node-cmd

by RIAEvangelist

RIAEvangelist / node-cmd

Simple commandline interface to allow you to run cli or bash style commands as if you were in the te...

220 Stars 28 Forks Last release: over 3 years ago (3.0.0) Other 38 Commits 5 Releases

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node-cmd

Node.js commandline/terminal interface.

Simple commandline or terminal interface to allow you to run cli or bash style commands as if you were in the terminal.

Run commands asynchronously, and if needed can get the output as a string.

NPM Stats

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RIAEvangelist

GitHub info :
node-cmd GitHub Release GitHub license node-cmd license open issues for node-cmd on GitHub

Package details websites : * GitHub.io site. A prettier version of this site. * NPM Module. The npm page for the node-cmd module.

This work is licenced via the DBAD Public Licence.

Methods

|method | arguments | functionality | |-------|-----------|---------------| |run | command | runs a command asynchronously| |get | command,callback | runs a command asynchronously, when the command is complete all of the stdout will be passed to the callback|

Examples

    var cmd=require('node-cmd');

cmd.get(
    'pwd',
    function(err, data, stderr){
        console.log('the current working dir is : ',data)
    }
);

cmd.run('touch example.created.file');

cmd.get(
    'ls',
    function(err, data, stderr){
        console.log('the current dir contains these files :\n\n',data)
    }
);

cmd.get(
    `
        git clone https://github.com/RIAEvangelist/node-cmd.git
        cd node-cmd
        ls
    `,
    function(err, data, stderr){
        if (!err) {
           console.log('the node-cmd cloned dir contains these files :\n\n',data)
        } else {
           console.log('error', err)
        }

    }
);

With promises

this example by @stephen-last

import Promise from 'bluebird'
import cmd from 'node-cmd'

const getAsync = Promise.promisify(cmd.get, { multiArgs: true, context: cmd })

getAsync('node -v').then(data => { console.log('cmd data', data) }).catch(err => { console.log('cmd err', err) })

Accessing the CMD Process

If you need PIDs, stdio,stdin, stdout, stderr, etc. access, for use in your code, or cleaning up, @freemany added in some functionality to get a reference to the child process as the returned value of the

get
and
run
calls.

Getting Process ID

    var cmd=require('../cmd.js');

var process=cmd.get('node');
console.log(process.pid);

Running a python shell from node

const cmd=require('../cmd.js');

const processRef=cmd.get('python -i'); let data_line = '';

//listen to the python terminal output processRef.stdout.on( 'data', function(data) { data_line += data; if (data_line[data_line.length-1] == '\n') { console.log(data_line); } } );

const pythonTerminalInput=`primes = [2, 3, 5, 7] for prime in primes: print(prime)

`;

//show what we are doing console.log(>>>${pythonTerminalInput});

//send it to the open python terminal processRef.stdin.write(pythonTerminalInput);

Output :

>>>primes = [2, 3, 5, 7]
for prime in primes:
    print(prime)


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