@sern/cli/src/utilities/npm.ts

Official CLI for @sern/handler

import { execa } from 'execa';

/**
 * It checks if you have npm or yarn installed, and returns a string based on the result
 * @returns A promise that resolves to a string.
 */
export async function npm() {
    const npm = await execa('npm', ['-v']).catch(() => null);
    const npm_version = npm?.stdout;

    const yarn = await execa('yarn', ['-v']).catch(() => null);
    const yarn_version = yarn?.stdout;

    if (npm_version && !yarn_version) {
        return 'npm';
    }

    if (!npm_version && yarn_version) {
        return 'yarn';
    }

    if (npm_version && yarn_version) {
        return 'both';
    }
}