Polls your git repo and kicks off CI Joe builds upon new commits. Useful for CI Joe servers running behind a firewall.

cijoe_github_poller.rb

require 'yaml'
require 'net/http'

PROJECT_PATH = '/Users/mbuck/src/applicant_portal/hr_suite'
PORT = 3000

def current_sha
  `cd #{PROJECT_PATH} && git rev-parse origin/master`.chomp
end

def last_built_sha
  last_build_file = File.join(PROJECT_PATH, '.git', 'builds', 'last')
  current_build_file = File.join(PROJECT_PATH, '.git', 'builds', 'current')

  if File.exist?(last_build_file) && !File.exist?(current_build_file)
    config = YAML.load(File.read(last_build_file))
    return config[4]
  end

  return false
end

def git_update
  `cd #{PROJECT_PATH} && git fetch origin && git reset --hard origin/master`
end

while true
  git_update

  last = last_built_sha
  current = current_sha

  if last && (last != current)
    Net::HTTP.post_form(URI.parse("http://0.0.0.0:#{PORT.to_s}/"), {'build' => 'now'})
  end

  sleep 60
end

Run this with nohup, a là nohup cijoe_github_poller.rb &