fetch version for initializer automatically.

Set minecraft dependency version to flat out the one compiled against. Supporting multiple minecraft versions need's way more work, since Mojang breaks round about everything every sub version.
This change will ease the error-prone bumping of versions at multiple places.

Author: FireInstall

build.gradle

@@ -9,6 +9,7 @@ targetCompatibility = JavaVersion.VERSION_21
 archivesBaseName = project.archives_base_name
 version = project.mod_version
 group = project.maven_group
+String minecraftVersion = project.minecraft_version
 
 repositories {
     // Add repositories to retrieve artifacts from in here.
@@ -36,10 +37,12 @@ dependencies {
 }
 
 processResources {
-    inputs.property "version", project.version
+    inputs.properties "modVersion": project.version,
+            "mcVersion": minecraftVersion
 
     filesMatching("fabric.mod.json") {
-        expand "version": project.version
+        expand "modVersion": project.version,
+               "mcVersion": minecraftVersion
     }
 }
 

src/main/java/com/daniking/backtools/BackTools.java

@@ -3,6 +3,8 @@
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.loader.api.FabricLoader;
+import net.fabricmc.loader.api.Version;
+import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -11,12 +13,13 @@
 public class BackTools implements ModInitializer {
 	public static final Logger LOGGER = LoggerFactory.getLogger(BackTools.class);
 
-	public static final String VERSION = "1.21.4-0";
-
 	@Override
 	public void onInitialize() {
-		BackTools.run(EnvType.SERVER, () -> () -> LOGGER.info("You are loading " + this.getClass().getName() + " on a server." + this.getClass().getName() + " is a client side-only mod!"));
-		BackTools.run(EnvType.CLIENT, () -> () -> LOGGER.info("BackTools V{} Initialized", VERSION));
+		final @NotNull String modName = this.getClass().getSimpleName();
+		final @NotNull Version version = FabricLoader.getInstance().getModContainer(modName.toLowerCase()).orElseThrow().getMetadata().getVersion();
+
+		BackTools.run(EnvType.SERVER, () -> () -> LOGGER.info("You are loading " + modName + " on a server." + modName + " is a client side-only mod!"));
+		BackTools.run(EnvType.CLIENT, () -> () -> LOGGER.info("{} V{} Initialized", modName, version.getFriendlyString()));
 	}
 
 	public static void run(final EnvType type, final Supplier<Runnable> supplier) {

src/main/resources/fabric.mod.json

@@ -1,7 +1,7 @@
 {
   "schemaVersion": 1,
   "id": "backtools",
-  "version": "${version}",
+  "version": "${modVersion}",
   "name": "BackTools",
   "description": "Shows the last used tool on the player's back. Purely aesthetic.",
   "authors": [
@@ -29,7 +29,7 @@
   "depends": {
     "fabricloader": "*",
     "fabric": "*",
-    "minecraft": ">=1.21.4",
+    "minecraft": "=${mcVersion}",
     "cloth-config2": "*"
   }
 }