Spawn binary from AWS Lambda

example.js

const spawn = require('./node_modules/child-process-promise/lib').spawn;

process.env["PATH"] = process.env["PATH"] + ":" +
                      process.env["LAMBDA_TASK_ROOT"];

function spawnCmd(cmd, args, opts) {
  var opts = opts||{};
  console.log("[spawn]", cmd, args.join(' '), opts);

  let cmd_promise = spawn(cmd, args, opts);
  let child = cmd_promise.childProcess;

  child.stdout.on('data', function(chunk) {
    console.log("[" + cmd + ":stdout] " + chunk);
  });

  child.stderr.on('data', function(chunk) {
    console.log("[" + cmd + ":stderr] " + chunk);
  });

  return cmd_promise;
}

exports.lambda_handler = function(event, context) {
  spawnCmd("uname", ["-a"], {
    cwd: '/tmp'
  }).then(function(result) {
    context.succeed(result);
  }, function(err) {
    context.fail(err);
  });
};