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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:
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"
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