IF (APPLE)
    EXECUTE_PROCESS(COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_CURRENT_SOURCE_DIR}/libruby187.osx.tar.gz
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
    SET(RUBYLIB ${CMAKE_CURRENT_BINARY_DIR}/libruby.dylib)
ELSEIF(UNIX)
    EXECUTE_PROCESS(COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_CURRENT_SOURCE_DIR}/libruby187.linux.tar.gz
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
    FILE(RENAME ${CMAKE_CURRENT_BINARY_DIR}/libruby1.8.so.1.8.7 ${CMAKE_CURRENT_BINARY_DIR}/libruby.so)
    SET(RUBYLIB ${CMAKE_CURRENT_BINARY_DIR}/libruby.so)
ELSE()
    EXECUTE_PROCESS(COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_CURRENT_SOURCE_DIR}/msvcrtruby187.tar.gz
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
    FILE(RENAME ${CMAKE_CURRENT_BINARY_DIR}/msvcrt-ruby18.dll ${CMAKE_CURRENT_BINARY_DIR}/libruby.dll)
    SET(RUBYLIB ${CMAKE_CURRENT_BINARY_DIR}/libruby.dll)
ENDIF()

IF (APPLE OR UNIX)
    SET(RUBYAUTOGEN ruby-autogen-gcc.rb)
ELSE (APPLE OR UNIX)
    SET(RUBYAUTOGEN ruby-autogen-win.rb)
ENDIF (APPLE OR UNIX)

ADD_CUSTOM_COMMAND(
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${RUBYAUTOGEN}
    COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/codegen.pl ${dfhack_SOURCE_DIR}/library/include/df/codegen.out.xml ${CMAKE_CURRENT_BINARY_DIR}/${RUBYAUTOGEN} ${CMAKE_SYSTEM_NAME} ${DFHACK_BUILD_ARCH}
    # cmake quirk: depending on codegen.out.xml or generate_headers only is not enough, needs both
    # test by manually patching any library/xml/moo.xml, run make ruby-autogen-rb -j2, and check build/plugins/ruby/ruby-autogen.rb for patched xml data
    DEPENDS generate_headers ${dfhack_SOURCE_DIR}/library/include/df/codegen.out.xml ${CMAKE_CURRENT_SOURCE_DIR}/codegen.pl
    COMMENT ${RUBYAUTOGEN}
)
ADD_CUSTOM_TARGET(ruby-autogen-rb DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${RUBYAUTOGEN})

INCLUDE_DIRECTORIES("${dfhack_SOURCE_DIR}/depends/tthread")

DFHACK_PLUGIN(ruby ruby.cpp LINK_LIBRARIES dfhack-tinythread)
ADD_DEPENDENCIES(ruby ruby-autogen-rb)

INSTALL(FILES ${RUBYLIB} DESTINATION ${DFHACK_LIBRARY_DESTINATION})

INSTALL(DIRECTORY .
        DESTINATION hack/ruby
        FILES_MATCHING PATTERN "*.rb")

INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/${RUBYAUTOGEN} DESTINATION hack/ruby)