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# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2021 Manuel Bentele <development@manuel-bentele.de>
#
# check if custom Linux kernel script directory was specified
if(NOT KERNEL_SCRIPTS_DIR)
set(KERNEL_SCRIPTS_DIR "/lib/modules/${CMAKE_SYSTEM_VERSION}/build/scripts"
CACHE PATH "Path to Linux kernel scripts directory")
endif(NOT KERNEL_SCRIPTS_DIR)
# find the checkpatch.pl script in the given KERNEL_SCRIPTS_DIR
find_program(CheckPatch_EXECUTABLE
NAMES checkpatch.pl
PATHS ${KERNEL_SCRIPTS_DIR})
# get the checkpatch.pl version
if(CheckPatch_EXECUTABLE)
execute_process(COMMAND ${CheckPatch_EXECUTABLE} --version
OUTPUT_VARIABLE CheckPatch_VERBOSE_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REGEX REPLACE ".*Version:.([0-9]+\\.[0-9]+).*" "\\1" CheckPatch_VERSION "${CheckPatch_VERBOSE_VERSION}")
endif(CheckPatch_EXECUTABLE)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(CheckPatch
FOUND_VAR CheckPatch_FOUND
REQUIRED_VARS CheckPatch_EXECUTABLE
VERSION_VAR CheckPatch_VERSION
FAIL_MESSAGE "checkpatch.pl is not available! Please install checkpatch.pl to lint and format the source code!")
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