simple method to "prettify" compressed CSS. useful with compass in config.rb

unminify.rb

def unminify(filename)
  raise "file not found #{filename}" unless File.exists? filename
  text = []
  File.open(filename, 'r:UTF-8') do |f|
    f.each_line do |line|
      line.strip!

      code = line
            .split("\t").join(" ")
            .gsub(/\s*{\s*/i, " {\n  ")
            .gsub(/;\s*/i, ";\n  ")
            .gsub(/,\s*/i, ", ")
            .gsub(/[ ]*}\s*/i, "}\n")
            .gsub(/\}/i, "\n}")
            .gsub(/\n  (?<r>[^:]+):\s*/i, "\n  " + '\k<r>: ')
            .gsub(/  @/, '@')
            .gsub(/\*\/((?<r>.*))/, "*/\n" + '\k<r>')

      text.push(code)
    end
  end
  File.open(filename, 'w:UTF-8') do |f|
    f.write(text.join("\n").strip + "\n")
  end
end