feat: allow to specify custom game args

src/core/arguments.ts

@@ -93,10 +93,11 @@ export async function generateLaunchArguments(
   gameRoot: string,
   versionJar: string,
   auth: Auth,
-  options = {
-    minRam: "2G",
-    maxRam: "2G",
-    customJvm: "",
+  options: {
+    minRam?: string;
+    maxRam?: string;
+    customJvmArgs?: string;
+    customGameArgs?: string;
   },
 ) {
   // Log4j /!\
@@ -122,20 +123,26 @@ export async function generateLaunchArguments(
     p(game, arg);
   }
 
-  if (options.customJvm !== "") {
-    for (const arg of options.customJvm.split(" ")) {
+  if (options.customJvmArgs !== "") {
+    for (const arg of options.customJvmArgs.split(" ")) {
       jvm.push(arg);
     }
   }
 
+  if (options.customGameArgs !== "") {
+    for (const arg of options.customGameArgs.split(" ")) {
+      game.push(arg);
+    }
+  }
+
   const log4j = await getArgument(versionManifest, gameRoot);
 
   return {
     command: getJavaExecutable(javaRoot),
     args: [
       ...jvm,
-      `-Xms${options.minRam}`,
-      `-Xmx${options.maxRam}`,
+      `-Xms${options.minRam || "2G"}`,
+      `-Xmx${options.maxRam || "2G"}`,
       "-XX:+UnlockExperimentalVMOptions",
       "-XX:+UseG1GC",
       "-XX:G1NewSizePercent=20",

src/instance/instance.ts

@@ -41,9 +41,13 @@ export class Instance {
   modLoader: { name: string; version: string };
   auth: Auth;
   paths: Paths;
-
+  args: { java: string; game: string };
   versionManifest: Version;
 
+  constructor() {
+    this.args = { java: "", game: "" };
+  }
+
   setVersion(version: string) {
     this.version = version;
   }
@@ -80,6 +84,11 @@ export class Instance {
     this.auth = auth;
   }
 
+  setArgs({ java, game }: { java?: string; game?: string }) {
+    this.args.java = java || "";
+    this.args.game = game || "";
+  }
+
   async install() {
     this.versionManifest = await core.version.getVersionManifest(
       this.version,
@@ -140,6 +149,7 @@ export class Instance {
       path.join(this.paths.root),
       path.join(this.paths.root, `${this.version}.jar`),
       this.auth,
+      { customGameArgs: this.args.game, customJvmArgs: this.args.java },
     );
 
     const process = core.launch(args, this.paths.root);