LabiKyo

less2stylus = (string) ->
  string = string
    .replace(/^(\ *)(.+)\ +\{\ *\n?\ */mg, "$1$2\n$1 ") # remove opening brackets
    .replace(/^(\ *)([^\ \n]+)\ +\{\ *\n?\ */mg, "$1$2\n$1 ") # remove opening brackets
    .replace(/\ *\{\ *\n*/g, "\n") # remove opening brackets again (some random cases I'm too lazy to think through)
    .replace(/\ *\}\ *\n*/g, "\n") # remove closing brackets
    .replace(/\;\ *?$/gm, "") # remove semicolons
    .replace(/@(\w+):(\ *)\ /g, (_, $1, $2) -> # replace @variable: with $variable =
      "$#{$1}#{$2} = "
    )