feat: Add Minecraft process kill handling

package.json

@@ -12,8 +12,10 @@
     "scripts": {
         "dev": "rimraf ./build && tsc -w",
         "build": "rimraf ./build && tsc",
-        "prepublishOnly": "npm i && npm run build"
+        "prepublishOnly": "pnpm i && pnpm run build",
+        "prepare": "pnpm run build"
     },
+    "packageManager": "pnpm@10.17.0",
     "engines": {
         "node": ">=18.0.0"
     },

src/Launch.ts

@@ -200,7 +200,7 @@ export type LaunchOPTS = {
 
 export default class Launch extends EventEmitter {
 	options: LaunchOPTS;
-
+	pid: number | null = null;
 	async Launch(opt: LaunchOPTS) {
 		const defaultOptions: LaunchOPTS = {
 			url: null,
@@ -302,6 +302,7 @@ export default class Launch extends EventEmitter {
 		this.emit('data', `Launching with arguments ${argumentsLogs}`);
 
 		let minecraftDebug = spawn(java, Arguments, { cwd: logs, detached: this.options.detached })
+		this.pid = minecraftDebug.pid;
 		minecraftDebug.stdout.on('data', (data) => this.emit('data', data.toString('utf-8')))
 		minecraftDebug.stderr.on('data', (data) => this.emit('data', data.toString('utf-8')))
 		minecraftDebug.on('close', (code) => this.emit('close', 'Minecraft closed'))
@@ -401,4 +402,33 @@ export default class Launch extends EventEmitter {
 			minecraftJava: gameJava
 		}
 	}
+
+	kill() {
+		if (!this.pid) {
+			this.emit('error', { error: 'No Minecraft process to kill' });
+			return;
+		}
+
+		try {
+			if (process.platform === 'win32') {
+				// On Windows, just kill the process
+				process.kill(this.pid, 'SIGTERM'); // use SIGTERM instead of default for safer termination
+			} else {
+				// On Unix-like systems, kill the process group
+				// Ensure the PID is negative to target the process group
+				process.kill(-this.pid, 'SIGTERM');
+			}
+			this.emit('data', 'Minecraft process killed');
+		} catch (e: any) {
+			if (e.code === 'ESRCH') {
+				// Process does not exist
+				this.emit('data', 'Minecraft process already exited');
+			} else if (e.code === 'EPERM') {
+				// Permission error
+				this.emit('error', { error: 'Permission denied when killing process', details: e });
+			} else {
+				this.emit('error', { error: 'Failed to kill Minecraft process', details: e });
+			}
+		}
+	}
 }