gistの貼り付けタグのScriptからHTMLにする。 ref: http://qiita.com/items/333e7d9c9b16ab566665

gist2html.rb

#!/usr/bin/env ruby 
require 'openssl'
require 'open-uri'
require 'rubygems'
require 'json'

if ARGV.size < 1 || ! (/([0-9]+)/ =~ ARGV[0])
    puts "Usage : Gist のIDを指定。"
    puts "以下のように指定"
	puts "    #{__FILE__} https://gist.github.com/3033059 "
	puts "    #{__FILE__} https://gist.github.com/3033059.js "
	puts "    #{__FILE__} https://gist.github.com/3033059.json "
	puts "    #{__FILE__} 3033059 "
	exit
end


id = $1
json = open("https://gist.github.com/#{id}.json").read
data = JSON.load json
puts '<style>'
puts 'div.highlight{ background-color: #FFFFFF !important;}' #はてなダイアリーとかぶるので。
puts open('https://gist.github.com/stylesheets/gist/embed.css').read
puts '</style>'
puts data["div"]