Ruby Get Line Endings

get-lineendings.rb

#!/usr/bin/env ruby

ARGF.each do |line|
  if $. == 1
    if line =~ /\r\n$/
      puts "CRLF"
    elsif line =~/\n$/
      puts "LF"
    elsif line =~ /\r$/
      puts "CR"
    else
      puts "Line endings not detected."
    end
  end
end