Test GitHub Cache

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/ci.yml

@@ -142,3 +142,47 @@ jobs:
         name: Dump context
         if: always()
         uses: crazy-max/ghaction-dump-context@v1
+
+  github-cache:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.1
+      -
+        name: Set up QEMU
+        uses: ./setup-qemu/ # change to docker/setup-qemu-action@master
+        with:
+          platforms: all
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: ./setup-buildx/ # change to docker/setup-buildx-action@master
+      -
+        name: Build 1
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile-multi-golang
+          builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/amd64,linux/arm64,linux/386
+          cache-github: true
+          tags: |
+            localhost:5000/name/app:latest
+            localhost:5000/name/app:1.0.0
+      -
+        name: Build 2
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile-multi-golang
+          builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/amd64,linux/arm64,linux/386
+          cache-github: true
+          tags: |
+            localhost:5000/name/app:latest
+            localhost:5000/name/app:1.0.0
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1

action.yml

@@ -60,6 +60,10 @@ inputs:
   cache-to:
     description: "Newline-delimited list of cache export destinations for buildx (eg. user/app:cache, type=local,dest=path/to/dir)"
     required: false
+  cache-github:
+    description: "Export all the layers of all intermediate steps in the GitHub cache"
+    required: false
+    default: 'false'
   bake:
     description: "Use bake as the high-level build command"
     required: false