cmake module for running nimrod compiler

FindNim.cmake

include(CMakeParseArguments)

find_program(NIM_EXECUTABLE nimrod PATHS ENV PATH)
mark_as_advanced(NIM_EXECUTABLE)

# Determine the valac version
if(NIM_EXECUTABLE)
    execute_process(COMMAND ${NIM_EXECUTABLE} "--version" 
        OUTPUT_VARIABLE NIM_VERSION
        OUTPUT_STRIP_TRAILING_WHITESPACE)
    STRING(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" NIM_VERSION ${NIM_VERSION})
endif(NIM_EXECUTABLE)

# Handle the QUIETLY and REQUIRED arguments, which may be given to the find call.
# set NIM_FOUND to TRUE if Nimrod has been found 

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Nim
    REQUIRED_VARS NIM_EXECUTABLE
    VERSION_VAR NIM_VERSION)

set(NIM_USE_FILE "${CMAKE_CURRENT_LIST_DIR}/UseNim.cmake")

UseNim.cmake

include(CMakeParseArguments)

function(add_nim_executable )
    cmake_parse_arguments(ARGS "" "TARGET" "SOURCES" ${ARGN})

    # collect set of input source files
    set(in_files "")
    foreach(src ${ARGS_SOURCES} ${ARGS_UNPARSED_ARGUMENTS})
        list(APPEND in_files "${CMAKE_CURRENT_SOURCE_DIR}/${src}")
    endforeach(src ${ARGS_SOURCES} ${ARGS_UNPARSED_ARGUMENTS})

    # set the target binary and nim cache directory
    set(nim_target "${CMAKE_CURRENT_BINARY_DIR}/${ARGS_TARGET}")
    set(DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/nimcache")

    # add target to trigger the nimrod compiler
    add_custom_target(
    	nim ALL
    	COMMAND
        	${NIM_EXECUTABLE} "c" "--nimcache:" ${DIRECTORY} "--out:" ${nim_target} ${in_files}
    	DEPENDS
        	${in_files}
    )
endfunction(add_nim_executable)