84 lines
2.4 KiB
TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { execSync } from 'child_process';
import { existsSync } from 'fs';
import { join } from 'path';
import { PackageManager } from '../lib/config/schema';
import { getConfiguredPackageManager } from './config';
function supports(name: string): boolean {
try {
execSync(`${name} --version`, { stdio: 'ignore' });
return true;
} catch {
return false;
}
}
export function supportsYarn(): boolean {
return supports('yarn');
}
export function supportsNpm(): boolean {
return supports('npm');
}
export async function getPackageManager(root: string): Promise<PackageManager> {
let packageManager = await getConfiguredPackageManager() as PackageManager | null;
if (packageManager) {
return packageManager;
}
const hasYarn = supportsYarn();
const hasYarnLock = existsSync(join(root, 'yarn.lock'));
const hasNpm = supportsNpm();
const hasNpmLock = existsSync(join(root, 'package-lock.json'));
if (hasYarn && hasYarnLock && !hasNpmLock) {
packageManager = PackageManager.Yarn;
} else if (hasNpm && hasNpmLock && !hasYarnLock) {
packageManager = PackageManager.Npm;
} else if (hasYarn && !hasNpm) {
packageManager = PackageManager.Yarn;
} else if (hasNpm && !hasYarn) {
packageManager = PackageManager.Npm;
}
// TODO: This should eventually inform the user of ambiguous package manager usage.
// Potentially with a prompt to choose and optionally set as the default.
return packageManager || PackageManager.Npm;
}
/**
* Checks if the npm version is version 6.x. If not, display a message and exit.
*/
export async function ensureCompatibleNpm(root: string): Promise<void> {
if ((await getPackageManager(root)) !== PackageManager.Npm) {
return;
}
try {
const version = execSync('npm --version', {encoding: 'utf8', stdio: 'pipe'}).trim();
const major = Number(version.match(/^(\d+)\./)?.[1]);
if (major === 6) {
return;
}
// tslint:disable-next-line: no-console
console.error(
`npm version ${version} detected.\n` +
'The Angular CLI currently requires npm version 6.\n\n' +
'Please install a compatible version to proceed (`npm install --global npm@6`).\n',
);
process.exit(3);
} catch {
// npm is not installed
}
}