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import glob import os import subprocess import sys from distutils import log from distutils.errors import DistutilsError import pkg_resources from setuptools.command.easy_install import easy_install from setuptools.extern import six from setuptools.wheel import Wheel from .py31compat import TemporaryDirectory def _fixup_find_links(find_links): """Ensure find-links option end-up being a list of strings.""" if isinstance(find_links, six.string_types): return find_links.split() assert isinstance(find_links, (tuple, list)) return find_links def _legacy_fetch_build_egg(dist, req): """Fetch an egg needed for building. Legacy path using EasyInstall. """ tmp_dist = dist.__class__({'script_args': ['easy_install']}) opts = tmp_dist.get_option_dict('easy_install') opts.clear() opts.update( (k, v) for k, v in dist.get_option_dict('easy_install').items() if k in ( # don't use any other settings 'find_links', 'site_dirs', 'index_url', 'optimize', 'site_dirs', 'allow_hosts', )) if dist.dependency_links: links = dist.dependency_links[:] if 'find_links' in opts: links = _fixup_find_links(opts['find_links'][1]) + links opts['find_links'] = ('setup', links) install_dir = dist.get_egg_cache_dir() cmd = easy_install( tmp_dist, args=["x"], install_dir=install_dir, exclude_scripts=True, always_copy=False, build_directory=None, editable=False, upgrade=False, multi_version=True, no_report=True, user=False ) cmd.ensure_finalized() return cmd.easy_install(req) def fetch_build_egg(dist, req): """Fetch an egg needed for building. Use pip/wheel to fetch/build a wheel.""" # Check pip is available. try: pkg_resources.get_distribution('pip') except pkg_resources.DistributionNotFound: dist.announce( 'WARNING: The pip package is not available, falling back ' 'to EasyInstall for handling setup_requires/test_requires; ' 'this is deprecated and will be removed in a future version.', log.WARN ) return _legacy_fetch_build_egg(dist, req) # Warn if wheel is not. try: pkg_resources.get_distribution('wheel') except pkg_resources.DistributionNotFound: dist.announce('WARNING: The wheel package is not available.', log.WARN) # Ignore environment markers; if supplied, it is required. req = strip_marker(req) # Take easy_install options into account, but do not override relevant # pip environment variables (like PIP_INDEX_URL or PIP_QUIET); they'll # take precedence. opts = dist.get_option_dict('easy_install') if 'allow_hosts' in opts: raise DistutilsError('the `allow-hosts` option is not supported ' 'when using pip to install requirements.') if 'PIP_QUIET' in os.environ or 'PIP_VERBOSE' in os.environ: quiet = False else: quiet = True if 'PIP_INDEX_URL' in os.environ: index_url = None elif 'index_url' in opts: index_url = opts['index_url'][1] else: index_url = None if 'find_links' in opts: find_links = _fixup_find_links(opts['find_links'][1])[:] else: find_links = [] if dist.dependency_links: find_links.extend(dist.dependency_links) eggs_dir = os.path.realpath(dist.get_egg_cache_dir()) environment = pkg_resources.Environment() for egg_dist in pkg_resources.find_distributions(eggs_dir): if egg_dist in req and environment.can_add(egg_dist): return egg_dist with TemporaryDirectory() as tmpdir: cmd = [ sys.executable, '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', tmpdir, ] if quiet: cmd.append('--quiet') if index_url is not None: cmd.extend(('--index-url', index_url)) if find_links is not None: for link in find_links: cmd.extend(('--find-links', link)) # If requirement is a PEP 508 direct URL, directly pass # the URL to pip, as `req @ url` does not work on the # command line. if req.url: cmd.append(req.url) else: cmd.append(str(req)) try: subprocess.check_call(cmd) except subprocess.CalledProcessError as e: raise DistutilsError(str(e)) wheel = Wheel(glob.glob(os.path.join(tmpdir, '*.whl'))[0]) dist_location = os.path.join(eggs_dir, wheel.egg_name()) wheel.install_as_egg(dist_location) dist_metadata = pkg_resources.PathMetadata( dist_location, os.path.join(dist_location, 'EGG-INFO')) dist = pkg_resources.Distribution.from_filename( dist_location, metadata=dist_metadata) return dist def strip_marker(req): """ Return a new requirement without the environment marker to avoid calling pip with something like `babel; extra == "i18n"`, which would always be ignored. """ # create a copy to avoid mutating the input req = pkg_resources.Requirement.parse(str(req)) req.marker = None return req