chore(electron): move loader to be preload (#19650)

Fixes https://github.com/microsoft/playwright/issues/19648

packages/playwright-core/src/client/electron.ts

@@ -108,7 +108,7 @@ export class ElectronApplication extends ChannelOwner<channels.ElectronApplicati
   async close() {
     if (this._isClosed)
       return;
-    await this._channel.close();
+    await this._channel.close().catch(() => {});
   }
 
   async waitForEvent(event: string, optionsOrPredicate: WaitForEventOptions = {}): Promise<any> {

packages/playwright-core/src/server/electron/electron.ts

@@ -130,7 +130,7 @@ export class Electron extends SdkObject {
     controller.setLogName('browser');
     return controller.run(async progress => {
       let app: ElectronApplication | undefined = undefined;
-      const electronArguments = [require.resolve('./loader'), '--inspect=0', '--remote-debugging-port=0', options.cwd || process.cwd(), ...args];
+      const electronArguments = ['-r', require.resolve('./loader'), '--inspect=0', '--remote-debugging-port=0', ...args];
 
       if (os.platform() === 'linux') {
         const runningAsRoot = process.geteuid && process.geteuid() === 0;

packages/playwright-core/src/server/electron/loader.ts

@@ -15,17 +15,11 @@
  */
 
 const { app } = require('electron');
-const fs = require('fs');
-const path = require('path');
 const { chromiumSwitches } = require('../chromium/chromiumSwitches');
 
-// Command line is like:
-// [Electron, loader.js, --inspect=0, --remote-debugging-port=0, options.cwd, app.js, ...args]
-const appPath = path.resolve(process.argv[4], process.argv[5]);
-process.argv.splice(2, 4);
-process.argv[1] = appPath;
-// Now it is like
-// [Electron, app.js, ...args]
+// [Electron, -r, loader.js, --inspect=0, --remote-debugging-port=0, ...args]
+process.argv.splice(1, 4);
+
 
 for (const arg of chromiumSwitches) {
   const match = arg.match(/--([^=]*)=?(.*)/)!;
@@ -44,20 +38,12 @@ app.emit = (event: string | symbol, ...args: any[]): boolean => {
   return originalEmit(event, ...args);
 };
 
-app.getAppPath = () => {
-  if (fs.statSync(appPath).isFile())
-    return path.dirname(appPath);
-  return appPath;
-};
-
 let isReady = false;
 let whenReadyCallback: (event: any) => any;
 const whenReadyPromise = new Promise<void>(f => whenReadyCallback = f);
 app.isReady = () => isReady;
 app.whenReady = () => whenReadyPromise;
 
-require(appPath);
-
 (globalThis as any).__playwright_run = async () => {
   // Wait for app to be ready to avoid browser initialization races.
   const event = await originalWhenReady;

tests/electron/electron-app.spec.ts

@@ -197,12 +197,25 @@ test('should detach debugger on app-initiated exit', async ({ launchElectronApp
 });
 
 test('should run pre-ready apis', async ({ launchElectronApp }) => {
-  await launchElectronApp('electron-pre-ready-app.js');
+  await launchElectronApp('electron-app-pre-ready.js');
 });
 
 test('should resolve app path for folder apps', async ({ launchElectronApp }) => {
   const electronApp = await launchElectronApp('.');
   const appPath = await electronApp.evaluate(async ({ app }) => app.getAppPath());
   expect(appPath).toBe(path.resolve(__dirname));
-  await electronApp.close();
+});
+
+test('should return app name / version from manifest', async ({ launchElectronApp }) => {
+  const electronApp = await launchElectronApp('.');
+  const data = await electronApp.evaluate(async ({ app }) => {
+    return {
+      name: app.getName(),
+      version: app.getVersion(),
+    };
+  });
+  expect(data).toEqual({
+    name: 'my-electron-app',
+    version: '1.0.0'
+  });
 });

tests/electron/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "my-electron-app",
+  "version": "1.0.0",
+  "description": "Hello World!",
+  "main": "main.js",
+  "author": "Jane Doe",
+  "license": "MIT"
+}