Deploy script for rails applications under version control

tobi (Tobias Luetke) — Thu, 07 Apr 2005 09:42:10 GMT
#!/usr/bin/env ruby



require 'yaml'

require 'rubygems'

require_gem 'net-ssh'



$stdout.sync = true



def help

  puts <<-USAGE

This tool allows you to conviniently deploy your projects on production

or staging servers.



  Useage:

    deploy 

    Please specify configuration in ~/.deployrc

    

  Example:  

    

    example ~/.deployrc:   

    

      hieraki:

        server: linux

        get: svn export svn://myserver/hieraki/trunk

        directory: /var/www/applications/hieraki

        test: RAILS_ENV=production rake



        after_test:

          - chmod 777 log/

          - chmod 666 log/*



        after_commit:

          - sudo /etc/init.d/apache reload    



  Note: 

  

    server, get and directory are required

    

    available hooks are

      - after_connect

      - after_deploy

      - after_test

      - after_commit

        

  USAGE

  exit

end



def do_exec(cmd)

  print "\n\n  #{cmd}\n    "

  

  stderr = ""

  $session.process.open( cmd ) do |cmd|

    cmd.on_exit do |p, status|

      if status == 0

        print "[done]\n" 

      else

        puts "    #{stderr}"        

        print "[failed]\n" 

        exit

      end

    end

    

    cmd.on_stderr do |p, data|

      stderr << data.gsub(/\n/, "\n    ")

    end    

    cmd.on_stdout do |p, data|

      STDOUT << data.gsub(/\n/, "\n    ")

    end                

  end  

end



# Batch jobs



def deploy

  puts      "\ndeploying"  



  print     "  creating dirs"

  do_exec   "mkdir -p #{$config['directory']}" 



  print     "  get"

  do_exec   "#{$config['get']} #{$config['deploy']}"

end



def test

  puts      "\ntesting"  

  do_exec   "cd #{$config['deploy']}; #{$config['test']}"

end



def commit

  puts      "\ncomitting"

  print     "  creating new link"

  do_exec   "ln -nfs #{$config['deploy']}/ #{$config['target']}"

end



def run_tasks(tasks)

  $config[tasks].to_a.each do |task|    

    do_exec "cd #{$config['deploy']}; #{task}" 

  end

end





app_name = ARGV[0] || help

$config = YAML::load(File.open(File.expand_path("~/.deployrc")))[app_name]



# compute deploy directory 

$config['deploy'] = $config['directory'] + "/#{Time.now.strftime("%Y%m%d-%H%M")}"

# compute target directory 

$config['target'] = $config['directory'] + "/latest"



puts "deploying #{app_name} to #{$config["server"]}"



$session = Net::SSH.start( $config["server"] )



run_tasks("after_connect")  

deploy

run_tasks("after_deploy")

test

run_tasks("after_test")

commit

run_tasks("after_commit")

puts ""

puts "success!"
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Deploy script for rails applications under version control
