3296 lines
106 KiB
Python
3296 lines
106 KiB
Python
# coding: utf-8
|
||
"""
|
||
Package resource API
|
||
--------------------
|
||
|
||
A resource is a logical file contained within a package, or a logical
|
||
subdirectory thereof. The package resource API expects resource names
|
||
to have their path parts separated with ``/``, *not* whatever the local
|
||
path separator is. Do not use os.path operations to manipulate resource
|
||
names being passed into the API.
|
||
|
||
The package resource API is designed to work with normal filesystem packages,
|
||
.egg files, and unpacked .egg files. It can also work in a limited way with
|
||
.zip files and with custom PEP 302 loaders that support the ``get_data()``
|
||
method.
|
||
"""
|
||
|
||
from __future__ import absolute_import
|
||
|
||
import sys
|
||
import os
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||
import io
|
||
import time
|
||
import re
|
||
import types
|
||
import zipfile
|
||
import zipimport
|
||
import warnings
|
||
import stat
|
||
import functools
|
||
import pkgutil
|
||
import operator
|
||
import platform
|
||
import collections
|
||
import plistlib
|
||
import email.parser
|
||
import errno
|
||
import tempfile
|
||
import textwrap
|
||
import itertools
|
||
import inspect
|
||
import ntpath
|
||
import posixpath
|
||
from pkgutil import get_importer
|
||
|
||
try:
|
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import _imp
|
||
except ImportError:
|
||
# Python 3.2 compatibility
|
||
import imp as _imp
|
||
|
||
try:
|
||
FileExistsError
|
||
except NameError:
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||
FileExistsError = OSError
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||
|
||
from pkg_resources.extern import six
|
||
from pkg_resources.extern.six.moves import urllib, map, filter
|
||
|
||
# capture these to bypass sandboxing
|
||
from os import utime
|
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try:
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||
from os import mkdir, rename, unlink
|
||
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
|
||
from os.path import isdir, split
|
||
|
||
try:
|
||
import importlib.machinery as importlib_machinery
|
||
# access attribute to force import under delayed import mechanisms.
|
||
importlib_machinery.__name__
|
||
except ImportError:
|
||
importlib_machinery = None
|
||
|
||
from . import py31compat
|
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from pkg_resources.extern import appdirs
|
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from pkg_resources.extern import packaging
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__import__('pkg_resources.extern.packaging.version')
|
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__import__('pkg_resources.extern.packaging.specifiers')
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__import__('pkg_resources.extern.packaging.requirements')
|
||
__import__('pkg_resources.extern.packaging.markers')
|
||
|
||
|
||
__metaclass__ = type
|
||
|
||
|
||
if (3, 0) < sys.version_info < (3, 4):
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raise RuntimeError("Python 3.4 or later is required")
|
||
|
||
if six.PY2:
|
||
# Those builtin exceptions are only defined in Python 3
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||
PermissionError = None
|
||
NotADirectoryError = None
|
||
|
||
# declare some globals that will be defined later to
|
||
# satisfy the linters.
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||
require = None
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||
working_set = None
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||
add_activation_listener = None
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||
resources_stream = None
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||
cleanup_resources = None
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||
resource_dir = None
|
||
resource_stream = None
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||
set_extraction_path = None
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||
resource_isdir = None
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||
resource_string = None
|
||
iter_entry_points = None
|
||
resource_listdir = None
|
||
resource_filename = None
|
||
resource_exists = None
|
||
_distribution_finders = None
|
||
_namespace_handlers = None
|
||
_namespace_packages = None
|
||
|
||
|
||
class PEP440Warning(RuntimeWarning):
|
||
"""
|
||
Used when there is an issue with a version or specifier not complying with
|
||
PEP 440.
|
||
"""
|
||
|
||
|
||
def parse_version(v):
|
||
try:
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||
return packaging.version.Version(v)
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||
except packaging.version.InvalidVersion:
|
||
return packaging.version.LegacyVersion(v)
|
||
|
||
|
||
_state_vars = {}
|
||
|
||
|
||
def _declare_state(vartype, **kw):
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||
globals().update(kw)
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_state_vars.update(dict.fromkeys(kw, vartype))
|
||
|
||
|
||
def __getstate__():
|
||
state = {}
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||
g = globals()
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||
for k, v in _state_vars.items():
|
||
state[k] = g['_sget_' + v](g[k])
|
||
return state
|
||
|
||
|
||
def __setstate__(state):
|
||
g = globals()
|
||
for k, v in state.items():
|
||
g['_sset_' + _state_vars[k]](k, g[k], v)
|
||
return state
|
||
|
||
|
||
def _sget_dict(val):
|
||
return val.copy()
|
||
|
||
|
||
def _sset_dict(key, ob, state):
|
||
ob.clear()
|
||
ob.update(state)
|
||
|
||
|
||
def _sget_object(val):
|
||
return val.__getstate__()
|
||
|
||
|
||
def _sset_object(key, ob, state):
|
||
ob.__setstate__(state)
|
||
|
||
|
||
_sget_none = _sset_none = lambda *args: None
|
||
|
||
|
||
def get_supported_platform():
|
||
"""Return this platform's maximum compatible version.
|
||
|
||
distutils.util.get_platform() normally reports the minimum version
|
||
of Mac OS X that would be required to *use* extensions produced by
|
||
distutils. But what we want when checking compatibility is to know the
|
||
version of Mac OS X that we are *running*. To allow usage of packages that
|
||
explicitly require a newer version of Mac OS X, we must also know the
|
||
current version of the OS.
|
||
|
||
If this condition occurs for any other platform with a version in its
|
||
platform strings, this function should be extended accordingly.
|
||
"""
|
||
plat = get_build_platform()
|
||
m = macosVersionString.match(plat)
|
||
if m is not None and sys.platform == "darwin":
|
||
try:
|
||
plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
|
||
except ValueError:
|
||
# not Mac OS X
|
||
pass
|
||
return plat
|
||
|
||
|
||
__all__ = [
|
||
# Basic resource access and distribution/entry point discovery
|
||
'require', 'run_script', 'get_provider', 'get_distribution',
|
||
'load_entry_point', 'get_entry_map', 'get_entry_info',
|
||
'iter_entry_points',
|
||
'resource_string', 'resource_stream', 'resource_filename',
|
||
'resource_listdir', 'resource_exists', 'resource_isdir',
|
||
|
||
# Environmental control
|
||
'declare_namespace', 'working_set', 'add_activation_listener',
|
||
'find_distributions', 'set_extraction_path', 'cleanup_resources',
|
||
'get_default_cache',
|
||
|
||
# Primary implementation classes
|
||
'Environment', 'WorkingSet', 'ResourceManager',
|
||
'Distribution', 'Requirement', 'EntryPoint',
|
||
|
||
# Exceptions
|
||
'ResolutionError', 'VersionConflict', 'DistributionNotFound',
|
||
'UnknownExtra', 'ExtractionError',
|
||
|
||
# Warnings
|
||
'PEP440Warning',
|
||
|
||
# Parsing functions and string utilities
|
||
'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
|
||
'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
|
||
'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
|
||
|
||
# filesystem utilities
|
||
'ensure_directory', 'normalize_path',
|
||
|
||
# Distribution "precedence" constants
|
||
'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
|
||
|
||
# "Provider" interfaces, implementations, and registration/lookup APIs
|
||
'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
|
||
'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
|
||
'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
|
||
'register_finder', 'register_namespace_handler', 'register_loader_type',
|
||
'fixup_namespace_packages', 'get_importer',
|
||
|
||
# Warnings
|
||
'PkgResourcesDeprecationWarning',
|
||
|
||
# Deprecated/backward compatibility only
|
||
'run_main', 'AvailableDistributions',
|
||
]
|
||
|
||
|
||
class ResolutionError(Exception):
|
||
"""Abstract base for dependency resolution errors"""
|
||
|
||
def __repr__(self):
|
||
return self.__class__.__name__ + repr(self.args)
|
||
|
||
|
||
class VersionConflict(ResolutionError):
|
||
"""
|
||
An already-installed version conflicts with the requested version.
|
||
|
||
Should be initialized with the installed Distribution and the requested
|
||
Requirement.
|
||
"""
|
||
|
||
_template = "{self.dist} is installed but {self.req} is required"
|
||
|
||
@property
|
||
def dist(self):
|
||
return self.args[0]
|
||
|
||
@property
|
||
def req(self):
|
||
return self.args[1]
|
||
|
||
def report(self):
|
||
return self._template.format(**locals())
|
||
|
||
def with_context(self, required_by):
|
||
"""
|
||
If required_by is non-empty, return a version of self that is a
|
||
ContextualVersionConflict.
|
||
"""
|
||
if not required_by:
|
||
return self
|
||
args = self.args + (required_by,)
|
||
return ContextualVersionConflict(*args)
|
||
|
||
|
||
class ContextualVersionConflict(VersionConflict):
|
||
"""
|
||
A VersionConflict that accepts a third parameter, the set of the
|
||
requirements that required the installed Distribution.
|
||
"""
|
||
|
||
_template = VersionConflict._template + ' by {self.required_by}'
|
||
|
||
@property
|
||
def required_by(self):
|
||
return self.args[2]
|
||
|
||
|
||
class DistributionNotFound(ResolutionError):
|
||
"""A requested distribution was not found"""
|
||
|
||
_template = ("The '{self.req}' distribution was not found "
|
||
"and is required by {self.requirers_str}")
|
||
|
||
@property
|
||
def req(self):
|
||
return self.args[0]
|
||
|
||
@property
|
||
def requirers(self):
|
||
return self.args[1]
|
||
|
||
@property
|
||
def requirers_str(self):
|
||
if not self.requirers:
|
||
return 'the application'
|
||
return ', '.join(self.requirers)
|
||
|
||
def report(self):
|
||
return self._template.format(**locals())
|
||
|
||
def __str__(self):
|
||
return self.report()
|
||
|
||
|
||
class UnknownExtra(ResolutionError):
|
||
"""Distribution doesn't have an "extra feature" of the given name"""
|
||
|
||
|
||
_provider_factories = {}
|
||
|
||
PY_MAJOR = sys.version[:3]
|
||
EGG_DIST = 3
|
||
BINARY_DIST = 2
|
||
SOURCE_DIST = 1
|
||
CHECKOUT_DIST = 0
|
||
DEVELOP_DIST = -1
|
||
|
||
|
||
def register_loader_type(loader_type, provider_factory):
|
||
"""Register `provider_factory` to make providers for `loader_type`
|
||
|
||
`loader_type` is the type or class of a PEP 302 ``module.__loader__``,
|
||
and `provider_factory` is a function that, passed a *module* object,
|
||
returns an ``IResourceProvider`` for that module.
|
||
"""
|
||
_provider_factories[loader_type] = provider_factory
|
||
|
||
|
||
def get_provider(moduleOrReq):
|
||
"""Return an IResourceProvider for the named module or requirement"""
|
||
if isinstance(moduleOrReq, Requirement):
|
||
return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
|
||
try:
|
||
module = sys.modules[moduleOrReq]
|
||
except KeyError:
|
||
__import__(moduleOrReq)
|
||
module = sys.modules[moduleOrReq]
|
||
loader = getattr(module, '__loader__', None)
|
||
return _find_adapter(_provider_factories, loader)(module)
|
||
|
||
|
||
def _macosx_vers(_cache=[]):
|
||
if not _cache:
|
||
version = platform.mac_ver()[0]
|
||
# fallback for MacPorts
|
||
if version == '':
|
||
plist = '/System/Library/CoreServices/SystemVersion.plist'
|
||
if os.path.exists(plist):
|
||
if hasattr(plistlib, 'readPlist'):
|
||
plist_content = plistlib.readPlist(plist)
|
||
if 'ProductVersion' in plist_content:
|
||
version = plist_content['ProductVersion']
|
||
|
||
_cache.append(version.split('.'))
|
||
return _cache[0]
|
||
|
||
|
||
def _macosx_arch(machine):
|
||
return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
|
||
|
||
|
||
def get_build_platform():
|
||
"""Return this platform's string for platform-specific distributions
|
||
|
||
XXX Currently this is the same as ``distutils.util.get_platform()``, but it
|
||
needs some hacks for Linux and Mac OS X.
|
||
"""
|
||
from sysconfig import get_platform
|
||
|
||
plat = get_platform()
|
||
if sys.platform == "darwin" and not plat.startswith('macosx-'):
|
||
try:
|
||
version = _macosx_vers()
|
||
machine = os.uname()[4].replace(" ", "_")
|
||
return "macosx-%d.%d-%s" % (
|
||
int(version[0]), int(version[1]),
|
||
_macosx_arch(machine),
|
||
)
|
||
except ValueError:
|
||
# if someone is running a non-Mac darwin system, this will fall
|
||
# through to the default implementation
|
||
pass
|
||
return plat
|
||
|
||
|
||
macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
|
||
darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
|
||
# XXX backward compat
|
||
get_platform = get_build_platform
|
||
|
||
|
||
def compatible_platforms(provided, required):
|
||
"""Can code for the `provided` platform run on the `required` platform?
|
||
|
||
Returns true if either platform is ``None``, or the platforms are equal.
|
||
|
||
XXX Needs compatibility checks for Linux and other unixy OSes.
|
||
"""
|
||
if provided is None or required is None or provided == required:
|
||
# easy case
|
||
return True
|
||
|
||
# Mac OS X special cases
|
||
reqMac = macosVersionString.match(required)
|
||
if reqMac:
|
||
provMac = macosVersionString.match(provided)
|
||
|
||
# is this a Mac package?
|
||
if not provMac:
|
||
# this is backwards compatibility for packages built before
|
||
# setuptools 0.6. All packages built after this point will
|
||
# use the new macosx designation.
|
||
provDarwin = darwinVersionString.match(provided)
|
||
if provDarwin:
|
||
dversion = int(provDarwin.group(1))
|
||
macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
|
||
if dversion == 7 and macosversion >= "10.3" or \
|
||
dversion == 8 and macosversion >= "10.4":
|
||
return True
|
||
# egg isn't macosx or legacy darwin
|
||
return False
|
||
|
||
# are they the same major version and machine type?
|
||
if provMac.group(1) != reqMac.group(1) or \
|
||
provMac.group(3) != reqMac.group(3):
|
||
return False
|
||
|
||
# is the required OS major update >= the provided one?
|
||
if int(provMac.group(2)) > int(reqMac.group(2)):
|
||
return False
|
||
|
||
return True
|
||
|
||
# XXX Linux and other platforms' special cases should go here
|
||
return False
|
||
|
||
|
||
def run_script(dist_spec, script_name):
|
||
"""Locate distribution `dist_spec` and run its `script_name` script"""
|
||
ns = sys._getframe(1).f_globals
|
||
name = ns['__name__']
|
||
ns.clear()
|
||
ns['__name__'] = name
|
||
require(dist_spec)[0].run_script(script_name, ns)
|
||
|
||
|
||
# backward compatibility
|
||
run_main = run_script
|
||
|
||
|
||
def get_distribution(dist):
|
||
"""Return a current distribution object for a Requirement or string"""
|
||
if isinstance(dist, six.string_types):
|
||
dist = Requirement.parse(dist)
|
||
if isinstance(dist, Requirement):
|
||
dist = get_provider(dist)
|
||
if not isinstance(dist, Distribution):
|
||
raise TypeError("Expected string, Requirement, or Distribution", dist)
|
||
return dist
|
||
|
||
|
||
def load_entry_point(dist, group, name):
|
||
"""Return `name` entry point of `group` for `dist` or raise ImportError"""
|
||
return get_distribution(dist).load_entry_point(group, name)
|
||
|
||
|
||
def get_entry_map(dist, group=None):
|
||
"""Return the entry point map for `group`, or the full entry map"""
|
||
return get_distribution(dist).get_entry_map(group)
|
||
|
||
|
||
def get_entry_info(dist, group, name):
|
||
"""Return the EntryPoint object for `group`+`name`, or ``None``"""
|
||
return get_distribution(dist).get_entry_info(group, name)
|
||
|
||
|
||
class IMetadataProvider:
|
||
def has_metadata(name):
|
||
"""Does the package's distribution contain the named metadata?"""
|
||
|
||
def get_metadata(name):
|
||
"""The named metadata resource as a string"""
|
||
|
||
def get_metadata_lines(name):
|
||
"""Yield named metadata resource as list of non-blank non-comment lines
|
||
|
||
Leading and trailing whitespace is stripped from each line, and lines
|
||
with ``#`` as the first non-blank character are omitted."""
|
||
|
||
def metadata_isdir(name):
|
||
"""Is the named metadata a directory? (like ``os.path.isdir()``)"""
|
||
|
||
def metadata_listdir(name):
|
||
"""List of metadata names in the directory (like ``os.listdir()``)"""
|
||
|
||
def run_script(script_name, namespace):
|
||
"""Execute the named script in the supplied namespace dictionary"""
|
||
|
||
|
||
class IResourceProvider(IMetadataProvider):
|
||
"""An object that provides access to package resources"""
|
||
|
||
def get_resource_filename(manager, resource_name):
|
||
"""Return a true filesystem path for `resource_name`
|
||
|
||
`manager` must be an ``IResourceManager``"""
|
||
|
||
def get_resource_stream(manager, resource_name):
|
||
"""Return a readable file-like object for `resource_name`
|
||
|
||
`manager` must be an ``IResourceManager``"""
|
||
|
||
def get_resource_string(manager, resource_name):
|
||
"""Return a string containing the contents of `resource_name`
|
||
|
||
`manager` must be an ``IResourceManager``"""
|
||
|
||
def has_resource(resource_name):
|
||
"""Does the package contain the named resource?"""
|
||
|
||
def resource_isdir(resource_name):
|
||
"""Is the named resource a directory? (like ``os.path.isdir()``)"""
|
||
|
||
def resource_listdir(resource_name):
|
||
"""List of resource names in the directory (like ``os.listdir()``)"""
|
||
|
||
|
||
class WorkingSet:
|
||
"""A collection of active distributions on sys.path (or a similar list)"""
|
||
|
||
def __init__(self, entries=None):
|
||
"""Create working set from list of path entries (default=sys.path)"""
|
||
self.entries = []
|
||
self.entry_keys = {}
|
||
self.by_key = {}
|
||
self.callbacks = []
|
||
|
||
if entries is None:
|
||
entries = sys.path
|
||
|
||
for entry in entries:
|
||
self.add_entry(entry)
|
||
|
||
@classmethod
|
||
def _build_master(cls):
|
||
"""
|
||
Prepare the master working set.
|
||
"""
|
||
ws = cls()
|
||
try:
|
||
from __main__ import __requires__
|
||
except ImportError:
|
||
# The main program does not list any requirements
|
||
return ws
|
||
|
||
# ensure the requirements are met
|
||
try:
|
||
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
|
||
# by starting with an empty path
|
||
ws = cls([])
|
||
reqs = parse_requirements(req_spec)
|
||
dists = ws.resolve(reqs, Environment())
|
||
for dist in dists:
|
||
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)
|
||
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).
|
||
"""
|
||
return (
|
||
entry
|
||
for dist in self
|
||
for entry in dist.get_entry_map(group).values()
|
||
if name is None or name == entry.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, replace=replace)
|
||
|
||
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, extras=None):
|
||
"""List all distributions needed to (recursively) meet `requirements`
|
||
|
||
`requirements` must be a sequence of ``Requirement`` objects. `env`,
|
||
if supplied, should be an ``Environment`` instance. If
|
||
not supplied, it defaults to all distributions available within any
|
||
entry or distribution in the working set. `installer`, if supplied,
|
||
will be invoked with each requirement that cannot be met by an
|
||
already-installed distribution; it should return a ``Distribution`` or
|
||
``None``.
|
||
|
||
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.
|
||
|
||
`extras` is a list of the extras to be used with these requirements.
|
||
This is important because extra requirements may look like `my_req;
|
||
extra = "my_extra"`, which would otherwise be interpreted as a purely
|
||
optional requirement. Instead, we want to be able to assert that these
|
||
requirements are truly required.
|
||
"""
|
||
|
||
# set up the stack
|
||
requirements = list(requirements)[::-1]
|
||
# set of processed requirements
|
||
processed = {}
|
||
# key -> dist
|
||
best = {}
|
||
to_activate = []
|
||
|
||
req_extras = _ReqExtras()
|
||
|
||
# Mapping of requirement to set of distributions that required it;
|
||
# useful for reporting info about conflicts.
|
||
required_by = collections.defaultdict(set)
|
||
|
||
while requirements:
|
||
# process dependencies breadth-first
|
||
req = requirements.pop(0)
|
||
if req in processed:
|
||
# Ignore cyclic or redundant dependencies
|
||
continue
|
||
|
||
if not req_extras.markers_pass(req, extras):
|
||
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,
|
||
replace_conflicting=replace_conflicting
|
||
)
|
||
if dist is None:
|
||
requirers = required_by.get(req, None)
|
||
raise DistributionNotFound(req, requirers)
|
||
to_activate.append(dist)
|
||
if dist not in req:
|
||
# Oops, the "best" so far conflicts with a dependency
|
||
dependent_req = required_by[req]
|
||
raise VersionConflict(dist, req).with_context(dependent_req)
|
||
|
||
# push the new requirements onto the stack
|
||
new_requirements = dist.requires(req.extras)[::-1]
|
||
requirements.extend(new_requirements)
|
||
|
||
# Register the new requirements needed by req
|
||
for new_requirement in new_requirements:
|
||
required_by[new_requirement].add(req.project_name)
|
||
req_extras[new_requirement] = req.extras
|
||
|
||
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 as v:
|
||
# 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, existing=True):
|
||
"""Invoke `callback` for all distributions
|
||
|
||
If `existing=True` (default),
|
||
call on all existing ones, as well.
|
||
"""
|
||
if callback in self.callbacks:
|
||
return
|
||
self.callbacks.append(callback)
|
||
if not existing:
|
||
return
|
||
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 _ReqExtras(dict):
|
||
"""
|
||
Map each requirement to the extras that demanded it.
|
||
"""
|
||
|
||
def markers_pass(self, req, extras=None):
|
||
"""
|
||
Evaluate markers for req against each extra that
|
||
demanded it.
|
||
|
||
Return False if the req has a marker and fails
|
||
evaluation. Otherwise, return True.
|
||
"""
|
||
extra_evals = (
|
||
req.marker.evaluate({'extra': extra})
|
||
for extra in self.get(req, ()) + (extras or (None,))
|
||
)
|
||
return not req.marker or any(extra_evals)
|
||
|
||
|
||
class Environment:
|
||
"""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. ``'3.6'``);
|
||
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.
|
||
"""
|
||
py_compat = (
|
||
self.python is None
|
||
or dist.py_version is None
|
||
or dist.py_version == self.python
|
||
)
|
||
return py_compat 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, replace_conflicting=False):
|
||
"""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.
|
||
"""
|
||
try:
|
||
dist = working_set.find(req)
|
||
except VersionConflict:
|
||
if not replace_conflicting:
|
||
raise
|
||
dist = None
|
||
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()
|
||
|
||
tmpl = textwrap.dedent("""
|
||
Can't extract file(s) to egg cache
|
||
|
||
The following error occurred while trying to extract file(s)
|
||
to the Python egg cache:
|
||
|
||
{old_exc}
|
||
|
||
The Python egg cache directory is currently set to:
|
||
|
||
{cache_path}
|
||
|
||
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.
|
||
""").lstrip()
|
||
err = ExtractionError(tmpl.format(**locals()))
|
||
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 Exception:
|
||
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():
|
||
"""
|
||
Return the ``PYTHON_EGG_CACHE`` environment variable
|
||
or a platform-relevant user cache dir for an app
|
||
named "Python-Eggs".
|
||
"""
|
||
return (
|
||
os.environ.get('PYTHON_EGG_CACHE')
|
||
or appdirs.user_cache_dir(appname='Python-Eggs')
|
||
)
|
||
|
||
|
||
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
|
||
"""
|
||
try:
|
||
# normalize the version
|
||
return str(packaging.version.Version(version))
|
||
except packaging.version.InvalidVersion:
|
||
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('-', '_')
|
||
|
||
|
||
def invalid_marker(text):
|
||
"""
|
||
Validate text as a PEP 508 environment marker; return an exception
|
||
if invalid or False otherwise.
|
||
"""
|
||
try:
|
||
evaluate_marker(text)
|
||
except SyntaxError as e:
|
||
e.filename = None
|
||
e.lineno = None
|
||
return e
|
||
return False
|
||
|
||
|
||
def evaluate_marker(text, extra=None):
|
||
"""
|
||
Evaluate a PEP 508 environment marker.
|
||
Return a boolean indicating the marker result in this environment.
|
||
Raise SyntaxError if marker is invalid.
|
||
|
||
This implementation uses the 'pyparsing' module.
|
||
"""
|
||
try:
|
||
marker = packaging.markers.Marker(text)
|
||
return marker.evaluate()
|
||
except packaging.markers.InvalidMarker as e:
|
||
raise SyntaxError(e)
|
||
|
||
|
||
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 _get_metadata_path(self, name):
|
||
return self._fn(self.egg_info, name)
|
||
|
||
def has_metadata(self, name):
|
||
if not self.egg_info:
|
||
return self.egg_info
|
||
|
||
path = self._get_metadata_path(name)
|
||
return self._has(path)
|
||
|
||
def get_metadata(self, name):
|
||
if not self.egg_info:
|
||
return ""
|
||
path = self._get_metadata_path(name)
|
||
value = self._get(path)
|
||
if six.PY2:
|
||
return value
|
||
try:
|
||
return value.decode('utf-8')
|
||
except UnicodeDecodeError as exc:
|
||
# Include the path in the error message to simplify
|
||
# troubleshooting, and without changing the exception type.
|
||
exc.reason += ' in {} file at path: {}'.format(name, path)
|
||
raise
|
||
|
||
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(
|
||
"Script {script!r} not found in metadata at {self.egg_info!r}"
|
||
.format(**locals()),
|
||
)
|
||
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):
|
||
self._validate_resource_path(resource_name)
|
||
if resource_name:
|
||
return os.path.join(base, *resource_name.split('/'))
|
||
return base
|
||
|
||
@staticmethod
|
||
def _validate_resource_path(path):
|
||
"""
|
||
Validate the resource paths according to the docs.
|
||
https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
|
||
|
||
>>> warned = getfixture('recwarn')
|
||
>>> warnings.simplefilter('always')
|
||
>>> vrp = NullProvider._validate_resource_path
|
||
>>> vrp('foo/bar.txt')
|
||
>>> bool(warned)
|
||
False
|
||
>>> vrp('../foo/bar.txt')
|
||
>>> bool(warned)
|
||
True
|
||
>>> warned.clear()
|
||
>>> vrp('/foo/bar.txt')
|
||
>>> bool(warned)
|
||
True
|
||
>>> vrp('foo/../../bar.txt')
|
||
>>> bool(warned)
|
||
True
|
||
>>> warned.clear()
|
||
>>> vrp('foo/f../bar.txt')
|
||
>>> bool(warned)
|
||
False
|
||
|
||
Windows path separators are straight-up disallowed.
|
||
>>> vrp(r'\\foo/bar.txt')
|
||
Traceback (most recent call last):
|
||
...
|
||
ValueError: Use of .. or absolute path in a resource path \
|
||
is not allowed.
|
||
|
||
>>> vrp(r'C:\\foo/bar.txt')
|
||
Traceback (most recent call last):
|
||
...
|
||
ValueError: Use of .. or absolute path in a resource path \
|
||
is not allowed.
|
||
|
||
Blank values are allowed
|
||
|
||
>>> vrp('')
|
||
>>> bool(warned)
|
||
False
|
||
|
||
Non-string values are not.
|
||
|
||
>>> vrp(None)
|
||
Traceback (most recent call last):
|
||
...
|
||
AttributeError: ...
|
||
"""
|
||
invalid = (
|
||
os.path.pardir in path.split(posixpath.sep) or
|
||
posixpath.isabs(path) or
|
||
ntpath.isabs(path)
|
||
)
|
||
if not invalid:
|
||
return
|
||
|
||
msg = "Use of .. or absolute path in a resource path is not allowed."
|
||
|
||
# Aggressively disallow Windows absolute paths
|
||
if ntpath.isabs(path) and not posixpath.isabs(path):
|
||
raise ValueError(msg)
|
||
|
||
# for compatibility, warn; in future
|
||
# raise ValueError(msg)
|
||
warnings.warn(
|
||
msg[:-1] + " and will raise exceptions in a future release.",
|
||
DeprecationWarning,
|
||
stacklevel=4,
|
||
)
|
||
|
||
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 _is_egg_path(path):
|
||
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()
|
||
|
||
@classmethod
|
||
def _register(cls):
|
||
loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
|
||
for name in loader_names:
|
||
loader_cls = getattr(importlib_machinery, name, type(None))
|
||
register_loader_type(loader_cls, cls)
|
||
|
||
|
||
DefaultProvider._register()
|
||
|
||
|
||
class EmptyProvider(NullProvider):
|
||
"""Provider that returns nothing for all requests"""
|
||
|
||
module_path = None
|
||
|
||
_isdir = _has = lambda self, path: False
|
||
|
||
def _get(self, path):
|
||
return ''
|
||
|
||
def _listdir(self, path):
|
||
return []
|
||
|
||
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 zipfile.ZipFile(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 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
|
||
fspath = fspath.rstrip(os.sep)
|
||
if fspath == self.loader.archive:
|
||
return ''
|
||
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 _get_metadata_path(self, name):
|
||
return self.path
|
||
|
||
def has_metadata(self, name):
|
||
return name == 'PKG-INFO' and os.path.isfile(self.path)
|
||
|
||
def get_metadata(self, name):
|
||
if name != 'PKG-INFO':
|
||
raise KeyError("No metadata except PKG-INFO is available")
|
||
|
||
with io.open(self.path, encoding='utf-8', errors="replace") as f:
|
||
metadata = f.read()
|
||
self._warn_on_replacement(metadata)
|
||
return metadata
|
||
|
||
def _warn_on_replacement(self, metadata):
|
||
# Python 2.7 compat for: replacement_char = '<27>'
|
||
replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
|
||
if replacement_char in metadata:
|
||
tmpl = "{self.path} could not be properly decoded in UTF-8"
|
||
msg = tmpl.format(**locals())
|
||
warnings.warn(msg)
|
||
|
||
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 _is_egg_path(subitem):
|
||
subpath = os.path.join(path_item, subitem)
|
||
dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
|
||
for dist in dists:
|
||
yield dist
|
||
elif subitem.lower().endswith('.dist-info'):
|
||
subpath = os.path.join(path_item, subitem)
|
||
submeta = EggMetadata(zipimport.zipimporter(subpath))
|
||
submeta.egg_info = subpath
|
||
yield Distribution.from_location(path_item, subitem, submeta)
|
||
|
||
|
||
register_finder(zipimport.zipimporter, find_eggs_in_zip)
|
||
|
||
|
||
def find_nothing(importer, path_item, only=False):
|
||
return ()
|
||
|
||
|
||
register_finder(object, find_nothing)
|
||
|
||
|
||
def _by_version_descending(names):
|
||
"""
|
||
Given a list of filenames, return them in descending order
|
||
by version number.
|
||
|
||
>>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
|
||
>>> _by_version_descending(names)
|
||
['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
|
||
>>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
|
||
>>> _by_version_descending(names)
|
||
['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
|
||
>>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
|
||
>>> _by_version_descending(names)
|
||
['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
|
||
"""
|
||
def _by_version(name):
|
||
"""
|
||
Parse each component of the filename
|
||
"""
|
||
name, ext = os.path.splitext(name)
|
||
parts = itertools.chain(name.split('-'), [ext])
|
||
return [packaging.version.parse(part) for part in parts]
|
||
|
||
return sorted(names, key=_by_version, reverse=True)
|
||
|
||
|
||
def find_on_path(importer, path_item, only=False):
|
||
"""Yield distributions accessible on a sys.path directory"""
|
||
path_item = _normalize_cached(path_item)
|
||
|
||
if _is_unpacked_egg(path_item):
|
||
yield Distribution.from_filename(
|
||
path_item, metadata=PathMetadata(
|
||
path_item, os.path.join(path_item, 'EGG-INFO')
|
||
)
|
||
)
|
||
return
|
||
|
||
entries = safe_listdir(path_item)
|
||
|
||
# for performance, before sorting by version,
|
||
# screen entries for only those that will yield
|
||
# distributions
|
||
filtered = (
|
||
entry
|
||
for entry in entries
|
||
if dist_factory(path_item, entry, only)
|
||
)
|
||
|
||
# scan for .egg and .egg-info in directory
|
||
path_item_entries = _by_version_descending(filtered)
|
||
for entry in path_item_entries:
|
||
fullpath = os.path.join(path_item, entry)
|
||
factory = dist_factory(path_item, entry, only)
|
||
for dist in factory(fullpath):
|
||
yield dist
|
||
|
||
|
||
def dist_factory(path_item, entry, only):
|
||
"""
|
||
Return a dist_factory for a path_item and entry
|
||
"""
|
||
lower = entry.lower()
|
||
is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
|
||
return (
|
||
distributions_from_metadata
|
||
if is_meta else
|
||
find_distributions
|
||
if not only and _is_egg_path(entry) else
|
||
resolve_egg_link
|
||
if not only and lower.endswith('.egg-link') else
|
||
NoDists()
|
||
)
|
||
|
||
|
||
class NoDists:
|
||
"""
|
||
>>> bool(NoDists())
|
||
False
|
||
|
||
>>> list(NoDists()('anything'))
|
||
[]
|
||
"""
|
||
def __bool__(self):
|
||
return False
|
||
if six.PY2:
|
||
__nonzero__ = __bool__
|
||
|
||
def __call__(self, fullpath):
|
||
return iter(())
|
||
|
||
|
||
def safe_listdir(path):
|
||
"""
|
||
Attempt to list contents of path, but suppress some exceptions.
|
||
"""
|
||
try:
|
||
return os.listdir(path)
|
||
except (PermissionError, NotADirectoryError):
|
||
pass
|
||
except OSError as e:
|
||
# Ignore the directory if does not exist, not a directory or
|
||
# permission denied
|
||
ignorable = (
|
||
e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
|
||
# Python 2 on Windows needs to be handled this way :(
|
||
or getattr(e, "winerror", None) == 267
|
||
)
|
||
if not ignorable:
|
||
raise
|
||
return ()
|
||
|
||
|
||
def distributions_from_metadata(path):
|
||
root = os.path.dirname(path)
|
||
if os.path.isdir(path):
|
||
if len(os.listdir(path)) == 0:
|
||
# empty metadata dir; skip
|
||
return
|
||
metadata = PathMetadata(root, path)
|
||
else:
|
||
metadata = FileMetadata(path)
|
||
entry = os.path.basename(path)
|
||
yield Distribution.from_location(
|
||
root, entry, metadata, precedence=DEVELOP_DIST,
|
||
)
|
||
|
||
|
||
def non_empty_lines(path):
|
||
"""
|
||
Yield non-empty lines from file at path
|
||
"""
|
||
with open(path) as f:
|
||
for line in f:
|
||
line = line.strip()
|
||
if line:
|
||
yield line
|
||
|
||
|
||
def resolve_egg_link(path):
|
||
"""
|
||
Given a path to an .egg-link, resolve distributions
|
||
present in the referenced path.
|
||
"""
|
||
referenced_paths = non_empty_lines(path)
|
||
resolved_paths = (
|
||
os.path.join(os.path.dirname(path), ref)
|
||
for ref in referenced_paths
|
||
)
|
||
dist_groups = map(find_distributions, resolved_paths)
|
||
return next(dist_groups, ())
|
||
|
||
|
||
register_finder(pkgutil.ImpImporter, find_on_path)
|
||
|
||
if hasattr(importlib_machinery, 'FileFinder'):
|
||
register_finder(importlib_machinery.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
|
||
|
||
# capture warnings due to #1111
|
||
with warnings.catch_warnings():
|
||
warnings.simplefilter("ignore")
|
||
loader = importer.find_module(packageName)
|
||
|
||
if loader is None:
|
||
return None
|
||
module = sys.modules.get(packageName)
|
||
if module is None:
|
||
module = sys.modules[packageName] = types.ModuleType(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)
|
||
_rebuild_mod_path(path, packageName, module)
|
||
return subpath
|
||
|
||
|
||
def _rebuild_mod_path(orig_path, package_name, module):
|
||
"""
|
||
Rebuild module.__path__ ensuring that all entries are ordered
|
||
corresponding to their sys.path order
|
||
"""
|
||
sys_path = [_normalize_cached(p) for p in sys.path]
|
||
|
||
def safe_sys_path_index(entry):
|
||
"""
|
||
Workaround for #520 and #513.
|
||
"""
|
||
try:
|
||
return sys_path.index(entry)
|
||
except ValueError:
|
||
return float('inf')
|
||
|
||
def position_in_sys_path(path):
|
||
"""
|
||
Return the ordinal of the path based on its position in sys.path
|
||
"""
|
||
path_parts = path.split(os.sep)
|
||
module_parts = package_name.count('.') + 1
|
||
parts = path_parts[:-module_parts]
|
||
return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
|
||
|
||
new_path = sorted(orig_path, key=position_in_sys_path)
|
||
new_path = [_normalize_cached(p) for p in new_path]
|
||
|
||
if isinstance(module.__path__, list):
|
||
module.__path__[:] = new_path
|
||
else:
|
||
module.__path__ = new_path
|
||
|
||
|
||
def declare_namespace(packageName):
|
||
"""Declare that package 'packageName' is a namespace package"""
|
||
|
||
_imp.acquire_lock()
|
||
try:
|
||
if packageName in _namespace_packages:
|
||
return
|
||
|
||
path = sys.path
|
||
parent, _, _ = packageName.rpartition('.')
|
||
|
||
if parent:
|
||
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 or None, []).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 hasattr(importlib_machinery, 'FileFinder'):
|
||
register_namespace_handler(importlib_machinery.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(os.path.normpath(_cygwin_patch(filename))))
|
||
|
||
|
||
def _cygwin_patch(filename): # pragma: nocover
|
||
"""
|
||
Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
|
||
symlink components. Using
|
||
os.path.abspath() works around this limitation. A fix in os.getcwd()
|
||
would probably better, in Cygwin even more so, except
|
||
that this seems to be by design...
|
||
"""
|
||
return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
|
||
|
||
|
||
def _normalize_cached(filename, _cache={}):
|
||
try:
|
||
return _cache[filename]
|
||
except KeyError:
|
||
_cache[filename] = result = normalize_path(filename)
|
||
return result
|
||
|
||
|
||
def _is_egg_path(path):
|
||
"""
|
||
Determine if given path appears to be an egg.
|
||
"""
|
||
return path.lower().endswith('.egg')
|
||
|
||
|
||
def _is_unpacked_egg(path):
|
||
"""
|
||
Determine if given path appears to be an unpacked egg.
|
||
"""
|
||
return (
|
||
_is_egg_path(path) and
|
||
os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
|
||
)
|
||
|
||
|
||
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, six.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
|
||
|
||
|
||
MODULE = re.compile(r"\w+(\.\w+)*$").match
|
||
EGG_NAME = re.compile(
|
||
r"""
|
||
(?P<name>[^-]+) (
|
||
-(?P<ver>[^-]+) (
|
||
-py(?P<pyver>[^-]+) (
|
||
-(?P<plat>.+)
|
||
)?
|
||
)?
|
||
)?
|
||
""",
|
||
re.VERBOSE | re.IGNORECASE,
|
||
).match
|
||
|
||
|
||
class EntryPoint:
|
||
"""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 = tuple(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, *args, **kwargs):
|
||
"""
|
||
Require packages for this EntryPoint, then resolve it.
|
||
"""
|
||
if not require or args or kwargs:
|
||
warnings.warn(
|
||
"Parameters to load are deprecated. Call .resolve and "
|
||
".require separately.",
|
||
PkgResourcesDeprecationWarning,
|
||
stacklevel=2,
|
||
)
|
||
if require:
|
||
self.require(*args, **kwargs)
|
||
return self.resolve()
|
||
|
||
def resolve(self):
|
||
"""
|
||
Resolve the entry point from its module and attrs.
|
||
"""
|
||
module = __import__(self.module_name, fromlist=['__name__'], level=0)
|
||
try:
|
||
return functools.reduce(getattr, self.attrs, module)
|
||
except AttributeError as exc:
|
||
raise ImportError(str(exc))
|
||
|
||
def require(self, env=None, installer=None):
|
||
if self.extras and not self.dist:
|
||
raise UnknownExtra("Can't require() without a distribution", self)
|
||
|
||
# Get the requirements for this entry point with all its extras and
|
||
# then resolve them. We have to pass `extras` along when resolving so
|
||
# that the working set knows what extras we want. Otherwise, for
|
||
# dist-info distributions, the working set will assume that the
|
||
# requirements for that extra are purely optional and skip over them.
|
||
reqs = self.dist.requires(self.extras)
|
||
items = working_set.resolve(reqs, env, installer, extras=self.extras)
|
||
list(map(working_set.add, items))
|
||
|
||
pattern = re.compile(
|
||
r'\s*'
|
||
r'(?P<name>.+?)\s*'
|
||
r'=\s*'
|
||
r'(?P<module>[\w.]+)\s*'
|
||
r'(:\s*(?P<attr>[\w.]+))?\s*'
|
||
r'(?P<extras>\[.*\])?\s*$'
|
||
)
|
||
|
||
@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
|
||
"""
|
||
m = cls.pattern.match(src)
|
||
if not m:
|
||
msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
|
||
raise ValueError(msg, src)
|
||
res = m.groupdict()
|
||
extras = cls._parse_extras(res['extras'])
|
||
attrs = res['attr'].split('.') if res['attr'] else ()
|
||
return cls(res['name'], res['module'], attrs, extras, dist)
|
||
|
||
@classmethod
|
||
def _parse_extras(cls, extras_spec):
|
||
if not extras_spec:
|
||
return ()
|
||
req = Requirement.parse('x' + extras_spec)
|
||
if req.specs:
|
||
raise ValueError()
|
||
return req.extras
|
||
|
||
@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 = urllib.parse.urlparse(location)
|
||
if parsed[-1].startswith('md5='):
|
||
return urllib.parse.urlunparse(parsed[:-1] + ('',))
|
||
return location
|
||
|
||
|
||
def _version_from_file(lines):
|
||
"""
|
||
Given an iterable of lines from a Metadata file, return
|
||
the value of the Version field, if present, or None otherwise.
|
||
"""
|
||
def is_version_line(line):
|
||
return line.lower().startswith('version:')
|
||
version_lines = filter(is_version_line, lines)
|
||
line = next(iter(version_lines), '')
|
||
_, _, value = line.partition(':')
|
||
return safe_version(value.strip()) or None
|
||
|
||
|
||
class Distribution:
|
||
"""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:
|
||
cls = _distributionImpl[ext.lower()]
|
||
|
||
match = EGG_NAME(basename)
|
||
if match:
|
||
project_name, version, py_version, platform = match.group(
|
||
'name', 'ver', 'pyver', 'plat'
|
||
)
|
||
return cls(
|
||
location, metadata, project_name=project_name, version=version,
|
||
py_version=py_version, platform=platform, **kw
|
||
)._reload_version()
|
||
|
||
def _reload_version(self):
|
||
return self
|
||
|
||
@property
|
||
def hashcmp(self):
|
||
return (
|
||
self.parsed_version,
|
||
self.precedence,
|
||
self.key,
|
||
_remove_md5_fragment(self.location),
|
||
self.py_version or '',
|
||
self.platform or '',
|
||
)
|
||
|
||
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):
|
||
if not hasattr(self, "_parsed_version"):
|
||
self._parsed_version = parse_version(self.version)
|
||
|
||
return self._parsed_version
|
||
|
||
def _warn_legacy_version(self):
|
||
LV = packaging.version.LegacyVersion
|
||
is_legacy = isinstance(self._parsed_version, LV)
|
||
if not is_legacy:
|
||
return
|
||
|
||
# While an empty version is technically a legacy version and
|
||
# is not a valid PEP 440 version, it's also unlikely to
|
||
# actually come from someone and instead it is more likely that
|
||
# it comes from setuptools attempting to parse a filename and
|
||
# including it in the list. So for that we'll gate this warning
|
||
# on if the version is anything at all or not.
|
||
if not self.version:
|
||
return
|
||
|
||
tmpl = textwrap.dedent("""
|
||
'{project_name} ({version})' is being parsed as a legacy,
|
||
non PEP 440,
|
||
version. You may find odd behavior and sort order.
|
||
In particular it will be sorted as less than 0.0. It
|
||
is recommended to migrate to PEP 440 compatible
|
||
versions.
|
||
""").strip().replace('\n', ' ')
|
||
|
||
warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
|
||
|
||
@property
|
||
def version(self):
|
||
try:
|
||
return self._version
|
||
except AttributeError:
|
||
version = self._get_version()
|
||
if version is None:
|
||
path = self._get_metadata_path_for_display(self.PKG_INFO)
|
||
msg = (
|
||
"Missing 'Version:' header and/or {} file at path: {}"
|
||
).format(self.PKG_INFO, path)
|
||
raise ValueError(msg, self)
|
||
|
||
return version
|
||
|
||
@property
|
||
def _dep_map(self):
|
||
"""
|
||
A map of extra to its list of (direct) requirements
|
||
for this distribution, including the null extra.
|
||
"""
|
||
try:
|
||
return self.__dep_map
|
||
except AttributeError:
|
||
self.__dep_map = self._filter_extras(self._build_dep_map())
|
||
return self.__dep_map
|
||
|
||
@staticmethod
|
||
def _filter_extras(dm):
|
||
"""
|
||
Given a mapping of extras to dependencies, strip off
|
||
environment markers and filter out any dependencies
|
||
not matching the markers.
|
||
"""
|
||
for extra in list(filter(None, dm)):
|
||
new_extra = extra
|
||
reqs = dm.pop(extra)
|
||
new_extra, _, marker = extra.partition(':')
|
||
fails_marker = marker and (
|
||
invalid_marker(marker)
|
||
or not evaluate_marker(marker)
|
||
)
|
||
if fails_marker:
|
||
reqs = []
|
||
new_extra = safe_extra(new_extra) or None
|
||
|
||
dm.setdefault(new_extra, []).extend(reqs)
|
||
return dm
|
||
|
||
def _build_dep_map(self):
|
||
dm = {}
|
||
for name in 'requires.txt', 'depends.txt':
|
||
for extra, reqs in split_sections(self._get_metadata(name)):
|
||
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_path_for_display(self, name):
|
||
"""
|
||
Return the path to the given metadata file, if available.
|
||
"""
|
||
try:
|
||
# We need to access _get_metadata_path() on the provider object
|
||
# directly rather than through this class's __getattr__()
|
||
# since _get_metadata_path() is marked private.
|
||
path = self._provider._get_metadata_path(name)
|
||
|
||
# Handle exceptions e.g. in case the distribution's metadata
|
||
# provider doesn't support _get_metadata_path().
|
||
except Exception:
|
||
return '[could not detect]'
|
||
|
||
return path
|
||
|
||
def _get_metadata(self, name):
|
||
if self.has_metadata(name):
|
||
for line in self.get_metadata_lines(name):
|
||
yield line
|
||
|
||
def _get_version(self):
|
||
lines = self._get_metadata(self.PKG_INFO)
|
||
version = _version_from_file(lines)
|
||
|
||
return version
|
||
|
||
def activate(self, path=None, replace=False):
|
||
"""Ensure distribution is importable on `path` (default=sys.path)"""
|
||
if path is None:
|
||
path = sys.path
|
||
self.insert_on(path, replace=replace)
|
||
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)
|
||
|
||
def __dir__(self):
|
||
return list(
|
||
set(super(Distribution, self).__dir__())
|
||
| set(
|
||
attr for attr in self._provider.__dir__()
|
||
if not attr.startswith('_')
|
||
)
|
||
)
|
||
|
||
if not hasattr(object, '__dir__'):
|
||
# python 2.7 not supported
|
||
del __dir__
|
||
|
||
@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"""
|
||
if isinstance(self.parsed_version, packaging.version.Version):
|
||
spec = "%s==%s" % (self.project_name, self.parsed_version)
|
||
else:
|
||
spec = "%s===%s" % (self.project_name, self.parsed_version)
|
||
|
||
return Requirement.parse(spec)
|
||
|
||
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, replace=False):
|
||
"""Ensure self.location is on path
|
||
|
||
If replace=False (default):
|
||
- If location is already in path anywhere, do nothing.
|
||
- Else:
|
||
- If it's an egg and its parent directory is on path,
|
||
insert just ahead of the parent.
|
||
- Else: add to the end of path.
|
||
If replace=True:
|
||
- If location is already on path anywhere (not eggs)
|
||
or higher priority than its parent (eggs)
|
||
do nothing.
|
||
- Else:
|
||
- If it's an egg and its parent directory is on path,
|
||
insert just ahead of the parent,
|
||
removing any lower-priority entries.
|
||
- Else: add it to the front of path.
|
||
"""
|
||
|
||
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:
|
||
if replace:
|
||
break
|
||
else:
|
||
# don't modify path (even removing duplicates) if
|
||
# found and not replace
|
||
return
|
||
elif item == bdir and self.precedence == EGG_DIST:
|
||
# if it's an .egg, give it precedence over its directory
|
||
# UNLESS it's already been added to sys.path and replace=False
|
||
if (not replace) and nloc in npath[p:]:
|
||
return
|
||
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()
|
||
if replace:
|
||
path.insert(0, loc)
|
||
else:
|
||
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 EggInfoDistribution(Distribution):
|
||
def _reload_version(self):
|
||
"""
|
||
Packages installed by distutils (e.g. numpy or scipy),
|
||
which uses an old safe_version, and so
|
||
their version numbers can get mangled when
|
||
converted to filenames (e.g., 1.11.0.dev0+2329eae to
|
||
1.11.0.dev0_2329eae). These distributions will not be
|
||
parsed properly
|
||
downstream by Distribution and safe_version, so
|
||
take an extra step and try to get the version number from
|
||
the metadata file itself instead of the filename.
|
||
"""
|
||
md_version = self._get_version()
|
||
if md_version:
|
||
self._version = md_version
|
||
return self
|
||
|
||
|
||
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 _compute_dependencies(self):
|
||
"""Recompute this distribution's dependencies."""
|
||
dm = self.__dep_map = {None: []}
|
||
|
||
reqs = []
|
||
# Including any condition expressions
|
||
for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
|
||
reqs.extend(parse_requirements(req))
|
||
|
||
def reqs_for_extra(extra):
|
||
for req in reqs:
|
||
if not req.marker or req.marker.evaluate({'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 []:
|
||
s_extra = safe_extra(extra.strip())
|
||
dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
|
||
|
||
return dm
|
||
|
||
|
||
_distributionImpl = {
|
||
'.egg': Distribution,
|
||
'.egg-info': EggInfoDistribution,
|
||
'.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)
|
||
|
||
|
||
class RequirementParseError(ValueError):
|
||
def __str__(self):
|
||
return ' '.join(self.args)
|
||
|
||
|
||
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))
|
||
|
||
for line in lines:
|
||
# Drop comments -- a hash without a space may be in a URL.
|
||
if ' #' in line:
|
||
line = line[:line.find(' #')]
|
||
# If there is a line continuation, drop it, and append the next line.
|
||
if line.endswith('\\'):
|
||
line = line[:-2].strip()
|
||
try:
|
||
line += next(lines)
|
||
except StopIteration:
|
||
return
|
||
yield Requirement(line)
|
||
|
||
|
||
class Requirement(packaging.requirements.Requirement):
|
||
def __init__(self, requirement_string):
|
||
"""DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
|
||
try:
|
||
super(Requirement, self).__init__(requirement_string)
|
||
except packaging.requirements.InvalidRequirement as e:
|
||
raise RequirementParseError(str(e))
|
||
self.unsafe_name = self.name
|
||
project_name = safe_name(self.name)
|
||
self.project_name, self.key = project_name, project_name.lower()
|
||
self.specs = [
|
||
(spec.operator, spec.version) for spec in self.specifier]
|
||
self.extras = tuple(map(safe_extra, self.extras))
|
||
self.hashCmp = (
|
||
self.key,
|
||
self.specifier,
|
||
frozenset(self.extras),
|
||
str(self.marker) if self.marker else None,
|
||
)
|
||
self.__hash = hash(self.hashCmp)
|
||
|
||
def __eq__(self, other):
|
||
return (
|
||
isinstance(other, Requirement) and
|
||
self.hashCmp == other.hashCmp
|
||
)
|
||
|
||
def __ne__(self, other):
|
||
return not self == other
|
||
|
||
def __contains__(self, item):
|
||
if isinstance(item, Distribution):
|
||
if item.key != self.key:
|
||
return False
|
||
|
||
item = item.version
|
||
|
||
# Allow prereleases always in order to match the previous behavior of
|
||
# this method. In the future this should be smarter and follow PEP 440
|
||
# more accurately.
|
||
return self.specifier.contains(item, prereleases=True)
|
||
|
||
def __hash__(self):
|
||
return self.__hash
|
||
|
||
def __repr__(self):
|
||
return "Requirement.parse(%r)" % str(self)
|
||
|
||
@staticmethod
|
||
def parse(s):
|
||
req, = parse_requirements(s)
|
||
return req
|
||
|
||
|
||
def _always_object(classes):
|
||
"""
|
||
Ensure object appears in the mro even
|
||
for old-style classes.
|
||
"""
|
||
if object not in classes:
|
||
return classes + (object,)
|
||
return classes
|
||
|
||
|
||
def _find_adapter(registry, ob):
|
||
"""Return an adapter factory for `ob` from `registry`"""
|
||
types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
|
||
for t in types:
|
||
if t in registry:
|
||
return registry[t]
|
||
|
||
|
||
def ensure_directory(path):
|
||
"""Ensure that the parent directory of `path` exists"""
|
||
dirname = os.path.dirname(path)
|
||
py31compat.makedirs(dirname, exist_ok=True)
|
||
|
||
|
||
def _bypass_ensure_directory(path):
|
||
"""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)
|
||
try:
|
||
mkdir(dirname, 0o755)
|
||
except FileExistsError:
|
||
pass
|
||
|
||
|
||
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
|
||
|
||
|
||
# Silence the PEP440Warning by default, so that end users don't get hit by it
|
||
# randomly just because they use pkg_resources. We want to append the rule
|
||
# because we want earlier uses of filterwarnings to take precedence over this
|
||
# one.
|
||
warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
|
||
|
||
|
||
# from jaraco.functools 1.3
|
||
def _call_aside(f, *args, **kwargs):
|
||
f(*args, **kwargs)
|
||
return f
|
||
|
||
|
||
@_call_aside
|
||
def _initialize(g=globals()):
|
||
"Set up global resource manager (deliberately not state-saved)"
|
||
manager = ResourceManager()
|
||
g['_manager'] = manager
|
||
g.update(
|
||
(name, getattr(manager, name))
|
||
for name in dir(manager)
|
||
if not name.startswith('_')
|
||
)
|
||
|
||
|
||
@_call_aside
|
||
def _initialize_master_working_set():
|
||
"""
|
||
Prepare the master working set and make the ``require()``
|
||
API available.
|
||
|
||
This function has explicit effects on the global state
|
||
of pkg_resources. It is intended to be invoked once at
|
||
the initialization of this module.
|
||
|
||
Invocation by other packages is unsupported and done
|
||
at their own risk.
|
||
"""
|
||
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 with replace=False and
|
||
# ensure that all distributions added to the working set in the future
|
||
# (e.g. by calling ``require()``) will get activated as well,
|
||
# with higher priority (replace=True).
|
||
tuple(
|
||
dist.activate(replace=False)
|
||
for dist in working_set
|
||
)
|
||
add_activation_listener(
|
||
lambda dist: dist.activate(replace=True),
|
||
existing=False,
|
||
)
|
||
working_set.entries = []
|
||
# match order
|
||
list(map(working_set.add_entry, sys.path))
|
||
globals().update(locals())
|
||
|
||
class PkgResourcesDeprecationWarning(Warning):
|
||
"""
|
||
Base class for warning about deprecations in ``pkg_resources``
|
||
|
||
This class is not derived from ``DeprecationWarning``, and as such is
|
||
visible by default.
|
||
"""
|