This is the second attempt to fix our Git history. This should allow
"git blame" to work correctly in the upb/ directory even though our
automation unexpectedly blew away that directory.
This pulls in updates to system_python, which allows for better handling of our non-hermetic setup. Specifically, our python tests are marked incompatible on systems without a python installation. This will cause them to get skipped by wildcard expansions (which is why we add 1 explicit target to the kokoro builds).
PiperOrigin-RevId: 492286518
The current behavior will crash any Bazel command immediately, due to our declared pip dependencies in WORKSPACE, if python3 can't be found. The new behavior will mock out these workspace dependencies and allow any non-python targets to run. Python targets will be skipped by wildcard expressions if there's no system python3, and will fail when run directly, due to compatibility mismatch.
PiperOrigin-RevId: 492085254
Adam Cozzette
Protobuf Team Bot
Deanna Garcia
Mike Kruskal
zhangskz