Add more debug output: key-file, path input, and expanded path on restore

action.yaml

@@ -1,5 +1,5 @@
-name: 'Cache Save'
-description: 'Save cache as tar.xz archive on the runner filesystem'
+name: 'Cache Restore'
+description: 'Restore cache from tar.xz archive on the runner filesystem'
 inputs:
   path:
     description: 'Directory to cache'
@@ -11,10 +11,15 @@ inputs:
   key-file:
     description: 'File to hash for the cache key'
     required: true
+outputs:
+  cache-hit:
+    description: 'true if exact key match found, false otherwise'
+    value: ${{ steps.restore.outputs.cache-hit }}
 runs:
   using: "composite"
   steps:
-    - name: Save cache
+    - name: Restore cache
+      id: restore
       shell: bash
       run: |
         CACHE_DIR="$HOME/.cache/.cache-store"
@@ -29,13 +34,15 @@ runs:
         echo "Key file: ${{ inputs.key-file }}"
         echo "Path input: ${{ inputs.path }}"
         echo "Expanded path: ${EXPANDED_PATH}"
+        echo "Cache key: ${CACHE_KEY}"
         echo "Archive path: ${ARCHIVE}"
 
-        if [ ! -d "$EXPANDED_PATH" ] || [ -z "$(ls -A "$EXPANDED_PATH" 2>/dev/null)" ]; then
-          echo "Cache directory empty, skipping save"
-          exit 0
+        if [ -f "$ARCHIVE" ]; then
+          echo "Cache hit: ${CACHE_KEY}"
+          mkdir -p "$EXPANDED_PATH"
+          tar -xf "$ARCHIVE" -C "/" 2>/dev/null || true
+          echo "cache-hit=true" >> $GITHUB_OUTPUT
+        else
+          echo "Cache miss: ${CACHE_KEY}"
+          echo "cache-hit=false" >> $GITHUB_OUTPUT
         fi
-
-        echo "Saving cache: ${CACHE_KEY}"
-        REL_PATH="$(echo "$EXPANDED_PATH" | sed 's|^/||')"
-        tar -cJf "$ARCHIVE" -C "/" "$REL_PATH" 2>/dev/null && echo "Cache saved" || echo "Cache save failed"