Rakefile to deploy to @Scalingo with support for multiple remotes (staging, production, etc). Suggestions & Improvements are welcomed.

deploy.rake

# Deploy to scalingo
# example : rake deploy REMOTE=staging
# last version available here : https://gist.github.com/dlupu/cdd6e1507c8cc3c7c617

namespace :deploy do

  task :detect_app do

    SCALINGO_REPOSITORY_REGEXP = /\Agit@scalingo.com:(?<app_name>.*)\.git\z/
    remote_name = ENV['REMOTE']

    if remote_name.nil?
      puts 'REMOTE environment variable is missing, assuming REMOTE is `scalingo`.'
      puts "HINT : next time add REMOTE=<remote name> to your command in order to avoid seeing this message"
      remote_name = 'scalingo'
    end

    if `git remote`.split("\n").include? remote_name
      APP_GIT_REPO = `git config --get remote.#{remote_name}.url `.gsub!("\n", '')

      match = SCALINGO_REPOSITORY_REGEXP.match(APP_GIT_REPO)

      unless match && (APP_NAME = match['app_name'])
        puts "Error: '#{APP_GIT_REPO}' is not a Scalingo remote. Please choose another remote among the project's git remotes :"
        puts `git remote -v  2>&1 `
        next
      end
    else
      puts "ERROR : Could not find any remote named '#{remote_name}' among the project's git remotes :"
      puts `git remote -v 2>&1 `
      next
    end
  end

  task :push do
    puts 'Deploying site to Scalingo ...'
    puts `git push -f #{APP_GIT_REPO} master 2>&1 `
  end

  task :restart do
    puts 'Restarting app servers ...'
    puts `scalingo restart --app #{APP_NAME} 2>&1 `
  end

  task :migrate  do
    puts 'Running database migrations ...'
    puts `scalingo  --app #{APP_NAME} run bundle exec rake db:migrate 2>&1`
  end

  task :off do
    # maintainance mode not supported yet
    puts 'Stopping (aka. scale to 0) the application  ...'
    puts `scalingo --app #{APP_NAME} scale web:1 2>&1 `
  end

  task :on do
    # maintainance mode not supported yet
    puts 'Starting (aka. scale to 1) tbe application ...'
    puts `scalingo --app #{APP_NAME} scale web:1 2>&1`
  end
end

task :deploy => ['deploy:detect_app', 'deploy:push', 'deploy:migrate', 'deploy:restart']