build(cmake): Add lint rule using clang-format

Origin: #136
Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: rzr

CMakeLists.txt

@@ -30,6 +30,7 @@ if(BUILD_TESTING)
   include(cmake/include/unittest.cmake)
 endif()
 
+include(cmake/include/clang-format.cmake)
 include(cmake/include/doxygen.cmake)
 
 # ##############################################################################

cmake/include/clang-format.cmake

@@ -0,0 +1,19 @@
+# SPDX-FileCopyrightText: Silicon Laboratories Inc. <https://www.silabs.com/>
+# SPDX-License-Identifier: ZLIB
+
+file(GLOB_RECURSE sources_list *.c *.cpp *.h *.hpp)
+list(FILTER sources_list EXCLUDE REGEX ".git/.*")
+list(FILTER sources_list EXCLUDE REGEX "${CMAKE_BINARY_DIR}/.*")
+list(FILTER sources_list EXCLUDE REGEX ".*/ZW_classcmd.h")
+if(NOT ENV{uncrustify_args})
+  set(uncrustify_args --replace)
+endif()
+
+string(REPLACE ";" "\n" sources_list_text "${sources_list}" )
+file(WRITE "${CMAKE_BINARY_DIR}/sources.lst" ${sources_list_text})
+
+add_custom_target(lint
+  COMMAND clang-format -i  --files="${CMAKE_BINARY_DIR}/sources.lst"
+  WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"    
+  DEPENDS "${CMAKE_BINARY_DIR}/sources.lst"
+)

helper.mk

@@ -30,6 +30,7 @@ export CMAKE_GENERATOR
 
 build_dir?=build
 sudo?=sudo
+cmake?=cmake
 
 debian_codename?=bookworm
 
@@ -40,6 +41,7 @@ packages+=python3-defusedxml # For extract_get.py
 # TODO: remove for offline build
 packages+=curl wget python3-pip
 packages+=expect
+package+=clang-format
 
 # For docs
 packages+=graphviz
@@ -231,6 +233,10 @@ all: ${build_dir}/CMakeCache.txt
 #	cmake --build ${<D} \
 #		|| cat ${build_dir}/CMakeFiles/CMakeOutput.log
 	cmake --build ${<D}
+
+cmake/%: ${build_dir}/CMakeCache.txt
+	${cmake} --build ${<D} --target=${@F}
+
 .PHONY: all
 
 ${build_dir}/%: all
@@ -298,14 +304,17 @@ prepare: git/prepare
 	git --version
 	cmake --version
 
-all/default: configure prepare all test dist
+all/default: lint configure prepare all test dist
 	@date -u
 
 run_args?=--help
 run:
 	file -E ${run_file}
 	${run_file} ${run_args}
 
+lint: .clang-format cmake/lint
+	git status
+
 ### @rootfs is faster than docker for env check
 
 rootfs_dir?=/var/tmp/var/lib/machines/${project}