gistfile1

#!/usr/bin/ruby
#

require 'pp'

term_lines=`tput lines`.to_i

# tput doesn't exist.
if $? == 127
  exec "cat -"
end

input = ARGF.read( 65536 )
exit if input.nil?

lines_of_input = input.split( "\n" )
num_lines = lines_of_input.count

# So if the lines are longer than  the size of the term, then bump up the number
# of lines too.
lines_of_input.each do |x|
  num_lines +=  x.size / `tput cols`.to_i
end

if num_lines > term_lines 
  begin
    IO.popen( "less -re" , "w" ) do |less|
      less.puts ""
      less.puts lines_of_input.join( "\n" )
    end
  rescue Errno::EPIPE => e
    exit
  rescue Errno::EINVAL => e
    exit
  end
else
  puts input
end

__END__

if [ ${#input} -gt $LINES  ]
then
	( for x in "${input[@]}"; do
	   echo "$x"
	done ) | less -re
	# echo "${input[@]}" | less -re
else
	echo "${input[@]}"
fi