Express route to listen for hooks from GitHub on `POST /hook', and if a matching hook is found, then run `git pull` and crash the server. Handy if you want to be able to auto-update a running server whenever code is pushed to master - just run the server in Forever or Node-Supervisor and have that daemon restart the server on crash.

Route.coffee

{exec} = require 'child_process'
target =
  repo: 'platform'
  branch: 'refs/heads/master'

update = ->
  exec 'npm install && git pull', (err, stdout, stderr) ->
   if err then console.error "Could not update application:", err
    process.exit(0)

app.post '/hook', (req, res) ->
  res.send 204 # Hang up

  # Sanity check to make sure this is a valid GitHub request
  unless req?.body?.payload and req.headers['x-github-event']
    console.error "Bad hook received at POST:/hook - #{req.body}"
    return

  try # Format our hook's payload
    hook = JSON.parse(req.body.payload)
  catch e
    console.error "Invalid JSON from GitHub: #{req.body.payload}"
    return

  if hook.repository.name is target.repo and hook.ref is target.branch
    update()