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code-pump Build Status

Live develop your nodejs app and inspect its state, from a nodejs-workspace in Lively Web!

nodejs code injection, extraction, and evaluation. Can evaluate in the context of modules by using lively.vm.

Also supports nodejs process creation for "workspace processes". Controlled either directly via the evaluator / process interfaces or via websockets. Ws server is part of the package.


Option 1: start code-pump from the command line

  1. npm install code-pump --save-dev
  2. PATH=$(npm bin):$PATH code-pump localhost:9004
  3. In Lively, open a nodejs-workspace, click on the red "disconnected" button, and enter ws://localhost:9004

Option 2: start code-pump with your nodejs app

require("code-pump").start("localhost", 9004, err =>
  console.log(err ? "Code pump error:" + err : "code-pump started!"););

Then connect as in 3. above.



Given a file some-module.js in the base directory of your app that includes

  var internalState = {of: {module: 23}};

you can access it via

var e = require("code-pump").evaluator;
e.evalIn("./some-module", "internalState.of.module"); // => 23 

child process

var p = require("code-pump").process;
p.startNodejsWorkspace({}, (err, procMgr) => {
  procMgr.sendToChild("eval", {code: "1+2"}, (err, answer) {
    console.log(; // => 3 


If you want your own client then setup a server like above

require("code-pump").start("localhost", 9004, err =>
  console.log(err ? "Code pump error:" + err : "code-pump started!"););

In your client (nodejs or browser) run

var ws = new WebSocketClient("ws://localhost:9004/");
  action: "eval",
  data: {module: "./some-module", code: '3 + 4 + internalState.of.module'}
ws.onmessage(function(e) {
  JSON.parse(; // => 30