add subproject for testing

settings.gradle.kts

@@ -1,2 +1,18 @@
+pluginManagement {
+    repositories {
+        maven {
+            name = "Esnesnos Maven Releases"
+            url = uri("https://maven-esnesnon.ecorous.org/releases")
+        }
+        maven {
+            name = "Esnesnos Maven Snapshots"
+            url = uri("https://maven-esnesnon.ecorous.org/snapshots")
+        }
+        gradlePluginPortal()
+    }
+}
+
 rootProject.name = "nonsense-loader"
 
+include(":minecraft")
+

src/main/java/org/ecorous/esnesnon/nonsense/loader/api/Loader.java

@@ -20,5 +20,6 @@ public interface Loader {
 	Path getGameDir();
 	Path getConfigDir();
 	Path getModsDir();
+	boolean isDevelopment();
 
 }

src/main/java/org/ecorous/esnesnon/nonsense/loader/impl/LoaderImpl.java

@@ -1,6 +1,9 @@
 package org.ecorous.esnesnon.nonsense.loader.impl;
 
 import java.io.*;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -17,6 +20,7 @@ import org.slf4j.LoggerFactory;
 public class LoaderImpl implements Loader {
 	// TODO decide this
 	public static final String MOD_FILE_EXTENSION = ".nonsense";
+	private final boolean DEV_ENV = Boolean.getBoolean("nonsense.development");
 
 	@Getter
 	private final String[] args;
@@ -70,9 +74,36 @@ public class LoaderImpl implements Loader {
 	}
 
 	private void discoverPlugins() {
-		for (NonsensePlugin plugin : ServiceLoader.load(NonsensePlugin.class, classloader)) {
-			plugin.init(this);
-			plugins.add(plugin);
+		List<String> classes = new ArrayList<>();
+		this.getClass().getClassLoader().resources("META-INF/services/"+NonsensePlugin.class.getName()).distinct().forEach(url -> {
+			try (InputStream inputStream = url.openStream()) {
+				new BufferedReader(new InputStreamReader(inputStream)).lines().forEach(classes::add);
+			} catch (IOException e) {
+				e.printStackTrace();
+				// TODO error handling
+				throw new UncheckedIOException(e);
+			}
+		});
+		LOGGER.info("Found plugins: \n{}", String.join("\t\n", classes));
+
+		for (Class<?> c : classes.stream().map((String className) -> {
+			try {
+				return classloader.findClass(className);
+			} catch (ClassNotFoundException e) {
+				// TODO error handling
+				throw new RuntimeException(e);
+			}
+		}).filter(NonsensePlugin.class::isAssignableFrom).toList()) {
+			try {
+				MethodHandle ctor = MethodHandles.publicLookup().findConstructor(c, MethodType.methodType(void.class));
+				NonsensePlugin plugin = (NonsensePlugin) ctor.invoke();
+				plugins.add(plugin);
+				if (plugin.init(this)) {
+					break;
+				}
+			} catch (Throwable e) {
+				LOGGER.error("Failed to instantiate plugin: ", e);
+			}
 		}
 	}
 
@@ -92,4 +123,9 @@ public class LoaderImpl implements Loader {
 		}
 		return res;
 	}
+
+	@Override
+	public boolean isDevelopment() {
+		return DEV_ENV;
+	}
 }

src/main/java/org/ecorous/esnesnon/nonsense/loader/impl/plugin/game/Minecraft.java

@@ -1,5 +1,7 @@
 package org.ecorous.esnesnon.nonsense.loader.impl.plugin.game;
 
+import com.google.gson.Gson;
+import com.google.gson.JsonObject;
 import org.ecorous.esnesnon.nonsense.loader.impl.Discovery;
 import org.ecorous.esnesnon.nonsense.loader.impl.LoaderImpl;
 import org.ecorous.esnesnon.nonsense.loader.impl.plugin.NonsensePlugin;
@@ -35,12 +37,11 @@ public class Minecraft implements NonsensePlugin {
 	public boolean init(LoaderImpl loader) {
 		Path gameJar = findGame();
 		if (gameJar == null){
-			LOGGER.error("Could not find game jar!");
+			LOGGER.error("Could not find game jar on classpath! ({})", System.getProperty("java.class.path", ""));
 			return false;
 			//throw new IllegalStateException("Could not find game jar!");
 		}
 
-		version = loader.getArgument("version");
 		remappedGamePath = loader.getGameDir().resolve(".nonsense/remappedJars").resolve(version).resolve("game-"+version+"-remapped.jar");
 
 		if (!Files.exists(remappedGamePath)){
@@ -64,7 +65,7 @@ public class Minecraft implements NonsensePlugin {
 		}).forEach(LoaderImpl.getInstance().getClassloader()::addURL);
 		LOGGER.info("Found {} mods", mods.size());
 
-		if (!Files.exists(remappedGamePath)){
+		if (!Files.exists(remappedGamePath) && !loader.isDevelopment()){
 			try {
 				NonsenseRemapper.run(version, gameJar, remappedGamePath, true, false);
 			} catch (Throwable e) {
@@ -82,27 +83,43 @@ public class Minecraft implements NonsensePlugin {
 
 	private Path findGame() {
 		LOGGER.info("Locating game..");
+		String jar = System.getProperty("nonsense.plugin.minecraft.gameJar");
+		if (jar != null){
+			Path p = Paths.get(jar);
+			if (checkLocation(p)){
+				return p;
+			}
+		}
+
 		for (String s : System.getProperty("java.class.path", "").split(File.pathSeparator)) {
 			Path p = Paths.get(s);
-			if (!Files.exists(p) || Files.isDirectory(p)){
-				continue;
-			}
-			try (FileSystem fs = FileSystems.newFileSystem(p)) {
-				for (String n : MINECRAFT_CLASSES) {
-					if (Files.exists(fs.getPath(n))){
-						LOGGER.info("Found game: {}", p);
-						foundMainClass = n.substring(0, n.length()-6).replace("/", ".");
-						return p;
-					}
-				}
-			} catch (IOException e) {
-				throw new RuntimeException(e);
+			if (checkLocation(p)){
+				return p;
 			}
 		}
 		LOGGER.warn("Could not locate game!");
 		return null;
 	}
 
+	private boolean checkLocation(Path jar){
+		if (!Files.exists(jar) || Files.isDirectory(jar)){
+			return false;
+		}
+		try (FileSystem fs = FileSystems.newFileSystem(jar)) {
+			for (String n : MINECRAFT_CLASSES) {
+				if (Files.exists(fs.getPath(n))){
+					LOGGER.info("Found game: {}", jar);
+					foundMainClass = n.substring(0, n.length()-6).replace("/", ".");
+					version = new Gson().fromJson(Files.readString(fs.getPath("version.json")), JsonObject.class).get("id").getAsString();
+					return true;
+				}
+			}
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+		return false;
+	}
+
 	@Override
 	public void run() {
 		try {