mirror of https://github.com/pypa/pip
234 lines
8.8 KiB
Python
234 lines
8.8 KiB
Python
from __future__ import absolute_import
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import logging
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import os
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import re
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import warnings
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from pip._vendor import pkg_resources
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from pip._vendor.packaging.utils import canonicalize_name
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from pip._vendor.pkg_resources import RequirementParseError
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from pip._internal.exceptions import InstallationError
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from pip._internal.req import InstallRequirement
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from pip._internal.req.req_file import COMMENT_RE
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from pip._internal.utils.deprecation import RemovedInPip11Warning
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from pip._internal.utils.misc import (
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dist_is_editable, get_installed_distributions
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)
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logger = logging.getLogger(__name__)
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def freeze(
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requirement=None,
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find_links=None, local_only=None, user_only=None, skip_regex=None,
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isolated=False,
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wheel_cache=None,
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exclude_editable=False,
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skip=()):
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find_links = find_links or []
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skip_match = None
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if skip_regex:
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skip_match = re.compile(skip_regex).search
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dependency_links = []
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for dist in pkg_resources.working_set:
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if dist.has_metadata('dependency_links.txt'):
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dependency_links.extend(
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dist.get_metadata_lines('dependency_links.txt')
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)
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for link in find_links:
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if '#egg=' in link:
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dependency_links.append(link)
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for link in find_links:
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yield '-f %s' % link
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installations = {}
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for dist in get_installed_distributions(local_only=local_only,
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skip=(),
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user_only=user_only):
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try:
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req = FrozenRequirement.from_dist(
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dist,
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dependency_links
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)
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except RequirementParseError:
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logger.warning(
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"Could not parse requirement: %s",
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dist.project_name
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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.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()
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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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(skip_match and skip_match(line)) or
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line.startswith((
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'-r', '--requirement',
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'-Z', '--always-unzip',
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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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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 = InstallRequirement.from_editable(
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line,
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isolated=isolated,
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wheel_cache=wheel_cache,
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)
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else:
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line_req = InstallRequirement.from_line(
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COMMENT_RE.sub('', line).strip(),
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isolated=isolated,
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wheel_cache=wheel_cache,
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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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elif line_req.name not in installations:
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logger.warning(
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"Requirement file [%s] contains %s, but that "
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"package is not installed",
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req_file_path, COMMENT_RE.sub('', line).strip(),
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)
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else:
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yield str(installations[line_req.name]).rstrip()
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del installations[line_req.name]
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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 canonicalize_name(installation.name) not in skip:
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yield str(installation).rstrip()
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class FrozenRequirement(object):
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def __init__(self, name, req, editable, comments=()):
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self.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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_rev_re = re.compile(r'-r(\d+)$')
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_date_re = re.compile(r'-(20\d\d\d\d\d\d)$')
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@classmethod
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def from_dist(cls, dist, dependency_links):
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location = os.path.normcase(os.path.abspath(dist.location))
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comments = []
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from pip._internal.vcs import vcs, get_src_requirement
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if dist_is_editable(dist) and vcs.get_backend_name(location):
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editable = True
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try:
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req = get_src_requirement(dist, location)
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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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req = None
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if req is None:
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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.append(
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'## !! Could not determine repository location'
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)
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req = dist.as_requirement()
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editable = False
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else:
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editable = False
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req = dist.as_requirement()
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specs = req.specs
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assert len(specs) == 1 and specs[0][0] in ["==", "==="], \
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'Expected 1 spec with == or ===; specs = %r; dist = %r' % \
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(specs, dist)
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version = specs[0][1]
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ver_match = cls._rev_re.search(version)
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date_match = cls._date_re.search(version)
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if ver_match or date_match:
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svn_backend = vcs.get_backend('svn')
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if svn_backend:
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svn_location = svn_backend().get_location(
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dist,
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dependency_links,
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)
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if not svn_location:
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logger.warning(
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'Warning: cannot find svn location for %s', req)
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comments.append(
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'## FIXME: could not find svn URL in dependency_links '
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'for this package:'
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)
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else:
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warnings.warn(
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"SVN editable detection based on dependency links "
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"will be dropped in the future.",
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RemovedInPip11Warning,
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)
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comments.append(
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'# Installing as editable to satisfy requirement %s:' %
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req
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)
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if ver_match:
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rev = ver_match.group(1)
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else:
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rev = '{%s}' % date_match.group(1)
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editable = True
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req = '%s@%s#egg=%s' % (
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svn_location,
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rev,
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cls.egg_name(dist)
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)
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return cls(dist.project_name, req, editable, comments)
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@staticmethod
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def egg_name(dist):
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name = dist.egg_name()
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match = re.search(r'-py\d\.\d$', name)
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if match:
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name = name[:match.start()]
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return name
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def __str__(self):
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req = self.req
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if self.editable:
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req = '-e %s' % req
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return '\n'.join(list(self.comments) + [str(req)]) + '\n'
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