add check workflow

Change-Id: Ib9f4c82cde301397e2f92d9a76b58443dd1a2ca4

.github/workflows/check.yml

@@ -0,0 +1,37 @@
+name: check
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ "*" ]
+    types: [synchronize, opened, reopened, edited]
+  workflow_dispatch:
+
+jobs:
+  check-format:
+    runs-on: ubuntu-latest
+    #strategy:
+    #  matrix:
+    #    example: [default]
+    #    errors: [3]
+    #    #include:
+    #    #  - example: default
+    #    #    errors: 3
+    #    #  - example: format-binary
+    #    #    errors: 2
+    #    #  - example: format-config
+    #    #    errors: 0
+    #    #  - example: format-ignore
+    #    #    errors: 0
+    steps:
+      - uses: actions/checkout@v4
+      - run: |
+          cd example/default
+
+          bazel build \
+            --config=clang-format \
+            --color=yes \
+            //... 2>&1 | tee log
+
+          test 3 -eq $(cat log | grep -c "Wclang-format-violations")