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freeze.py
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import collections import logging import os from typing import Container, Dict, Generator, Iterable, List, NamedTuple, Optional, Set from pip._vendor.packaging.utils import canonicalize_name from pip._vendor.packaging.version import Version 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: Optional[List[str]] = None, local_only: bool = False, user_only: bool = False, paths: Optional[List[str]] = 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") or line.startswith("--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: dist_version = dist.version if isinstance(dist_version, Version): return f"{dist.raw_name}=={dist_version}" 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"], ) class FrozenRequirement: def __init__( self, name: str, req: str, editable: bool, comments: Iterable[str] = (), ) -> None: self.name = name self.canonical_name = canonicalize_name(name) self.req = req self.editable = editable self.comments = comments @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"