CMakeLists.txt

project(git-clang-format-cmake)
cmake_minimum_required(VERSION 2.8)

set(GCF_GIT_PATH "NOTSET" CACHE STRING "Absolute path to the git executable")
set(GCF_PYTHON_NAME "python" CACHE STRING "Name of the python executable, eg. python2")
set(GCF_PYTHON_PATH "NOTSET" CACHE STRING "Absolute path to the python executable")
set(GCF_CLANGFORMAT_PATH "NOTSET" CACHE STRING "Absolute path to the clang-format executable")
set(GCF_CLANGFORMAT_STYLE "file" CACHE STRING "Paremter pass to clang-format -style=<here>")
set(GCF_IGNORE_LIST "" CACHE STRING "Semi colon separeted list of directories to ignore")

if("${GCF_GIT_PATH}" STREQUAL "NOTSET")
	find_program(FIND_GIT git)
	if("${FIND_GIT}" STREQUAL "FIND_GIT-NOTFOUND")
		message(FATAL_ERROR "Could not find 'git' please set GCF_GIT_PATH:STRING")
	else()
		set(GCF_GIT_PATH ${FIND_GIT})
		message(STATUS "Found: ${GCF_GIT_PATH}")
	endif()
else()
	if(NOT EXISTS ${GCF_GIT_PATH})
		message(WARNING "Could not find git: ${GCF_GIT_PATH}")
	else()
		message(STATUS "Found: ${GCF_GIT_PATH}")
	endif()
endif()

if("${GCF_PYTHON_PATH}" STREQUAL "NOTSET")
	find_program(FIND_PYTHON ${GCF_PYTHON_NAME})
	if("${FIND_PYTHON}" STREQUAL "FIND_PYTHON-NOTFOUND")
		message(FATAL_ERROR "Could not find '${GCF_PYTHON_NAME}' please set GCF_PYTHON_PATH:STRING")
	else()
		set(GCF_PYTHON_PATH ${FIND_PYTHON})
		message(STATUS "Found: ${GCF_PYTHON_PATH}")
	endif()
else()
	if(NOT EXISTS ${GCF_PYTHON_PATH})
		message(WARNING "Could not find python: ${GCF_PYTHON_PATH}")
	else()
		message(STATUS "Found: ${GCF_PYTHON_PATH}")
	endif()
endif()

if("${GCF_CLANGFORMAT_PATH}" STREQUAL "NOTSET")
	find_program(FIND_CLANGFORMAT clang-format)
	if("${FIND_CLANGFORMAT}" STREQUAL "FIND_CLANGFORMAT-NOTFOUND")
		message(FATAL_ERROR "Could not find 'clang-format' please set GCF_CLANGFORMAT_PATH:STRING")
	else()
		set(GCF_CLANGFORMAT_PATH ${FIND_CLANGFORMAT})
		message(STATUS "Found: ${GCF_CLANGFORMAT_PATH}")
	endif()
else()
	if(NOT EXISTS ${GCF_CLANGFORMAT_PATH})
		message(WARNING "Could not find clang-format: ${GCF_CLANGFORMAT_PATH}")
	else()
		message(STATUS "Found: ${GCF_CLANGFORMAT_PATH}")
	endif()
endif()

set(GCF_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/git-cmake-format.py)
string(REGEX REPLACE "\\\\" "/" GCF_GIT_PATH ${GCF_GIT_PATH})
string(REGEX REPLACE "\\\\" "/" GCF_PYTHON_PATH ${GCF_PYTHON_PATH})
string(REGEX REPLACE "\\\\" "/" GCF_CLANGFORMAT_PATH ${GCF_CLANGFORMAT_PATH})

execute_process(COMMAND git rev-parse --show-toplevel
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
  OUTPUT_VARIABLE GCF_GIT_ROOT
  OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT GCF_GIT_ROOT)
  message(WARNING "Not in a git repository")
else()
  message(STATUS "Found git root: ${GCF_GIT_ROOT}")
endif()

configure_file(
	${CMAKE_CURRENT_SOURCE_DIR}/git-pre-commit-hook
  ${GCF_GIT_ROOT}/.git/hooks/pre-commit)

add_custom_target(format ALL
	${GCF_PYTHON_PATH} ${GCF_SCRIPT} --cmake ${GCF_GIT_PATH} ${GCF_CLANGFORMAT_PATH} -style=${GCF_CLANGFORMAT_STYLE} -ignore=${GCF_IGNORE_LIST}
	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})