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pantsbuild / pants / 19381742489

15 Nov 2025 12:52AM UTC coverage: 49.706% (-30.6%) from 80.29%
19381742489

Pull #22890

github

web-flow
Merge d961abf79 into 42e1ebd41
Pull Request #22890: Updated all python subsystem constraints to 3.14

4 of 5 new or added lines in 5 files covered. (80.0%)

14659 existing lines in 485 files now uncovered.

31583 of 63540 relevant lines covered (49.71%)

0.79 hits per line

Source File
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45.76
/src/python/pants/backend/python/util_rules/lockfile_diff.py
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# Copyright 2022 Pants project contributors (see CONTRIBUTORS.md).
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# Licensed under the Apache License, Version 2.0 (see LICENSE).
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from __future__ import annotations
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import itertools
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import json
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import logging
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from collections.abc import Mapping
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from dataclasses import dataclass
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from typing import Any
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from packaging.version import Version, parse
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from pants.backend.python.util_rules.pex_requirements import (
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    LoadedLockfileRequest,
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    Lockfile,
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    load_lockfile,
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    strip_comments_from_pex_json_lockfile,
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)
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from pants.base.exceptions import EngineError
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from pants.core.goals.generate_lockfiles import LockfileDiff, LockfilePackages, PackageName
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from pants.engine.fs import Digest
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from pants.engine.intrinsics import get_digest_contents
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from pants.engine.rules import implicitly
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from pants.util.frozendict import FrozenDict
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logger = logging.getLogger(__name__)
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@dataclass(frozen=True, order=True)
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class PythonRequirementVersion:
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    _parsed: Version
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    @classmethod
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    def parse(cls, version: str) -> PythonRequirementVersion:
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        return cls(parse(version))
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    def __str__(self) -> str:
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        return str(self._parsed)
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    def __getattr__(self, key: str) -> Any:
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        return getattr(self._parsed, key)
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def _pex_lockfile_requirements(
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    lockfile_data: Mapping[str, Any] | None, path: str | None = None
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) -> LockfilePackages:
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    if not lockfile_data:
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        return LockfilePackages({})
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    try:
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        # Setup generators
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        locked_resolves = (
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            (
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                (PackageName(r["project_name"]), PythonRequirementVersion.parse(r["version"]))
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                for r in resolve["locked_requirements"]
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            )
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            for resolve in lockfile_data["locked_resolves"]
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        )
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        requirements = dict(itertools.chain.from_iterable(locked_resolves))
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    except KeyError as e:
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        if path:
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            logger.warning(f"{path}: Failed to parse lockfile: {e}")
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        requirements = {}
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    return LockfilePackages(requirements)
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async def _parse_lockfile(lockfile: Lockfile) -> FrozenDict[str, Any] | None:
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    try:
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        loaded = await load_lockfile(LoadedLockfileRequest(lockfile), **implicitly())
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        fc = await get_digest_contents(loaded.lockfile_digest)
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        parsed = await _parse_lockfile_content(next(iter(fc)).content, lockfile.url)
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        return parsed
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    except EngineError:
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        # May fail in case the file doesn't exist, which is expected when parsing the "old" lockfile
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        # the first time a new lockfile is generated.
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        return None
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async def _parse_lockfile_content(content: bytes, url: str) -> FrozenDict[str, Any] | None:
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    try:
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        parsed_lockfile = json.loads(content)
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        return FrozenDict.deep_freeze(parsed_lockfile)
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    except json.JSONDecodeError as e:
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        logger.debug(f"{url}: Failed to parse lockfile contents: {e}")
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        return None
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async def _generate_python_lockfile_diff(
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    digest: Digest, resolve_name: str, path: str
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) -> LockfileDiff:
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    new_digest_contents = await get_digest_contents(digest)
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    new_content = next(c for c in new_digest_contents if c.path == path).content
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    new_content = strip_comments_from_pex_json_lockfile(new_content)
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    new = await _parse_lockfile_content(new_content, path)
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    old = await _parse_lockfile(
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        Lockfile(
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            url=path,
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            url_description_of_origin="existing lockfile",
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            resolve_name=resolve_name,
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        )
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    )
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    return LockfileDiff.create(
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        path=path,
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        resolve_name=resolve_name,
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        old=_pex_lockfile_requirements(old),
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        new=_pex_lockfile_requirements(new, path),
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    )
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