running command-line module methods in node.js

Question

I'm trying to run a component.io method from inside a script, though this shouldn't be specific to component.io.

Under normal circumstances, in a terminal, I'd write. component install to install all the dependencies.

I've tried to different methods, but can't seem to get either to work (or show any output).

First I tried including component as a module

var componentIO = require('component');
componentIO.install();

Unfortunately, when I do this, nothing happens.

When I output console.log(componentIO), it outputs as part of the object install: [function], so I think I'm calling it correctly.

The other way I tried was via child_process

var cp = require('child_process');
var componentIO = cp.fork('component');
componentIO.send('install');

but again, I don't see any output in the terminal.

Am I taking the wrong tact to run commands from within node?

bnuhero · Accepted Answer · 2014-02-14 07:29:49Z

1

You can use component-installer module to install components.

var Installer  = require('component-installer');
var installer = new Installer(__dirname);

installer.on('package', function (pkg) {
  console.log('installing', pkg.name, pkg.version);
});

// arguments: (package name, package version)
installer.installPackage('matthewmueller/io', 'master');

console.log('Packaged installed.');

answered Feb 14, 2014 at 7:29

bnuhero

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2 Comments

pedalpete Over a year ago

Though this may be the correct answer with regards to component.io, I am actually trying to get something that works more generally.

bnuhero Over a year ago

@pedalpete The general way is to pass the full path of component to cp.fork(). You can run which component in the terminal to get the full path.

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