Cirrus-ci-docs: Cache instruction chokes up when cache contains broken symlinks

[dotdoom]

Expected Behavior

Broken symlinks are cached (as symlinks) regardless of where they point to: file outside the cache_folder, file within cache_folder or nonexistent file.

Real Behavior

"Upload cache" reports failure and does not store cache (next build reports "Cache miss").

Failed to calculate hash of /var/folders/sy/2x5qvs0n4lg18fry9jz4y21m0000gn/T/cirrus-ci-build/SDK! open /var/folders/sy/2x5qvs0n4lg18fry9jz4y21m0000gn/T/cirrus-ci-build/SDK/symlink: no such file or directorySkipping uploading of /var/folders/sy/2x5qvs0n4lg18fry9jz4y21m0000gn/T/cirrus-ci-build/SDK!

Related Info

• https://github.com/dotdoom/onfailure

• https://cirrus-ci.com/task/5684879681912832

  • OS: (DockerLinux, macOS)
  • Task name: symlinks
  • Script/cache name (if applies): main

[RDIL]

Can reproduce
@fkorotkov we had a private conversation about this earlier this year

[dotdoom]

Real world case:

This Flutter directory is full of non-existent symlinks until iOS tests for the Flutter framework itself run (which doesn't happen on derived project build / test run).

A portable workaround is to run:

$ find /directory/with/flutter -type l -exec test ! -e {} \; -print -delete

[fkorotkov]

Thank you for the example! I was able to reproduce it in a test and fixed it. Your example should be working now. Could you please try once again on your project now?

[dotdoom]

Great! It works perfectly now, the cache is being uploaded without error messages, and then downloads for the next build. Thank you!