| import logging |
| |
| from pip._internal.build_env import BuildEnvironment |
| from pip._internal.distributions.base import AbstractDistribution |
| from pip._internal.exceptions import InstallationError |
| |
| 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`. |
| |
| NOTE from @pradyunsg (14 June 2019) |
| I expect SourceDistribution class will need to be split into |
| `legacy_source` (setup.py based) and `source` (PEP 517 based) when we start |
| bringing logic for preparation out of InstallRequirement into this class. |
| """ |
| |
| def get_pkg_resources_distribution(self): |
| return self.req.get_dist() |
| |
| def prepare_distribution_metadata(self, finder, build_isolation): |
| # Prepare for building. We need to: |
| # 1. Load pyproject.toml (if it exists) |
| # 2. Set up the build environment |
| |
| self.req.load_pyproject_toml() |
| should_isolate = self.req.use_pep517 and build_isolation |
| |
| def _raise_conflicts(conflicting_with, conflicting_reqs): |
| raise InstallationError( |
| "Some build dependencies for %s conflict with %s: %s." % ( |
| self.req, conflicting_with, ', '.join( |
| '%s is incompatible with %s' % (installed, wanted) |
| for installed, wanted in sorted(conflicting)))) |
| |
| if should_isolate: |
| # Isolate in a BuildEnvironment and install the build-time |
| # requirements. |
| self.req.build_env = BuildEnvironment() |
| self.req.build_env.install_requirements( |
| finder, self.req.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: |
| # We need to have the env active when calling the hook. |
| self.req.spin_message = "Getting requirements to build wheel" |
| reqs = self.req.pep517_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" |
| ) |
| |
| self.req.prepare_metadata() |
| self.req.assert_source_matches_version() |