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# Licensed under the Apache License, Version 2.0 (the "License");
# http://www.apache.org/licenses/LICENSE-2.0
#
import re
from collections.abc import Iterable, Iterator
from distutils.version import LooseVersion
from pathlib import Path
from typing import Any, Optional, Union
from pkg_resources import Requirement, yield_lines # type: ignore[import-untyped]
class _RequirementWithComment(Requirement):
strict_string = "# strict"
def __init__(self, *args: Any, comment: str = "", pip_argument: Optional[str] = None, **kwargs: Any) -> None:
super().__init__(*args, **kwargs)
self.comment = comment
if not (pip_argument is None or pip_argument): # sanity check that it's not an empty str
raise RuntimeError(f"wrong pip argument: {pip_argument}")
self.pip_argument = pip_argument
self.strict = self.strict_string in comment.lower()
def adjust(self, unfreeze: str) -> str:
"""Remove version restrictions unless they are strict.
>>> _RequirementWithComment("arrow<=1.2.2,>=1.2.0", comment="# anything").adjust("none")
'arrow<=1.2.2,>=1.2.0'
>>> _RequirementWithComment("arrow<=1.2.2,>=1.2.0", comment="# strict").adjust("none")
'arrow<=1.2.2,>=1.2.0 # strict'
>>> _RequirementWithComment("arrow<=1.2.2,>=1.2.0", comment="# my name").adjust("all")
'arrow>=1.2.0'
>>> _RequirementWithComment("arrow>=1.2.0, <=1.2.2", comment="# strict").adjust("all")
'arrow<=1.2.2,>=1.2.0 # strict'
>>> _RequirementWithComment("arrow").adjust("all")
'arrow'
>>> _RequirementWithComment("arrow>=1.2.0, <=1.2.2", comment="# cool").adjust("major")
'arrow<2.0,>=1.2.0'
>>> _RequirementWithComment("arrow>=1.2.0, <=1.2.2", comment="# strict").adjust("major")
'arrow<=1.2.2,>=1.2.0 # strict'
>>> _RequirementWithComment("arrow>=1.2.0").adjust("major")
'arrow>=1.2.0'
>>> _RequirementWithComment("arrow").adjust("major")
'arrow'
"""
out = str(self)
if self.strict:
return f"{out} {self.strict_string}"
if unfreeze == "major":
for operator, version in self.specs:
if operator in ("<", "<="):
major = LooseVersion(version).version[0]
# replace upper bound with major version increased by one
return out.replace(f"{operator}{version}", f"<{int(major) + 1}.0")
elif unfreeze == "all":
for operator, version in self.specs:
if operator in ("<", "<="):
# drop upper bound
return out.replace(f"{operator}{version},", "")
elif unfreeze != "none":
raise ValueError(f"Unexpected unfreeze: {unfreeze!r} value.")
return out
def _parse_requirements(strs: Union[str, Iterable[str]]) -> Iterator[_RequirementWithComment]:
r"""Adapted from `pkg_resources.parse_requirements` to include comments.
>>> txt = ['# ignored', '', 'this # is an', '--piparg', 'example', 'foo # strict', 'thing', '-r different/file.txt']
>>> [r.adjust('none') for r in _parse_requirements(txt)]
['this', 'example', 'foo # strict', 'thing']
>>> txt = '\\n'.join(txt)
>>> [r.adjust('none') for r in _parse_requirements(txt)]
['this', 'example', 'foo # strict', 'thing']
"""
lines = yield_lines(strs)
pip_argument = None
for line in lines:
# Drop comments -- a hash without a space may be in a URL.
if " #" in line:
comment_pos = line.find(" #")
line, comment = line[:comment_pos], line[comment_pos:]
else:
comment = ""
# If there is a line continuation, drop it, and append the next line.
if line.endswith("\\"):
line = line[:-2].strip()
try:
line += next(lines)
except StopIteration:
return
# If there's a pip argument, save it
if line.startswith("--"):
pip_argument = line
continue
if line.startswith("-r "):
# linked requirement files are unsupported
continue
if "@" in line or re.search("https?://", line):
# skip lines with links like `pesq @ git+https://github.com/ludlows/python-pesq`
continue
yield _RequirementWithComment(line, comment=comment, pip_argument=pip_argument)
pip_argument = None
def load_requirements(path_dir: str, file_name: str = "base.txt", unfreeze: str = "all") -> list[str]:
"""Load requirements from a file.
>>> import os
>>> from lightning_utilities import _PROJECT_ROOT
>>> path_req = os.path.join(_PROJECT_ROOT, "requirements")
>>> load_requirements(path_req, "docs.txt", unfreeze="major") # doctest: +ELLIPSIS +NORMALIZE_WHITESPACE
['sphinx<6.0,>=4.0', ...]
"""
if unfreeze not in {"none", "major", "all"}:
raise ValueError(f'unsupported option of "{unfreeze}"')
path = Path(path_dir) / file_name
if not path.exists():
raise FileNotFoundError(f"missing file for {(path_dir, file_name, path)}")
text = path.read_text()
return [req.adjust(unfreeze) for req in _parse_requirements(text)]
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