Heroku deploy script

deploy.rake

# lib/tasks/deploy.rake

namespace :deploy do
  desc 'Deploy to production'
  task(:production) { deploy }

  desc 'Deploy to staging'
  task(:staging) { deploy :staging }

  private

  def deploy(environment = :production)
    announce "Deploying to #{red environment}..."

    force_push = ask "Do you want to force push? (y/n) "

    announce "Deploying branch #{red current_git_branch}"

    if force_push == 'y'
     sh "git push -f #{remote_git_url environment} #{current_git_branch}:master"
    elsif force_push == 'n'
     sh "git push #{remote_git_url environment} #{current_git_branch}:master"
    else
     announce 'No touching!'
     exit
    end
    
    sh "heroku run rake db:migrate --app #{heroku_app environment}"
  
    announce 'Ladies and gentlemen, we have successfully deployed to Heroku!'
  end

  def ask(message)
    print message
    STDIN.gets.chomp
  end

  def announce(message)
    puts "\n#{message}\n\n"
  end

  def red(str)
    "\e[31m#{str}\e[0m"
  end

  def current_git_branch
    `git symbolic-ref HEAD 2> /dev/null`.strip.gsub(/^refs\/heads\//, '')
  end

  def remote_git_url(environment = :production)
    case environment
    when :production
      '[email protected]:production.git'
    when :staging
      '[email protected]:staging.git'
    else
      announce "Error: unknown remote environment '#{environment}'. Edit method remote_git_url in lib/tasks/deploy.rake"
      exit
    end
  end

  def heroku_app(environment = :production)
    remote_git_url(environment).match(/[email protected]:([^\.]+)\.git/)[1]
  end
end

task :deploy => 'deploy:staging'