chore(py_executable): print warning if build zip is enabled

[rickeylev]

This prints a warning if --build_python_zip is enabled.

Work towards #3567 #2586

[gemini-code-assist]

Summary of Changes

Hello @rickeylev, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request implements a deprecation warning for the --build_python_zip flag within the py_executable rule. The change aims to inform users about the upcoming removal of this flag and guide them towards using the recommended py_zipapp_binary or py_zipapp_test rules instead, ensuring a smoother transition for projects relying on Python zip applications.

Highlights

• Deprecation Warning: Introduced a warning message that is printed when the --build_python_zip flag is enabled. This flag is now deprecated and will be removed in a future release.
• Migration Guidance: The warning advises users to switch to py_zipapp_binary or py_zipapp_test as alternatives to the deprecated --build_python_zip flag.
• Issue Reference: The warning message includes a reference to GitHub issue Deprecate and remove implicit py_binary zipapp support #3567 for more context on the deprecation.

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Changelog

• python/private/py_executable.bzl
  • Added a print statement within the _create_executable function to output a deprecation warning when build_zip_enabled is true.

Activity

• No human activity has been recorded on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request introduces a helpful warning for the deprecated --build_python_zip flag, guiding users toward modern alternatives. The implementation is correct, and I've provided one minor suggestion to improve the code's style and readability.