gistfile1.txt

@OnlyIn(Dist.CLIENT)
    private static void registerClientDataGen() {
        generator = DataGeneratorFactory.createEEDataGenerator();
        ExistingFileHelper existingFileHelper = new ExistingFileHelper(ImmutableList.of(), ImmutableSet.of(), false, null, null);

        generator.addProvider(isClient(), new BlockStatesAndModelsGen(generator, existingFileHelper));
        generator.addProvider(isClient(), new ItemModelsGen(generator, existingFileHelper));
        generator.addProvider(isClient(), new LangGen(generator));
        if (CREATE_LOADED) generator.addProvider(isClient(), new CreateDataGen.CreateItemModels(generator, existingFileHelper));
        if (BLOODMAGIC_LOADED) generator.addProvider(isClient(), new BloodMagicDataGen.BloodMagicItemModels(generator, existingFileHelper));
        if (MEKANISM_LOADED) generator.addProvider(isClient(), new MekanismDataGen.MekanismItemModels(generator, existingFileHelper));

    }

    private static void registerServerDataGen() {
        generator = DataGeneratorFactory.createEEDataGenerator();
        ExistingFileHelper existingFileHelper = new ExistingFileHelper(ImmutableList.of(), ImmutableSet.of(), false, null, null);

        BlockTagsGen blockTagsGeneration = new BlockTagsGen(generator, existingFileHelper);
        generator.addProvider(isServer(), new ItemTagsGen(generator, blockTagsGeneration, existingFileHelper));
        generator.addProvider(isServer(), blockTagsGeneration);
        generator.addProvider(isServer(), new BlockHarvestTagsGen.BlockHarvestLevelTagsGen(generator, existingFileHelper));
        generator.addProvider(isServer(), new BlockHarvestTagsGen.BlockHarvestToolTagsGen(generator, existingFileHelper));
        generator.addProvider(isServer(), new FluidTagsGen(generator, existingFileHelper));
        generator.addProvider(isServer(), new RecipesGen(generator));
        generator.addProvider(isServer(), new LootTablesGen(generator));
        generator.addProvider(isServer(), new OreFeatureDataGen(generator));

        if (CREATE_LOADED) {
            generator.addProvider(isServer(), new CreateDataGen.CreateItemTags(generator, blockTagsGeneration, existingFileHelper));
            generator.addProvider(isServer(), new CreateDataGen.CreateRecipes(generator));
        }
        if (BLOODMAGIC_LOADED) {
            generator.addProvider(isServer(), new BloodMagicDataGen.BloodMagicItemTags(generator, blockTagsGeneration, existingFileHelper));
            generator.addProvider(isServer(), new BloodMagicDataGen.BloodMagicRecipes(generator));
        }
        if (ARSNOUVEAU_LOADED) generator.addProvider(isServer(), new ArsNouveauDataGen.ArsNouveauRecipes(generator));
        if (OCCULTISM_LOADED) generator.addProvider(isServer(), new OccultismDataGen.OccultismRecipes(generator));
        if (THERMALSERIES_LOADED) generator.addProvider(isServer(), new ThermalDataGen.ThermalRecipes(generator));
        if (MEKANISM_LOADED) {
            generator.addProvider(isServer(), new MekanismDataGen.MekanismItemTags(generator, blockTagsGeneration, existingFileHelper));
            generator.addProvider(isServer(), new MekanismDataGen.MekanismSlurryTags(generator, existingFileHelper));
            generator.addProvider(isServer(), new MekanismDataGen.MekanismRecipes(generator));
        }
    }

    private static void registerDataGen() {
        if (isClient()) {
            registerClientDataGen();
        } else {
            registerServerDataGen();
        }
    }

    private static boolean isServer() {
        return FMLEnvironment.dist == Dist.DEDICATED_SERVER;
    }

    private static boolean isClient() {
        return FMLEnvironment.dist == Dist.CLIENT;
    }

    public static void generate() {
        if (!hasGenerated) {
            try {
                if(generator == null)
                    registerDataGen();
                    generator.run();
            } catch (IOException e) {
                e.printStackTrace();
            }
            hasGenerated = true;
        }
    }