ember assetfile with less and 0.6 rake-pipeline

app_less_filter.rb

class CustomLessFilter < Rake::Pipeline::Filter
	include Rake::Pipeline::Web::Filters::FilterWithDependencies

	attr_reader :options

	def initialize(options={}, context = nil, &block)
		block ||= proc { |input| input.sub(/\.less$/, '.css') }
		super(&block)
		@options = options
	end

	def generate_output(inputs, output)
		parser = Less::Parser.new :paths => ['less']
		inputs.each do |input|
                        name = File.basename(input.path, '.less')
                        //OJO: HERE... it will only load the main file which imports the other files
			output.write parser.parse(input.read).to_css if name == 'main'
		end
	end

	def external_dependencies
		[ 'less' ]
	end
end

input "less"  do
	match "*.less" do
		filter CustomLessFilter 
		concat "project.css"
	end
end

Assetfile.rb

require "rake-pipeline-web-filters"
require "json"
require "less"


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|
      name = File.basename(input.path, '.handlebars')
      output.write "Ember.TEMPLATES['#{name}'] =  Ember.Handlebars.compile(#{input.read.to_json});"
      #output.write "return Ember.Handlebars.compile(#{input.read.to_json})"
    end
  end
end

output "source"

input "less"  do

	match "main.less" do

	  less :paths => ['less']
		copy "project.css"

	end

end



input "templates"  do

	# TODO: include in minispade
	match "*.handlebars" do
		filter HandlebarsFilter
		concat "templates.js"
	end

end

input "packages"  do

	# also include app, it could be improved
	match "*/lib/**/*.js" do
		minispade :rewrite_requires => true, :string=> false, :module_id_generator => proc { |input|
			id = input.path.dup
			id.sub!('/lib/', '/')
			id.sub!(/\.js$/, '')
			id.sub!(/\/main$/, '')
			#id.sub!('/tests', '/~tests')
			id
		}
		filter ConcatFilter, "packages.js"
	end

	match "*.css" do
		filter ConcatFilter, "embermk.css"
	end

end

# TODO: ideally in the same file
input "app"  do

	match "*/lib/**/*.js" do
		minispade :rewrite_requires => true, :string=> false, :module_id_generator => proc { |input|
			id = input.path.dup
			id.sub!('/lib/', '/')
			id.sub!(/\.js$/, '')
			id.sub!(/\/main$/, '')
			#id.sub!('/tests', '/~tests')
			id
		}
		filter ConcatFilter, "app.js"
	end

end


# vim: filetype=ruby

main.less

@import 'account';
@import 'brand';
@import 'button';
@import 'city';
@import 'comment';
@import 'common';
@import 'contacts';
@import 'footer';
@import 'invitation';
@import 'map';
@import 'me';
@import 'normalize';
@import 'popup';
@import 'product';
@import 'qr';
@import 'start';