1 files changed, 48 insertions, 0 deletions
diff --git a/cmake/ClangDetectTool.cmake b/cmake/ClangDetectTool.cmake
new file mode 100644
index 0000000..a1ecd56
--- /dev/null
+++ b/cmake/ClangDetectTool.cmake
@@ -0,0 +1,48 @@
+function (clang_detect_tool VAR NAME OPTS)
+	set(NAMES "")
+	foreach(CNT RANGE 12 22)
+		list(APPEND NAMES "${NAME}-${CNT}")
+	endforeach()
+	list(REVERSE NAMES)
+	list(APPEND NAMES ${NAME})
+
+	find_program(${VAR}
+		NAMES ${NAMES}
+		${OPTS}
+	)
+	if (NOT ${VAR})
+		message(WARNING "clang tool ${NAME} (${VAR}) not detected, skipping")
+		unset(${VAR})
+		return()
+	endif()
+
+	execute_process(
+		COMMAND ${${VAR}} "--version"
+		OUTPUT_VARIABLE _CLANG_TOOL_VERSION
+		RESULT_VARIABLE _CLANG_TOOL_VERSION_FAILED
+	)
+
+	if (_CLANG_TOOL_VERSION_FAILED)
+		message(WARNING "A problem was encounterd with ${${VAR}}")
+		message(WARNING "${_CLANG_TOOL_VERSION_FAILED}")
+		unset(${VAR})
+		return()
+	endif()
+
+	string(REGEX MATCH "([7-9]|[1-9][0-9])\\.[0-9]\\.[0-9]" CLANG_TOOL_VERSION
+		"${_CLANG_TOOL_VERSION}")
+
+	if (NOT CLANG_TOOL_VERSION)
+		message(WARNING "problem parsing ${NAME} version for ${${VAR}}")
+		unset(${VAR})
+		return()
+	endif()
+
+	set(_CLANG_TOOL_MINIMUM_VERSION "12.0.0")
+	if (${CLANG_TOOL_VERSION} VERSION_LESS ${_CLANG_TOOL_MINIMUM_VERSION})
+		message(WARNING "clang-format version ${CLANG_TOOL_VERSION} not supported")
+		message(WARNING "Minimum version required: ${_CLANG_TOOL_MINIMUM_VERSION}")
+		unset(${VAR})
+		return()
+	endif()
+endfunction()