const spawnify = require('spawnify');
const spawn = spawnify('ls -lha', {cwd: __dirname});

spawn.on('error', (error) => {
    console.error(error.message);
});

/* not mandatory */
spawn.on('data', (data) => {
    console.log(data);
});

/* not mandatory */
spawn.on('start', () => {
    console.log('process has been started');
    // kill process after start
    spawn.kill();
});

/* not mandatory */
spawn.on('path', (path) => {
    console.log('directory was changed', path);
});

/* not mandatory */
spawn.on('close', () => {
    console.log('process closed');
});

/* not mandatory */
spawn.on('exit', () => {
    console.log('process closed');
});