.github/workflows/docker.yml: use metadata action, run on PRs

.github/workflows/docker.yml

@@ -3,6 +3,10 @@
 name: Docker Build and Deploy
 
 on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - master
   push:
     # Publish `master` as Docker `dev` image.
     branches:
@@ -11,29 +15,43 @@ on:
     tags:
       - v*
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   docker:
     name: Build and push docker images
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     permissions:
       packages: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.ref }}
+        uses: classabbyamp/treeless-checkout-action@v1
 
       - name: Write ref to file
+        if: ${{ github.event_name != 'pull_request' }}
         run: git rev-list -n 1 $GITHUB_REF > ./git_commit
 
-      - name: Build image
-        id: build_image
-        run: |
-          IMAGE_ID=${GITHUB_REPOSITORY,,}
-          IMAGE_NAME=${IMAGE_ID#*/}
-          echo "image_id=$IMAGE_ID" >> $GITHUB_ENV
-          echo "image_name=$IMAGE_NAME" >> $GITHUB_ENV
-          docker build . --file Dockerfile -t $IMAGE_NAME
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=sha,prefix=
+            type=raw,value=dev,enable={{is_default_branch}}
+            type=raw,event=tag,value=latest,enable={{is_default_branch}}
+            type=ref,event=tag,prefix=,enable={{is_default_branch}},priority=1000
+          flavor: latest=false
+          labels: |
+            org.opencontainers.image.authors=classabbyamp and 0x5c
+            org.opencontainers.image.url=https://github.com/miaowware/qrm2
+            org.opencontainers.image.source=https://github.com/${{ github.repository }}
+            org.opencontainers.image.vendor=miaowware
+            org.opencontainers.image.title=qrm2
+            org.opencontainers.image.description=Discord bot with ham radio functions
 
       - name: Login to Github Container Registry
         uses: docker/login-action@v1
@@ -42,41 +60,10 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Tag image
-        id: tag_image
-        run: |
-          IMAGE_NAME=${{ env.image_name }}
-          IMAGE_ID=ghcr.io/${{ env.image_id }}
-          echo IMAGE_ID=$IMAGE_ID
-          echo "image_id=$IMAGE_ID" >> $GITHUB_ENV
-
-          # Strip git ref prefix from version
-          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
-          # Strip "v" prefix from tag name
-          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
-          # if version is master, set version to dev
-          [[ "$VERSION" == "master" ]] && VERSION=dev
-          echo VERSION=$VERSION
-          echo "version=$VERSION" >> $GITHUB_ENV
-
-          # tag dev or x.x.x
-          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
-          # tag latest if not a dev release
-          [[ "$VERSION" != "dev" ]] && docker tag $IMAGE_NAME $IMAGE_ID:latest || true
-
-      - name: Push images to registry
-        run: |
-          VERSION=${{ env.version }}
-          IMAGE_ID=${{ env.image_id }}
-
-          [[ "$VERSION" != "dev" ]] && docker push $IMAGE_ID:latest || true
-          docker push $IMAGE_ID:$VERSION
-
-      - name: Deploy official images
-        id: deploy_images
-        uses: satak/webrequest-action@v1
+      - name: Build and push
+        uses: docker/build-push-action@v5
         with:
-          url: ${{ secrets.DEPLOY_URL }}
-          method: POST
-          headers: '{"Authentication": "Token ${{ secrets.DEPLOY_TOKEN }}"}'
-          payload: '{"version": "${{ env.version }}"}'
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}