Processes a directory of files and ERB templates into a destination directory (within the Rails app's environment).

directory_generator.rb

# DirectoryGenerator.new.generate(Rails.root.join('src'), Rails.root.join('public', 'dest'))


class DirectoryGenerator
  include Rails.application.routes.url_helpers
  include ActionView::Helpers::TagHelper
  default_url_options[:host] = 'www.example.com'

  def generate(source, destination)
    FileUtils.rmtree(destination)
    FileUtils.mkdir_p(destination)

    Dir.glob(File.join(source, '*')).each do |path|
      pathname = Pathname.new(path)
      if pathname.extname == '.erb'
        File.open(destination.join(pathname.basename.sub(/\.erb$/, '')), 'w') do |file|
          file.puts(ERB.new(File.read(path)).result(binding))
        end
      else
        FileUtils.cp(pathname, File.join(destination, pathname.basename))
      end
    end
  end
end