Pre-commit fails if R is not installed

[WillAyd]

Describe the bug, including details regarding any error messages, version, and platform.

I believe #46581 introduced a bug where if a developer does not have R installed on their system, the pre-commit check will fail with an exception like:

[INFO] Installing environment for local.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
An unexpected error has occurred: CalledProcessError: command: ('Rscript', '--vanilla', '/tmp/tmp6h7jqkbh/script.R')
return code: 1
stdout:
    Executable `Rscript` not found

Component(s)

Developer Tools

[WillAyd]

I believe there are some R pre-commit hooks at https://github.com/lorenzwalthert/precommit - can these be used instead of a local hook?

[kou]

It's an expected behavior.
If you don't want to require R, could you use pre-commit run --show-diff-on-failure --color=always --all-files cpp or something? (The last cpp is the important part. See also #46602.)

I believe there are some R pre-commit hooks at https://github.com/lorenzwalthert/precommit - can these be used instead of a local hook?

It also uses local R. (We can't use it because it doesn't install cyclocomp. See also the PR description in #46581.)