pipe something to ruby and print terminal-width

test.rb

#!/bin/ruby

require 'pp'	# equivalent to data::dumper

# require 'terminfo'
# TermInfo.control("cuf", 7)    # cursor forward 7 columns
# p TermInfo.screen_size        # use TIOCGWINSZ, LINES/COLUMNS env. or terminfo lines#/cols#
# puts STDIN.winsize

require 'readline';
puts Readline.get_screen_size

puts ENV['COLUMNS']

require 'io/console';
puts STDIN.winsize

require 'curses';
puts Curses.cols