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pantsbuild / pants / 19015773527

02 Nov 2025 05:33PM UTC coverage: 17.872% (-62.4%) from 80.3%
19015773527

Pull #22816

github

web-flow
Merge a12d75757 into 6c024e162
Pull Request #22816: Update Pants internal Python to 3.14

4 of 5 new or added lines in 3 files covered. (80.0%)

28452 existing lines in 683 files now uncovered.

9831 of 55007 relevant lines covered (17.87%)

0.18 hits per line

Source File
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43.9
/src/python/pants/backend/python/util_rules/ancestor_files.py
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# Copyright 2020 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 os
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from dataclasses import dataclass
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from pants.engine.fs import EMPTY_SNAPSHOT, PathGlobs, Snapshot
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from pants.engine.intrinsics import digest_to_snapshot, get_digest_contents
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from pants.engine.rules import collect_rules, implicitly, rule
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@dataclass(frozen=True)
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class AncestorFilesRequest:
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    """A request for ancestor files of the given names.
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    "Ancestor files" means all files with one of the given names that are siblings of, or in parent
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    directories of, a `.py` or `.pyi` file in the input_files.
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    """
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    input_files: tuple[str, ...]
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    requested: tuple[str, ...]
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    ignore_empty_files: bool = False
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@dataclass(frozen=True)
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class AncestorFiles:
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    """Any ancestor files found."""
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    snapshot: Snapshot
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def putative_ancestor_files(input_files: tuple[str, ...], requested: tuple[str, ...]) -> set[str]:
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    """Return the paths of potentially missing ancestor files.
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    NB: The sources are expected to not have had their source roots stripped.
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    Therefore this function will consider superfluous files at and above the source roots,
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    (e.g., src/python/<name>, src/<name>). It is the caller's responsibility to filter these
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    out if necessary.
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    """
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    packages: set[str] = set()
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    for input_file in input_files:
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        if not input_file.endswith((".py", ".pyi")):
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            continue
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        pkg_dir = os.path.dirname(input_file)
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        if pkg_dir in packages:
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            continue
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        package = ""
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        packages.add(package)
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        for component in pkg_dir.split(os.sep):
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            package = os.path.join(package, component)
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            packages.add(package)
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    return {
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        os.path.join(package, requested_f) for package in packages for requested_f in requested
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    } - set(input_files)
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@rule
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async def find_ancestor_files(request: AncestorFilesRequest) -> AncestorFiles:
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    putative = putative_ancestor_files(request.input_files, request.requested)
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    if not putative:
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        return AncestorFiles(EMPTY_SNAPSHOT)
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    # NB: This will intentionally _not_ error on any unmatched globs.
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    globs = PathGlobs(putative)
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    if request.ignore_empty_files:
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        digest_contents = await get_digest_contents(**implicitly({globs: PathGlobs}))
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        snapshot = await digest_to_snapshot(
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            **implicitly(PathGlobs([fc.path for fc in digest_contents if fc.content.strip()]))
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        )
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    else:
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        snapshot = await digest_to_snapshot(**implicitly({globs: PathGlobs}))
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    return AncestorFiles(snapshot)
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def rules():
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    return collect_rules()
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