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execute some code and then go into interactive node

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How do you execute terminal commands in node?

Node. js can run shell commands by using the standard child_process module. If we use the exec() function, our command will run and its output will be available to us in a callback. If we use the spawn() module, its output will be available via event listeners.

Is an interactive shell that processes node?

The Node. js Read-Eval-Print-Loop (REPL) is an interactive shell that processes Node. js expressions. The shell reads JavaScript code the user enters, evaluates the result of interpreting the line of code, prints the result to the user, and loops until the user signals to quit.


Really old question but...

I was looking for something similar, I believe, and found out this. You can open the REPL (typing node on your terminal) and then load a file. Like this: .load ./script.js. Press enter and the file content will be executed. Now everything created (object, variable, function) in your script will be available.

For example:

// script.js
var y = {
    name: 'obj',
    status: true
};

var x = setInterval(function () {
    console.log('As time goes by...');
}, 5000);

On the REPL:

//REPL
.load ./script.js

Now you type on the REPL and interact with the "living code". You can console.log(y) or clearInterval(x);

It will be a bit odd, cause "As time goes by..." keep showing up every five seconds (or so). But it will work!


You can start a new repl in your Node software pretty easily:

var repl = require("repl");
var r = repl.start("node> ");
r.context.pause = pauseHTTP;
r.context.resume = resumeHTTP;

From within the REPL you can then call pause() or resume() and execute the functions pauseHTTP() and resumeHTTP() directly. Just assign whatever you want to expose to the REPL's context member.


This can be achieved with the current version of NodeJS (5.9.1):

$ node -i -e "console.log('A message')"

The -e flag evaluates the string and the -i flag begins the interactive mode.

You can read more in the referenced pull request


node -r allows you to require a module when REPL starts up. NODE_PATH sets the module search path. So you can run something like this on your command line:

NODE_PATH=. node -r myscript.js

This should put you in a REPL with your script loaded.


I've recently started a project to create an advanced interactive shell for Node and associated languages like CoffeeScript. One of the features is loading a file or string in the context of the interpreter at startup which takes into account the loaded language.

http://danielgtaylor.github.com/nesh/

Examples:

# Load a string (Javascript)
nesh -e 'var hello = function (name) { return "Hello, " + name; };'

# Load a string (CoffeeScript)
nesh -c -e 'hello = (name) -> "Hello, #{name}"'

# Load a file (Javascript)
nesh -e hello.js

# Load a file (CoffeeScript)
nesh -c -e hello.coffee

Then in the interpreter you can access the hello function.