Example Dreadnot stack with Rails 3.2 and Heroku

example_stack.js

var async = require('async')

var git = require('util/git')
var misc = require('util/misc')

exports.get_deployedRevision = function(args, callback) {
  git.revParse(this.config.program_creator_dir, 'HEAD', function(err, stdout) {
    callback(null, stdout.replace(/^\s+|\s+$/g, ''))
  })
}

exports.task_preDeploy = function(stack, baton, args, callback) {
  var env = process.env
  env['RAILS_ENV'] = stack.config.env
  var opts = { cwd: stack.config.program_creator_dir, env: env }

  async.series([
    function pullFromGithub(callback) {
      misc.taskSpawn(baton, args, ['git', 'pull'], opts, callback)
    },
    function bundleInstall(callback) {
      misc.taskSpawn(baton, args, ['bundle', 'install'], opts, callback)
    },
    function dbDrop(callback) {
      misc.taskSpawn(baton, args, ['bundle', 'exec', 'rake', 'db:drop'], opts, callback)
    },
    function dbMigrate(callback) {
      misc.taskSpawn(baton, args, ['bundle', 'exec', 'rake', 'db:migrate'], opts, callback)
    },
    function dbSeed(callback) {
      misc.taskSpawn(baton, args, ['bundle', 'exec', 'rake', 'db:seed'], opts, callback)
    },
    function compileAssets(callback) {
      misc.taskSpawn(baton, args, ['bundle', 'exec', 'rake', 'assets:precompile'], opts, callback)
    }
  ], callback)
}

exports.task_deploy = function(stack, baton, args, callback) {
  var opts = { cwd: stack.config.program_creator_dir, env: process.env }

  async.series([
    function pushToHeroku(callback) {
      misc.taskSpawn(baton, args, ['git', 'push', 'heroku', 'master'], opts, callback)
    }
  ], callback)
}

exports.targets = {
  'deploy' : [
    'task_preDeploy'
    , 'task_deploy'
  ]
}