|
match = COMMA(line, p)
|
|
if match:
|
|
# skip the comma
|
|
p = match.end()
|
|
elif not TERMINATOR(line, p):
|
|
msg = "Expected ',' or end-of-list in"
|
|
raise ValueError(msg, line, "at", line[p:])
|
|
|
|
match = TERMINATOR(line, p)
|
|
# skip the terminator, if any
|
|
if match:
|
|
p = match.end()
|
|
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)
|
|
|
|
|
|
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
|
|
# only get if we need it
|
|
if self.index:
|
|
item = item.parsed_version
|
|
elif isinstance(item, string_types):
|
|
item = parse_version(item)
|
|
last = None
|
|
# -1, 0, 1
|
|
compare = lambda a, b: (a > b) - (a < b)
|
|
for parsed, trans, op, ver in self.index:
|
|
# Indexing: 0, 1, -1
|
|
action = trans[compare(item, parsed)]
|
|
if action == 'F':
|
|
return False
|
|
elif action == 'T':
|
|
return True
|
|
elif action == '+':
|
|
last = True
|
|
elif action == '-' or last is None:
|
|
last = False
|
|
# no rules encountered
|
|
if last is None:
|
|
last = True
|
|
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)
|
|
|
|
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 _bypass_ensure_directory(path, mode=0o777):
|
|
"""Sandbox-bypassing version of ensure_directory()"""
|
|
if not WRITE_SUPPORT:
|
|
raise IOError('"os.mkdir" not supported on this platform.')
|
|
dirname, filename = split(path)
|
|
if dirname and filename and not isdir(dirname):
|
|
_bypass_ensure_directory(dirname)
|
|
mkdir(dirname, mode)
|
|
|
|
|
|
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):
|
|
old_open = os.open
|
|
try:
|
|
# temporarily bypass sandboxing
|
|
os.open = os_open
|
|
return tempfile.mkstemp(*args,**kw)
|
|
finally:
|
|
# and then put it back
|
|
os.open = old_open
|
|
|
|
|
|
# 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
|
|
working_set = WorkingSet._build_master()
|
|
_declare_state('object', working_set=working_set)
|
|
|
|
require = working_set.require
|
|
iter_entry_points = working_set.iter_entry_points
|
|
add_activation_listener = working_set.subscribe
|
|
run_script = working_set.run_script
|
|
# backward compatibility
|
|
run_main = run_script
|
|
# 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=[]
|
|
# match order
|
|
list(map(working_set.add_entry, sys.path))
|