test Depot runners for team commits (#6394)

Co-authored-by: ConnorYoh <[email protected]>

.github/workflows/test-build-docker.yml

@@ -12,11 +12,19 @@ on:
         required: false
         type: string
         default: "false"
+      depot_cores:
+        description: "Depot runner vCPU count (used in runs-on). Override for benchmarking."
+        required: false
+        type: string
+        default: "8"
 
 permissions:
   contents: read
 
 jobs:
+  pick:
+    uses: ./.github/workflows/_runner-pick.yml
+
   # TODO: extract a pre-matrix `prepare` job that runs once and produces
   # shared artifacts for the three matrix entries below to consume:
   #   1. `task backend:build` — currently runs 3× in parallel with
@@ -32,7 +40,14 @@ jobs:
   # spring-security=true matrix entry if `task backend:build` and
   # `task backend:build:ci` produce equivalent JARs (verify before wiring).
   test-build-docker-images:
-    runs-on: ubuntu-latest
+    needs: pick
+    runs-on: ${{ needs.pick.outputs.is_fork == 'true' && 'ubuntu-latest' || format('depot-ubuntu-24.04-{0}', inputs.depot_cores || '8') }}
+    permissions:
+      contents: read
+      id-token: write
+    env:
+      USE_DEPOT: ${{ needs.pick.outputs.is_fork != 'true' && inputs.docker-base-changed != 'true' }}
+      DEPOT_TOKEN: ${{ secrets.DEPOT_TOKEN }}
     strategy:
       fail-fast: false
       matrix:
@@ -105,10 +120,16 @@ jobs:
           DISABLE_ADDITIONAL_FEATURES: true
           STIRLING_PDF_DESKTOP_UI: false
 
+      - name: Set up Depot CLI
+        if: env.USE_DEPOT == 'true'
+        uses: depot/setup-action@15c09a5f77a0840ad4bce955686522a257853461 # v1.0.0
+
       - name: Set up QEMU
+        if: env.USE_DEPOT != 'true'
         uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4.0.0
 
       - name: Set up Docker Buildx
+        if: env.USE_DEPOT != 'true'
         id: buildx
         uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
 
@@ -134,7 +155,22 @@ jobs:
             echo "platforms=linux/amd64,linux/arm64/v8" >> "$GITHUB_OUTPUT"
           fi
 
-      - name: Build ${{ matrix.docker-rev }}
+      - name: Build ${{ matrix.docker-rev }} (Depot)
+        if: env.USE_DEPOT == 'true'
+        uses: depot/build-push-action@5f3b3c2e5a00f0093de47f657aeaefcedff27d18 # v1.16.0
+        with:
+          project: ${{ vars.DEPOT_PROJECT_ID }}
+          context: .
+          file: ./${{ matrix.docker-rev }}
+          push: false
+          platforms: ${{ steps.build-params.outputs.platforms }}
+          build-args: |
+            BASE_IMAGE=${{ steps.build-params.outputs.base_image }}
+          provenance: true
+          sbom: true
+
+      - name: Build ${{ matrix.docker-rev }} (Docker fork fallback)
+        if: env.USE_DEPOT != 'true'
         uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
         with:
           builder: ${{ steps.buildx.outputs.name }}
@@ -162,7 +198,14 @@ jobs:
           if-no-files-found: warn
 
   test-build-unoserver-image:
-    runs-on: ubuntu-latest
+    needs: pick
+    runs-on: ${{ needs.pick.outputs.is_fork == 'true' && 'ubuntu-latest' || format('depot-ubuntu-24.04-{0}', inputs.depot_cores || '8') }}
+    permissions:
+      contents: read
+      id-token: write
+    env:
+      USE_DEPOT: ${{ needs.pick.outputs.is_fork != 'true' && inputs.docker-base-changed != 'true' }}
+      DEPOT_TOKEN: ${{ secrets.DEPOT_TOKEN }}
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
@@ -172,14 +215,35 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
+      - name: Set up Depot CLI
+        if: env.USE_DEPOT == 'true'
+        uses: depot/setup-action@15c09a5f77a0840ad4bce955686522a257853461 # v1.0.0
+
       - name: Set up QEMU
+        if: env.USE_DEPOT != 'true'
         uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a # v4.0.0
 
       - name: Set up Docker Buildx
+        if: env.USE_DEPOT != 'true'
         id: buildx
         uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
 
-      - name: Build docker/unoserver/Dockerfile
+      - name: Build docker/unoserver/Dockerfile (Depot)
+        if: env.USE_DEPOT == 'true'
+        uses: depot/build-push-action@5f3b3c2e5a00f0093de47f657aeaefcedff27d18 # v1.16.0
+        with:
+          project: ${{ vars.DEPOT_PROJECT_ID }}
+          context: .
+          file: ./docker/unoserver/Dockerfile
+          push: false
+          load: true
+          platforms: linux/amd64
+          tags: stirling-unoserver:pr-test
+          provenance: false
+          sbom: false
+
+      - name: Build docker/unoserver/Dockerfile (Docker fork fallback)
+        if: env.USE_DEPOT != 'true'
         uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
         with:
           builder: ${{ steps.buildx.outputs.name }}