26380816428

Committed 25 May 2026 02:57AM UTC coverage: 52.312% (-40.6%) from 92.89%

Build # 26380816428

Build Type

Pull #23368

github

Committed by

web-flow

Commit Message

Merge 7410b48e1 into 7b1060c81

Pull Request Pull Request #23368: Run Linux ARM CI on Depot runners (Cherry-pick of #23363)

Coverage Stats

31807 of 60802 relevant lines covered (52.31%)

1.05 hits per line

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0.0

/src/python/pants/backend/tools/preamble/subsystem.py

# Copyright 2022 Pants project contributors (see CONTRIBUTORS.md).
# Licensed under the Apache License, Version 2.0 (see LICENSE).
from __future__ import annotations

from collections.abc import Sequence

from pants.option.option_types import DictOption, SkipOption
from pants.option.subsystem import Subsystem
from pants.source.filespec import FilespecMatcher
from pants.util.strutil import help_text, softwrap


class PreambleSubsystem(Subsystem):
    options_scope = "preamble"
    name = "preamble"
    help = help_text(
        """
        Formats files with a preamble, with the preamble looked up based on path.

        This is useful for things such as copyright headers or shebang lines.

        Pants substitutes the following identifiers (following Python's `string.Template` substitutions):
        - $year: The current year (only used when actually writing the year to the file).
        """
    )

    skip = SkipOption("fmt")

    _template_by_globs = DictOption[str](
        help=softwrap(
            """
            Which preamble template to use based on the path globs (relative to the build root).

            Example:

                {
                    '*.rs': '// Copyright (c) $year\\n// Line 2\\n'
                    '*.py:!__init__.py': '# Copyright (c) $year\\n# Line 2\\n',
                }

            It might be helpful to load this config from a JSON or YAML file. To do that, set
            `[preamble].config = '@path/to/config.yaml'`, for example.
            """
        ),
        fromfile=True,
    )

    @property
    def template_by_globs(self) -> dict[tuple[str, ...], str]:
        return {tuple(key.split(":")): value for key, value in self._template_by_globs.items()}

    def get_template_by_path(self, filepaths: Sequence[str]) -> dict[str, str]:
        """Returns a mapping from path to (most-relevant) template."""
        filepaths_to_test = set(filepaths)
        template_by_path = {}
        for globs, template in self.template_by_globs.items():
            if not filepaths_to_test:
                break

            matched_filepaths = FilespecMatcher(
                includes=[
                    (glob[2:] if glob.startswith(r"\\!") else glob)
                    for glob in globs
                    if not glob.startswith("!")
                ],
                excludes=[glob[1:] for glob in globs if glob.startswith("!")],
            ).matches(tuple(filepaths_to_test))
            filepaths_to_test -= set(matched_filepaths)
            for filepath in matched_filepaths:
                template_by_path[filepath] = template

        return template_by_path

1	# Copyright 2022 Pants project contributors (see CONTRIBUTORS.md).
2	# Licensed under the Apache License, Version 2.0 (see LICENSE).
3	from __future__ import annotations	×
4
5	from collections.abc import Sequence	×
6
7	from pants.option.option_types import DictOption, SkipOption	×
8	from pants.option.subsystem import Subsystem	×
9	from pants.source.filespec import FilespecMatcher	×
10	from pants.util.strutil import help_text, softwrap	×
11
12
13	class PreambleSubsystem(Subsystem):	×
14	options_scope = "preamble"	×
15	name = "preamble"	×
16	help = help_text(	×
17	"""
18	Formats files with a preamble, with the preamble looked up based on path.
19
20	This is useful for things such as copyright headers or shebang lines.
21
22	Pants substitutes the following identifiers (following Python's `string.Template` substitutions):
23	- $year: The current year (only used when actually writing the year to the file).
24	"""
25	)
26
27	skip = SkipOption("fmt")	×
28
29	_template_by_globs = DictOption[str](	×
30	help=softwrap(
31	"""
32	Which preamble template to use based on the path globs (relative to the build root).
33
34	Example:
35
36	{
37	'*.rs': '// Copyright (c) $year\\n// Line 2\\n'
38	'*.py:!__init__.py': '# Copyright (c) $year\\n# Line 2\\n',
39	}
40
41	It might be helpful to load this config from a JSON or YAML file. To do that, set
42	`[preamble].config = '@path/to/config.yaml'`, for example.
43	"""
44	),
45	fromfile=True,
46	)
47
48	@property	×
49	def template_by_globs(self) -> dict[tuple[str, ...], str]:	×
50	return {tuple(key.split(":")): value for key, value in self._template_by_globs.items()}	×
51
52	def get_template_by_path(self, filepaths: Sequence[str]) -> dict[str, str]:	×
53	"""Returns a mapping from path to (most-relevant) template."""
54	filepaths_to_test = set(filepaths)	×
55	template_by_path = {}	×
56	for globs, template in self.template_by_globs.items():	×
57	if not filepaths_to_test:	×
58	break	×
59
60	matched_filepaths = FilespecMatcher(	×
61	includes=[
62	(glob[2:] if glob.startswith(r"\\!") else glob)
63	for glob in globs
64	if not glob.startswith("!")
65	],
66	excludes=[glob[1:] for glob in globs if glob.startswith("!")],
67	).matches(tuple(filepaths_to_test))
68	filepaths_to_test -= set(matched_filepaths)	×
69	for filepath in matched_filepaths:	×
70	template_by_path[filepath] = template	×
71
72	return template_by_path	×

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