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/**
* Service which will listen for a Github webhook, fired on push.
* This service can be used to rebuild / restart the app automatically
* when new code is pushed.
*/
var crypto = require('crypto')
var exec = require('child_process').exec
var path = require('path')
function OKWebhook (options) {
if (!(this instanceof OKWebhook)) return new OKWebhook(options)
options = options || {}
if (!options.express)
throw new Error('Express not provided to OKWebhook');
if (!options.config)
throw new Error('Configuration not provided to OKWebhook');
if (options.config.active && !options.config.secret)
throw new Error('Github secret not provided to OKWebhook');
if (options.config.active && !options.config.command)
throw new Error('Build command not provided to OKWebhook');
var express = options.express
var router = express.Router()
var config = options.config
var secret = config.secret
var command = config.command
router.get('/', function (req, res) {
res.send('GET not supported')
})
router.post('/', getBody, function (req, res) {
if (!config.active)
return
console.log("OKWebhook received push")
var event = req.headers['x-github-event']
if (event !== "push") {
return res.sendStatus(500)
}
var sig = req.headers['x-hub-signature'].split('=')[1]
var text = req.rawBody
var hash = crypto.createHmac('sha1', secret).update(text).digest('hex')
if (hash !== sig) {
return res.sendStatus(500)
}
res.sendStatus(200)
var cwd = path.dirname(command)
exec(command, { cwd: cwd }, function(err, stdout, stderr){
// may not fire if process was restarted..
console.log(process.env)
console.log(stdout)
})
})
function getBody (req, res, next) {
req.rawBody = ''
// req.setEncoding('utf8')
req.on('data', function(chunk) {
req.rawBody += chunk
})
req.on('end', function() {
try {
req.body = JSON.parse(req.rawBody)
} catch (e) {
return res.sendStatus(500)
}
next()
})
}
this._router = router
}
OKWebhook.prototype.middleware = function () {
return this._router
}
module.exports = OKWebhook
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