bottom-justify.rb

#!/usr/bin/env ruby
# 
# I have a couple of GeekTool windows at the bottom of the screen, 
# where it's nice to bottom-justify their contents, but GeekTool 
# doesn't seem to support this natively.
#
# Usage: 
#   cat TODO.rdoc | bottom-justify.rb 24
#
# It seems like there could be a nice shell command for this, 
# something like `tail -n 24`, except tail doesn't insert the blank 
# lines. Am I missing something?

height = ARGV.shift.to_i
lines  = ARGF.readlines

(height - lines.length).times { puts }

puts lines