Setup Rails apps on the production server as a git repo and creates the Apache virtual host.

apps

#!/usr/bin/ruby
require 'fileutils'
require 'rubygems'
require 'commander/import'
require 'ostruct'
require 'yaml'

class AppSetuper

  DEPLOY_TO   = "/var/www"
  VHOSTS_PATH = "/etc/apache2/vhosts.d"
  DB_FILE     = "production"
  DOMAIN      = "tre-rs.gov.br"
  OWNER       = "apache"

  def initialize(app_name, opts = {})
    @app_name = app_name
  end

  def setup
    
    log "\nSetting Up...\n"

    create_git_repo

    create_hook_script

    create_vhost

  end

  def create_git_repo

    FileUtils.cd DEPLOY_TO
    
    FileUtils.mkdir_p @app_name
    FileUtils.cd @app_name
    
    %x{ git init }
    
    FileUtils.chown_R OWNER, OWNER, "#{DEPLOY_TO}/#{@app_name}"
    
    say "=> Created git repo in #{DEPLOY_TO}/#{@app_name}"

  end

  def create_hook_script

    @post_update = <<-PU
      #!/bin/sh
      exit_with_error() {
        echo "!!!! An error has occurred !!!!"
        exit 1
      }

      # Initial directory is .git, so go to the working copy directory
      cd ..

      export RAILS_ENV="production"

      echo "************************"
      echo "Deploying application..."
      echo "************************"

      # Add everything to the index and then reset hard to both sweep changed files (like cached pages)
      # and update the working copy.
      echo " * Updating application working tree"
      env -i git add .
      env -i git reset --hard || exit_with_error#

      echo " * Updating database configuration"
      cp config/database.#{DB_FILE}.yml config/database.yml || exit_with_error

      echo " * Restarting app"
      mkdir -p log
      mkdir -p tmp
      touch tmp/restart.txt

      echo "*************************"
      echo "Successfully deployed app"
      echo "*************************"

    PU

    FileUtils.cd DEPLOY_TO
    FileUtils.cd @app_name

    File.open(".git/hooks/post-receive", 'w') do |f|        
      f.write(@post_update)
    end
    
    FileUtils.chmod 0755, ".git/hooks/post-receive"
    FileUtils.chown OWNER, OWNER, ".git/hooks/post-receive"

    %x{ git config receive.denyCurrentBranch ignore }

    say "=> Updated post-receive script in .git/hooks/post-receive"

  end

  def create_vhost

    @vhost_text = <<-VH

          <VirtualHost *:80>
              ServerName #{@app_name}.#{DOMAIN}
              ServerAlias #{@app_name}
              DocumentRoot #{DEPLOY_TO}/#{@app_name}/public
              SetOutputFilter DEFLATE
          </VirtualHost>

          <Directory "#{DEPLOY_TO}/#{@app_name}/public">
             Options FollowSymLinks
             AllowOverride None
             Order allow,deny
             Allow from all
          </Directory>

          <Directory "/">
             Options FollowSymLinks
             AllowOverride None
             Order allow,deny
             Allow from all
          </Directory>
    VH

    FileUtils.cd VHOSTS_PATH
    File.open("#{@app_name}.conf", 'w') do |f|        
      f.write(@vhost_text)
    end

    say "=> Created apache vhost in #{VHOSTS_PATH}/#{@app_name}.conf"

    say "=> Restarting apache..."
    
    %x{ /etc/init.d/apache2 restart }

    say "=> Done"

  end
 
end

program :name, 'RailsAppSetuper'
program :version, '1.0.0'
program :description, 'Setup Rails apps on the production server as a git repo and creates the Apache virtual host.'
#program :help_formatter, Commander::HelpFormatter::TerminalCompact

command :setup do |c|
  
  c.syntax = 'app setup [app_name1, app_name2, ...]'
  c.description = 'do all the work (create git repo, create hook script and create apache vhost)'

  c.option "--[no-]vhost", "Skip vhost creation"
  c.option "--[no-]hook", "Skip git hook script creation"
  c.option "--[no-]git", "Skip git repository creation"
  
  c.action do |args, opts|
    opts.default :vhost=>true, :hook=>true, :git=>true
    unless args[0]
      say "ERROR: Please inform at least ONE [app_name]" 
      exit
    end
    args.each do |app|
      a = AppSetuper.new(app)

      a.create_git_repo     if opts.git
      a.create_hook_script  if opts.hook
      a.create_vhost        if opts.vhost

      say "=> To deploy to this server, create a remote on your git workin tree, using the command: \n\n"
      say "      git remote add deploy #{AppSetuper::OWNER}@#{%x{ hostname }.chomp}.#{AppSetuper::DOMAIN}:#{app}/.git"
      say "      git push deploy master \n\n"

    end
  end

end

default_command :setup