codesigningtool fails with rules_python 1.7.0 when using tree artifact outputs

[vincehodsdon]

Description

When using rules_python 1.7.0+ I am seeing the below import error when building:

ModuleNotFoundError: No module named 'tools.wrapper_common'

Environment

• rules_apple: 4.3.3
• rules_python: 1.7.0 (works with 1.6.3)
• apple_support: 2.0.0
• Bazel: 8.x
• rules_xcodeproj: 3.5.1

Root Cause

rules_python 1.7.0 changed how import paths are handled in PR bazel-contrib/rules_python#3242 - moving from PYTHONPATH environment variable to writing paths to a generated file.

When tree artifact outputs are enabled, bundletool_experimental.py invokes the codesigning tool via os.system():

rules_apple/tools/bundletool/bundletool_experimental.py

Line 306 in 9c9f156

exit_code = os.system(

I think the issue is here, where the python paths no longer are set in a way for importing tools.wrapper_common

Reproduction

1. Use rules_python 1.7.0+ with rules_apple 4.3.3
2. Build an iOS app with tree artifact outputs enabled (default in rules_xcodeproj)
3. The codesigning step fails with the import error

Workarounds

1. Downgrade rules_python to 1.6.3 - The import path handling works correctly in 1.6.3
2. Disable tree artifact outputs - Add --define=apple.experimental.tree_artifact_outputs=0 to .bazelrc