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265 lines
9.8 KiB
Python
265 lines
9.8 KiB
Python
3 years ago
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import collections
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import logging
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import os
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from typing import (
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Container,
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Dict,
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Iterable,
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Iterator,
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List,
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Optional,
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Set,
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Tuple,
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Union,
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)
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from pip._vendor.packaging.utils import canonicalize_name
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from pip._vendor.pkg_resources import Distribution, Requirement, RequirementParseError
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from pip._internal.exceptions import BadCommand, InstallationError
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from pip._internal.req.constructors import (
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install_req_from_editable,
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install_req_from_line,
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)
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from pip._internal.req.req_file import COMMENT_RE
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from pip._internal.utils.direct_url_helpers import (
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direct_url_as_pep440_direct_reference,
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dist_get_direct_url,
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)
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from pip._internal.utils.misc import dist_is_editable, get_installed_distributions
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logger = logging.getLogger(__name__)
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RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]]
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def freeze(
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requirement=None, # type: Optional[List[str]]
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find_links=None, # type: Optional[List[str]]
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local_only=False, # type: bool
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user_only=False, # type: bool
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paths=None, # type: Optional[List[str]]
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isolated=False, # type: bool
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exclude_editable=False, # type: bool
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skip=() # type: Container[str]
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):
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# type: (...) -> Iterator[str]
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find_links = find_links or []
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for link in find_links:
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yield f'-f {link}'
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installations = {} # type: Dict[str, FrozenRequirement]
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for dist in get_installed_distributions(
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local_only=local_only,
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skip=(),
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user_only=user_only,
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paths=paths
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):
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try:
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req = FrozenRequirement.from_dist(dist)
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except RequirementParseError as exc:
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# We include dist rather than dist.project_name because the
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# dist string includes more information, like the version and
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# location. We also include the exception message to aid
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# troubleshooting.
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logger.warning(
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'Could not generate requirement for distribution %r: %s',
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dist, exc
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)
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continue
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if exclude_editable and req.editable:
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continue
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installations[req.canonical_name] = req
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if requirement:
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# the options that don't get turned into an InstallRequirement
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# should only be emitted once, even if the same option is in multiple
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# requirements files, so we need to keep track of what has been emitted
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# so that we don't emit it again if it's seen again
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emitted_options = set() # type: Set[str]
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# keep track of which files a requirement is in so that we can
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# give an accurate warning if a requirement appears multiple times.
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req_files = collections.defaultdict(list) # type: Dict[str, List[str]]
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for req_file_path in requirement:
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with open(req_file_path) as req_file:
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for line in req_file:
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if (not line.strip() or
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line.strip().startswith('#') or
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line.startswith((
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'-r', '--requirement',
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'-f', '--find-links',
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'-i', '--index-url',
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'--pre',
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'--trusted-host',
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'--process-dependency-links',
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'--extra-index-url',
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'--use-feature'))):
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line = line.rstrip()
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if line not in emitted_options:
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emitted_options.add(line)
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yield line
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continue
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if line.startswith('-e') or line.startswith('--editable'):
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if line.startswith('-e'):
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line = line[2:].strip()
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else:
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line = line[len('--editable'):].strip().lstrip('=')
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line_req = install_req_from_editable(
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line,
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isolated=isolated,
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)
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else:
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line_req = install_req_from_line(
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COMMENT_RE.sub('', line).strip(),
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isolated=isolated,
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)
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if not line_req.name:
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logger.info(
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"Skipping line in requirement file [%s] because "
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"it's not clear what it would install: %s",
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req_file_path, line.strip(),
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)
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logger.info(
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" (add #egg=PackageName to the URL to avoid"
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" this warning)"
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)
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else:
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line_req_canonical_name = canonicalize_name(
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line_req.name)
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if line_req_canonical_name not in installations:
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# either it's not installed, or it is installed
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# but has been processed already
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if not req_files[line_req.name]:
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logger.warning(
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"Requirement file [%s] contains %s, but "
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"package %r is not installed",
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req_file_path,
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COMMENT_RE.sub('', line).strip(),
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line_req.name
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)
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else:
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req_files[line_req.name].append(req_file_path)
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else:
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yield str(installations[
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line_req_canonical_name]).rstrip()
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del installations[line_req_canonical_name]
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req_files[line_req.name].append(req_file_path)
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# Warn about requirements that were included multiple times (in a
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# single requirements file or in different requirements files).
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for name, files in req_files.items():
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if len(files) > 1:
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logger.warning("Requirement %s included multiple times [%s]",
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name, ', '.join(sorted(set(files))))
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yield(
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'## The following requirements were added by '
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'pip freeze:'
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)
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for installation in sorted(
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installations.values(), key=lambda x: x.name.lower()):
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if installation.canonical_name not in skip:
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yield str(installation).rstrip()
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def get_requirement_info(dist):
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# type: (Distribution) -> RequirementInfo
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"""
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Compute and return values (req, editable, comments) for use in
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FrozenRequirement.from_dist().
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"""
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if not dist_is_editable(dist):
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return (None, False, [])
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location = os.path.normcase(os.path.abspath(dist.location))
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from pip._internal.vcs import RemoteNotFoundError, vcs
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vcs_backend = vcs.get_backend_for_dir(location)
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if vcs_backend is None:
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req = dist.as_requirement()
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logger.debug(
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'No VCS found for editable requirement "%s" in: %r', req,
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location,
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)
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comments = [
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f'# Editable install with no version control ({req})'
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]
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return (location, True, comments)
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try:
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req = vcs_backend.get_src_requirement(location, dist.project_name)
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except RemoteNotFoundError:
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req = dist.as_requirement()
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comments = [
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'# Editable {} install with no remote ({})'.format(
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type(vcs_backend).__name__, req,
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)
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]
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return (location, True, comments)
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except BadCommand:
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logger.warning(
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'cannot determine version of editable source in %s '
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'(%s command not found in path)',
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location,
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vcs_backend.name,
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)
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return (None, True, [])
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except InstallationError as exc:
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logger.warning(
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"Error when trying to get requirement for VCS system %s, "
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"falling back to uneditable format", exc
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)
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else:
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return (req, True, [])
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logger.warning(
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'Could not determine repository location of %s', location
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)
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comments = ['## !! Could not determine repository location']
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return (None, False, comments)
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class FrozenRequirement:
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def __init__(self, name, req, editable, comments=()):
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# type: (str, Union[str, Requirement], bool, Iterable[str]) -> None
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self.name = name
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self.canonical_name = canonicalize_name(name)
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self.req = req
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self.editable = editable
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self.comments = comments
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@classmethod
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def from_dist(cls, dist):
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# type: (Distribution) -> FrozenRequirement
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# TODO `get_requirement_info` is taking care of editable requirements.
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# TODO This should be refactored when we will add detection of
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# editable that provide .dist-info metadata.
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req, editable, comments = get_requirement_info(dist)
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if req is None and not editable:
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# if PEP 610 metadata is present, attempt to use it
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direct_url = dist_get_direct_url(dist)
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if direct_url:
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req = direct_url_as_pep440_direct_reference(
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direct_url, dist.project_name
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)
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comments = []
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if req is None:
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# name==version requirement
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req = dist.as_requirement()
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return cls(dist.project_name, req, editable, comments=comments)
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def __str__(self):
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# type: () -> str
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req = self.req
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if self.editable:
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req = f'-e {req}'
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return '\n'.join(list(self.comments) + [str(req)]) + '\n'
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