[Node] Executes a shell command as Promise.

child_process_node.js

import * as child_process from 'child_process'

/**
 * Executes a shell command and return it as a Promise.
 */
export function exec(cmd: string): Promise<string> {
    return new Promise((resolve, reject) => {
        child_process.exec(cmd, (error, stdout, stderr) => {
            if (error) {
                reject({ error: error, stderr: stderr });
            }
            resolve(stdout);
        });
    });
}