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pantsbuild / pants / 20632486505

01 Jan 2026 04:21AM UTC coverage: 43.231% (-37.1%) from 80.281%
20632486505

Pull #22962

github

web-flow
Merge 08d5c63b0 into f52ab6675
Pull Request #22962: Bump the gha-deps group across 1 directory with 6 updates

26122 of 60424 relevant lines covered (43.23%)

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77.27
/src/python/pants/core/goals/resolves.py
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# Copyright 2024 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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from enum import Enum
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from typing import TypeVar
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from pants.engine.unions import UnionMembership, union
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from pants.util.strutil import softwrap
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T = TypeVar("T", bound="ExportableTool")
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class ExportMode(Enum):
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    """How this tool should be exported.
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    resolve: in a language-based resolve
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    binary: as a single binary
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    """
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    resolve = "resolve"
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    binary = "binary"
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@union
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class ExportableTool:
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    """Mark a subsystem as exportable.
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    Using this class has 2 parts:
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    - The tool class should subclass this.
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      This can be done at the language-backend level, for example, `PythonToolRequirementsBase`.
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      The help message can be extended with instructions specific to that tool or language backend
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    - Each exportable tool should have a `UnionRule` to `ExportableTool`.
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      This `UnionRule` is what ties the class into the export machinery.
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    """
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    options_scope: str
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    export_mode: ExportMode = ExportMode.resolve
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    @classmethod
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    def help_for_generate_lockfile_with_default_location(cls, resolve_name: str):
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        """If this tool is configured to use the default lockfile, but a user requests to regenerate
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        it, this help text will be shown to the user."""
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        resolve = resolve_name
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        return softwrap(
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            f"""
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            You requested to generate a lockfile for {resolve} because
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            you included it in `--generate-lockfiles-resolve`, but
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            {resolve} is a tool using its default lockfile.
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        """
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        )
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    @staticmethod
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    def filter_for_subclasses(
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        union_membership: UnionMembership, parent_class: type[T]
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    ) -> dict[str, type[T]]:
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        """Find all ExportableTools that are members of `parent_class`.
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        Language backends can use this to obtain all tools they can export.
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        """
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        exportable_tools = union_membership.get(ExportableTool)
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        relevant_tools: dict[str, type[T]] = {
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            e.options_scope: e  # type: ignore # mypy isn't narrowing with `issubclass`
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            for e in exportable_tools
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            if issubclass(e, parent_class)
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        }
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        return relevant_tools
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