Build correctly for 1.21

build.gradle

@@ -1,38 +1,37 @@
-// https://github.com/FabricMC/fabric-example-mod/blob/9b028bdcd43190d4f848d5898b89177de6776535/build.gradle#L1
-
 plugins {
-    id 'fabric-loom' version '1.1-SNAPSHOT'
+    id 'fabric-loom' version '1.7-SNAPSHOT'
     id 'maven-publish'
 }
 
-sourceCompatibility = JavaVersion.VERSION_17
-targetCompatibility = JavaVersion.VERSION_17
-
-archivesBaseName = project.archives_base_name
 version = project.mod_version
 group = project.maven_group
 
+base {
+    archivesName = project.archives_base_name
+}
+
 repositories {
-    // Add repositories to retrieve artifacts from in here.
-    // You should only use this when depending on other mods because
-    // Loom adds the essential maven repositories to download Minecraft and libraries from automatically.
-    // See https://docs.gradle.org/current/userguide/declaring_repositories.html
-    // for more information about repositories.
+    // ...
+}
+
+loom {
+    splitEnvironmentSourceSets()
+
+    mods {
+        "hotbarreplace" {
+            sourceSet sourceSets.main
+            // sourceSet sourceSets.client
+        }
+    }
+
 }
 
 dependencies {
-    // To change the versions see the gradle.properties file
     minecraft "com.mojang:minecraft:${project.minecraft_version}"
     mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
     modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
 
-    // Fabric API. This is technically optional, but you probably want it anyway.
     modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
-
-    // Uncomment the following line to enable the deprecated Fabric API modules.
-    // These are included in the Fabric API production distribution and allow you to update your mod to the latest modules at a later more convenient time.
-
-    // modImplementation "net.fabricmc.fabric-api:fabric-api-deprecated:${project.fabric_version}"
 }
 
 processResources {
@@ -44,36 +43,31 @@ processResources {
 }
 
 tasks.withType(JavaCompile).configureEach {
-    // Minecraft 1.18 (1.18-pre2) upwards uses Java 17.
-    it.options.release = 17
+    it.options.release = 21
 }
 
 java {
-    // Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
-    // if it is present.
-    // If you remove this line, sources will not be generated.
     withSourcesJar()
+
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
 }
 
 jar {
     from("LICENSE") {
-        rename { "${it}_${project.archivesBaseName}"}
+        rename { "${it}_${project.base.archivesName.get()}"}
     }
 }
 
-// configure the maven publication
 publishing {
     publications {
-        mavenJava(MavenPublication) {
+        create("mavenJava", MavenPublication) {
+            artifactId = project.archives_base_name
             from components.java
         }
     }
 
-    // See https://docs.gradle.org/current/userguide/publishing_maven.html for information on how to set up publishing.
     repositories {
-        // Add repositories to publish to here.
-        // Notice: This block does NOT have the same function as the block in the top level.
-        // The repositories here will be used for publishing your artifact, not for
-        // retrieving dependencies.
+        // ...
     }
 }

gradle.properties

@@ -1,19 +1,16 @@
-# https://github.com/FabricMC/fabric-example-mod/blob/9b028bdcd43190d4f848d5898b89177de6776535/gradle.properties#L1
-
-# Done to increase the memory available to gradle.
+# Done to increase the memory available to Gradle
 org.gradle.jvmargs=-Xmx1G
 org.gradle.parallel=true
 
 # Fabric Properties
-# check these on https://fabricmc.net/develop
-minecraft_version=1.20.4
-yarn_mappings=1.20.4+build.3
-loader_version=0.15.6
+minecraft_version=1.21
+yarn_mappings=1.21+build.9
+loader_version=0.15.11
 
 # Mod Properties
 mod_version = 0.1.2
-maven_group = io.github.twokilohertz.hotbarreplace
+maven_group = xyz.twokilohertz
 archives_base_name = HotbarReplace
 
 # Dependencies
-fabric_version=0.95.1+1.20.4
+fabric_version=0.100.7+1.21

settings.gradle

@@ -1,14 +1,3 @@
-/*
- * This file was generated by the Gradle 'init' task.
- *
- * The settings file is used to specify which projects to include in your build.
- *
- * Detailed information about configuring a multi-project build in Gradle can be found
- * in the user manual at https://docs.gradle.org/8.0.2/userguide/multi_project_builds.html
- */
-
-// https://github.com/FabricMC/fabric-example-mod/blob/9b028bdcd43190d4f848d5898b89177de6776535/settings.gradle#L1
-
 pluginManagement {
     repositories {
         maven {

src/client/java/xyz/twokilohertz/HotbarReplace.java

@@ -1,6 +1,6 @@
-package io.github.twokilohertz.hotbarreplace;
+package xyz.twokilohertz;
 
-import net.fabricmc.api.ModInitializer;
+import net.fabricmc.api.ClientModInitializer;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.entity.player.PlayerInventory;
@@ -15,13 +15,13 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 
-public class HotbarReplace implements ModInitializer {
+public class HotbarReplace implements ClientModInitializer {
     public static final Logger LOGGER = LoggerFactory.getLogger("hotbarreplace");
     private static final MinecraftClient client = MinecraftClient.getInstance();
     private static final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
 
     @Override
-    public void onInitialize() {
+    public void onInitializeClient() {
         LOGGER.info("HotbarReplace v0.1.2 initialised");
     }
 
@@ -31,7 +31,7 @@ public class HotbarReplace implements ModInitializer {
         if (player.isSpectator())
             return;
 
-        // Creative inventories don't run out of anyway
+        // Creative inventories don't run out of blocks anyway
         if (player.getAbilities().creativeMode)
             return;
 

src/client/java/xyz/twokilohertz/mixin/BlockItemMixin.java

@@ -1,4 +1,4 @@
-package io.github.twokilohertz.hotbarreplace.mixin;
+package xyz.twokilohertz.mixin;
 
 import net.minecraft.item.BlockItem;
 import net.minecraft.item.Item;
@@ -8,7 +8,7 @@ import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-import io.github.twokilohertz.hotbarreplace.HotbarReplace;
+import xyz.twokilohertz.HotbarReplace;
 
 @Mixin(BlockItem.class)
 public class BlockItemMixin {

src/client/resources/fabric.mod.json

@@ -14,19 +14,22 @@
   },
   "license": "MIT",
   "icon": "assets/hotbarreplace/icon.png",
-  "environment": "*",
+  "environment": "client",
   "entrypoints": {
-    "main": [
-      "io.github.twokilohertz.hotbarreplace.HotbarReplace"
+    "client": [
+      "xyz.twokilohertz.HotbarReplace"
     ]
   },
   "mixins": [
-    "hotbarreplace.mixins.json"
+    {
+      "config": "hotbarreplace.mixins.json",
+      "environment": "client"
+    }
   ],
   "depends": {
-    "fabricloader": ">=0.15.6",
-    "fabric-api": "*",
-    "minecraft": "~1.20",
-    "java": ">=17"
+    "fabricloader": ">=0.15.11",
+    "minecraft": "~1.21",
+    "java": ">=21",
+    "fabric-api": "*"
   }
-}
+}

src/client/resources/hotbarreplace.mixins.json

@@ -1,8 +1,7 @@
 {
   "required": true,
-  "minVersion": "0.8",
-  "package": "io.github.twokilohertz.hotbarreplace.mixin",
-  "compatibilityLevel": "JAVA_17",
+  "package": "xyz.twokilohertz.mixin",
+  "compatibilityLevel": "JAVA_21",
   "mixins": [],
   "client": [
     "BlockItemMixin"
@@ -10,4 +9,4 @@
   "injectors": {
     "defaultRequire": 1
   }
-}
+}