rgzip.rb

#!/usr/bin/env ruby

# A simple script to gzip content recursively. I use it for the Nginx gzip_static module.

require 'find'

EXTENSIONS = %w(.js .html .css)

def gzname(file)
  "#{file}.gz"
end

def compress(file)
  puts "compressing #{file}"
  system %(gzip -c -9 "#{file}" > "#{gzname(file)}")
end

def compress?(file)
  if EXTENSIONS.include?(File.extname(file))
    !File.exists?(gzname(file)) || File.mtime(gzname(file)) < File.mtime(file)
  end
end

ARGV.each do |dir|
  Find.find(dir) do |file|
    compress(file) if compress?(file)
  end
end

thanks :)