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