datamerge.py

def merge(*args, quiet=True):
    import retro
    known_hashes = {}
    for game in retro.list_games():
        shafile = os.path.join(retro.get_game_path(game), 'rom.sha')
        with open(shafile) as f:
            shas = f.read().strip().split('\n')
        for ext, platform in retro.EMU_EXTENSIONS.items():
            if game.endswith('-' + platform):
                break
        for sha in shas:
            known_hashes[sha] = (game, ext)
    for rom in args:
        try:
            data, hash = groom_rom(rom)
        except IOError:
            continue
        if hash in known_hashes:
            game, ext = known_hashes[hash]
            if not quiet:
                print('Importing', game)
            with open(os.path.join(retro.get_game_path(game), 'rom%s' % ext), 'wb') as f:
                f.write(data)