155 lines
5 KiB
Python
155 lines
5 KiB
Python
from __future__ import annotations
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import glob
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import itertools
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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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import packaging.requirements
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import packaging.utils
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from . import _reqs
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from ._importlib import metadata
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from .warnings import SetuptoolsDeprecationWarning
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from .wheel import Wheel
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from distutils import log
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from distutils.errors import DistutilsError
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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):
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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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_DeprecatedInstaller.emit()
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_warn_wheel_not_available(dist)
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return _fetch_build_egg_no_warn(dist, req)
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def _present(req):
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return any(_dist_matches_req(dist, req) for dist in metadata.distributions())
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def _fetch_build_eggs(dist, requires: _reqs._StrOrIter) -> list[metadata.Distribution]:
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_DeprecatedInstaller.emit(stacklevel=3)
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_warn_wheel_not_available(dist)
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parsed_reqs = _reqs.parse(requires)
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missing_reqs = itertools.filterfalse(_present, parsed_reqs)
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needed_reqs = (
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req for req in missing_reqs if not req.marker or req.marker.evaluate()
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)
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resolved_dists = [_fetch_build_egg_no_warn(dist, req) for req in needed_reqs]
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for dist in resolved_dists:
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# dist.locate_file('') is the directory containing EGG-INFO, where the importabl
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# contents can be found.
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sys.path.insert(0, str(dist.locate_file('')))
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return resolved_dists
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def _dist_matches_req(egg_dist, req):
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return (
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packaging.utils.canonicalize_name(egg_dist.name)
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== packaging.utils.canonicalize_name(req.name)
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and egg_dist.version in req.specifier
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)
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def _fetch_build_egg_no_warn(dist, req): # noqa: C901 # is too complex (16) # FIXME
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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(
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'the `allow-hosts` option is not supported '
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'when using pip to install requirements.'
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)
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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 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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cached_dists = metadata.Distribution.discover(path=glob.glob(f'{eggs_dir}/*.egg'))
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for egg_dist in cached_dists:
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if _dist_matches_req(egg_dist, req):
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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,
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'-m',
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'pip',
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'--disable-pip-version-check',
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'wheel',
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'--no-deps',
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'-w',
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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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return metadata.Distribution.at(dist_location + '/EGG-INFO')
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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 = packaging.requirements.Requirement(str(req))
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req.marker = None
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return req
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def _warn_wheel_not_available(dist):
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try:
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metadata.distribution('wheel')
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except metadata.PackageNotFoundError:
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dist.announce('WARNING: The wheel package is not available.', log.WARN)
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class _DeprecatedInstaller(SetuptoolsDeprecationWarning):
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_SUMMARY = "setuptools.installer and fetch_build_eggs are deprecated."
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_DETAILS = """
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Requirements should be satisfied by a PEP 517 installer.
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If you are using pip, you can try `pip install --use-pep517`.
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"""
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_DUE_DATE = 2025, 10, 31
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