fix(ci): simplify workflow to matrix strategy for Gitea compat

- Replace 4 separate build jobs with single matrix build job
- Eliminates complex dependency graph causing 'must contain one job
  without dependencies' parse error in Gitea act_runner
- All if: conditions now use single-line strings (no multi-line |)
- workflow_dispatch image filter moved to step-level check
- Add stale buildx builder cleanup step before each build
- Simplify release/notify to depend on single 'build' job

.gitea/workflows/build-push.yaml

@@ -88,19 +88,55 @@ jobs:
           echo "should_release=true" >> $GITHUB_OUTPUT
           echo "📦 Version: $LATEST → $NEW_VERSION ($BUMP bump)"
 
-  build-nvidia:
+  # Build all GPU worker images using a matrix strategy
+  # Runs sequentially on single runner, but one job definition = simpler dependency graph
+  build:
     needs: [determine-version]
-    # Skip if commit message contains [skip images] or [ray-serve only]
-    if: |
-      !contains(github.event.head_commit.message, '[skip images]') &&
-      !contains(github.event.head_commit.message, '[ray-serve only]') &&
-      (github.event_name != 'workflow_dispatch' || github.event.inputs.image == 'all' || github.event.inputs.image == 'nvidia')
+    if: "!contains(github.event.head_commit.message, '[skip images]') && !contains(github.event.head_commit.message, '[ray-serve only]')"
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: nvidia
+            dockerfile: Dockerfile.ray-worker-nvidia
+          - name: rdna2
+            dockerfile: Dockerfile.ray-worker-rdna2
+          - name: strixhalo
+            dockerfile: Dockerfile.ray-worker-strixhalo
+          - name: intel
+            dockerfile: Dockerfile.ray-worker-intel
     steps:
+      # For workflow_dispatch, allow building a single image
+      - name: Check if should build this variant
+        id: check
+        run: |
+          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
+            INPUT="${{ github.event.inputs.image }}"
+            if [[ -n "$INPUT" && "$INPUT" != "all" && "$INPUT" != "${{ matrix.name }}" ]]; then
+              echo "skip=true" >> $GITHUB_OUTPUT
+              echo "⏭ Skipping ${{ matrix.name }} (dispatch requested: $INPUT)"
+              exit 0
+            fi
+          fi
+          echo "skip=false" >> $GITHUB_OUTPUT
+          echo "🔨 Building ${{ matrix.name }}"
+
       - name: Checkout
+        if: steps.check.outputs.skip != 'true'
         uses: actions/checkout@v4
 
+      # Clean stale buildx builders from persistent Docker cache (prevents GPU capability errors)
+      - name: Clean stale buildx builders
+        if: steps.check.outputs.skip != 'true'
+        run: |
+          for b in $(docker buildx ls --format '{{.Name}}' 2>/dev/null | grep -v default | grep -v '\*' | sort -u); do
+            docker buildx rm "$b" --force 2>/dev/null || true
+          done
+          docker container prune --force 2>/dev/null || true
+
       - name: Set up Docker Buildx
+        if: steps.check.outputs.skip != 'true'
         uses: docker/setup-buildx-action@v3
         with:
           buildkitd-config-inline: |
@@ -108,17 +144,15 @@ jobs:
               http = true
               insecure = true
 
-      # Login to Docker Hub to avoid pull rate limits
       - name: Login to Docker Hub
-        if: vars.DOCKERHUB_USERNAME != ''
+        if: steps.check.outputs.skip != 'true' && vars.DOCKERHUB_USERNAME != ''
         uses: docker/login-action@v3
         with:
           username: ${{ vars.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      # Configure Gitea registry auth (create config.json directly for HTTP registry)
       - name: Configure Gitea Registry Auth
-        if: github.event_name != 'pull_request'
+        if: steps.check.outputs.skip != 'true' && github.event_name != 'pull_request'
         run: |
           AUTH=$(echo -n "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_TOKEN }}" | base64 -w0)
           mkdir -p ~/.docker
@@ -134,219 +168,32 @@ jobs:
           echo "Auth configured for ${{ env.REGISTRY_HOST }}"
 
       - name: Extract metadata
+        if: steps.check.outputs.skip != 'true'
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.REGISTRY }}/ray-worker-nvidia
+          images: ${{ env.REGISTRY }}/ray-worker-${{ matrix.name }}
           tags: |
             type=raw,value=${{ needs.determine-version.outputs.version }}
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push
+        if: steps.check.outputs.skip != 'true'
         uses: docker/build-push-action@v5
         with:
           context: .
-          file: dockerfiles/Dockerfile.ray-worker-nvidia
+          file: dockerfiles/${{ matrix.dockerfile }}
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/ray-worker-nvidia:buildcache
-          cache-to: type=registry,ref=${{ env.REGISTRY }}/ray-worker-nvidia:buildcache,mode=max,image-manifest=true,compression=zstd
-
-  build-rdna2:
-    needs: [determine-version]
-    if: |
-      !contains(github.event.head_commit.message, '[skip images]') &&
-      !contains(github.event.head_commit.message, '[ray-serve only]') &&
-      (github.event_name != 'workflow_dispatch' || github.event.inputs.image == 'all' || github.event.inputs.image == 'rdna2')
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-        with:
-          buildkitd-config-inline: |
-            [registry."gitea-http.gitea.svc.cluster.local:3000"]
-              http = true
-              insecure = true
-
-      - name: Login to Docker Hub
-        if: vars.DOCKERHUB_USERNAME != ''
-        uses: docker/login-action@v3
-        with:
-          username: ${{ vars.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      # Configure Gitea registry auth (create config.json directly for HTTP registry)
-      - name: Configure Gitea Registry Auth
-        if: github.event_name != 'pull_request'
-        run: |
-          AUTH=$(echo -n "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_TOKEN }}" | base64 -w0)
-          mkdir -p ~/.docker
-          cat > ~/.docker/config.json << EOF
-          {
-            "auths": {
-              "${{ env.REGISTRY_HOST }}": {
-                "auth": "$AUTH"
-              }
-            }
-          }
-          EOF
-          echo "Auth configured for ${{ env.REGISTRY_HOST }}"
-
-      - name: Extract metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/ray-worker-rdna2
-          tags: |
-            type=raw,value=${{ needs.determine-version.outputs.version }}
-            type=raw,value=latest,enable={{is_default_branch}}
-
-      - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          file: dockerfiles/Dockerfile.ray-worker-rdna2
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/ray-worker-rdna2:buildcache
-          cache-to: type=registry,ref=${{ env.REGISTRY }}/ray-worker-rdna2:buildcache,mode=max,image-manifest=true,compression=zstd
-
-  build-strixhalo:
-    needs: [determine-version]
-    if: |
-      !contains(github.event.head_commit.message, '[skip images]') &&
-      !contains(github.event.head_commit.message, '[ray-serve only]') &&
-      (github.event_name != 'workflow_dispatch' || github.event.inputs.image == 'all' || github.event.inputs.image == 'strixhalo')
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-        with:
-          buildkitd-config-inline: |
-            [registry."gitea-http.gitea.svc.cluster.local:3000"]
-              http = true
-              insecure = true
-
-      - name: Login to Docker Hub
-        if: vars.DOCKERHUB_USERNAME != ''
-        uses: docker/login-action@v3
-        with:
-          username: ${{ vars.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      # Configure Gitea registry auth (create config.json directly for HTTP registry)
-      - name: Configure Gitea Registry Auth
-        if: github.event_name != 'pull_request'
-        run: |
-          AUTH=$(echo -n "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_TOKEN }}" | base64 -w0)
-          mkdir -p ~/.docker
-          cat > ~/.docker/config.json << EOF
-          {
-            "auths": {
-              "${{ env.REGISTRY_HOST }}": {
-                "auth": "$AUTH"
-              }
-            }
-          }
-          EOF
-          echo "Auth configured for ${{ env.REGISTRY_HOST }}"
-
-      - name: Extract metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/ray-worker-strixhalo
-          tags: |
-            type=raw,value=${{ needs.determine-version.outputs.version }}
-            type=raw,value=latest,enable={{is_default_branch}}
-
-      - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          file: dockerfiles/Dockerfile.ray-worker-strixhalo
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/ray-worker-strixhalo:buildcache
-          cache-to: type=registry,ref=${{ env.REGISTRY }}/ray-worker-strixhalo:buildcache,mode=max,image-manifest=true,compression=zstd
-
-  build-intel:
-    needs: [determine-version]
-    if: |
-      !contains(github.event.head_commit.message, '[skip images]') &&
-      !contains(github.event.head_commit.message, '[ray-serve only]') &&
-      (github.event_name != 'workflow_dispatch' || github.event.inputs.image == 'all' || github.event.inputs.image == 'intel')
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-        with:
-          buildkitd-config-inline: |
-            [registry."gitea-http.gitea.svc.cluster.local:3000"]
-              http = true
-              insecure = true
-
-      - name: Login to Docker Hub
-        if: vars.DOCKERHUB_USERNAME != ''
-        uses: docker/login-action@v3
-        with:
-          username: ${{ vars.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      # Configure Gitea registry auth (create config.json directly for HTTP registry)
-      - name: Configure Gitea Registry Auth
-        if: github.event_name != 'pull_request'
-        run: |
-          AUTH=$(echo -n "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_TOKEN }}" | base64 -w0)
-          mkdir -p ~/.docker
-          cat > ~/.docker/config.json << EOF
-          {
-            "auths": {
-              "${{ env.REGISTRY_HOST }}": {
-                "auth": "$AUTH"
-              }
-            }
-          }
-          EOF
-          echo "Auth configured for ${{ env.REGISTRY_HOST }}"
-
-      - name: Extract metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/ray-worker-intel
-          tags: |
-            type=raw,value=${{ needs.determine-version.outputs.version }}
-            type=raw,value=latest,enable={{is_default_branch}}
-
-      - name: Build and push
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          file: dockerfiles/Dockerfile.ray-worker-intel
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/ray-worker-intel:buildcache
-          cache-to: type=registry,ref=${{ env.REGISTRY }}/ray-worker-intel:buildcache,mode=max,image-manifest=true,compression=zstd
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/ray-worker-${{ matrix.name }}:buildcache
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/ray-worker-${{ matrix.name }}:buildcache,mode=max,image-manifest=true,compression=zstd
 
   release:
     name: Release
     runs-on: ubuntu-latest
-    needs: [determine-version, build-nvidia, build-rdna2, build-strixhalo, build-intel]
-    if: needs.determine-version.outputs.should_release == 'true' && github.ref == 'refs/heads/main' && github.event_name == 'push'
+    needs: [determine-version, build]
+    if: "needs.determine-version.outputs.should_release == 'true' && github.ref == 'refs/heads/main' && github.event_name == 'push'"
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -366,16 +213,11 @@ jobs:
   notify:
     name: Notify
     runs-on: ubuntu-latest
-    # Don't depend on release - notify should run even if release never starts
-    needs: [determine-version, build-nvidia, build-rdna2, build-strixhalo, build-intel]
+    needs: [determine-version, build]
     if: always()
     steps:
       - name: Notify on success
-        if: |
-          (needs.build-nvidia.result == 'success' || needs.build-nvidia.result == 'skipped') &&
-          (needs.build-rdna2.result == 'success' || needs.build-rdna2.result == 'skipped') &&
-          (needs.build-strixhalo.result == 'success' || needs.build-strixhalo.result == 'skipped') &&
-          (needs.build-intel.result == 'success' || needs.build-intel.result == 'skipped')
+        if: "needs.build.result == 'success' || needs.build.result == 'skipped'"
         run: |
           curl -s \
             -H "Title: ✅ Images Built: ${{ gitea.repository }}" \
@@ -384,18 +226,11 @@ jobs:
             -H "Click: ${{ gitea.server_url }}/${{ gitea.repository }}/actions/runs/${{ gitea.run_id }}" \
             -d "Branch: ${{ gitea.ref_name }}
           Version: ${{ needs.determine-version.outputs.version }} (${{ needs.determine-version.outputs.bump }})
-          nvidia: ${{ needs.build-nvidia.result }}
-          rdna2: ${{ needs.build-rdna2.result }}
-          strixhalo: ${{ needs.build-strixhalo.result }}
-          intel: ${{ needs.build-intel.result }}" \
+          Build: ${{ needs.build.result }}" \
             ${{ env.NTFY_URL }}/gitea-ci
 
       - name: Notify on failure or cancellation
-        if: |
-          needs.build-nvidia.result == 'failure' || needs.build-nvidia.result == 'cancelled' ||
-          needs.build-rdna2.result == 'failure' || needs.build-rdna2.result == 'cancelled' ||
-          needs.build-strixhalo.result == 'failure' || needs.build-strixhalo.result == 'cancelled' ||
-          needs.build-intel.result == 'failure' || needs.build-intel.result == 'cancelled'
+        if: "needs.build.result == 'failure' || needs.build.result == 'cancelled'"
         run: |
           curl -s \
             -H "Title: ❌ Image Build Failed: ${{ gitea.repository }}" \
@@ -404,8 +239,5 @@ jobs:
             -H "Click: ${{ gitea.server_url }}/${{ gitea.repository }}/actions/runs/${{ gitea.run_id }}" \
             -d "Branch: ${{ gitea.ref_name }}
           Version: ${{ needs.determine-version.outputs.version }}
-          nvidia: ${{ needs.build-nvidia.result }}
-          rdna2: ${{ needs.build-rdna2.result }}
-          strixhalo: ${{ needs.build-strixhalo.result }}
-          intel: ${{ needs.build-intel.result }}" \
+          Build: ${{ needs.build.result }}" \
             ${{ env.NTFY_URL }}/gitea-ci