actions
windows-latest cache is not compatible with windows-11-arm
Using actions/cache/save@v4 in jobs under windows-11-arm, even when using enableCrossOsArchive: true, results in "Cache not found for input keys" when trying to restore the cache key in other OS using actions/cache/restore@v4, and vice-versa.
This minimal project's pull request illustrates the problem: https://github.com/pedrolcl/cachetest/actions/runs/15818554368/job/44582204888?pr=1 The result is that two caches are produced with the same key: https://github.com/pedrolcl/cachetest/actions/caches?query=key%3Asoundfont.dls
The problem seems to be that in the windows-11-arm image zstd is omitted, so the gzip method is used instead. Every other image, like Windows-2022, has zstd and it is the preferred method. Funny thing is that the gzip cache version is smaller than the zstd one in this case.
Is there any known workaround for this? If not, maybe we could request another input for "preferred compression method"?
Your analysis is exactly right and I once again am bit by this problem too.
That the "version" is lower is irrelevant, it is just a hash value calculated over the cache paths, the compression method and the setting for enableCrossOsArchive.
Years ago I already requested the configurable compression method you suggested in #389, unfortunately it was denied in favor of enableCrossOsArchive.
Unfortunately, as you already found out, this does not work for this scenario. :-(
Let's hope that they either finally add the possibility to select the compression method explicitly, or at least fix the enableCrossOsArchive flag for the current situation.
Only work-around I'm aware of is to not use the cache, but publish what you want to restore as artifact and then download the artifact. Drawback is, that you cannot delete artifacts once they were published, or at least it was not possible back then.
As I just found in https://github.com/actions/partner-runner-images/issues/99, you can add a run-step with choco install zstandard to add zstd.
With that I was able to restore the cache that was saved on the windows-latest runner. :-)
Big thanks to @Vampire : the workaround worked perfectly !!!
Simply adding this step before a cache operation:
- name: 'Workaround for missing zstd in windows-11-arm'
if: matrix.os == 'windows-11-arm'
run: choco install zstandard