[ARROW-12826] [R] [CI] Add caching to revdepchecks

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Component/s: Continuous Integration, R
• External issue URL: https://github.com/apache/arrow/issues/28561
• Assignee: Unassigned
• Reporter: Jonathan Keane
• Created: 18/May/21 20:05
• Updated: 11/Jan/23 08:29
• Resolved: 25/Oct/22 12:40

Description

With ARROW-12569 we added a (manual) reverse dependency check job. This runs fine (if slow) for a one-off run. It should be possible to cache between runs. There are a few issues with this currently:

• {revdepcheck}

  does not (yet) support only running new runs

• The cache doesn't cache some of the longest running tasks (installing the reverse dependencies)
• If we cache the revdeps directory, we will need to re-add packages that should be re-checked.

We should investigate contributing to revdepcheck to resolve the run-only-new and possibly also add features for cacheing the installations (and only change when the crancache is invalidated / finds a new package?) https://github.com/HenrikBengtsson/revdepcheck.extras might also be helpful

For posterity, the following is ~what we would need to add to dev/tasks/r/github.linux.revdepcheck.yml
```

• name: Cache crancache and revdeps directory
  uses: actions/cache@v2
  with:
  key: {{ "r-revdep-cache-${{ some-way-to-get-arrow-version }}" }}
  path: |
  arrow/r/revdep
  arrow/.crancache
  ```