Add global state to raise an error when attempting to subprocess uv

[nathanjmcdougall]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a new disable_uv_subprocess flag to the global configuration to prevent uv subprocess calls, updates the subprocess helper to respect this flag and error early, and adds tests for both enabled and disabled behaviors.

• Introduce disable_uv_subprocess in UsethisConfig and its default.
• Guard call_uv_subprocess to raise UVSubprocessFailedError when the flag is set.
• Add tests verifying that subprocess calls are blocked or allowed based on the flag.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/usethis/test_config.py	Added TestDisableUVSubprocess tests for the new disable_uv_subprocess flag
src/usethis/_integrations/uv/call.py	Early exit in call_uv_subprocess when disable_uv_subprocess is true
src/usethis/_config.py	Added disable_uv_subprocess attribute and set up in the config setter

Comments suppressed due to low confidence (2)

src/usethis/_config.py:31

• The new disable_uv_subprocess attribute is not described in the class docstring. Please update the top-level docstring of UsethisConfig to explain what this flag controls.

    disable_uv_subprocess: bool = False

tests/usethis/test_config.py:54

• Consider mocking or monkeypatching the underlying call_subprocess function here so that the test doesn't invoke a real external command and can assert on the expected invocation.

                output = call_uv_subprocess(["python", "list"], change_toml=False)

[codspeed-hq]

CodSpeed Walltime Performance Report

Merging #763 will not alter performance

_{Comparing 761-global-state-to-avoid-subprocessing-uv (0cc113f) with main (ebdff2b)}

Summary

✅ 1 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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