Remove unnecessary mixin overwrite and turn it into an injection with…

… the same result for more compatibility.

Forge/src/main/java/at/petrak/hexcasting/forge/mixin/ForgeMixinDatagenModLoader.java

@@ -1,61 +1,34 @@
 package at.petrak.hexcasting.forge.mixin;
 
-import net.minecraft.Util;
-import net.minecraft.core.HolderLookup;
-import net.minecraft.data.registries.VanillaRegistries;
-import net.minecraft.server.Bootstrap;
-import net.minecraftforge.common.data.ExistingFileHelper;
-import net.minecraftforge.data.event.GatherDataEvent;
 import net.minecraftforge.data.loading.DatagenModLoader;
-import net.minecraftforge.fml.ModLoader;
-import net.minecraftforge.fml.ModWorkManager;
-import org.apache.logging.log4j.Logger;
-import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Overwrite;
-import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 import java.io.File;
 import java.nio.file.Path;
 import java.util.Collection;
 import java.util.Set;
-import java.util.concurrent.CompletableFuture;
 
 @Mixin(DatagenModLoader.class)
 public abstract class ForgeMixinDatagenModLoader {
-    @Shadow(remap = false) @Final
-    private static Logger LOGGER;
-
-    @Shadow(remap = false)
-    private static GatherDataEvent.DataGeneratorConfig dataGeneratorConfig;
-    @Shadow(remap = false)
-    private static ExistingFileHelper existingFileHelper;
-    @Shadow(remap = false)
-    private static boolean runningDataGen;
 
     /**
      * Make it so non-vanilla registries can actually be tagged.
      */
-    @Overwrite(remap = false)
-    public static void begin(final Set<String> mods, final Path path, final Collection<Path> inputs, Collection<Path> existingPacks,
-                             Set<String> existingMods, final boolean serverGenerators, final boolean clientGenerators, final boolean devToolGenerators, final boolean reportsGenerator,
-                             final boolean structureValidator, final boolean flat, final String assetIndex, final File assetsDir)  {
-        if (mods.contains("minecraft") && mods.size() == 1)
-            return;
-        LOGGER.info("Initializing Data Gatherer for mods {}", mods);
-        runningDataGen = true;
-        Bootstrap.bootStrap();
-        ModLoader.get().gatherAndInitializeMods(ModWorkManager.syncExecutor(), ModWorkManager.parallelExecutor(), ()->{});
+    @Inject(method = "begin", remap = false, at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraftforge/fml/ModLoader;gatherAndInitializeMods(Lnet/minecraftforge/fml/ModWorkManager$DrivenExecutor;Ljava/util/concurrent/Executor;Ljava/lang/Runnable;)V",
+            shift = At.Shift.AFTER
+    ))
+    private static void begin(final Set<String> mods, final Path path, final Collection<Path> inputs, Collection<Path> existingPacks,
+                              Set<String> existingMods, final boolean serverGenerators, final boolean clientGenerators, final boolean devToolGenerators, final boolean reportsGenerator,
+                              final boolean structureValidator, final boolean flat, final String assetIndex, final File assetsDir, CallbackInfo ci) {
+
         if (!mods.contains("forge")) {
             // If we aren't generating data for forge, automatically add forge as an existing so mods can access forge's data
             existingMods.add("forge");
         }
-        CompletableFuture<HolderLookup.Provider> lookupProvider = CompletableFuture.supplyAsync(VanillaRegistries::createLookup, Util.backgroundExecutor());
-        dataGeneratorConfig = new GatherDataEvent.DataGeneratorConfig(mods, path, inputs, lookupProvider, serverGenerators,
-                clientGenerators, devToolGenerators, reportsGenerator, structureValidator, flat);
-        existingFileHelper = new ExistingFileHelper(existingPacks, existingMods, structureValidator, assetIndex, assetsDir);
-        ModLoader.get().runEventGenerator(mc -> new GatherDataEvent(mc, dataGeneratorConfig.makeGenerator(p -> dataGeneratorConfig.isFlat() ? p : p.resolve(mc.getModId()),
-                dataGeneratorConfig.getMods().contains(mc.getModId())), dataGeneratorConfig, existingFileHelper));
-        dataGeneratorConfig.runAll();
     }
 }