add local cache

action.yaml

@@ -31,18 +31,36 @@ inputs:
   build_args:
     description: 'Optional build arguments separated by spaces or newlines (e.g., KEY=VAL)'
     required: false
-    default: ''    
+    default: ''
+  multi_stage_caching:
+    description: 'Enforce cache elision feature flags at the binary execution layer'
+    required: false
+    default: 'true'
 
 runs:
   using: 'composite'
   steps:
 
+    - name: Cache Kaniko Layers Locally
+      uses: actions/cache@v4
+      with:
+        path: ${{ forgejo.workspace }}/.kaniko-local-cache
+        key: kaniko-cache-${{ hashFiles('**/composer.lock', '**/Dockerfile') }}
+        restore-keys: |
+          kaniko-cache-  
+
     - name: Build and Push with Kaniko
       shell: sh
       env:
         INPUT_BUILD_ARGS: ${{ inputs.build_args }}
       run: |
 
+        # 0. Enforce cache elision feature flags at the binary execution layer
+        export FF_KANIKO_SKIP_CACHED_STAGES=true
+        export FF_KANIKO_INFER_CROSS_STAGE_CACHE_KEY=true
+        export FF_KANIKO_CACHE_LOOKAHEAD=true
+        export FF_KANIKO_ROLLING_CACHE_KEY=true
+
         # 1. Initialize Kaniko Docker config directory
         mkdir -p /kaniko/.docker
         
@@ -78,4 +96,5 @@ runs:
           --cache=true \
           --use-new-run=true \
           --snapshot-mode=redo \
+          --cache-dir="${{ forgejo.workspace }}/.kaniko-local-cache"
           --cache-repo="$CACHE_REPO_ARG"