compiling handlebars with rake

handlebars.rake

task :handlebars => :environment do
  puts "Compiling Handlebars templates"
  files = Rake::FileList["app/assets/javascripts/templates/**/*.hbs"]
  compiled_js = ""
  files.each do |file|
    openFile = File.open(file)
    pathName = openFile.to_path.sub("app/assets/javascripts/templates/", "")[0...-4]
    content = openFile.read
    compiled = HandlebarsAssets::Handlebars.precompile(content, HandlebarsAssets::Config.options)
    compiled_js += "(function() {\nthis.HandlebarsTemplates || (this.HandlebarsTemplates = {});\nthis.HandlebarsTemplates[\"" + pathName + "\"] = Handlebars.template(" + compiled + ");\n}).call(this);\n\n\n"
  end

  output = File.new("app/assets/javascripts/templates/compiled.js", "w")
  output.puts(compiled_js)
  output.close
end