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5b8e2d5e57
Vite appears to consider a port value of `0` as a falsy value and use the default Vite port of `5173` when zero is used as a value for the development server port option. To workaround this issue, the port checker code now explicitly handles the zero value case and determines a random port as would be done automatically by the Webpack-based development server.
71 lines
2.0 KiB
TypeScript
71 lines
2.0 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import assert from 'node:assert';
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import { AddressInfo, createServer } from 'node:net';
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import { loadEsmModule } from './load-esm';
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import { isTTY } from './tty';
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function createInUseError(port: number): Error {
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return new Error(`Port ${port} is already in use. Use '--port' to specify a different port.`);
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}
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export async function checkPort(port: number, host: string): Promise<number> {
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// Disabled due to Vite not handling port 0 and instead always using the default value (5173)
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// TODO: Enable this again once Vite is fixed
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// if (port === 0) {
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// return 0;
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// }
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return new Promise<number>((resolve, reject) => {
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const server = createServer();
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server
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.once('error', (err: NodeJS.ErrnoException) => {
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if (err.code !== 'EADDRINUSE') {
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reject(err);
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return;
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}
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if (!isTTY) {
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reject(createInUseError(port));
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return;
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}
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loadEsmModule<typeof import('inquirer')>('inquirer')
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.then(({ default: { prompt } }) =>
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prompt({
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type: 'confirm',
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name: 'useDifferent',
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message: `Port ${port} is already in use.\nWould you like to use a different port?`,
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default: true,
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}),
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)
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.then(
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(answers) =>
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answers.useDifferent ? resolve(checkPort(0, host)) : reject(createInUseError(port)),
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() => reject(createInUseError(port)),
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);
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})
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.once('listening', () => {
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// Get the actual address from the listening server instance
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const address = server.address();
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assert(
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address && typeof address !== 'string',
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'Port check server address should always be an object.',
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);
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server.close();
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resolve(address.port);
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})
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.listen(port, host);
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});
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}
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