From a39d8f6f4ed2ad0f8435b73bd6b2a35769c6fead Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sun, 16 Aug 2026 15:37:58 +0800
Subject: cmake: Run clang-tidy incrementally in parallel

---
 .../cmake/modules/RCCBackendDeveloperTools.cmake   | 45 ++++++++++++++--------
 1 file changed, 30 insertions(+), 15 deletions(-)

(limited to 'backend/cmake/modules/RCCBackendDeveloperTools.cmake')

diff --git a/backend/cmake/modules/RCCBackendDeveloperTools.cmake b/backend/cmake/modules/RCCBackendDeveloperTools.cmake
index 0313fe6..4c328f9 100644
--- a/backend/cmake/modules/RCCBackendDeveloperTools.cmake
+++ b/backend/cmake/modules/RCCBackendDeveloperTools.cmake
@@ -27,19 +27,34 @@ function(rcc_backend_add_developer_targets)
   if(TidyFiles)
     list(REMOVE_DUPLICATES TidyFiles)
 
-    # LLVM's repository runs clang-tidy-diff.py for changed lines. Keep the
-    # backend's explicit full audit deterministic by invoking clang-tidy once
-    # with the registered translation units instead of using a process pool.
+    # Match LLVM's normal lint path: pass the changed backend lines to its
+    # clang-tidy-diff.py driver, which runs independent translation units in parallel.
     add_custom_target(
       rcc-backend-tidy
       COMMAND
-        "${RCC_BACKEND_CLANG_TIDY}"
-        "--quiet"
+        "${CMAKE_COMMAND}"
+        "-DRCC_TIDY_GIT=${RCC_BACKEND_GIT}"
+        "-DRCC_TIDY_SOURCE_DIR=${RCC_BACKEND_SOURCE_DIR}"
+        "-DRCC_TIDY_BINARY_DIR=${CMAKE_BINARY_DIR}"
+        "-DRCC_TIDY_BASE=${RCC_BACKEND_TIDY_BASE}"
+        "-DRCC_TIDY_JOBS=${RCC_BACKEND_TIDY_JOBS}"
+        "-DRCC_TIDY_DIFF=${RCC_BACKEND_CLANG_TIDY_DIFF}"
+        -P "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/RCCBackendClangTidy.cmake"
+      COMMENT "Running incremental clang-tidy on RCC Backend"
+      USES_TERMINAL
+      VERBATIM
+    )
+
+    add_custom_target(
+      rcc-backend-tidy-all
+      COMMAND
+        "${RCC_BACKEND_RUN_CLANG_TIDY}"
         "-p=${CMAKE_BINARY_DIR}"
-        "--warnings-as-errors=*"
-        ${TidyFiles}
-      COMMAND_EXPAND_LISTS
-      COMMENT "Running clang-tidy on RCC Backend"
+        -j "${RCC_BACKEND_TIDY_JOBS}"
+        -quiet
+        "-warnings-as-errors=*"
+        "${RCC_BACKEND_SOURCE_DIR}/.*"
+      COMMENT "Running full parallel clang-tidy audit on RCC Backend"
       USES_TERMINAL
       VERBATIM
     )
@@ -47,14 +62,14 @@ function(rcc_backend_add_developer_targets)
     add_custom_target(
       rcc-backend-analyze
       COMMAND
-        "${RCC_BACKEND_CLANG_TIDY}"
-        "--quiet"
+        "${RCC_BACKEND_RUN_CLANG_TIDY}"
         "-p=${CMAKE_BINARY_DIR}"
+        -j "${RCC_BACKEND_TIDY_JOBS}"
+        -quiet
         "-checks=-*,clang-analyzer-*"
-        "--warnings-as-errors=*"
-        ${TidyFiles}
-      COMMAND_EXPAND_LISTS
-      COMMENT "Running Clang Static Analyzer checks on RCC Backend"
+        "-warnings-as-errors=*"
+        "${RCC_BACKEND_SOURCE_DIR}/.*"
+      COMMENT "Running full parallel Clang Static Analyzer audit on RCC Backend"
       USES_TERMINAL
       VERBATIM
     )
-- 
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