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#
# Copyright (C) 2019 by George Cave - gcave@stablecoder.ca
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
#
# clang-format
#
find_program(CLANG_FORMAT_EXE "clang-format")
mark_as_advanced(FORCE CLANG_FORMAT_EXE)
if(CLANG_FORMAT_EXE)
message(STATUS "clang-format found: ${CLANG_FORMAT_EXE}")
else()
message(STATUS "clang-format not found!")
endif()
# Generates a 'format' target using a custom name, files, and include
# directories all being parameters.
#
# Do note that in order for sources to be inherited properly, the source paths
# must be reachable from where the macro is called, or otherwise require a full
# path for proper inheritance.
#
# ~~~
# Required:
# TARGET_NAME - The name of the target to create.
#
# Optional: ARGN - The list of targets OR files to format. Relative and absolute
# paths are accepted.
# ~~~
function(clang_format TARGET_NAME)
if(CLANG_FORMAT_EXE)
set(FORMAT_FILES)
# Check through the ARGN's, determine existent files
foreach(item IN LISTS ARGN)
if(TARGET ${item})
# If the item is a target, then we'll attempt to grab the associated
# source files from it.
get_target_property(_TARGET_TYPE ${item} TYPE)
if(NOT
_TARGET_TYPE
STREQUAL
"INTERFACE_LIBRARY")
get_property(
_TEMP
TARGET ${item}
PROPERTY SOURCES)
foreach(iter IN LISTS _TEMP)
if(EXISTS ${iter})
set(FORMAT_FILES ${FORMAT_FILES} ${iter})
endif()
endforeach()
endif()
elseif(EXISTS ${item})
# Check if it's a full file path
set(FORMAT_FILES ${FORMAT_FILES} ${item})
elseif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${item})
# Check if it's based on the current source dir
set(FORMAT_FILES ${FORMAT_FILES} ${CMAKE_CURRENT_SOURCE_DIR}/${item})
endif()
endforeach()
# Make the target
if(FORMAT_FILES)
if(TARGET ${TARGET_NAME})
message(
ERROR
"Cannot create clang-format target '${TARGET_NAME}', already exists.")
else()
add_custom_target(${TARGET_NAME} COMMAND ${CLANG_FORMAT_EXE} -i -style=file ${FORMAT_FILES})
if(NOT TARGET format)
add_custom_target(format)
endif()
add_dependencies(format ${TARGET_NAME})
endif()
endif()
endif()
endfunction()
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