From 68df54d6629ec019142eb149dd037774f2d11e7c Mon Sep 17 00:00:00 2001 From: Shubham Saini Date: Tue, 11 Dec 2018 15:31:23 +0530 Subject: First commit --- .../pip/_vendor/distlib/resources.py | 355 +++++++++++++++++++++ 1 file changed, 355 insertions(+) create mode 100644 venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/distlib/resources.py (limited to 'venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/distlib/resources.py') diff --git a/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/distlib/resources.py b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/distlib/resources.py new file mode 100644 index 0000000..cd618a6 --- /dev/null +++ b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/distlib/resources.py @@ -0,0 +1,355 @@ +# -*- coding: utf-8 -*- +# +# Copyright (C) 2013-2017 Vinay Sajip. +# Licensed to the Python Software Foundation under a contributor agreement. +# See LICENSE.txt and CONTRIBUTORS.txt. +# +from __future__ import unicode_literals + +import bisect +import io +import logging +import os +import pkgutil +import shutil +import sys +import types +import zipimport + +from . import DistlibException +from .util import cached_property, get_cache_base, path_to_cache_dir, Cache + +logger = logging.getLogger(__name__) + + +cache = None # created when needed + + +class ResourceCache(Cache): + def __init__(self, base=None): + if base is None: + # Use native string to avoid issues on 2.x: see Python #20140. + base = os.path.join(get_cache_base(), str('resource-cache')) + super(ResourceCache, self).__init__(base) + + def is_stale(self, resource, path): + """ + Is the cache stale for the given resource? + + :param resource: The :class:`Resource` being cached. + :param path: The path of the resource in the cache. + :return: True if the cache is stale. + """ + # Cache invalidation is a hard problem :-) + return True + + def get(self, resource): + """ + Get a resource into the cache, + + :param resource: A :class:`Resource` instance. + :return: The pathname of the resource in the cache. + """ + prefix, path = resource.finder.get_cache_info(resource) + if prefix is None: + result = path + else: + result = os.path.join(self.base, self.prefix_to_dir(prefix), path) + dirname = os.path.dirname(result) + if not os.path.isdir(dirname): + os.makedirs(dirname) + if not os.path.exists(result): + stale = True + else: + stale = self.is_stale(resource, path) + if stale: + # write the bytes of the resource to the cache location + with open(result, 'wb') as f: + f.write(resource.bytes) + return result + + +class ResourceBase(object): + def __init__(self, finder, name): + self.finder = finder + self.name = name + + +class Resource(ResourceBase): + """ + A class representing an in-package resource, such as a data file. This is + not normally instantiated by user code, but rather by a + :class:`ResourceFinder` which manages the resource. + """ + is_container = False # Backwards compatibility + + def as_stream(self): + """ + Get the resource as a stream. + + This is not a property to make it obvious that it returns a new stream + each time. + """ + return self.finder.get_stream(self) + + @cached_property + def file_path(self): + global cache + if cache is None: + cache = ResourceCache() + return cache.get(self) + + @cached_property + def bytes(self): + return self.finder.get_bytes(self) + + @cached_property + def size(self): + return self.finder.get_size(self) + + +class ResourceContainer(ResourceBase): + is_container = True # Backwards compatibility + + @cached_property + def resources(self): + return self.finder.get_resources(self) + + +class ResourceFinder(object): + """ + Resource finder for file system resources. + """ + + if sys.platform.startswith('java'): + skipped_extensions = ('.pyc', '.pyo', '.class') + else: + skipped_extensions = ('.pyc', '.pyo') + + def __init__(self, module): + self.module = module + self.loader = getattr(module, '__loader__', None) + self.base = os.path.dirname(getattr(module, '__file__', '')) + + def _adjust_path(self, path): + return os.path.realpath(path) + + def _make_path(self, resource_name): + # Issue #50: need to preserve type of path on Python 2.x + # like os.path._get_sep + if isinstance(resource_name, bytes): # should only happen on 2.x + sep = b'/' + else: + sep = '/' + parts = resource_name.split(sep) + parts.insert(0, self.base) + result = os.path.join(*parts) + return self._adjust_path(result) + + def _find(self, path): + return os.path.exists(path) + + def get_cache_info(self, resource): + return None, resource.path + + def find(self, resource_name): + path = self._make_path(resource_name) + if not self._find(path): + result = None + else: + if self._is_directory(path): + result = ResourceContainer(self, resource_name) + else: + result = Resource(self, resource_name) + result.path = path + return result + + def get_stream(self, resource): + return open(resource.path, 'rb') + + def get_bytes(self, resource): + with open(resource.path, 'rb') as f: + return f.read() + + def get_size(self, resource): + return os.path.getsize(resource.path) + + def get_resources(self, resource): + def allowed(f): + return (f != '__pycache__' and not + f.endswith(self.skipped_extensions)) + return set([f for f in os.listdir(resource.path) if allowed(f)]) + + def is_container(self, resource): + return self._is_directory(resource.path) + + _is_directory = staticmethod(os.path.isdir) + + def iterator(self, resource_name): + resource = self.find(resource_name) + if resource is not None: + todo = [resource] + while todo: + resource = todo.pop(0) + yield resource + if resource.is_container: + rname = resource.name + for name in resource.resources: + if not rname: + new_name = name + else: + new_name = '/'.join([rname, name]) + child = self.find(new_name) + if child.is_container: + todo.append(child) + else: + yield child + + +class ZipResourceFinder(ResourceFinder): + """ + Resource finder for resources in .zip files. + """ + def __init__(self, module): + super(ZipResourceFinder, self).__init__(module) + archive = self.loader.archive + self.prefix_len = 1 + len(archive) + # PyPy doesn't have a _files attr on zipimporter, and you can't set one + if hasattr(self.loader, '_files'): + self._files = self.loader._files + else: + self._files = zipimport._zip_directory_cache[archive] + self.index = sorted(self._files) + + def _adjust_path(self, path): + return path + + def _find(self, path): + path = path[self.prefix_len:] + if path in self._files: + result = True + else: + if path and path[-1] != os.sep: + path = path + os.sep + i = bisect.bisect(self.index, path) + try: + result = self.index[i].startswith(path) + except IndexError: + result = False + if not result: + logger.debug('_find failed: %r %r', path, self.loader.prefix) + else: + logger.debug('_find worked: %r %r', path, self.loader.prefix) + return result + + def get_cache_info(self, resource): + prefix = self.loader.archive + path = resource.path[1 + len(prefix):] + return prefix, path + + def get_bytes(self, resource): + return self.loader.get_data(resource.path) + + def get_stream(self, resource): + return io.BytesIO(self.get_bytes(resource)) + + def get_size(self, resource): + path = resource.path[self.prefix_len:] + return self._files[path][3] + + def get_resources(self, resource): + path = resource.path[self.prefix_len:] + if path and path[-1] != os.sep: + path += os.sep + plen = len(path) + result = set() + i = bisect.bisect(self.index, path) + while i < len(self.index): + if not self.index[i].startswith(path): + break + s = self.index[i][plen:] + result.add(s.split(os.sep, 1)[0]) # only immediate children + i += 1 + return result + + def _is_directory(self, path): + path = path[self.prefix_len:] + if path and path[-1] != os.sep: + path += os.sep + i = bisect.bisect(self.index, path) + try: + result = self.index[i].startswith(path) + except IndexError: + result = False + return result + +_finder_registry = { + type(None): ResourceFinder, + zipimport.zipimporter: ZipResourceFinder +} + +try: + # In Python 3.6, _frozen_importlib -> _frozen_importlib_external + try: + import _frozen_importlib_external as _fi + except ImportError: + import _frozen_importlib as _fi + _finder_registry[_fi.SourceFileLoader] = ResourceFinder + _finder_registry[_fi.FileFinder] = ResourceFinder + del _fi +except (ImportError, AttributeError): + pass + + +def register_finder(loader, finder_maker): + _finder_registry[type(loader)] = finder_maker + +_finder_cache = {} + + +def finder(package): + """ + Return a resource finder for a package. + :param package: The name of the package. + :return: A :class:`ResourceFinder` instance for the package. + """ + if package in _finder_cache: + result = _finder_cache[package] + else: + if package not in sys.modules: + __import__(package) + module = sys.modules[package] + path = getattr(module, '__path__', None) + if path is None: + raise DistlibException('You cannot get a finder for a module, ' + 'only for a package') + loader = getattr(module, '__loader__', None) + finder_maker = _finder_registry.get(type(loader)) + if finder_maker is None: + raise DistlibException('Unable to locate finder for %r' % package) + result = finder_maker(module) + _finder_cache[package] = result + return result + + +_dummy_module = types.ModuleType(str('__dummy__')) + + +def finder_for_path(path): + """ + Return a resource finder for a path, which should represent a container. + + :param path: The path. + :return: A :class:`ResourceFinder` instance for the path. + """ + result = None + # calls any path hooks, gets importer into cache + pkgutil.get_importer(path) + loader = sys.path_importer_cache.get(path) + finder = _finder_registry.get(type(loader)) + if finder: + module = _dummy_module + module.__file__ = os.path.join(path, '') + module.__loader__ = loader + result = finder(module) + return result -- cgit v1.2.3