Fabric deployment of Node.js on Ubuntu

fabfile.py

from __future__ import with_statement
from fabric.api import env
from fabric.api import *

from fabric.contrib.console import confirm
from fabric.contrib.project import upload_project
import ubuntu
import protobuf



def staging():
    env.hosts = ['10.100.0.70',]
    env.remote_admin = 'sysadmin'
 
 
def ssh():
  for host in env.hosts:
        local("ssh-copy-id %s@%s" % (env.remote_admin, host))


def hostconfig():
    ubuntu.apt_upgrade()
    ubuntu.install_git()
    ubuntu.install_mongodb()
    ubuntu.install_nodejs()


def install_protobuf():
    protobuf.install_protobuf()
    protobuf.install_protobuf_node()


def testapp():
    install_protobuf()
    with cd('~/projects'):
        upload_project('./receiver', '/home/sysadmin/projects')
    ubuntu.upstart("receiver", "app.js", 
        user=env.remote_admin
        , home="/home/%s" % env.remote_admin
        ,location_dir='/home/sysadmin/projects/receiver/')

    sudo("stop receiver")
    sudo("start receiver")

protobuf.py

from fabric.api import *
from fabric.contrib import files
import ubuntu


def install_protobuf():
  if not ubuntu.cmd_exists('protoc'):
    version="2.4.1"
    folder="protobuf-%s" % version
    filename="%s.tar.bz2" % folder
    source="http://protobuf.googlecode.com/files/%s" & filename
    with cd('/tmp'):
      run("wget %s" % source)
      run("tar -jxf %s" % filename)
    with cd('/tmp/%s' % folder):
      run("./configure --prefix=/usr")
      run("make")
      sudo("make install")

    with cd('/tmp/'):
      run("rm -Rf %s*" % folder)


def install_protobuf_node():
  if not files.exists(".node_libraries/protobuf_for_node.node"):
    if not ubuntu.cmd_exists('hg'):
      ubuntu.apt_install('mercurial')

    source="hg clone https://code.google.com/p/protobuf-for-node/"

    with cd('/tmp'):
      run(source)
    with cd('/tmp/protobuf-for-node'):
      run("PROTOBUF=/usr node-waf configure clean build")
      run("node-waf install")

    with cd('/tmp'):
      run("rm -Rf protobuf-for-node")

ubuntu.py

from fabric.api import *
from fabric.contrib import files

SOURCES_D="/etc/apt/sources.list.d"

__all__= ['cmd_exists', 'apt', 'apt_upgrade']

def cmd_exists(cmd):
  #TODO: some sort of run test of the command perhaps
  return files.exists("/usr/bin/%s" % cmd)

def apt(cmdline):
  if not cmd_exists('aptitude'):
        sudo("apt-get -y install aptitude")
  sudo("aptitude %s" % cmdline)


def apt_install(packages):
    apt("-y install %s" % packages)

def apt_update():
    apt("update")

def apt_upgrade():
    apt_update()
    apt("-y safe-upgrade")


def install_git():
  if not cmd_exists('git'):
      apt_install("build-essential git git-core")
      run("git config --global color.ui true")


def install_mongodb():
  with cd(SOURCES_D):
      if not files.exists('mongodb.list'):
          sudo('echo "deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen">mongodb.list')            
          sudo("sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10")
          apt_update()
          apt_install("mongodb-10gen")


def install_nodejs():
  listfile='chris-lea-node_js-natty.list'
  with cd(SOURCES_D):
      if not files.exists(listfile):
          files.append(listfile, "deb http://ppa.launchpad.net/chris-lea/node.js/ubuntu natty main", use_sudo=True)
          sudo("sudo apt-key adv --keyserver keyserver.ubuntu.com --recv C7917B12")
          apt_update()
  
  if not cmd_exists('node'):
      apt_install("nodejs nodejs-dev")

  #npm 
  if not cmd_exists('curl'):
      apt_install("curl")

  if not cmd_exists('npm'):
      sudo("curl http://npmjs.org/install.sh | sh")



def upstart(appname, script, force=False, location_dir="/tmp", home="/root", user="root", description="Node.js server App"):
  dst="/etc/init/%s.conf" % appname
  logfile="/var/log/%s.log" % appname
  context = {'appname':appname
        , 'script':script
        , 'logfile':logfile
        , 'location_dir':location_dir
        , 'home':home
        , 'user':user
        , 'description':description}
  if not files.exists(dst) or force:
    files.upload_template('upstart.template'
      , dst
      , use_sudo=True
      , context=context)
    sudo("chown root:root %s" % dst)
    sudo("touch %s" % logfile)
    sudo("chown %(user)s:%(user)s %(logfile)s" % context)