pur/lib/run.js

Alias and glob powered multi-threaded shell execution

"use strict";

exports.run = run;
exports.spawn = spawn;

var _child_process = require('child_process');

var child_process = _child_process;

/**
 * Run a shell command
 * @param  {string} cmd
 * @return {Promise<stdout, stderr>} Promise with standard output and error results
 */

function run(cmd) {
    return new Promise(function (res, rej) {
        child_process.exec(cmd, function (error, stdout, stderr) {
            if (error !== null) {
                rej(error);
            } else {
                res(stdout, stderr);
            }
        });
    });
}

/**
 * Spawn a subprocess
 * @param  {string} cmd
 * @param  {function(string)} stdoutCb
 * @param  {function(string)} stdinCb 
 * @param  {function(string)} stderrCb
 * @param  {string} cwd
 * @return {Process}
 */

function spawn(cmd, args, stdoutCb, stdinCb, stderrCb, cwd) {
    var originalCwd = process.cwd();
    process.chdir(cwd);

    var childProcess = child_process.spawn(cmd, args, {});
    childProcess.stdout.on('data', function (data) {
        return stdoutCb(String(data));
    });
    childProcess.stdin.on('data', function (data) {
        return stdinCb(String(data));
    });
    childProcess.stderr.on('data', function (data) {
        return stderrCb(String(data));
    });

    process.chdir(originalCwd);
}