File utility - removes unused files

Rakefile

desc "Checks files in app and public against everything in the images directory"
task :delete_unused_images do
  unused_images.each do |image|
    puts "#{red('[delete]')} #{image}"
    `rm #{image}`
  end 
end

desc "Shows all unused images"
task :unused_images do
  unused_images.each{|image| puts "#{image}" }
end

def images_not_directly_used
  FileList.new('public/images/*').map do |abs_file| 
    filename = File.basename(abs_file)
    grep_results = `grep -r #{filename} "#{search_folders(ENV['PROJECT'])}"` #missing a piece
#find each class/id, see if it's referenced 
    abs_file unless grep_results[filename]
  end.compact
end

def images_not_indirectly_used
=begin
 Return each line in css file with image name in it
 Parse line for css selector
 Break up css selector
 if most specific is id or class
	   find in app dir or delete
		 if most specific not id or class
			   print as too general 
=end
 raise Error
end

def unused_images
  images_not_directly_used and images_not_indirectly_used
end

def search_folders(name)
  environments = {
    'rails'  => %w(app/views),
    'nodejs' => %w(public)
  }
  (environments[name] || environments['rails']).join(',')
end

def colorize(text, color_code)
"#{color_code}#{text}\033[0m"
end

def red(text); colorize(text, "\033[31m"); end 
def green(text); colorize(text, "\033[32m"); end