Fix pre-commit GitHub Action cache

[agners]

Proposed change

Currently pre-commit caching seems not to work properly: There is no cache stored according to GitHub Action tab, and the Prepare Python dependencies job shows the following warning: Warning: Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.

This seems to be similar to what have been observed and solved in Home Assistant Core with home-assistant/core#46696. Use PRE_COMMIT_CACHE instead of PRE_COMMIT_HOME as well.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to the supervisor)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:
• Link to cli pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast supervisor tests)
• Tests have been added to verify that the new code works.

If API endpoints of add-on configuration are added/changed:

• Documentation added/updated for developers.home-assistant.io

[agners]

The difference is just a couple of seconds 🙈

Before:

(https://github.com/home-assistant/supervisor/actions/runs/7112818833)

After:

(https://github.com/home-assistant/supervisor/actions/runs/7113102530)

But the error is gone 🎉

[agners]

I also understand the reason now why this did not work: The environment variable really got the string assigned (as in PRE_COMMIT_HOME="~/.cache/pre-commit"). It seems that pre-commit uses PRE_COMMIT_HOME, but doesn't expand this path hence the cache landed in the current directory in a directory named ~ 🙈 . The GitHub Action cache path does expand this path, so tries to cache the right location.

Using a different variable name makes pre-commit use the default path, and GitHub Action storing that default path properly.