Module: Middleman::Extensions::Gzip::InstanceMethods

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# File 'middleman-more/lib/middleman-more/extensions/gzip.rb', line 39

def gzip_file(path, builder)
  input_file = File.open(path, 'r').read
  output_filename = path + '.gz'
  input_file_time = File.mtime(path)

  # Check if the right file's already there
  if File.exist?(output_filename) && File.mtime(output_filename) == input_file_time
    return
  end

  File.open(output_filename, 'w') do |f|
    gz = Zlib::GzipWriter.new(f, Zlib::BEST_COMPRESSION)
    gz.mtime = input_file_time.to_i
    gz.write input_file
    gz.close
  end

  # Make the file times match, both for Nginx's gzip_static extension
  # and so we can ID existing files. Also, so even if the GZ files are
  # wiped out by build --clean and recreated, we won't rsync them over
  # again because they'll end up with the same mtime.
  File.utime(File.atime(output_filename), input_file_time, output_filename)

  old_size = File.size(path)
  new_size = File.size(output_filename)

  size_change_word = (old_size - new_size) > 0 ? 'smaller' : 'larger'

  builder.say_status :gzip, "#{output_filename} (#{number_to_human_size((old_size - new_size).abs)} #{size_change_word})"
end