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127 lines
5.4 KiB
127 lines
5.4 KiB
import logging
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from typing import Iterable, Set, Tuple
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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.metadata import BaseDistribution
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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_metadata_distribution(self) -> BaseDistribution:
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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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# Setup an isolated environment and install the build backend static
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# requirements in it.
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self._prepare_build_backend(finder)
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# Check that if the requirement is editable, it either supports PEP 660 or
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# has a setup.py or a setup.cfg. This cannot be done earlier because we need
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# to setup the build backend to verify it supports build_editable, nor can
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# it be done later, because we want to avoid installing build requirements
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# needlessly. Doing it here also works around setuptools generating
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# UNKNOWN.egg-info when running get_requires_for_build_wheel on a directory
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# without setup.py nor setup.cfg.
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self.req.isolated_editable_sanity_check()
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# Install the dynamic build requirements.
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self._install_build_reqs(finder)
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self.req.prepare_metadata()
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def _prepare_build_backend(self, finder: PackageFinder) -> None:
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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", kind="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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self._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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def _get_build_requires_wheel(self) -> Iterable[str]:
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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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return backend.get_requires_for_build_wheel()
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def _get_build_requires_editable(self) -> Iterable[str]:
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with self.req.build_env:
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runner = runner_with_spinner_message(
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"Getting requirements to build editable"
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)
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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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return backend.get_requires_for_build_editable()
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def _install_build_reqs(self, finder: PackageFinder) -> None:
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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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if (
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self.req.editable
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and self.req.permit_editable_wheels
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and self.req.supports_pyproject_editable()
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):
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build_reqs = self._get_build_requires_editable()
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else:
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build_reqs = self._get_build_requires_wheel()
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conflicting, missing = self.req.build_env.check_requirements(build_reqs)
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if conflicting:
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self._raise_conflicts("the backend dependencies", conflicting)
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self.req.build_env.install_requirements(
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finder, missing, "normal", kind="backend dependencies"
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)
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def _raise_conflicts(
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self, 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_reqs)
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),
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)
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raise InstallationError(error_message)
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