tail.css/bin/emit

#!/usr/bin/env ruby
$stdout.sync = true

def noecho
  system("stty -echo")
  yield
ensure
  system("stty echo")
end

def read
  noecho { $stdin.gets }
  .gsub(/[^A-Za-z0-9_\s\/\-,;:*"'.()#%]/, '')
end

open = false
loop do
  tab, buf = "\t", read
  if buf.include?(tab)
    print "\n}\n" if open
    class_name, class_body = buf.split(tab, 2)
    class_name.gsub!(%r|([/.])|) { "\\#{_1}" }
    print ".#{class_name} {", "\n", " " * 2, class_body.chomp
    open = true
  elsif buf.include?(":")
    print "\n", " " * 2, buf.chomp
  elsif open
    open = false
    print "\n}\n"
  end
end