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📁 ..	-	2026-03-21 15:45
📄 __init__.py	0 B	2026-01-20 12:58
📁 __pycache__	-	2026-03-21 15:45
📁 build	-	2026-03-21 15:56
📄 check.py """Validation of dependencies of packages""" from __future__ import annotations import logging from collections.abc import Generator, Iterable from contextlib import suppress from email.parser import Parser from functools import reduce from typing import ( Callable, NamedTuple, ) from pip._vendor.packaging.requirements import Requirement from pip._vendor.packaging.tags import Tag, parse_tag from pip._vendor.packaging.utils import NormalizedName, canonicalize_name from pip._vendor.packaging.version import Version from pip._internal.distributions import make_distribution_for_install_requirement from pip._internal.metadata import get_default_environment from pip._internal.metadata.base import BaseDistribution from pip._internal.req.req_install import InstallRequirement logger = logging.getLogger(__name__) class PackageDetails(NamedTuple): version: Version dependencies: list[Requirement] # Shorthands PackageSet = dict[NormalizedName, PackageDetails] Missing = tuple[NormalizedName, Requirement] Conflicting = tuple[NormalizedName, Version, Requirement] MissingDict = dict[NormalizedName, list[Missing]] ConflictingDict = dict[NormalizedName, list[Conflicting]] CheckResult = tuple[MissingDict, ConflictingDict] ConflictDetails = tuple[PackageSet, CheckResult] def create_package_set_from_installed() -> tuple[PackageSet, bool]: """Converts a list of distributions into a PackageSet.""" package_set = {} problems = False env = get_default_environment() for dist in env.iter_installed_distributions(local_only=False, skip=()): name = dist.canonical_name try: dependencies = list(dist.iter_dependencies()) package_set[name] = PackageDetails(dist.version, dependencies) except (OSError, ValueError) as e: # Don't crash on unreadable or broken metadata. logger.warning("Error parsing dependencies of %s: %s", name, e) problems = True return package_set, problems def check_package_set( package_set: PackageSet, should_ignore: Callable[[str], bool] \| None = None ) -> CheckResult: """Check if a package set is consistent If should_ignore is passed, it should be a callable that takes a package name and returns a boolean. """ missing = {} conflicting = {} for package_name, package_detail in package_set.items(): # Info about dependencies of package_name missing_deps: set[Missing] = set() conflicting_deps: set[Conflicting] = set() if should_ignore and should_ignore(package_name): continue for req in package_detail.dependencies: name = canonicalize_name(req.name) # Check if it's missing if name not in package_set: missed = True if req.marker is not None: missed = req.marker.evaluate({"extra": ""}) if missed: missing_deps.add((name, req)) continue # Check if there's a conflict version = package_set[name].version if not req.specifier.contains(version, prereleases=True): conflicting_deps.add((name, version, req)) if missing_deps: missing[package_name] = sorted(missing_deps, key=str) if conflicting_deps: conflicting[package_name] = sorted(conflicting_deps, key=str) return missing, conflicting def check_install_conflicts(to_install: list[InstallRequirement]) -> ConflictDetails: """For checking if the dependency graph would be consistent after \ installing given requirements """ # Start from the current state package_set, _ = create_package_set_from_installed() # Install packages would_be_installed = _simulate_installation_of(to_install, package_set) # Only warn about directly-dependent packages; create a whitelist of them whitelist = _create_whitelist(would_be_installed, package_set) return ( package_set, check_package_set( package_set, should_ignore=lambda name: name not in whitelist ), ) def check_unsupported( packages: Iterable[BaseDistribution], supported_tags: Iterable[Tag], ) -> Generator[BaseDistribution, None, None]: for p in packages: with suppress(FileNotFoundError): wheel_file = p.read_text("WHEEL") wheel_tags: frozenset[Tag] = reduce( frozenset.union, map(parse_tag, Parser().parsestr(wheel_file).get_all("Tag", [])), frozenset(), ) if wheel_tags.isdisjoint(supported_tags): yield p def _simulate_installation_of( to_install: list[InstallRequirement], package_set: PackageSet ) -> set[NormalizedName]: """Computes the version of packages after installing to_install.""" # Keep track of packages that were installed installed = set() # Modify it as installing requirement_set would (assuming no errors) for inst_req in to_install: abstract_dist = make_distribution_for_install_requirement(inst_req) dist = abstract_dist.get_metadata_distribution() name = dist.canonical_name package_set[name] = PackageDetails(dist.version, list(dist.iter_dependencies())) installed.add(name) return installed def _create_whitelist( would_be_installed: set[NormalizedName], package_set: PackageSet ) -> set[NormalizedName]: packages_affected = set(would_be_installed) for package_name in package_set: if package_name in packages_affected: continue for req in package_set[package_name].dependencies: if canonicalize_name(req.name) in packages_affected: packages_affected.add(package_name) break return packages_affected	5.76 KB	2026-01-20 12:58
📄 freeze.py from __future__ import annotations import collections import logging import os from collections.abc import Container, Generator, Iterable from dataclasses import dataclass, field from typing import NamedTuple from pip._vendor.packaging.utils import NormalizedName, canonicalize_name from pip._vendor.packaging.version import InvalidVersion from pip._internal.exceptions import BadCommand, InstallationError from pip._internal.metadata import BaseDistribution, get_environment from pip._internal.req.constructors import ( install_req_from_editable, install_req_from_line, ) from pip._internal.req.req_file import COMMENT_RE from pip._internal.utils.direct_url_helpers import direct_url_as_pep440_direct_reference logger = logging.getLogger(__name__) class _EditableInfo(NamedTuple): requirement: str comments: list[str] def freeze( requirement: list[str] \| None = None, local_only: bool = False, user_only: bool = False, paths: list[str] \| None = None, isolated: bool = False, exclude_editable: bool = False, skip: Container[str] = (), ) -> Generator[str, None, None]: installations: dict[str, FrozenRequirement] = {} dists = get_environment(paths).iter_installed_distributions( local_only=local_only, skip=(), user_only=user_only, ) for dist in dists: req = FrozenRequirement.from_dist(dist) if exclude_editable and req.editable: continue installations[req.canonical_name] = req if requirement: # the options that don't get turned into an InstallRequirement # should only be emitted once, even if the same option is in multiple # requirements files, so we need to keep track of what has been emitted # so that we don't emit it again if it's seen again emitted_options: set[str] = set() # keep track of which files a requirement is in so that we can # give an accurate warning if a requirement appears multiple times. req_files: dict[str, list[str]] = collections.defaultdict(list) for req_file_path in requirement: with open(req_file_path) as req_file: for line in req_file: if ( not line.strip() or line.strip().startswith("#") or line.startswith( ( "-r", "--requirement", "-f", "--find-links", "-i", "--index-url", "--pre", "--trusted-host", "--process-dependency-links", "--extra-index-url", "--use-feature", ) ) ): line = line.rstrip() if line not in emitted_options: emitted_options.add(line) yield line continue if line.startswith(("-e", "--editable")): if line.startswith("-e"): line = line[2:].strip() else: line = line[len("--editable") :].strip().lstrip("=") line_req = install_req_from_editable( line, isolated=isolated, ) else: line_req = install_req_from_line( COMMENT_RE.sub("", line).strip(), isolated=isolated, ) if not line_req.name: logger.info( "Skipping line in requirement file [%s] because " "it's not clear what it would install: %s", req_file_path, line.strip(), ) logger.info( " (add #egg=PackageName to the URL to avoid" " this warning)" ) else: line_req_canonical_name = canonicalize_name(line_req.name) if line_req_canonical_name not in installations: # either it's not installed, or it is installed # but has been processed already if not req_files[line_req.name]: logger.warning( "Requirement file [%s] contains %s, but " "package %r is not installed", req_file_path, COMMENT_RE.sub("", line).strip(), line_req.name, ) else: req_files[line_req.name].append(req_file_path) else: yield str(installations[line_req_canonical_name]).rstrip() del installations[line_req_canonical_name] req_files[line_req.name].append(req_file_path) # Warn about requirements that were included multiple times (in a # single requirements file or in different requirements files). for name, files in req_files.items(): if len(files) > 1: logger.warning( "Requirement %s included multiple times [%s]", name, ", ".join(sorted(set(files))), ) yield ("## The following requirements were added by pip freeze:") for installation in sorted(installations.values(), key=lambda x: x.name.lower()): if installation.canonical_name not in skip: yield str(installation).rstrip() def _format_as_name_version(dist: BaseDistribution) -> str: try: dist_version = dist.version except InvalidVersion: # legacy version return f"{dist.raw_name}==={dist.raw_version}" else: return f"{dist.raw_name}=={dist_version}" def _get_editable_info(dist: BaseDistribution) -> _EditableInfo: """ Compute and return values (req, comments) for use in FrozenRequirement.from_dist(). """ editable_project_location = dist.editable_project_location assert editable_project_location location = os.path.normcase(os.path.abspath(editable_project_location)) from pip._internal.vcs import RemoteNotFoundError, RemoteNotValidError, vcs vcs_backend = vcs.get_backend_for_dir(location) if vcs_backend is None: display = _format_as_name_version(dist) logger.debug( 'No VCS found for editable requirement "%s" in: %r', display, location, ) return _EditableInfo( requirement=location, comments=[f"# Editable install with no version control ({display})"], ) vcs_name = type(vcs_backend).__name__ try: req = vcs_backend.get_src_requirement(location, dist.raw_name) except RemoteNotFoundError: display = _format_as_name_version(dist) return _EditableInfo( requirement=location, comments=[f"# Editable {vcs_name} install with no remote ({display})"], ) except RemoteNotValidError as ex: display = _format_as_name_version(dist) return _EditableInfo( requirement=location, comments=[ f"# Editable {vcs_name} install ({display}) with either a deleted " f"local remote or invalid URI:", f"# '{ex.url}'", ], ) except BadCommand: logger.warning( "cannot determine version of editable source in %s " "(%s command not found in path)", location, vcs_backend.name, ) return _EditableInfo(requirement=location, comments=[]) except InstallationError as exc: logger.warning("Error when trying to get requirement for VCS system %s", exc) else: return _EditableInfo(requirement=req, comments=[]) logger.warning("Could not determine repository location of %s", location) return _EditableInfo( requirement=location, comments=["## !! Could not determine repository location"], ) @dataclass(frozen=True) class FrozenRequirement: name: str req: str editable: bool comments: Iterable[str] = field(default_factory=tuple) @property def canonical_name(self) -> NormalizedName: return canonicalize_name(self.name) @classmethod def from_dist(cls, dist: BaseDistribution) -> FrozenRequirement: editable = dist.editable if editable: req, comments = _get_editable_info(dist) else: comments = [] direct_url = dist.direct_url if direct_url: # if PEP 610 metadata is present, use it req = direct_url_as_pep440_direct_reference(direct_url, dist.raw_name) else: # name==version requirement req = _format_as_name_version(dist) return cls(dist.raw_name, req, editable, comments=comments) def __str__(self) -> str: req = self.req if self.editable: req = f"-e {req}" return "\n".join(list(self.comments) + [str(req)]) + "\n"	9.62 KB	2026-01-20 12:58
📁 install	-	2026-03-21 15:56
📄 prepare.py """Prepares a distribution for installation""" # The following comment should be removed at some point in the future. # mypy: strict-optional=False from __future__ import annotations import mimetypes import os import shutil from collections.abc import Iterable from dataclasses import dataclass from pathlib import Path from typing import TYPE_CHECKING from pip._vendor.packaging.utils import canonicalize_name from pip._internal.build_env import BuildEnvironmentInstaller from pip._internal.distributions import make_distribution_for_install_requirement from pip._internal.distributions.installed import InstalledDistribution from pip._internal.exceptions import ( DirectoryUrlHashUnsupported, HashMismatch, HashUnpinned, InstallationError, MetadataInconsistent, NetworkConnectionError, VcsHashUnsupported, ) from pip._internal.index.package_finder import PackageFinder from pip._internal.metadata import BaseDistribution, get_metadata_distribution from pip._internal.models.direct_url import ArchiveInfo from pip._internal.models.link import Link from pip._internal.models.wheel import Wheel from pip._internal.network.download import Downloader from pip._internal.network.lazy_wheel import ( HTTPRangeRequestUnsupported, dist_from_wheel_url, ) from pip._internal.network.session import PipSession from pip._internal.operations.build.build_tracker import BuildTracker from pip._internal.req.req_install import InstallRequirement from pip._internal.utils._log import getLogger from pip._internal.utils.direct_url_helpers import ( direct_url_for_editable, direct_url_from_link, ) from pip._internal.utils.hashes import Hashes, MissingHashes from pip._internal.utils.logging import indent_log from pip._internal.utils.misc import ( display_path, hash_file, hide_url, redact_auth_from_requirement, ) from pip._internal.utils.temp_dir import TempDirectory from pip._internal.utils.unpacking import unpack_file from pip._internal.vcs import vcs if TYPE_CHECKING: from pip._internal.cli.progress_bars import BarType logger = getLogger(__name__) def _get_prepared_distribution( req: InstallRequirement, build_tracker: BuildTracker, build_env_installer: BuildEnvironmentInstaller, build_isolation: bool, check_build_deps: bool, ) -> BaseDistribution: """Prepare a distribution for installation.""" abstract_dist = make_distribution_for_install_requirement(req) tracker_id = abstract_dist.build_tracker_id if tracker_id is not None: with build_tracker.track(req, tracker_id): abstract_dist.prepare_distribution_metadata( build_env_installer, build_isolation, check_build_deps ) return abstract_dist.get_metadata_distribution() def unpack_vcs_link(link: Link, location: str, verbosity: int) -> None: vcs_backend = vcs.get_backend_for_scheme(link.scheme) assert vcs_backend is not None vcs_backend.unpack(location, url=hide_url(link.url), verbosity=verbosity) @dataclass class File: path: str content_type: str \| None = None def __post_init__(self) -> None: if self.content_type is None: # Try to guess the file's MIME type. If the system MIME tables # can't be loaded, give up. try: self.content_type = mimetypes.guess_type(self.path)[0] except OSError: pass def get_http_url( link: Link, download: Downloader, download_dir: str \| None = None, hashes: Hashes \| None = None, ) -> File: temp_dir = TempDirectory(kind="unpack", globally_managed=True) # If a download dir is specified, is the file already downloaded there? already_downloaded_path = None if download_dir: already_downloaded_path = _check_download_dir(link, download_dir, hashes) if already_downloaded_path: from_path = already_downloaded_path content_type = None else: # let's download to a tmp dir from_path, content_type = download(link, temp_dir.path) if hashes: hashes.check_against_path(from_path) return File(from_path, content_type) def get_file_url( link: Link, download_dir: str \| None = None, hashes: Hashes \| None = None ) -> File: """Get file and optionally check its hash.""" # If a download dir is specified, is the file already there and valid? already_downloaded_path = None if download_dir: already_downloaded_path = _check_download_dir(link, download_dir, hashes) if already_downloaded_path: from_path = already_downloaded_path else: from_path = link.file_path # If --require-hashes is off, `hashes` is either empty, the # link's embedded hash, or MissingHashes; it is required to # match. If --require-hashes is on, we are satisfied by any # hash in `hashes` matching: a URL-based or an option-based # one; no internet-sourced hash will be in `hashes`. if hashes: hashes.check_against_path(from_path) return File(from_path, None) def unpack_url( link: Link, location: str, download: Downloader, verbosity: int, download_dir: str \| None = None, hashes: Hashes \| None = None, ) -> File \| None: """Unpack link into location, downloading if required. :param hashes: A Hashes object, one of whose embedded hashes must match, or HashMismatch will be raised. If the Hashes is empty, no matches are required, and unhashable types of requirements (like VCS ones, which would ordinarily raise HashUnsupported) are allowed. """ # non-editable vcs urls if link.is_vcs: unpack_vcs_link(link, location, verbosity=verbosity) return None assert not link.is_existing_dir() # file urls if link.is_file: file = get_file_url(link, download_dir, hashes=hashes) # http urls else: file = get_http_url( link, download, download_dir, hashes=hashes, ) # unpack the archive to the build dir location. even when only downloading # archives, they have to be unpacked to parse dependencies, except wheels if not link.is_wheel: unpack_file(file.path, location, file.content_type) return file def _check_download_dir( link: Link, download_dir: str, hashes: Hashes \| None, warn_on_hash_mismatch: bool = True, ) -> str \| None: """Check download_dir for previously downloaded file with correct hash If a correct file is found return its path else None """ download_path = os.path.join(download_dir, link.filename) if not os.path.exists(download_path): return None # If already downloaded, does its hash match? logger.info("File was already downloaded %s", download_path) if hashes: try: hashes.check_against_path(download_path) except HashMismatch: if warn_on_hash_mismatch: logger.warning( "Previously-downloaded file %s has bad hash. Re-downloading.", download_path, ) os.unlink(download_path) return None return download_path class RequirementPreparer: """Prepares a Requirement""" def __init__( # noqa: PLR0913 (too many parameters) self, *, build_dir: str, download_dir: str \| None, src_dir: str, build_isolation: bool, build_isolation_installer: BuildEnvironmentInstaller, check_build_deps: bool, build_tracker: BuildTracker, session: PipSession, progress_bar: BarType, finder: PackageFinder, require_hashes: bool, use_user_site: bool, lazy_wheel: bool, verbosity: int, legacy_resolver: bool, resume_retries: int, ) -> None: super().__init__() self.src_dir = src_dir self.build_dir = build_dir self.build_tracker = build_tracker self._session = session self._download = Downloader(session, progress_bar, resume_retries) self.finder = finder # Where still-packed archives should be written to. If None, they are # not saved, and are deleted immediately after unpacking. self.download_dir = download_dir # Is build isolation allowed? self.build_isolation = build_isolation self.build_env_installer = build_isolation_installer # Should check build dependencies? self.check_build_deps = check_build_deps # Should hash-checking be required? self.require_hashes = require_hashes # Should install in user site-packages? self.use_user_site = use_user_site # Should wheels be downloaded lazily? self.use_lazy_wheel = lazy_wheel # How verbose should underlying tooling be? self.verbosity = verbosity # Are we using the legacy resolver? self.legacy_resolver = legacy_resolver # Memoized downloaded files, as mapping of url: path. self._downloaded: dict[str, str] = {} # Previous "header" printed for a link-based InstallRequirement self._previous_requirement_header = ("", "") def _log_preparing_link(self, req: InstallRequirement) -> None: """Provide context for the requirement being prepared.""" if req.link.is_file and not req.is_wheel_from_cache: message = "Processing %s" information = str(display_path(req.link.file_path)) else: message = "Collecting %s" information = redact_auth_from_requirement(req.req) if req.req else str(req) # If we used req.req, inject requirement source if available (this # would already be included if we used req directly) if req.req and req.comes_from: if isinstance(req.comes_from, str): comes_from: str \| None = req.comes_from else: comes_from = req.comes_from.from_path() if comes_from: information += f" (from {comes_from})" if (message, information) != self._previous_requirement_header: self._previous_requirement_header = (message, information) logger.info(message, information) if req.is_wheel_from_cache: with indent_log(): logger.info("Using cached %s", req.link.filename) def _ensure_link_req_src_dir( self, req: InstallRequirement, parallel_builds: bool ) -> None: """Ensure source_dir of a linked InstallRequirement.""" # Since source_dir is only set for editable requirements. if req.link.is_wheel: # We don't need to unpack wheels, so no need for a source # directory. return assert req.source_dir is None if req.link.is_existing_dir(): # build local directories in-tree req.source_dir = req.link.file_path return # We always delete unpacked sdists after pip runs. req.ensure_has_source_dir( self.build_dir, autodelete=True, parallel_builds=parallel_builds, ) req.ensure_pristine_source_checkout() def _get_linked_req_hashes(self, req: InstallRequirement) -> Hashes: # By the time this is called, the requirement's link should have # been checked so we can tell what kind of requirements req is # and raise some more informative errors than otherwise. # (For example, we can raise VcsHashUnsupported for a VCS URL # rather than HashMissing.) if not self.require_hashes: return req.hashes(trust_internet=True) # We could check these first 2 conditions inside unpack_url # and save repetition of conditions, but then we would # report less-useful error messages for unhashable # requirements, complaining that there's no hash provided. if req.link.is_vcs: raise VcsHashUnsupported() if req.link.is_existing_dir(): raise DirectoryUrlHashUnsupported() # Unpinned packages are asking for trouble when a new version # is uploaded. This isn't a security check, but it saves users # a surprising hash mismatch in the future. # file:/// URLs aren't pinnable, so don't complain about them # not being pinned. if not req.is_direct and not req.is_pinned: raise HashUnpinned() # If known-good hashes are missing for this requirement, # shim it with a facade object that will provoke hash # computation and then raise a HashMissing exception # showing the user what the hash should be. return req.hashes(trust_internet=False) or MissingHashes() def _fetch_metadata_only( self, req: InstallRequirement, ) -> BaseDistribution \| None: if self.legacy_resolver: logger.debug( "Metadata-only fetching is not used in the legacy resolver", ) return None if self.require_hashes: logger.debug( "Metadata-only fetching is not used as hash checking is required", ) return None # Try PEP 658 metadata first, then fall back to lazy wheel if unavailable. return self._fetch_metadata_using_link_data_attr( req ) or self._fetch_metadata_using_lazy_wheel(req.link) def _fetch_metadata_using_link_data_attr( self, req: InstallRequirement, ) -> BaseDistribution \| None: """Fetch metadata from the data-dist-info-metadata attribute, if possible.""" # (1) Get the link to the metadata file, if provided by the backend. metadata_link = req.link.metadata_link() if metadata_link is None: return None assert req.req is not None logger.verbose( "Obtaining dependency information for %s from %s", req.req, metadata_link, ) # (2) Download the contents of the METADATA file, separate from the dist itself. metadata_file = get_http_url( metadata_link, self._download, hashes=metadata_link.as_hashes(), ) with open(metadata_file.path, "rb") as f: metadata_contents = f.read() # (3) Generate a dist just from those file contents. metadata_dist = get_metadata_distribution( metadata_contents, req.link.filename, req.req.name, ) # (4) Ensure the Name: field from the METADATA file matches the name from the # install requirement. # # NB: raw_name will fall back to the name from the install requirement if # the Name: field is not present, but it's noted in the raw_name docstring # that that should NEVER happen anyway. if canonicalize_name(metadata_dist.raw_name) != canonicalize_name(req.req.name): raise MetadataInconsistent( req, "Name", req.req.name, metadata_dist.raw_name ) return metadata_dist def _fetch_metadata_using_lazy_wheel( self, link: Link, ) -> BaseDistribution \| None: """Fetch metadata using lazy wheel, if possible.""" # --use-feature=fast-deps must be provided. if not self.use_lazy_wheel: return None if link.is_file or not link.is_wheel: logger.debug( "Lazy wheel is not used as %r does not point to a remote wheel", link, ) return None wheel = Wheel(link.filename) name = wheel.name logger.info( "Obtaining dependency information from %s %s", name, wheel.version, ) url = link.url.split("#", 1)[0] try: return dist_from_wheel_url(name, url, self._session) except HTTPRangeRequestUnsupported: logger.debug("%s does not support range requests", url) return None def _complete_partial_requirements( self, partially_downloaded_reqs: Iterable[InstallRequirement], parallel_builds: bool = False, ) -> None: """Download any requirements which were only fetched by metadata.""" # Download to a temporary directory. These will be copied over as # needed for downstream 'download', 'wheel', and 'install' commands. temp_dir = TempDirectory(kind="unpack", globally_managed=True).path # Map each link to the requirement that owns it. This allows us to set # `req.local_file_path` on the appropriate requirement after passing # all the links at once into BatchDownloader. links_to_fully_download: dict[Link, InstallRequirement] = {} for req in partially_downloaded_reqs: assert req.link links_to_fully_download[req.link] = req batch_download = self._download.batch(links_to_fully_download.keys(), temp_dir) for link, (filepath, _) in batch_download: logger.debug("Downloading link %s to %s", link, filepath) req = links_to_fully_download[link] # Record the downloaded file path so wheel reqs can extract a Distribution # in .get_dist(). req.local_file_path = filepath # Record that the file is downloaded so we don't do it again in # _prepare_linked_requirement(). self._downloaded[req.link.url] = filepath # If this is an sdist, we need to unpack it after downloading, but the # .source_dir won't be set up until we are in _prepare_linked_requirement(). # Add the downloaded archive to the install requirement to unpack after # preparing the source dir. if not req.is_wheel: req.needs_unpacked_archive(Path(filepath)) # This step is necessary to ensure all lazy wheels are processed # successfully by the 'download', 'wheel', and 'install' commands. for req in partially_downloaded_reqs: self._prepare_linked_requirement(req, parallel_builds) def prepare_linked_requirement( self, req: InstallRequirement, parallel_builds: bool = False ) -> BaseDistribution: """Prepare a requirement to be obtained from req.link.""" assert req.link self._log_preparing_link(req) with indent_log(): # Check if the relevant file is already available # in the download directory file_path = None if self.download_dir is not None and req.link.is_wheel: hashes = self._get_linked_req_hashes(req) file_path = _check_download_dir( req.link, self.download_dir, hashes, # When a locally built wheel has been found in cache, we don't warn # about re-downloading when the already downloaded wheel hash does # not match. This is because the hash must be checked against the # original link, not the cached link. It that case the already # downloaded file will be removed and re-fetched from cache (which # implies a hash check against the cache entry's origin.json). warn_on_hash_mismatch=not req.is_wheel_from_cache, ) if file_path is not None: # The file is already available, so mark it as downloaded self._downloaded[req.link.url] = file_path else: # The file is not available, attempt to fetch only metadata metadata_dist = self._fetch_metadata_only(req) if metadata_dist is not None: req.needs_more_preparation = True req.set_dist(metadata_dist) # Ensure download_info is available even in dry-run mode if req.download_info is None: req.download_info = direct_url_from_link( req.link, req.source_dir ) return metadata_dist # None of the optimizations worked, fully prepare the requirement return self._prepare_linked_requirement(req, parallel_builds) def prepare_linked_requirements_more( self, reqs: Iterable[InstallRequirement], parallel_builds: bool = False ) -> None: """Prepare linked requirements more, if needed.""" reqs = [req for req in reqs if req.needs_more_preparation] for req in reqs: # Determine if any of these requirements were already downloaded. if self.download_dir is not None and req.link.is_wheel: hashes = self._get_linked_req_hashes(req) file_path = _check_download_dir(req.link, self.download_dir, hashes) if file_path is not None: self._downloaded[req.link.url] = file_path req.needs_more_preparation = False # Prepare requirements we found were already downloaded for some # reason. The other downloads will be completed separately. partially_downloaded_reqs: list[InstallRequirement] = [] for req in reqs: if req.needs_more_preparation: partially_downloaded_reqs.append(req) else: self._prepare_linked_requirement(req, parallel_builds) # TODO: separate this part out from RequirementPreparer when the v1 # resolver can be removed! self._complete_partial_requirements( partially_downloaded_reqs, parallel_builds=parallel_builds, ) def _prepare_linked_requirement( self, req: InstallRequirement, parallel_builds: bool ) -> BaseDistribution: assert req.link link = req.link hashes = self._get_linked_req_hashes(req) if hashes and req.is_wheel_from_cache: assert req.download_info is not None assert link.is_wheel assert link.is_file # We need to verify hashes, and we have found the requirement in the cache # of locally built wheels. if ( isinstance(req.download_info.info, ArchiveInfo) and req.download_info.info.hashes and hashes.has_one_of(req.download_info.info.hashes) ): # At this point we know the requirement was built from a hashable source # artifact, and we verified that the cache entry's hash of the original # artifact matches one of the hashes we expect. We don't verify hashes # against the cached wheel, because the wheel is not the original. hashes = None else: logger.warning( "The hashes of the source archive found in cache entry " "don't match, ignoring cached built wheel " "and re-downloading source." ) req.link = req.cached_wheel_source_link link = req.link self._ensure_link_req_src_dir(req, parallel_builds) if link.is_existing_dir(): local_file = None elif link.url not in self._downloaded: try: local_file = unpack_url( link, req.source_dir, self._download, self.verbosity, self.download_dir, hashes, ) except NetworkConnectionError as exc: raise InstallationError( f"Could not install requirement {req} because of HTTP " f"error {exc} for URL {link}" ) else: file_path = self._downloaded[link.url] if hashes: hashes.check_against_path(file_path) local_file = File(file_path, content_type=None) # If download_info is set, we got it from the wheel cache. if req.download_info is None: # Editables don't go through this function (see # prepare_editable_requirement). assert not req.editable req.download_info = direct_url_from_link(link, req.source_dir) # Make sure we have a hash in download_info. If we got it as part of the # URL, it will have been verified and we can rely on it. Otherwise we # compute it from the downloaded file. # FIXME: https://github.com/pypa/pip/issues/11943 if ( isinstance(req.download_info.info, ArchiveInfo) and not req.download_info.info.hashes and local_file ): hash = hash_file(local_file.path)[0].hexdigest() # We populate info.hash for backward compatibility. # This will automatically populate info.hashes. req.download_info.info.hash = f"sha256={hash}" # For use in later processing, # preserve the file path on the requirement. if local_file: req.local_file_path = local_file.path dist = _get_prepared_distribution( req, self.build_tracker, self.build_env_installer, self.build_isolation, self.check_build_deps, ) return dist def save_linked_requirement(self, req: InstallRequirement) -> None: assert self.download_dir is not None assert req.link is not None link = req.link if link.is_vcs or (link.is_existing_dir() and req.editable): # Make a .zip of the source_dir we already created. req.archive(self.download_dir) return if link.is_existing_dir(): logger.debug( "Not copying link to destination directory " "since it is a directory: %s", link, ) return if req.local_file_path is None: # No distribution was downloaded for this requirement. return download_location = os.path.join(self.download_dir, link.filename) if not os.path.exists(download_location): shutil.copy(req.local_file_path, download_location) download_path = display_path(download_location) logger.info("Saved %s", download_path) def prepare_editable_requirement( self, req: InstallRequirement, ) -> BaseDistribution: """Prepare an editable requirement.""" assert req.editable, "cannot prepare a non-editable req as editable" logger.info("Obtaining %s", req) with indent_log(): if self.require_hashes: raise InstallationError( f"The editable requirement {req} cannot be installed when " "requiring hashes, because there is no single file to " "hash." ) req.ensure_has_source_dir(self.src_dir) req.update_editable() assert req.source_dir req.download_info = direct_url_for_editable(req.unpacked_source_directory) dist = _get_prepared_distribution( req, self.build_tracker, self.build_env_installer, self.build_isolation, self.check_build_deps, ) req.check_if_exists(self.use_user_site) return dist def prepare_installed_requirement( self, req: InstallRequirement, skip_reason: str, ) -> BaseDistribution: """Prepare an already-installed requirement.""" assert req.satisfied_by, "req should have been satisfied but isn't" assert skip_reason is not None, ( "did not get skip reason skipped but req.satisfied_by " f"is set to {req.satisfied_by}" ) logger.info( "Requirement %s: %s (%s)", skip_reason, req, req.satisfied_by.version ) with indent_log(): if self.require_hashes: logger.debug( "Since it is already installed, we are trusting this " "package without checking its hash. To ensure a " "completely repeatable environment, install into an " "empty virtualenv." ) return InstalledDistribution(req).get_metadata_distribution()	28.24 KB	2026-01-20 12:58

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