Make Cache Key Optional?

Is it possible to make the key optional and hence make the cache action read-only? This is in the case that you know that you only want to read from one of the “restore” keys and to fail if you can’t find one.

For clarity, look for restore key patterns only:

On cache hit - read the cache, don’t attempt to write a new one. On cache miss - job fail.

An alternative could be to recognize a specific string as the key which means skip the write on job completion:

      uses: actions/cache@v1
      with:
        path: cache
        key: donotwrite
        restore-keys: myexpectedcache-

[luigi311]

This would be nice. I have a use case where on job 1 I download a file off a server and then create a cache of said file with the key file-${{ hashFile(file) }}, on job 2 I need to do a restore on that exact key but the file does not exist in job 2 and I don’t want to download the file every single time so I want to call a cache restore with the restore key of file- so it does a partial match and restores the lastest key. The problem with the current implementation is I need to generate a bogus unique key for every single run so I don’t get a cache hit and restore a version that might not be valid but then I’m storing the same file over and over with different bogus keys.

[github-actions[bot]]

This issue was closed because it has been inactive for 5 days since being marked as stale.