Switch to Github container registry.

.github/workflows/dicebot-ci.yml

@@ -26,38 +26,43 @@ jobs:
     - name: Run tests
       run: cargo test --verbose
 
-  docker_push_latest:
+  # Push image to GitHub Packages.
+  # See also https://docs.docker.com/docker-hub/builds/
+  push:
+    # Ensure test job passes before pushing image.
     needs: build_and_test
 
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    if: github.event_name == 'push'
 
     steps:
-      - name: Checkout code
+      - uses: actions/checkout@v2
-        uses: actions/checkout@v2
 
-      - name: Build and push Docker images
+      - name: Build image
-        uses: docker/build-push-action@v1
+        run: docker build . --file Dockerfile --tag $IMAGE_NAME
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-          repository: projectmoon/chronicle-dicebot
-          tags: latest
 
-  docker_push_tag:
+      - name: Log into GitHub Container Registry
-    needs: build_and_test
+      # TODO: Create a PAT with `read:packages` and `write:packages` scopes and save it as an Actions secret `CR_PAT`
+        run: echo "${{ secrets.CR_PAT }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin
 
-    runs-on: ubuntu-latest
+      - name: Push image to GitHub Container Registry
-    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
+        run: |
+          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
 
-    steps:
+          # Change all uppercase to lowercase
-      - name: Checkout code
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
-        uses: actions/checkout@v2
 
-      - name: Build and push Docker images
+          # Strip git ref prefix from version
-        uses: docker/build-push-action@v1
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
-        with:
+
-          username: ${{ secrets.DOCKER_USERNAME }}
+          # Strip "v" prefix from tag name
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
-          repository: projectmoon/chronicle-dicebot
+
-          tag_with_ref: true
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "master" ] && VERSION=latest
+
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION