[CI][Lint] Retire format.sh and add clang-tidy to GHA workflow

.clang-tidy

@@ -1,4 +1,13 @@
-Checks: >
+---
+InheritParentConfig: true
+ExtraArgs: ['-v']
+FormatStyle: file
+UseColor: true
+WarningsAsErrors: '*'
+ExcludeHeaderFilterRegex: '^(3rdparty|tvm)/.*$'
+
+# NOTE: there must be no spaces before the '-', so put the comma last.
+Checks: >-
   # 1. Retained categories: easier to find bugs/performance issues
   clang-analyzer-*,
   cppcoreguidelines-pro-type-static-cast-downcast,
@@ -47,7 +56,3 @@ Checks: >
   -clang-analyzer-deadcode.DeadStores,
   -clang-analyzer-optin.cplusplus.VirtualCall,
   -clang-diagnostic-tautological-constant-compare,
-
-WarningsAsErrors: '*'
-
-HeaderFilterRegex: '^(?!.*(3rdparty|build)).*$'

.github/workflows/ci.yml

@@ -287,21 +287,39 @@ jobs:
           echo "Clearing uv cache at ${UV_CACHE_DIR} due to failure."
           uv cache clean
 
-      - name: Run format check
-        id: format-check
+      - name: Run clang-tidy
+        id: clang-tidy
+        if: runner.os == 'Linux'
         run: |
-          mkdir -p build
+          echo "\$ $(command -v clang-tidy) --version" && clang-tidy --version
+
+          if [[ -x "$(command -v run-clang-tidy)" ]]; then
+            echo "Using run-clang-tidy from $(command -v run-clang-tidy)"
+            CLANG_TIDY=(run-clang-tidy)
+          else
+            echo "Downloading run-clang-tidy script"
+            wget -O run-clang-tidy.py https://raw.githubusercontent.com/llvm/llvm-project/refs/heads/release/21.x/clang-tools-extra/clang-tidy/tool/run-clang-tidy.py
+            CLANG_TIDY=(uv run --no-project --script -- run-clang-tidy.py)
+          fi
+          if [[ -x "$(command -v clang-apply-replacements)" ]]; then
+            echo "Using clang-apply-replacements from $(command -v clang-apply-replacements)"
+            CLANG_TIDY+=(-fix -clang-apply-replacements-binary="$(command -v clang-apply-replacements)")
+          else
+            echo "::warning::clang-apply-replacements not found in PATH, automatic fixing disabled."
+          fi
+
           # Run cmake to create the build directory with compile_commands.json
-          (
-            cd build
-            cmake .. ${CLANG_TIDY_CMAKE_OPTIONS}  # no quotes here
-          )
+          cmake -S . -B cmake-build --fresh ${CLANG_TIDY_CMAKE_OPTIONS}  # no quotes here
+
+          CXX_FILES=$(find src -type f -iname "*.[ch]pp" -o -iname "*.cc" -o -iname "*.c" -o -iname "*.h")
           rc=0
-          bash format.sh || rc="$?"
-          rm -rf build
-          if [[ "${rc}" -ne 0 ]]; then
-            echo "::error::Format check failed. Please run 'bash format.sh' locally to fix the issues."
-            exit 1
+          "${CLANG_TIDY[@]}" -clang-tidy-binary="$(command -v clang-tidy)" \
+            -p="cmake-build" ${CXX_FILES} || rc="$?"
+          rm -rf cmake-build run-clang-tidy.py
+          if (( rc != 0 )); then
+            echo "::error::clang-tidy found issues (exit code: ${rc}). Please run 'clang-tidy --fix' locally to fix them."
+            git diff --color=always || true
+            exit "${rc}"
           fi
 
       - name: Enable core dump generation (Linux / GitHub-hosted runners)

.gitignore

@@ -97,3 +97,7 @@ tilelang/jit/adapter/cython/.cycache
 
 # claude
 **/.claude
+
+# CMake
+cmake-build/
+cmake-build-*/

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
         args: [--ignore-case]
         files: ^docs/spelling_wordlist\.txt$
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v15.0.7  # sync with requirements-lint.txt
+    rev: v21.1.2  # sync with requirements-lint.txt
     hooks:
       - id: clang-format
         exclude: |
@@ -41,7 +41,7 @@ repos:
             ^.+\.json$
           )
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.14.0  # sync with requirements-lint.txt
+    rev: v0.14.1  # sync with requirements-lint.txt
     hooks:
       - id: ruff-check
         args: [--fix, --exit-non-zero-on-fix]