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Patric Stout

Codechange: rework how grf and ob[msg] are generated

For grfs, it now uses CMake scripts to do its job, and both grf
files are split into their own folder to make more clear what is
going on. Additionally, it no longer builds in-source (although the
resulting grf is copied back in the source folder).

For ob[msg] it now uses CMake scripts to generate the translation
files; the result is no longer stored in-source (but in the build
folder).

Although all files are available to create the GRFs and basesets, it
won't really work till CMake is introduced (which will happen in a
few commits from here)

add_subdirectory(openttd)
add_subdirectory(orig_extra)

set(BASESET_SOURCE_FILES
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_dos.obg
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_dos_de.obg
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_win.obg
        ${CMAKE_CURRENT_SOURCE_DIR}/no_music.obm
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_dos.obm
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_tto.obm
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_win.obm
        ${CMAKE_CURRENT_SOURCE_DIR}/no_sound.obs
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_dos.obs
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_win.obs
)
set(BASESET_OTHER_SOURCE_FILES
        ${CMAKE_CURRENT_SOURCE_DIR}/openttd.grf
        ${CMAKE_CURRENT_SOURCE_DIR}/opntitle.dat
        ${CMAKE_CURRENT_SOURCE_DIR}/orig_extra.grf
)

# Done by the subdirectories, if nforenum / grfcodec is installed
if (NFORENUM_FOUND AND GRFCODEC_FOUND)
    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/openttd.grf PROPERTIES GENERATED TRUE)
    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/orig_extra.grf PROPERTIES GENERATED TRUE)

    list(APPEND BASESET_BINARY_FILES openttd.grf)
    list(APPEND BASESET_BINARY_FILES orig_extra.grf)
endif (NFORENUM_FOUND AND GRFCODEC_FOUND)

set(BASESET_EXTRAGRF_FILE ${CMAKE_CURRENT_SOURCE_DIR}/orig_extra.grf)

# Walk over all the baseset files, and generate a command to configure them
foreach(BASESET_SOURCE_FILE IN LISTS BASESET_SOURCE_FILES)
    get_filename_component(BASESET_SOURCE_FILE_NAME "${BASESET_SOURCE_FILE}" NAME)
    set(BASESET_BINARY_FILE "${CMAKE_BINARY_DIR}/baseset/${BASESET_SOURCE_FILE_NAME}")

    get_target_property(LANG_SOURCE_FILES language_files LANG_SOURCE_FILES)

    add_custom_command_timestamp(OUTPUT ${BASESET_BINARY_FILE}
            COMMAND ${CMAKE_COMMAND}
                    -DBASESET_SOURCE_FILE=${BASESET_SOURCE_FILE}
                    -DBASESET_BINARY_FILE=${BASESET_BINARY_FILE}
                    -DBASESET_EXTRAGRF_FILE=${BASESET_EXTRAGRF_FILE}
                    -P ${CMAKE_SOURCE_DIR}/cmake/scripts/Baseset.cmake
                    --
                    ${LANG_SOURCE_FILES}
            MAIN_DEPENDENCY ${BASESET_SOURCE_FILE}
            DEPENDS ${LANG_SOURCE_FILES}
                    ${BASESET_EXTRAGRF_FILE}
                    ${CMAKE_SOURCE_DIR}/cmake/scripts/Baseset.cmake
            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
            COMMENT "Generating ${BASESET_SOURCE_FILE_NAME} baseset metadata file"
    )

    list(APPEND BASESET_BINARY_FILES ${BASESET_BINARY_FILE})
endforeach(BASESET_SOURCE_FILE)

# Walk over all the other baseset files, and generate a command to copy them
foreach(BASESET_OTHER_SOURCE_FILE IN LISTS BASESET_OTHER_SOURCE_FILES)
    get_filename_component(BASESET_OTHER_SOURCE_FILE_NAME "${BASESET_OTHER_SOURCE_FILE}" NAME)
    set(BASESET_OTHER_BINARY_FILE "${CMAKE_BINARY_DIR}/baseset/${BASESET_OTHER_SOURCE_FILE_NAME}")

    add_custom_command(OUTPUT ${BASESET_OTHER_BINARY_FILE}
            COMMAND ${CMAKE_COMMAND} -E copy
                    ${BASESET_OTHER_SOURCE_FILE}
                    ${BASESET_OTHER_BINARY_FILE}
            MAIN_DEPENDENCY ${BASESET_OTHER_SOURCE_FILE}
            COMMENT "Copying ${BASESET_OTHER_SOURCE_FILE_NAME} baseset file"
    )

    list(APPEND BASESET_BINARY_FILES ${BASESET_OTHER_BINARY_FILE})
endforeach(BASESET_OTHER_SOURCE_FILE)

# Create a new target which generates all baseset metadata files
add_custom_target_timestamp(baseset_files
        DEPENDS
        ${BASESET_BINARY_FILES}
)

add_library(basesets
        INTERFACE
)
add_dependencies(basesets
        baseset_files
)
add_library(openttd::basesets ALIAS basesets)