My assetfile

require "json"
require "rake-pipeline-web-filters"
class HandlebarsFilter < Rake::Pipeline::Filter
  def initialize(&block)
    block ||= proc { |input| input.sub(/\.handlebars$/, '.js') }
    super(&block)
  end

  def generate_output(inputs, output)
    inputs.each do |input|
      output.write "return Ember.Handlebars.compile(#{input.read.to_json})"
    end
  end
end

# process all js, css and html files in app/assets
input "assets"

# processed files should be outputted to public
output "public"

# process all coffee files
# match "*.coffee" do
  # compile all CoffeeScript files. the output file
  # for the compilation should be the input name
  # with the .coffee extension replaced with .js
  # filter(CoffeeCompiler) do |input|
    # input.sub(/\.coffee$/, '.js')
  #end 
# end

match "*.js" do
  filter Rake::Pipeline::Web::Filters::MinispadeFilter
end

match "*.handlebars" do
  filter HandlebarsFilter
  filter Rake::Pipeline::Web::Filters::MinispadeFilter
  filter Rake::Pipeline::ConcatFilter, "templates.js"
end
  
  


Rake::Pipeline.build do

  # specify filters for js files. this includes the
  # output of the previous step, which converted
  # coffee files to js files
  match "*.js" do
    # then, concatenate all JS files into a single file
    filter Rake::Pipeline::ConcatFilter, "application.js"
  end

end