Ersatz puppet module for dealing with node.js

init.pp

class nodejs {
    $packages = [ 'nodejs', 'nodejs-dev' ]

    package { $packages:
        ensure => present
    }

    exec { 'install_npm':
        command => '/usr/bin/curl http://npmjs.org/install.sh | sh',
        creates => '/usr/bin/npm'
    }
}

npm.pp

define nodejs::npm (
    $ensure = present
) {

    $grepper = "/usr/bin/npm ls | grep '${name}@'"

    if ( $ensure == 'absent' ) {
        exec { "npm_remove_${name}":
            command => "/usr/bin/npm remove ${name}",
            onlyif  => "${grepper}"
        }
    }

    if ( $ensure == 'update' ) {
        exec { "npm_update_${name}":
            command => "/usr/bin/npm update ${name}",
            onlyif  => "${grepper}"
        }
    }

    if ( $ensure == 'present' ) {
        exec { "npm_install_${name}":
            command => "/usr/bin/npm install ${name}",
            unless  => "${grepper}"
        }
    }
}