##### install icons for each size

file( GLOB icon_sizes RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "*" )

foreach( icon_size IN LISTS icon_sizes )
  if( IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${icon_size} )
    file( GLOB icons RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "${icon_size}/*.png" )
    install(
      FILES ${icons}
      DESTINATION ${DATA_INSTALL_DIR}/${PROJECT_NAME}/www/coldmilk/icons/${icon_size}
    )
  endif()
endforeach()