From 2c18d0d3d6c38ed298cfad26f0b622d8bfea5889 Mon Sep 17 00:00:00 2001
From: Francisco Molina <femolina@uc.cl>
Date: Fri, 28 May 2021 11:41:20 +0200
Subject: [PATCH] makefiles/clang-tidy: initial support

---
 Makefile.include            |  2 ++
 makefiles/clang_tidy.inc.mk | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 makefiles/clang_tidy.inc.mk

diff --git a/Makefile.include b/Makefile.include
index 0e66ee4a6e..4d95807a22 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -833,6 +833,8 @@ objdump:
 	$(call check_cmd,$(OBJDUMP),Objdump program)
 	$(OBJDUMP) $(OBJDUMPFLAGS) $(ELFFILE) | less
 
+# inlcude clang-tidy
+include $(RIOTMAKE)/clang_tidy.inc.mk
 # Support Eclipse IDE.
 include $(RIOTMAKE)/eclipse.inc.mk
 
diff --git a/makefiles/clang_tidy.inc.mk b/makefiles/clang_tidy.inc.mk
new file mode 100644
index 0000000000..9161f8c00e
--- /dev/null
+++ b/makefiles/clang_tidy.inc.mk
@@ -0,0 +1,18 @@
+.PHONY: clang-tidy
+
+ifneq (, $(filter clang-tidy,$(MAKECMDGOALS)))
+ifneq (llvm,$(TOOLCHAIN))
+  $(error clang-tidy must be ran with TOOLCHAIN=llvm)
+endif
+endif
+
+FILE_REFEX = '.([CcHh]|[ch]pp)$$'
+DIFF_FILTER ?= 'ACMR'
+BASE_BRANCH ?= master
+
+CLANG_TIDY_CHECKS ?= *
+CLANG_TIDY_SRCS ?= $(shell git diff --diff-filter=$(DIFF_FILTER) --name-only $(BASE_BRANCH) | grep -E $(FILE_REFEX))
+
+clang-tidy:
+	$(Q)cd $(RIOTBASE); \
+	clang-tidy -checks=$(CLANG_TIDY_CHECKS) $(CLANG_TIDY_SRCS) -- $(CFLAGS) $(INCLUDES)