Description
🐞 bug report
Affected Rule
The issue is caused by the rule: python_register_toolchains
Is this a regression?
No
Description
python_register_toolchains registers the toolchains with exec_compatible_with but should register the toolchains with target_compatible_with instead according to the design here: https://github.com/bazelbuild/rules_python/blob/main/proposals/2019-02-12-design-for-a-python-toolchain.md
The result is cross-platform builds end up with an exec platform platform interpreter in the runfiles tree instead of a target platform interpeter.
🔬 Minimal Reproduction
From a checkout of https://github.com/nvachhar/rules_python_bug:
🔥 Exception or Error
Building for macos-x86_64 on a macos-x86_64 host results in an x86_64 interpeter.
$ bazel build --platforms :macos-x86_64 hello
INFO: Build option --platforms has changed, discarding analysis cache.
INFO: Analyzed target //:hello (0 packages loaded, 3974 targets configured).
INFO: Found 1 target...
Target //:hello up-to-date:
bazel-bin/hello
INFO: Elapsed time: 0.352s, Critical Path: 0.03s
INFO: 1 process: 1 internal.
INFO: Build completed successfully, 1 total action
$ ls bazel-bin/hello.runfiles
MANIFEST* __init__.py* __main__/ python3_9_x86_64-apple-darwin/Building for macos-arm64 on a macos-x86_64 host still results in an x86_64 interpeter.
$ bazel build --platforms :macos-arm64 hello
INFO: Build option --platforms has changed, discarding analysis cache.
INFO: Analyzed target //:hello (0 packages loaded, 3974 targets configured).
INFO: Found 1 target...
Target //:hello up-to-date:
bazel-bin/hello
INFO: Elapsed time: 0.387s, Critical Path: 0.03s
INFO: 1 process: 1 internal.
INFO: Build completed successfully, 1 total action
$ ls bazel-bin/hello.runfiles
MANIFEST* __init__.py* __main__/ python3_9_x86_64-apple-darwin/🌍 Your Environment
Operating System:
macOS 12.3.1
Output of bazel version:
Bazelisk version: development
Build label: 5.0.0
Build target: bazel-out/darwin-opt/bin/src/main/java/com/google/devtools/build/lib/bazel/BazelServer_deploy.jar
Build time: Wed Jan 19 14:15:55 2022 (1642601755)
Build timestamp: 1642601755
Build timestamp as int: 1642601755
Rules_python version:
0.8.1