use gist as memo pad

gistpad

#!/usr/bin/env ruby
# usage: gistpad [id]

require 'rubygems'
require 'gisty'
require 'temp_dir'

class GistPad < Gisty
  @commands = {
    :push   => 'push origin master', 
    :commit => "commit %s -m memo."
  }
  @commands.each do |method, option|
    define_method method do |file|
      dir, base = File.split file
      FileUtils.cd dir do
        Kernel.system "git #{option}" % file
      end
    end
  end 
end

CONF_PATH = ENV['HOME'] + '/.gistpad'
EDITOR    = ENV['EDITOR'] || 'vi'
FILE_NAME = 'blog.txt'
GISTY_DIR = ENV['GISTY_DIR']

def main arg
  @g = GistPad.new ENV['GISTY_DIR']
  id = if arg =~ /^\d+$/
    arg
  elsif File.exist? CONF_PATH
    File.read CONF_PATH
  else
    nil
  end
  id ? edit(id) : init
end

def edit id
  file = [GISTY_DIR, id, FILE_NAME].join('/')
  unless File.exist? file
    @g.clone id
    File.open(CONF_PATH, 'w') {|f| f.write id }
  end
  Kernel.system EDITOR, file
  @g.commit file
  @g.push file
end

def init
  id = nil
  TempDir.create do |dir|
    file = "#{dir}/#{FILE_NAME}"
    unless Kernel.system EDITOR, file
      raise 'editor ended abnormally.'
    end
    url = @g.create(file, :private => true)
    id = url.split('/').last
  end 
  @g.clone id
  File.open(CONF_PATH, 'w') {|f| f.write id }
end

main ARGV[0]