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loader.ts
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loader.ts
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/**
* Copyright (c) Microsoft Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const { app } = require('electron');
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]
for (const arg of chromiumSwitches) {
const match = arg.match(/--([^=]*)=?(.*)/)!;
app.commandLine.appendSwitch(match[1], match[2]);
}
// Defer ready event.
const originalWhenReady = app.whenReady();
const originalEmit = app.emit.bind(app);
let readyEventArgs: any[];
app.emit = (event: string | symbol, ...args: any[]): boolean => {
if (event === 'ready') {
readyEventArgs = args;
return app.listenerCount('ready') > 0;
}
return originalEmit(event, ...args);
};
app.getAppPath = () => path.dirname(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;
isReady = true;
whenReadyCallback(event);
originalEmit('ready', ...readyEventArgs);
};