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from __future__ import absolute_import
import logging
import re
import pip
from pip.req import InstallRequirement
from pip.utils import get_installed_distributions
from pip._vendor import pkg_resources
from pip._vendor.packaging.utils import canonicalize_name
from pip._vendor.pkg_resources import RequirementParseError
logger = logging.getLogger(__name__)
def freeze(
requirement=None,
find_links=None, local_only=None, user_only=None, skip_regex=None,
default_vcs=None,
isolated=False,
wheel_cache=None,
skip=()):
find_links = find_links or []
skip_match = None
if skip_regex:
skip_match = re.compile(skip_regex).search
dependency_links = []
for dist in pkg_resources.working_set:
if dist.has_metadata('dependency_links.txt'):
dependency_links.extend(
dist.get_metadata_lines('dependency_links.txt')
)
for link in find_links:
if '#egg=' in link:
dependency_links.append(link)
for link in find_links:
yield '-f %s' % link
installations = {}
for dist in get_installed_distributions(local_only=local_only,
skip=(),
user_only=user_only):
try:
req = pip.FrozenRequirement.from_dist(
dist,
dependency_links
)
except RequirementParseError:
logger.warning(
"Could not parse requirement: %s",
dist.project_name
)
continue
installations[req.name] = req
if requirement:
with open(requirement) as req_file:
for line in req_file:
if (not line.strip() or
line.strip().startswith('#') or
(skip_match and skip_match(line)) or
line.startswith((
'-r', '--requirement',
'-Z', '--always-unzip',
'-f', '--find-links',
'-i', '--index-url',
'--pre',
'--trusted-host',
'--process-dependency-links',
'--extra-index-url'))):
yield line.rstrip()
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 = InstallRequirement.from_editable(
line,
default_vcs=default_vcs,
isolated=isolated,
wheel_cache=wheel_cache,
)
else:
line_req = InstallRequirement.from_line(
line,
isolated=isolated,
wheel_cache=wheel_cache,
)
if not line_req.name:
logger.info(
"Skipping line because it's not clear what it "
"would install: %s",
line.strip(),
)
logger.info(
" (add #egg=PackageName to the URL to avoid"
" this warning)"
)
elif line_req.name not in installations:
logger.warning(
"Requirement file contains %s, but that package is"
" not installed",
line.strip(),
)
else:
yield str(installations[line_req.name]).rstrip()
del installations[line_req.name]
yield(
'## The following requirements were added by '
'pip freeze:'
)
for installation in sorted(
installations.values(), key=lambda x: x.name.lower()):
if canonicalize_name(installation.name) not in skip:
yield str(installation).rstrip()
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