Merge pull request #88 from offbyone/ci-check-build

Author: offbyone

.github/workflows/container-build.yml

@@ -90,16 +90,25 @@ jobs:
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Skip the build on the platform if `.skip-${{ matrix.arch }}` exists in ${{ matrix.image }}
+        id: skip_check
+        run: |
+          if test -f "./${{ matrix.image }}/.skip-${{ matrix.arch }}"; then
+            echo DO_NOT_BUILD=true >> "$GITHUB_OUTPUT"
+          fi
       # - uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
       - uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
+        if: steps.skip_check.outputs.DO_NOT_BUILD != 'true'
       - name: Log in to the Github Container registry
+        if: steps.skip_check.outputs.DO_NOT_BUILD != 'true'
         uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
+        if: steps.skip_check.outputs.DO_NOT_BUILD != 'true'
         id: meta
         with:
           images: ghcr.io/offbyone/${{ matrix.image }}
@@ -112,6 +121,7 @@ jobs:
             type=ref,event=pr
 
       - name: Build and push by digest
+        if: steps.skip_check.outputs.DO_NOT_BUILD != 'true'
         id: build
         uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4 # v6.15.0
         with:
@@ -121,19 +131,30 @@ jobs:
           outputs: type=image,name=ghcr.io/offbyone/${{ matrix.image }},push-by-digest=true,name-canonical=true,push=true
 
       - name: Export digest
+        if: steps.skip_check.outputs.DO_NOT_BUILD != 'true'
         run: |
           mkdir -p /tmp/digests-${{ matrix.image }}
           digest="${{ steps.build.outputs.digest }}"
           touch "/tmp/digests-${{ matrix.image }}/${digest#sha256:}"
 
       - name: Upload digest
+        if: steps.skip_check.outputs.DO_NOT_BUILD != 'true'
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: digests-${{ matrix.image }}-${{ matrix.arch }}
           path: /tmp/digests-${{ matrix.image }}/*
           if-no-files-found: error
           retention-days: 1
 
+  check:
+    runs-on: ubuntu-latest
+    name: Check builds
+    needs:
+      - build
+    steps:
+      - name: no-op
+        run: exit 0
+
   merge:
     runs-on: ubuntu-latest
     name: Merge the builds for ${{ matrix.image }}