Unable to restore cache

I’m trying to cache/restore vcpkg artifacts with vcpkg installed to a path under the C:\ drive.

The reason I’m not using the default workspace directory (under D:\) is because there is not enough free space available for the installation of all packages, even if installing one package at a time and clearing buildtrees between installations, instead of installing everything at once by using the response file directly.

While there is enough free space on the C:\ drive to install all packages successfully and complete the jobs, I can’t get the cache to restore correctly in subsequent jobs that attempt to use it. The problem is reproducible.

The cache restoration fails with the following errors:

C:/qbt_tools/vcpkg/: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg'
C:/qbt_tools/vcpkg/.artifactignore: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\.artifactignore'
C:/qbt_tools/vcpkg/.git/: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\.git'
C:/qbt_tools/vcpkg/.gitattributes: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\.gitattributes'
C:/qbt_tools/vcpkg/.github/: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\.github'
C:/qbt_tools/vcpkg/.gitignore: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\.gitignore'
C:/qbt_tools/vcpkg/.vcpkg-root: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\.vcpkg-root'
C:/qbt_tools/vcpkg/bootstrap-vcpkg.bat: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\bootstrap-vcpkg.bat'
C:/qbt_tools/vcpkg/bootstrap-vcpkg.sh: Can't create '\\\\?\\C:\\qbt_tools\\vcpkg\\bootstrap-vcpkg.sh'
...
... (same for all other vcpkg files)
...
tar.exe: Error exit delayed from previous errors.
restoreCache() failed: 'Error: Tar failed with error: The process 'C:\windows\System32\tar.exe' failed with exit code 1'.
Cache miss.

Example of run that cached the artifacts successfully: https://github.com/FranciscoPombal/qBittorrent/actions/runs/146840965 Example of run that failed to restore them: https://github.com/FranciscoPombal/qBittorrent/runs/806709981

Is this happening because it’s not possible to restore cache to the C:\ drive? Is this a limitation of the underlying cache action? Any help appreciated.

[lukka]

@FranciscoPombal cool, thanks for reporting. Looks sensible to me that run-vcpkg action ensures the cached paths are existing at least, this issue could be just tracking this work to be done on run-vcpkg.

[FranciscoPombal]

@lukka

This should probably be another issue (possibly even for the upstream cache action), but it seems I’m sporadically getting this error when attempting to restore the cache:

Running restore-cache
##[warning]restoreCache() failed: 'Error [ERR_STREAM_PREMATURE_CLOSE]: Premature close'.
Cache miss.

Most recently happened in this run (third matrix leg/variant): https://github.com/FranciscoPombal/qBittorrent/runs/809641734