Image Coverage in Rails Project

img_coverage.rb

require "fileutils"

image_files = Dir.glob("**/*.jpeg") + Dir.glob("**/*.jpg") + Dir.glob("**/*.png") + Dir.glob("**/*.gif")
data_files = Dir.glob("**/*.rb") + Dir.glob("**/*.html.erb") + Dir.glob("**/*.css") + Dir.glob("**/*.css.erb") + Dir.glob("**/*.js") + Dir.glob("**/*.js.erb")

puts image_files.length.to_s + " images found & " + data_files.length.to_s + " files found to search against"

content = data_files.inject("") { |c, f| c += File.open(f, 'r').read }

#This script may not look for the images that are dynamically generated (using loop etc.)
image_files.each do |img|
  name = File.basename(img)
  if !(content =~ Regexp.new(name))
    dirname = File.dirname(img)
    FileUtils.mkdir_p("../unused/" + dirname)
    FileUtils.cp(img, "../unused/" + img)
    puts "Image " + img + " copied to ../unused/" + dirname + " folder"
  end
end