cgi script to handle `git push` hook and to deploy project

start.cgi

#!/home/katsumatv/.rvm/rubies/ruby-1.9.3-p125/bin/ruby
ENV['GEM_HOME'] = '/home/katsumatv/.rvm/gems/ruby-1.9.3-p125'
ENV['PATH'] = "#{ENV['PATH']}:/home/katsumatv/.rvm/gems/ruby-1.9.3-p125/bin:/home/katsumatv/bin"

require 'rubygems'
require 'sinatra'
require 'json'

get '/' do
  status 403
end

get '/deploy' do
  status 403
end

post '/deploy' do
  user = 'katsumatv'
  server = 'katsuma.tv'
  workspace = "/home/katsumatv/var/cache"
  allowed_apps = { 'ton.katsuma.tv' => 'www/ton' }

  payload = params[:payload] ? JSON.parse(params[:payload]) : nil
  status 403 && return if payload.nil?

  app = payload["repository"]["name"]
  status 403 && return unless allowed_apps.keys.include? app

  target_dir = allowed_apps[app]
  `cd #{workspace}/#{app} && git pull origin master && echo "#{Time.now.to_s}" >> #{workspace}/#{app}/public/revision`
  `rsync -avz #{workspace}/#{app}/public/ #{user}@#{server}:#{target_dir}`
  `cd #{workspace}/#{app} && git reset --hard`
  "done"
end


set :run => false
Rack::Handler::CGI.run Sinatra::Application