[ruby/rake] deploy with foreman/deamonize (w/o capistrano)

gistfile1.rb

namespace :tlnt do

  desc "deploy to staging environment"
  task :deploy_staging => :environment do
    deploy_to_environment(:staging)
  end

  desc "restart staging environment"
  task :restart_staging => :environment do
    restart_environment(:staging)
  end

  desc "tail staging log"
  task :logtail_staging => :environment do
    ssh(:staging, "tail -f staging/log/staging.log")
  end

  desc "deploy to production environment"
  task :deploy_production => :environment do
    deploy_to_environment(:production)
  end

  desc "restart production environment"
  task :restart_production => :environment do
    restart_environment(:production)
  end

  desc "tail production log"
  task :logtail_production => :environment do
    ssh(:production, "tail -f production/log/production.log")
  end

private

  def deploy_to_environment(environment)    
    log "trying to clone git repository"
    ssh environment, "git clone #{AppConfig.git_url} #{environment}" rescue nil

    log "updating git repository"
    ssh environment, "cd #{environment} && git reset --hard"
    ssh environment, "cd #{environment} && git checkout #{ENV["BRANCH"]||:master}"
    ssh environment, "cd #{environment} && git pull origin #{ENV["BRANCH"]||:master}"
    ssh environment, "cd #{environment} && git reset --hard"

    log "installing bundle"
    bundle_cmd = "cd #{environment} && #{AppConfig.bundle_binary}"
    bundle_path = "#{basedir(environment)}.bundle/"
    ssh environment, "#{bundle_cmd} --path #{ENV['BUNDLE_PATH']||bundle_path} install"    

    kill_worker(environment)
    
    log "migrating database"
    ssh environment, "#{bundle_cmd} exec rake db:migrate RAILS_ENV=#{environment}"  
      
    start_worker(environment)
  end

  def restart_environment(environment)    
    kill_worker(environment)  
    start_worker(environment)     
  end

  def kill_worker(environment)
    log "killing worker"
    ssh environment, "cat #{basedir}#{environment}.pid | xargs kill -2" rescue nil  
  end

  def start_worker(environment)
    log "starting worker"
    foreman_proc = AppConfig.send(:"proc_#{environment}")
    ssh environment, app_cmd(environment, foreman_proc).join(" ")
  end

  def app_cmd(environment, foreman_procs="app=1")
    [
      "#{AppConfig.daemonize_binary} -v",
      "-c #{basedir(environment)}#{environment}",
      "-p #{basedir(environment)}#{environment}.pid",
      "-o #{basedir(environment)}#{environment}.out",
      "-e #{basedir(environment)}#{environment}.err",
      "#{AppConfig.bundle_binary} exec",
      "foreman start",
      "-p 2300",
      " --concurrency=\"#{foreman_procs}\"",
      "-e env/#{environment}"     
    ]
  end

  def ssh(environment, cmd)   
    sh "ssh #{AppConfig.send(:"ssh_#{environment}")} \"#{cmd}\""
  end

  def basedir(environment)
    basedir = "/home/talentsuche.crypto/"
  end

  def log(string)
    puts "deploy :: #{string}".green
  end

end