saru
d4b6457b06
The previous restores predate the detection line, which is why this only started failing on 2026-08-17. Suppress the pipeline status with '|| true' — FIRST_ENTRY still captures the first archive entry, and a genuinely unreadable archive degrades to the legacy fallback / cache-hit=false path as before.
75 lines
2.9 KiB
YAML
75 lines
2.9 KiB
YAML
name: 'Cache Restore'
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description: 'Restore cache from tar.xz archive on the runner filesystem'
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inputs:
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path:
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description: 'Directory to cache'
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required: false
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default: ${{ github.workspace }}
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key-prefix:
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description: 'Prefix for the cache key'
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required: true
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key-file:
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description: 'File to hash for the cache key'
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required: true
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outputs:
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cache-hit:
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description: 'true if exact key match found, false otherwise'
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value: ${{ steps.restore.outputs.cache-hit }}
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runs:
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using: "composite"
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steps:
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- name: Restore cache
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id: restore
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shell: bash
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run: |
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CACHE_DIR="$HOME/.cache/.cache-store"
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mkdir -p "$CACHE_DIR"
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KEY_HASH=$(sha256sum "${{ inputs.key-file }}" | awk '{print $1}')
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CACHE_KEY="${{ inputs.key-prefix }}-${KEY_HASH}"
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ARCHIVE="${CACHE_DIR}/${CACHE_KEY}.tar.xz"
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EXPANDED_PATH=$(eval echo "${{ inputs.path }}")
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echo "Key file: ${{ inputs.key-file }}"
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echo "Path input: ${{ inputs.path }}"
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echo "Expanded path: ${EXPANDED_PATH}"
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echo "Cache key: ${CACHE_KEY}"
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echo "Archive path: ${ARCHIVE}"
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if [ -f "$ARCHIVE" ]; then
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echo "Cache hit: ${CACHE_KEY}"
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mkdir -p "$EXPANDED_PATH"
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# New-format archives hold entries relative to the cached directory
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# (<basename>/...), so extract into the parent of the requested
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# path. Legacy archives embed the absolute path of the run that
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# saved them; fall back to extracting them to "/" (status quo,
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# they are TTL-pruned within the retention window anyway).
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# NOTE: `|| true` is mandatory — act runs step scripts with
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# `bash -e -o pipefail`, and `head -1` closes the pipe after the
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# first line, so tar dies with SIGPIPE (141) and pipefail turns
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# that into a step failure (restore only ever "worked" before
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# this detection line existed).
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FIRST_ENTRY=$(tar -tf "$ARCHIVE" 2>/dev/null | head -1 || true)
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if [ "${FIRST_ENTRY%%/*}" = "$(basename "$EXPANDED_PATH")" ]; then
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echo "Restoring to: $(dirname "$EXPANDED_PATH")"
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tar -xf "$ARCHIVE" -C "$(dirname "$EXPANDED_PATH")" 2>/dev/null
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else
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tar -xf "$ARCHIVE" -C "/" 2>/dev/null
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fi
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if [ -d "$EXPANDED_PATH" ] && [ -n "$(ls -A "$EXPANDED_PATH" 2>/dev/null)" ]; then
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# record last use so the retention policy can expire by access time
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touch "$ARCHIVE"
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echo "cache-hit=true" >> $GITHUB_OUTPUT
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else
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echo "Cache restore failed"
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echo "cache-hit=false" >> $GITHUB_OUTPUT
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fi
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else
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echo "Cache miss: ${CACHE_KEY}"
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echo "cache-hit=false" >> $GITHUB_OUTPUT
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fi
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# Trim the shared cache store and stale workspaces (best-effort)
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bash "${{ github.action_path }}/prune.sh" || true
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