Creating Child Process With Exec

exec.js

/*
  - Node.js comes with a Child Process module which allows you to execute external processes in your environment. 
  - In other words, your Node.js app can run and communicate with other applications on the computer that it is hosting
  - Two main functions used to create Child Processes: spawn and execute
  - 
*/
//The Child Process module contains the execute function
var exec = require("child_process").exec;

//exec('open http'://www.google.com');
/*
   Every time we've been executing any of these processes any data
   that gets returned by the process would be returned to the second 
   argument in the execute function, a call back function.
   So in this call back function after we execute ls and we receive information
   back from ls it will be injected into this function via argument.
   
   So first, if there are any errors when executing a directory listing 
   we pass those as the first argument.
   The next argument is the stdout, or standard output,
   that we've received from executing the ls
*/
//exec('ls', function(err, stdout) { if (err) { throw err; } console.log("ls finished"); console.log(stdout);});


exec("git version", function(err, stdout) {

	if (err) {
		throw err;
	}

	console.log("Git Version Executed");

	console.log(stdout);

});