gistfile1.txt

    desc "Copies order insertion"
    task :copy_order_insertion => :environment do
      current_version = ENV['CURRENT_VERSION'].try(:upcase)
      raise "Must specify CURRENT_VERSION" unless current_version
      new_version = ENV['NEW_VERSION'].try(:upcase)
      raise "Must specify NEW_VERSION" unless new_version

      # copy files
      paths = %w[
        app/models
        app/views
        spec/models
      ]
      paths.each do |path|
        `rm -r #{File.join(path, new_version.underscore )}`
        `cp -R #{File.join(path, current_version.underscore )} #{File.join(path, new_version.underscore )}`
      end

      # replace current_version with new version
      from = current_version
      to = new_version
      roots = paths.map { |path| File.join(path, new_version.underscore ) }
      roots.each do |dirname|
        filenames = Dir.glob(File.join(dirname, '**', '*'))
        filenames.each do |filename|
          next if File.directory?(filename)
          ##next if exclude_dirs.detect { |exclude_dir| filename[exclude_dir] }
          body = File.read(filename)
          new_body = body.gsub(from, to)
          if body != new_body
            puts "replace #{from} to #{to} in #{filename}"
            File.write(filename, new_body)
          end
        end
      end
    end