Push images to GHCR with attestations (#1353)

.github/workflows/docker.yml

@@ -2,36 +2,72 @@ name: Docker
 
 on:
   workflow_dispatch:
+  schedule:
+    - cron: "39 12 * * *"
   push:
-    branches:
-      - main
-    paths:
-      - "qlty-*/**"
-      - "Cargo.*"
-      - ".github/workflows/docker.yml"
+    branches: ["main"]
+    tags: ["v*.*.*"]
   pull_request:
+    branches: ["main"]
     paths:
       - "qlty-*/**"
       - "Cargo.*"
       - ".github/workflows/docker.yml"
 
-permissions:
-  contents: read
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  docker:
+  build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write # For signatures
+
     steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/[email protected]
+
+      # - name: Set up QEMU
+      #   uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Docker Build
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        id: build-and-push
         uses: docker/build-push-action@v6
         with:
-          tags: qltysh/qlty:latest
-          push: false
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Sign the published Docker image
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          TAGS: ${{ steps.meta.outputs.tags }}
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}