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# The following comment should be removed at some point in the future. # mypy: strict-optional=False # mypy: disallow-untyped-defs=False from __future__ import absolute_import import collections import logging import os from pip._vendor import six from pip._vendor.packaging.utils import canonicalize_name from pip._vendor.pkg_resources import RequirementParseError from pip._internal.exceptions import BadCommand, InstallationError 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, dist_get_direct_url, ) from pip._internal.utils.misc import ( dist_is_editable, get_installed_distributions, ) from pip._internal.utils.typing import MYPY_CHECK_RUNNING if MYPY_CHECK_RUNNING: from typing import ( Iterator, Optional, List, Container, Set, Dict, Tuple, Iterable, Union ) from pip._internal.cache import WheelCache from pip._vendor.pkg_resources import ( Distribution, Requirement ) RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]] logger = logging.getLogger(__name__) def freeze( requirement=None, # type: Optional[List[str]] find_links=None, # type: Optional[List[str]] local_only=None, # type: Optional[bool] user_only=None, # type: Optional[bool] paths=None, # type: Optional[List[str]] isolated=False, # type: bool wheel_cache=None, # type: Optional[WheelCache] exclude_editable=False, # type: bool skip=() # type: Container[str] ): # type: (...) -> Iterator[str] find_links = find_links or [] for link in find_links: yield '-f {}'.format(link) installations = {} # type: Dict[str, FrozenRequirement] for dist in get_installed_distributions(local_only=local_only, skip=(), user_only=user_only, paths=paths): try: req = FrozenRequirement.from_dist(dist) except RequirementParseError as exc: # We include dist rather than dist.project_name because the # dist string includes more information, like the version and # location. We also include the exception message to aid # troubleshooting. logger.warning( 'Could not generate requirement for distribution %r: %s', dist, exc ) continue 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() # type: Set[str] # 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 = collections.defaultdict(list) # type: Dict[str, List[str]] 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', '-Z', '--always-unzip', '-f', '--find-links', '-i', '--index-url', '--pre', '--trusted-host', '--process-dependency-links', '--extra-index-url'))): 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 six.iteritems(req_files): 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 get_requirement_info(dist): # type: (Distribution) -> RequirementInfo """ Compute and return values (req, editable, comments) for use in FrozenRequirement.from_dist(). """ if not dist_is_editable(dist): return (None, False, []) location = os.path.normcase(os.path.abspath(dist.location)) from pip._internal.vcs import vcs, RemoteNotFoundError vcs_backend = vcs.get_backend_for_dir(location) if vcs_backend is None: req = dist.as_requirement() logger.debug( 'No VCS found for editable requirement "%s" in: %r', req, location, ) comments = [ '# Editable install with no version control ({})'.format(req) ] return (location, True, comments) try: req = vcs_backend.get_src_requirement(location, dist.project_name) except RemoteNotFoundError: req = dist.as_requirement() comments = [ '# Editable {} install with no remote ({})'.format( type(vcs_backend).__name__, req, ) ] return (location, True, comments) except BadCommand: logger.warning( 'cannot determine version of editable source in %s ' '(%s command not found in path)', location, vcs_backend.name, ) return (None, True, []) except InstallationError as exc: logger.warning( "Error when trying to get requirement for VCS system %s, " "falling back to uneditable format", exc ) else: if req is not None: return (req, True, []) logger.warning( 'Could not determine repository location of %s', location ) comments = ['## !! Could not determine repository location'] return (None, False, comments) class FrozenRequirement(object): def __init__(self, name, req, editable, comments=()): # type: (str, Union[str, Requirement], bool, 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): # type: (Distribution) -> FrozenRequirement # TODO `get_requirement_info` is taking care of editable requirements. # TODO This should be refactored when we will add detection of # editable that provide .dist-info metadata. req, editable, comments = get_requirement_info(dist) if req is None and not editable: # if PEP 610 metadata is present, attempt to use it direct_url = dist_get_direct_url(dist) if direct_url: req = direct_url_as_pep440_direct_reference( direct_url, dist.project_name ) comments = [] if req is None: # name==version requirement req = dist.as_requirement() return cls(dist.project_name, req, editable, comments=comments) def __str__(self): req = self.req if self.editable: req = '-e {}'.format(req) return '\n'.join(list(self.comments) + [str(req)]) + '\n'