Implement server data pack installing

gradle.properties

@@ -4,7 +4,7 @@ org.gradle.jvmargs=-Xmx1G
 # check these on https://fabricmc.net/develop/
 minecraft_version=1.20.5
 yarn_mappings=1.20.5+build.1
-loader_version=0.14.21
+loader_version=0.15.0
 # Mod Properties
 mod_version=1.1.0
 maven_group=ml.unbreakinggold

src/main/java/ml/unbreakinggold/datapackinstaller/mixin/server/ServerMainMixin.java

@@ -1,11 +1,40 @@
 package ml.unbreakinggold.datapackinstaller.mixin.server;
 
+import com.llamalad7.mixinextras.sugar.Local;
+import ml.unbreakinggold.datapackinstaller.server.DatapackInstallerServer;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
 import net.minecraft.server.Main;
+import net.minecraft.util.WorldSavePath;
+import net.minecraft.world.level.storage.LevelStorage;
+import org.apache.commons.io.FileUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+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.io.IOException;
+import java.nio.file.Path;
 
 @Mixin(Main.class)
 @Environment(EnvType.SERVER)
 public class ServerMainMixin {
+    @Unique
+    private static final Logger LOGGER = LogManager.getLogger(ServerMainMixin.class);
+
+    @Inject(at = @At(value = "INVOKE", target = "Lnet/minecraft/resource/VanillaDataPackProvider;createManager(Lnet/minecraft/world/level/storage/LevelStorage$Session;)Lnet/minecraft/resource/ResourcePackManager;"), method = "main")
+    private static void onMain(CallbackInfo ci, @Local LevelStorage.Session session) {
+        Path worldDataPackPath = session.getDirectory(WorldSavePath.DATAPACKS);
+        File worldDataPackDir = worldDataPackPath.toFile();
+        File modDataPackDir = DatapackInstallerServer.MAIN_PATH.toFile();
+        try {
+            FileUtils.copyDirectory(modDataPackDir, worldDataPackDir);
+        } catch(IOException exception) {
+            LOGGER.error("Failed to copy data packs to the world.", exception);
+        }
+    }
 }

src/main/java/ml/unbreakinggold/datapackinstaller/server/DatapackInstallerServer.java

@@ -3,10 +3,19 @@
 import net.fabricmc.api.DedicatedServerModInitializer;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
+import net.fabricmc.loader.api.FabricLoader;
+
+import java.io.File;
+import java.nio.file.Path;
 
 @Environment(EnvType.SERVER)
 public class DatapackInstallerServer implements DedicatedServerModInitializer {
+    public static final Path MAIN_PATH = FabricLoader.getInstance().getGameDir().resolve("datapacks");
+
     @Override
     public void onInitializeServer() {
+        File mainFile = MAIN_PATH.toFile();
+
+        if (!mainFile.exists()) mainFile.mkdirs();
     }
 }

src/main/resources/fabric.mod.json

@@ -12,7 +12,7 @@
   },
   "license": "MIT",
   "icon": "assets/DatapackInstaller/icon.png",
-  "environment": "client",
+  "environment": "*",
   "entrypoints": {
     "client": [
       "ml.unbreakinggold.datapackinstaller.client.DatapackInstallerClient"
@@ -25,7 +25,7 @@
     "DatapackInstaller.mixins.json"
   ],
   "depends": {
-    "fabricloader": ">=0.14.21",
+    "fabricloader": ">=0.15.0",
     "minecraft": ">=1.20.5"
   }
 }