ci: Linter

.github/workflows/formatting.yml

@@ -1,6 +1,6 @@
 name: Check formatting
 
-on: [push, pull_request, workflow_dispatch]
+on: [push, workflow_dispatch]
 
 jobs:
   check_formatting:

.github/workflows/lint.yml

@@ -0,0 +1,26 @@
+name: Linting and extra checks
+
+on: [push, workflow_dispatch]
+
+jobs:
+  run_lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up compiler
+        uses: egor-tensin/setup-clang@v1
+        with:
+          version: latest
+          platform: x64
+      - name: Get all source files
+        run: echo "SRC='$(find src -name "*.[ch]" -o -path src/flamingo -prune -type f)'" >> $GITHUB_ENV
+      - name: Build (with LSP output)
+        run: intercept-build sh build.sh
+      - name: Run clang-tidy
+        run: clang-tidy $SRC
+      - name: Make sure 'mkdir_wrapped' is used everywhere (except for once for 'fsutils.c')
+        run: |
+          if [ $(cat $SRC | grep "[^\"]mkdir(" | wc -l) -gt 1 ]; then
+            echo "Error: 'mkdir' is used in multiple places. Use 'mkdir_wrapped' instead."
+            exit 1
+          fi