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96 lines
3.8 KiB
Python
96 lines
3.8 KiB
Python
2 years ago
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import logging
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from typing import Set, Tuple
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from pip._vendor.pkg_resources import Distribution
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from pip._internal.build_env import BuildEnvironment
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from pip._internal.distributions.base import AbstractDistribution
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from pip._internal.exceptions import InstallationError
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from pip._internal.index.package_finder import PackageFinder
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from pip._internal.utils.subprocess import runner_with_spinner_message
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logger = logging.getLogger(__name__)
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class SourceDistribution(AbstractDistribution):
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"""Represents a source distribution.
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The preparation step for these needs metadata for the packages to be
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generated, either using PEP 517 or using the legacy `setup.py egg_info`.
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"""
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def get_pkg_resources_distribution(self) -> Distribution:
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return self.req.get_dist()
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def prepare_distribution_metadata(
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self, finder: PackageFinder, build_isolation: bool
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) -> None:
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# Load pyproject.toml, to determine whether PEP 517 is to be used
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self.req.load_pyproject_toml()
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# Set up the build isolation, if this requirement should be isolated
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should_isolate = self.req.use_pep517 and build_isolation
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if should_isolate:
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self._setup_isolation(finder)
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self.req.prepare_metadata()
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def _setup_isolation(self, finder: PackageFinder) -> None:
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def _raise_conflicts(
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conflicting_with: str, conflicting_reqs: Set[Tuple[str, str]]
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) -> None:
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format_string = (
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"Some build dependencies for {requirement} "
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"conflict with {conflicting_with}: {description}."
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)
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error_message = format_string.format(
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requirement=self.req,
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conflicting_with=conflicting_with,
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description=", ".join(
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f"{installed} is incompatible with {wanted}"
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for installed, wanted in sorted(conflicting)
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),
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)
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raise InstallationError(error_message)
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# Isolate in a BuildEnvironment and install the build-time
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# requirements.
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pyproject_requires = self.req.pyproject_requires
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assert pyproject_requires is not None
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self.req.build_env = BuildEnvironment()
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self.req.build_env.install_requirements(
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finder, pyproject_requires, "overlay", "Installing build dependencies"
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)
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conflicting, missing = self.req.build_env.check_requirements(
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self.req.requirements_to_check
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)
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if conflicting:
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_raise_conflicts("PEP 517/518 supported requirements", conflicting)
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if missing:
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logger.warning(
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"Missing build requirements in pyproject.toml for %s.",
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self.req,
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)
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logger.warning(
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"The project does not specify a build backend, and "
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"pip cannot fall back to setuptools without %s.",
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" and ".join(map(repr, sorted(missing))),
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)
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# Install any extra build dependencies that the backend requests.
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# This must be done in a second pass, as the pyproject.toml
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# dependencies must be installed before we can call the backend.
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with self.req.build_env:
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runner = runner_with_spinner_message("Getting requirements to build wheel")
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backend = self.req.pep517_backend
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assert backend is not None
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with backend.subprocess_runner(runner):
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reqs = backend.get_requires_for_build_wheel()
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conflicting, missing = self.req.build_env.check_requirements(reqs)
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if conflicting:
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_raise_conflicts("the backend dependencies", conflicting)
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self.req.build_env.install_requirements(
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finder, missing, "normal", "Installing backend dependencies"
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)
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