util.cmake

# Copyright 2014-2016 the openage authors. See copying.md for legal info.

set(AUTOGEN_WARNING "warning: auto-generated file by cmake. look at the template file instead.")

function(pretty_print_target type targetname targetproperties)
	# pretty-prints a new target; tries to group target types to make stuff look more clean.
	get_property(previous_type GLOBAL PROPERTY SFT_TARGETPRINTER_CURRENT_TYPE)
	if(NOT "${type}" STREQUAL "${previous_type}")
		message("")
		message("${type}")
	endif()
	set_property(GLOBAL PROPERTY SFT_TARGETPRINTER_CURRENT_TYPE "${type}")

	string(STRIP "${targetname}" targetname)
	string(STRIP "${targetproperties}" targetproperties)

	string(LENGTH "${targetname}" targetnamelength)
	foreach(tmp RANGE ${targetnamelength} 50)
		set(targetname "${targetname} ")
	endforeach()

	set(pretty_message "${targetname} ${targetproperties}")
	string(STRIP "${pretty_message}" pretty_message)
	message("\t${pretty_message}")
endfunction()


function(write_on_change filename content)
	# write the content to filename if it is different than
	# what's already in that file (if exists)
	# if the file doesn't exist, create it.

	unset(current_content)

	if(EXISTS ${filename})
		file(READ ${filename} current_content)
	endif()

	if(NOT current_content STREQUAL content)
		file(WRITE "${filename}" "${content}")
	endif()
endfunction()