ci: change to reuse tag and image built on PR and avoid rebuilding on merge

.github/workflows/client-ci.yml

@@ -84,6 +84,7 @@ jobs:
           images: ghcr.io/${{ github.repository }}/app
           tags: |
             type=raw,value=candidate
+            type=raw,value=pr-${{ github.event.pull_request.number }}
 
       - name: Generate version tag
         id: version

.github/workflows/main-client.yml

@@ -31,6 +31,10 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Set lowercase repo name
+        id: repo
+        run: echo "name=${GITHUB_REPOSITORY,,}" >> $GITHUB_OUTPUT
+
       - name: Generate version tag
         id: version
         run: |
@@ -49,26 +53,26 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract metadata for Docker
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ghcr.io/${{ github.repository }}/app
-          tags: |
-            type=raw,value=${{ steps.version.outputs.tag }}
-            type=raw,value=latest,enable={{is_default_branch}}
+      - name: Find PR number
+        id: find_pr
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          PR_NUMBER=$(gh pr list --commit ${{ github.sha }} --state merged --json number --jq '.[0].number')
+          if [ -z "$PR_NUMBER" ]; then
+            echo "No merged PR found for this commit. Falling back to 'candidate' tag."
+            PR_NUMBER="candidate"
+          else
+            PR_NUMBER="pr-${PR_NUMBER}"
+          fi
+          echo "tag=${PR_NUMBER}" >> $GITHUB_OUTPUT
 
-      - name: Build and push Docker image
-        uses: docker/build-push-action@v5
-        with:
-          context: ./client
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          build-args: |
-            VITE_BUILD=v${{ steps.version.outputs.tag }}
+      - name: Promote Docker image
+        run: |
+          docker buildx imagetools create \
+            --tag ghcr.io/${{ steps.repo.outputs.name }}/app:latest \
+            --tag ghcr.io/${{ steps.repo.outputs.name }}/app:${{ steps.version.outputs.tag }} \
+            ghcr.io/${{ steps.repo.outputs.name }}/app:${{ steps.find_pr.outputs.tag }}
 
       - name: Create and push Git tag
         run: |

.github/workflows/main-server.yml

@@ -69,18 +69,29 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Build Docker image with Spring Boot
-        working-directory: ./server
-        run: |
-          ./mvnw -Pnative -DskipTests spring-boot:build-image \
-            -Dspring-boot.build-image.imageName=ghcr.io/${{ steps.repo.outputs.name }}/api:latest \
-            -Dspring-boot.build-image.builder=paketobuildpacks/builder-jammy-tiny:latest
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
-      - name: Tag and push Docker image
+      - name: Find PR number
+        id: find_pr
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          docker tag ghcr.io/${{ steps.repo.outputs.name }}/api:latest ghcr.io/${{ steps.repo.outputs.name }}/api:${{ steps.version.outputs.version }}
-          docker push ghcr.io/${{ steps.repo.outputs.name }}/api:latest
-          docker push ghcr.io/${{ steps.repo.outputs.name }}/api:${{ steps.version.outputs.version }}
+          PR_NUMBER=$(gh pr list --commit ${{ github.sha }} --state merged --json number --jq '.[0].number')
+          if [ -z "$PR_NUMBER" ]; then
+            echo "No merged PR found for this commit. Falling back to 'candidate' tag."
+            PR_NUMBER="candidate"
+          else
+            PR_NUMBER="pr-${PR_NUMBER}"
+          fi
+          echo "tag=${PR_NUMBER}" >> $GITHUB_OUTPUT
+
+      - name: Promote Docker image
+        run: |
+          docker buildx imagetools create \
+            --tag ghcr.io/${{ steps.repo.outputs.name }}/api:latest \
+            --tag ghcr.io/${{ steps.repo.outputs.name }}/api:${{ steps.version.outputs.version }} \
+            ghcr.io/${{ steps.repo.outputs.name }}/api:${{ steps.find_pr.outputs.tag }}
 
       - name: Create and push Git tag
         run: |

.github/workflows/server-ci.yml

@@ -91,10 +91,12 @@ jobs:
         working-directory: ./server
         run: |
           ./mvnw -Pnative -DskipTests spring-boot:build-image \
-            -Dspring-boot.build-image.imageName=ghcr.io/rmcampos/tasknote/api:latest \
+            -Dspring-boot.build-image.imageName=ghcr.io/${{ steps.repo.outputs.name }}/api:latest \
             -Dspring-boot.build-image.builder=paketobuildpacks/builder-jammy-tiny:latest
 
       - name: Tag and push Docker image
         run: |
           docker tag ghcr.io/${{ steps.repo.outputs.name }}/api:latest ghcr.io/${{ steps.repo.outputs.name }}/api:candidate
+          docker tag ghcr.io/${{ steps.repo.outputs.name }}/api:latest ghcr.io/${{ steps.repo.outputs.name }}/api:pr-${{ github.event.pull_request.number }}
           docker push ghcr.io/${{ steps.repo.outputs.name }}/api:candidate
+          docker push ghcr.io/${{ steps.repo.outputs.name }}/api:pr-${{ github.event.pull_request.number }}