tree 7d8bb787e896f421d42f9e6d06da36fb1df88952
parent 80d472933a06bf050b471584164be4bf2dee57a3
author Protobuf Team Bot <protobuf-github-bot@google.com> 1787025662 -0700
committer Copybara-Service <copybara-worker@google.com> 1787025835 -0700

Migrate Protobuf Python C extensions to rules_python toolchain targets.

Update _message to use rules_python's py_extension macro (which
automatically injects required toolchain headers and manages shared library
extensions across platforms), and update _api_implementation.so to depend
directly on `@rules_python//python/cc:current_py_cc_headers` instead of
`@system_python`.

Using `py_extension` and `current_py_cc_headers` decouples Python C
extensions from the custom system_python.bzl script while maintaining
current host-interpreter behavior during the migration.

#test-continuous

PiperOrigin-RevId: 966345187