Module: CapistranoUnicornMethods

Defined in:
lib/capistrano-unicorn-methods.rb

Class Method Summary collapse

Class Method Details

.load ⇒ Object 



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# File 'lib/capistrano-unicorn-methods.rb', line 4

def self.load
  Capistrano::Configuration.instance(true).load do
    namespace :unicorn do

      # Lazy setting these variables, as they (might) depend on other settings
      set(:unicorn_pid)     { "#{current_path}/tmp/pids/unicorn.pid" }
      set(:unicorn_old_pid) { "#{current_path}/tmp/pids/unicorn.pid.oldbin" }
      set(:unicorn_config)  { "#{current_path}/config/unicorn.rb" }
      set(:unicorn_port)    { 3000 }
      set(:use_bundler)     { true }
      set(:rails_env)       { "production" }

      desc "Zero-downtime restart of Unicorn"
      task :restart do
        unicorn.cleanup
        run "touch #{unicorn_pid}"
        pid = capture("cat #{unicorn_pid}").to_i
        run "kill -s USR2 #{pid}" if pid > 0
      end

      desc "Starts unicorn"
      task :start do
        unicorn.cleanup
        run "cd #{current_path} ; #{'bundle exec' if use_bundler} unicorn_rails -c #{unicorn_config} -D -p #{unicorn_port} -E #{rails_env}"
      end

      desc "Stop unicorn"
      task :stop do
        run "touch #{unicorn_pid}"
        pid = capture("cat #{unicorn_pid}").to_i
        run "kill -s QUIT #{pid}" if pid > 0
      end

      desc "Cleans up the old unicorn processes"
      task :cleanup do
        run "touch #{unicorn_old_pid}"
        pid = capture("cat #{unicorn_old_pid}").to_i
        run "kill -s QUIT #{pid}" if pid > 0
        ensure_writable_dirs
      end

      task :ensure_writable_dirs do
        dir = File.dirname(unicorn_pid)
        run "chmod a+w #{dir}"
      end
    end
  end
end