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98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
2 years ago
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import glob
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import os
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import subprocess
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import sys
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import tempfile
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from distutils import log
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from distutils.errors import DistutilsError
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import pkg_resources
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from setuptools.wheel import Wheel
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def _fixup_find_links(find_links):
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"""Ensure find-links option end-up being a list of strings."""
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if isinstance(find_links, str):
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return find_links.split()
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assert isinstance(find_links, (tuple, list))
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return find_links
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def fetch_build_egg(dist, req): # noqa: C901 # is too complex (16) # FIXME
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"""Fetch an egg needed for building.
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Use pip/wheel to fetch/build a wheel."""
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# Warn if wheel is not available
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try:
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pkg_resources.get_distribution('wheel')
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except pkg_resources.DistributionNotFound:
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dist.announce('WARNING: The wheel package is not available.', log.WARN)
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# Ignore environment markers; if supplied, it is required.
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req = strip_marker(req)
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# Take easy_install options into account, but do not override relevant
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# pip environment variables (like PIP_INDEX_URL or PIP_QUIET); they'll
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# take precedence.
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opts = dist.get_option_dict('easy_install')
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if 'allow_hosts' in opts:
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raise DistutilsError('the `allow-hosts` option is not supported '
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'when using pip to install requirements.')
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quiet = 'PIP_QUIET' not in os.environ and 'PIP_VERBOSE' not in os.environ
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if 'PIP_INDEX_URL' in os.environ:
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index_url = None
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elif 'index_url' in opts:
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index_url = opts['index_url'][1]
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else:
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index_url = None
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find_links = (
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_fixup_find_links(opts['find_links'][1])[:] if 'find_links' in opts
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else []
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)
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if dist.dependency_links:
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find_links.extend(dist.dependency_links)
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eggs_dir = os.path.realpath(dist.get_egg_cache_dir())
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environment = pkg_resources.Environment()
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for egg_dist in pkg_resources.find_distributions(eggs_dir):
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if egg_dist in req and environment.can_add(egg_dist):
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return egg_dist
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with tempfile.TemporaryDirectory() as tmpdir:
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cmd = [
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sys.executable, '-m', 'pip',
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'--disable-pip-version-check',
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'wheel', '--no-deps',
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'-w', tmpdir,
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]
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if quiet:
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cmd.append('--quiet')
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if index_url is not None:
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cmd.extend(('--index-url', index_url))
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for link in find_links or []:
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cmd.extend(('--find-links', link))
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# If requirement is a PEP 508 direct URL, directly pass
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# the URL to pip, as `req @ url` does not work on the
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# command line.
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cmd.append(req.url or str(req))
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try:
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subprocess.check_call(cmd)
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except subprocess.CalledProcessError as e:
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raise DistutilsError(str(e)) from e
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wheel = Wheel(glob.glob(os.path.join(tmpdir, '*.whl'))[0])
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dist_location = os.path.join(eggs_dir, wheel.egg_name())
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wheel.install_as_egg(dist_location)
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dist_metadata = pkg_resources.PathMetadata(
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dist_location, os.path.join(dist_location, 'EGG-INFO'))
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dist = pkg_resources.Distribution.from_filename(
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dist_location, metadata=dist_metadata)
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return dist
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def strip_marker(req):
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"""
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Return a new requirement without the environment marker to avoid
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calling pip with something like `babel; extra == "i18n"`, which
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would always be ignored.
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"""
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# create a copy to avoid mutating the input
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req = pkg_resources.Requirement.parse(str(req))
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req.marker = None
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return req
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