build: Testing infra images for infra-* branches

.github/workflows/build-infra-dockers.yaml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - infrastructure
+      - infra-*
 
 env:
   GO_VERSION: "~1.21.5"
@@ -14,6 +15,7 @@ env:
 jobs:
   docker-syncthing:
     name: Build and push Docker images
+    if: github.repository == 'syncthing/syncthing'
     runs-on: ubuntu-latest
     environment: docker
     strategy:
@@ -49,13 +51,24 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Set Docker tags (all branches)
+        run: |
+          tags=syncthing/${{ matrix.pkg }}:${{ github.sha }}
+          echo "TAGS=$tags" >> $GITHUB_ENV
+
+      - name: Set Docker tags (latest)
+        if: github.ref == 'refs/heads/infrastructure'
+        run: |
+          tags=syncthing/${{ matrix.pkg }}:latest,${{ env.TAGS }}
+          echo "TAGS=$tags" >> $GITHUB_ENV
+
       - name: Build and push
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile.${{ matrix.pkg }}
           platforms: linux/amd64,linux/arm64
           push: true
-          tags: syncthing/${{ matrix.pkg }}:latest,syncthing/${{ matrix.pkg }}:${{ github.sha }}
+          tags: ${{ env.TAGS }}
           labels: |
             org.opencontainers.image.revision=${{ github.sha }}