start the game without the .exe

src/main/ipc.ts

@@ -5,6 +5,7 @@ import { Constants } from "./constants";
 import { CdnService } from "./cdnService";
 import { Updater } from "./updater";
 import { exec } from "child_process";
+import { Utils } from "./utils";
 
 export namespace IPC {
   export function registerEvents(mainWindow: BrowserWindow) {
@@ -45,9 +46,12 @@ export namespace IPC {
     });
 
     ipcMain.on("launchGame", (_event) => {
+      const javaArgs = Utils.buildJavaArgs(process.platform);
+      console.log(`Launching game with args: ${javaArgs}`);
+
       switch (process.platform) {
         case "win32":
-          exec("start DofusArena.exe", { cwd: Constants.GAME_PATH });
+          exec(`..\\jre\\bin\\java.exe ${javaArgs}`, { cwd: path.join(Constants.GAME_PATH, "game") });
           break;
       }
     });

src/main/updater.ts

@@ -114,11 +114,20 @@ export namespace Updater {
   }
 
   async function downloadAndSave(fileUrl: string, filePath: string) {
-    const fileBuf = await got.get(fileUrl).buffer();
-    if (!fs.existsSync(path.dirname(filePath))) {
-      fs.mkdirSync(path.dirname(filePath), { recursive: true });
+    try {
+      const fileBuf = await got.get(fileUrl).buffer();
+      if (!fs.existsSync(path.dirname(filePath))) {
+        fs.mkdirSync(path.dirname(filePath), { recursive: true });
+      }
+      fs.writeFileSync(filePath, fileBuf);
+    } catch (err) {
+      console.error(err);
+      dialog.showErrorBox(
+        "Une erreur est survenue",
+        "Erreur lors du téléchargement d'un fichier !\nVérifiez votre connexion internet et réessayez.\n\nSi le problème persiste, contactez nous sur Discord."
+      );
+      app.quit();
     }
-    fs.writeFileSync(filePath, fileBuf);
   }
 
   async function downloadFiles(files: Array<FileManifest>) {

src/main/utils.ts

@@ -0,0 +1,56 @@
+import { Constants } from "./constants";
+import path from "path";
+import fs from "fs";
+
+export namespace Utils {
+  export const buildJavaArgs = (platform: NodeJS.Platform) => {
+    const javaArgs: Array<string> = [];
+
+    // Library Path
+    switch (platform) {
+      case "win32":
+        javaArgs.push(`-Djava.library.path=..\\natives\\win32\\x86;..\\jre\\bin`);
+        break;
+    }
+
+    // Game related args
+    javaArgs.push("-client");
+
+    // JVM Args
+    javaArgs.push("-Xmx384M");
+    javaArgs.push("-Xms192M");
+    javaArgs.push("-Dsun.awt.noerasebackground=true");
+    javaArgs.push("-XX:MaxDirectMemorySize=92m");
+    javaArgs.push("-XX:+ForceTimeHighResolution");
+    javaArgs.push("-XX:MinHeapFreeRatio=10");
+    javaArgs.push("-XX:MaxHeapFreeRatio=20");
+    javaArgs.push("-Xss256k");
+
+    // Classpath
+    const classPath = [];
+    const libPath = path.join(Constants.GAME_PATH, "lib");
+    const libFiles = fs.readdirSync(libPath);
+    switch (platform) {
+      case "win32":
+        classPath.push("core.jar");
+        libFiles.forEach((file) => {
+          classPath.push(`..\\lib\\${file}`);
+        });
+        javaArgs.push(`-Djava.class.path=${classPath.join(";")}`);
+        break;
+    }
+
+    // Main class
+    javaArgs.push("com.ankamagames.dofusarena.client.DofusArenaClient");
+
+    // Logs path
+    switch (platform) {
+      case "win32":
+        javaArgs.push("error.log");
+        javaArgs.push("output.log");
+        break;
+    }
+
+    return javaArgs.join(" ");
+  };
+}

tsconfig.json

@@ -9,6 +9,7 @@
     "baseUrl": ".",
     "outDir": "dist",
     "jsx": "react-jsx",
+    "target": "es2021",
     "moduleResolution": "node",
     "resolveJsonModule": true,
     "paths": {