Enable cross-platform pip wheel selection for aarch64 cross-compilation#620
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Add experimental_index_url and experimental_target_platforms to pip.parse so that rules_python selects the correct architecture wheel (e.g. aarch64) based on the Bazel target platform, instead of always resolving to the host (x86_64) wheel. Without this, cross-compiling a Python binary that depends on numpy would produce a runfiles tree containing x86_64 .so files regardless of the --platforms flag.
mvukov
approved these changes
May 29, 2026
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Add experimental_index_url and experimental_target_platforms to pip.parse so that rules_python selects the correct architecture wheel (e.g. aarch64) based on the Bazel target platform, instead of always resolving to the host (x86_64) wheel.
Without this, cross-compiling a Python binary that depends on numpy would produce a runfiles tree containing x86_64 .so files regardless of the --platforms flag.
This is an alternative to #619