History merge tool for zsh

zsh_history_merge.rb

#!/usr/bin/env ruby -E BINARY

# The original script was published in zsh thread@2ch.net and is licensed under the public domain.

history = []
l = nil

while l = gets
  while /\\\Z/ === l
    l << gets
  end
  history << l
end

puts history.sort
#puts history.sort.uniq

# 'uniq' is not work well because history = [': 1332408755:0;ls', ': 1332408761:0;ps', ...]
# You shoud leave unifying history to zsh.