20147226056

Committed 11 Dec 2025 08:58PM UTC coverage: 78.827% (-1.5%) from 80.293%

Build # 20147226056

Build Type

push

github

Committed by

web-flow

Commit Message

Forwarded the `style` and `complete-platform` args from pants.toml to PEX (#22910)

## Context

After Apple switched to the `arm64` architecture, some package
publishers stopped releasing `x86_64` variants of their packages for
`darwin`. As a result, generating a universal lockfile now fails because
no single package version is compatible with both `x86_64` and `arm64`
on `darwin`.

The solution is to use the `--style` and `--complete-platform` flags
with PEX. For example:
```
pex3 lock create \
    --style strict \
    --complete-platform 3rdparty/platforms/manylinux_2_28_aarch64.json \
    --complete-platform 3rdparty/platforms/macosx_26_0_arm64.json \
    -r 3rdparty/python/requirements_pyarrow.txt \
    -o python-pyarrow.lock
```

See the Slack discussion here:
https://pantsbuild.slack.com/archives/C046T6T9U/p1760098582461759

## Reproduction

* `BUILD`
```
python_requirement(
    name="awswrangler",
    requirements=["awswrangler==3.12.1"],
    resolve="awswrangler",
)
```
* Run `pants generate-lockfiles --resolve=awswrangler` on macOS with an
`arm64` CPU
```
pip: ERROR: Cannot install awswrangler==3.12.1 because these package versions have conflicting dependencies.
pip: ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
pip:  
pip:  The conflict is caused by:
pip:      awswrangler 3.12.1 depends on pyarrow<18.0.0 and >=8.0.0; sys_platform == "darwin" and platform_machine == "x86_64"
pip:      awswrangler 3.12.1 depends on pyarrow<21.0.0 and >=18.0.0; sys_platform != "darwin" or platform_machine != "x86_64"
pip:  
pip:  Additionally, some packages in these conflicts have no matching distributions available for your environment:
pip:      pyarrow
pip:  
pip:  To fix this you could try to:
pip:  1. loosen the range of package versions you've specified
pip:  2. remove package versions to allow pip to attempt to solve the dependency conflict
```

## Implementation
... (continued)

Run Details

77 of 100 new or added lines in 6 files covered. (77.0%)

868 existing lines in 42 files now uncovered.

74471 of 94474 relevant lines covered (78.83%)

3.18 hits per line

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0.0

/src/python/pants/backend/codegen/python_format_string/target_types.py

1	# Copyright 2025 Pants project contributors (see CONTRIBUTORS.md).
2	# Licensed under the Apache License, Version 2.0 (see LICENSE).
UNCOV 3	import logging	×
4
UNCOV 5	from pants.core.goals.package import OutputPathField	×
UNCOV 6	from pants.engine.target import (	×
7	COMMON_TARGET_FIELDS,
8	DictStringToStringField,
9	MultipleSourcesField,
10	SingleSourceField,
11	Target,
12	TargetFilesGenerator,
13	)
14
UNCOV 15	logger = logging.getLogger(__name__)	×
16
17
UNCOV 18	class PythonFormatStringSourceField(SingleSourceField):	×
UNCOV 19	pass	×
20
21
UNCOV 22	class PythonFormatStringValuesField(DictStringToStringField):	×
UNCOV 23	alias = "values"	×
UNCOV 24	required = True	×
UNCOV 25	help = "Dictionary of key/value pairs to substitute."	×
26
27
UNCOV 28	class PythonFormatStringOutputPathField(OutputPathField):	×
UNCOV 29	def value_or_default(self, *, file_ending: str \| None) -> str:	×
30	if self.address.is_generated_target:	×
31	if self.address.is_parametrized:	×
32	return f"{self.address.filename}.{file_ending}{self.address.parameters_repr}"	×
33	return f"{self.address.filename}.{file_ending}"	×
34	return super().value_or_default(file_ending=file_ending)	×
35
36
UNCOV 37	class PythonFormatStringTarget(Target):	×
UNCOV 38	alias = "python_format_string"	×
UNCOV 39	help = "Substitutes values into a file. See k8s backend documentation for details."	×
UNCOV 40	core_fields = (	×
41	*COMMON_TARGET_FIELDS,
42	PythonFormatStringSourceField,
43	PythonFormatStringValuesField,
44	PythonFormatStringOutputPathField,
45	)
46
47
UNCOV 48	class PythonFormatStringsSourcesField(MultipleSourcesField):	×
UNCOV 49	help = "See k8s backend documentatiom."	×
50
51
UNCOV 52	class PythonFormatStringTargetGenerator(TargetFilesGenerator):	×
UNCOV 53	alias = "python_format_strings"	×
UNCOV 54	generated_target_cls = PythonFormatStringTarget	×
UNCOV 55	help = "Substitutes values into files. See k8s backend documentation for details."	×
UNCOV 56	core_fields = (	×
57	*COMMON_TARGET_FIELDS,
58	PythonFormatStringsSourcesField,
59	)
UNCOV 60	copied_fields = COMMON_TARGET_FIELDS	×
UNCOV 61	moved_fields = (PythonFormatStringValuesField,)	×
62
63
UNCOV 64	def target_types():	×
65	return (	×
66	PythonFormatStringTarget,
67	PythonFormatStringTargetGenerator,
68	)

pantsbuild / pants / 20147226056

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