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Fix ~/.cache ownership after the store restore - #4
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cache-nix-action restores as root, because /nix needs it, and extracts absolute paths. The archive therefore creates ~/.cache owned by root, and the action only restores write permission to ~/.cache/nix, not to its parent. Any tool that creates a directory under ~/.cache then fails. Zig does, with `unable to open global cache directory "/home/runner/.cache/zig": AccessDenied`, which broke wormhole's test jobs. Chown the directory after the restore, and assert writability in CI.
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cache-nix-actionrestores as root, because/nixneeds it, and extracts absolute paths. The archive therefore creates~/.cacheowned by root, and the action only restores write permission to~/.cache/nix, not to its parent.Any tool that creates a directory under
~/.cachethen fails. Zig does:unable to open global cache directory "/home/runner/.cache/zig": AccessDenied, which broke wormhole's test jobs on the first run that adopted the action.Chowns
~/.cacheafter the restore and asserts writability in CI.