Use Docker meta GH action

Signed-off-by: Stefan Prodan <[email protected]>

Author: stefanprodan

.github/workflows/release.yaml

@@ -29,45 +29,38 @@ jobs:
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-go-
+      - uses: docker/setup-qemu-action@v1
+      - uses: docker/setup-buildx-action@v1
       - uses: sigstore/cosign-installer@main
       - uses: anchore/sbom-action/download-syft@v0
-      - uses: docker/login-action@v1
+      - name: Docker login
+        uses: docker/login-action@v1
         with:
           registry: ghcr.io
           username: fluxcdbot
           password: ${{ secrets.GHCR_TOKEN }}
-      - name: Prepare
-        id: prep
-        run: |
-          VERSION="${{ github.event.inputs.tag }}-${GITHUB_SHA::8}"
-          if [[ $GITHUB_REF == refs/tags/* ]]; then
-            VERSION=${GITHUB_REF/refs\/tags\//}
-          fi
-          echo ::set-output name=BUILD_DATE::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
-          echo ::set-output name=VERSION::${VERSION}
-      - name: Publish multi-arch container image
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ghcr.io/fluxcd/${{ env.CONTROLLER }}
+          tags: |
+            type=raw,value={{tag}}
+      - name: Docker push
         uses: docker/build-push-action@v2
         with:
           push: true
           builder: ${{ steps.buildx.outputs.name }}
           context: .
           file: ./Dockerfile
           platforms: linux/amd64,linux/arm/v7,linux/arm64
-          tags: |
-            ghcr.io/fluxcd/${{ env.CONTROLLER }}:${{ steps.prep.outputs.VERSION }}
-          labels: |
-            org.opencontainers.image.title=${{ github.event.repository.name }}
-            org.opencontainers.image.description=${{ github.event.repository.description }}
-            org.opencontainers.image.url=${{ github.event.repository.html_url }}
-            org.opencontainers.image.source=${{ github.event.repository.html_url }}
-            org.opencontainers.image.revision=${{ github.sha }}
-            org.opencontainers.image.version=${{ steps.prep.outputs.VERSION }}
-            org.opencontainers.image.created=${{ steps.prep.outputs.BUILD_DATE }}
-      - name: Sign multi-arch container image
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+      - name: Docker sign
         env:
           COSIGN_EXPERIMENTAL: 1
         run: |
-          cosign sign ghcr.io/fluxcd/${{ env.CONTROLLER }}:${{ steps.prep.outputs.VERSION }}
+          cosign sign ${{ steps.meta.outputs.tags }}
       - uses: goreleaser/goreleaser-action@v2
         with:
           version: latest