gistfile1

#!/usr/bin/env ruby -w
# R Kumar
# 2010-06-29 10:24 
require 'fileutils'
require 'tempfile'

# edits given text using EDITOR
# @param [String] text to edit
# @return [String, nil] edited string, or nil if no change
def edit_text text
  ed = ENV['EDITOR'] || "vim"
  temp = Tempfile.new "tmp"
  puts temp
  File.open(temp,"w"){ |f| f.write text }
  mtime =  File.mtime(temp.path)
  system("#{ed} #{temp.path}")

  newmtime = File.mtime(temp.path)
  newstr = nil
  if mtime < newmtime
    # check timestamp, if updated ..
    newstr = ""
    File.open(temp,"r"){ |f| f.each {|r| newstr << r } }
    #puts "I got: #{newstr}"
  else
    #puts "user quit without saving"
  end
  return newstr
end

puts "Enter a few lines and press Ctrl-d"
str = $stdin.read
puts
puts edit_text str if str