class BackupApp

# File lib/commands/backup_app.rb, line 12
def backup
  app_backup_dir = "#{backup_dir}/#{@app_name}"
  tmp_dir = "#{app_backup_dir}/tmp"

  FileUtils.mkdir_p app_backup_dir
  FileUtils.mkdir_p tmp_dir

  before_all = "#{apps_dir}/#{@app_name}/administration/hooks/backup.d/before_all"
  after_all = "#{apps_dir}/#{@app_name}/administration/hooks/backup.d/after_all"

  FileUtils.cd "#{apps_dir}/#{@app_name}" do 
    puts `#{before_all}` if File.exist? before_all
    service_hooks_for(@app_name,"backup").each do | service_name |
      FileUtils.mkdir_p "#{tmp_dir}/#{service_name}"
      puts "executing #{apps_dir}/#{@app_name}/administration/hooks/backup.d/#{service_name} #{tmp_dir}/#{service_name}"
      Open3.popen3("#{apps_dir}/#{@app_name}/administration/hooks/backup.d/#{service_name} #{tmp_dir}/#{service_name} 2>&1")  do  |i,o,e,th|
        while line=o.gets do 
          puts line
        end
      end
    end
    puts `#{after_all}` if File.exist? after_all
  end

  puts `tar czf #{app_backup_dir}/#{@app_name}_#{Time.now.to_i}.tar.gz --directory=#{app_backup_dir} tmp`

  FileUtils.rm_rf tmp_dir

  entries = Dir.entries("#{app_backup_dir}")
  .select { | entry | entry != "." && entry != ".." && entry.start_with?("#{@app_name}_") }
  .sort { | a,b | extract_date(b) <=> extract_date(a) }
  .drop(3)
  .each { | entry | FileUtils.rm "#{app_backup_dir}/#{entry}"}



end