add format rule and fix CI

.github/workflows/ci.yml

@@ -1,31 +0,0 @@
-name: CI
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-jobs:
-  lint:
-    name: Linting/style checks
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.13'
-          check-latest: true
-
-      - name: Install pre-commit
-        run: pip install pre-commit
-
-      - name: Cache pre-commit hooks
-        uses: actions/cache@v4
-        with:
-          path: ~/.cache/pre-commit/
-          # Invalidate the cache if the pre-commit config changes or the Python version changes
-          key: pre-commit-cache|${{ env.pythonLocation }}|${{ hashFiles('.pre-commit-config.yaml') }}
-
-      - name: Run pre-commit checks
-        run: pre-commit run --all-files --verbose

.github/workflows/format.yml

@@ -0,0 +1,32 @@
+name: Check Format
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  format:
+    runs-on: ubuntu-24.04
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+    # Checkout the repository (shallow clone)
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+        submodules: recursive
+
+    # Set Git config
+    - name: Git config
+      run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
+
+    # Run formatter
+    - name: Run clang-format
+      run: find include libs src -name *.h -o -name *.c -o -name *.hpp -o -name *.cpp | xargs clang-format -i
+
+    # Cancel if there's a diff
+    - name: Check status
+      run: git diff --name-only --exit-code