Node.js with Express, deploy through web hook. this is route part code.

routeDeploy.js

var exec = require('child_process').exec;

var set = function (app) {

  app.post('/deploy', function (req, res) {
    var feedback;
    var branch = 'master';

    try {
      feedback = JSON.parse(req.body.payload);
      console.log(feedback);
    } catch (e) {
      console.log('[STATUS] payload parse error');
      return res.send('[STATUS] payload parse error');
    }
    if (feedback.ref.match('master')) {
      exec('bash -x /path/install.sh', function (error, stdout, stderr) {
        console.log('[STATUS] deploy server');
        console.log(error);
        console.log(stdout);
        console.log(stderr);
        res.send('[STATUS] deploy server');
      });
    } else {
        res.send('[STATUS] deploy server NOT in master branch');
    }
  });
};

module.exports.set = set;

server.js

var express = require('express')
  , http = require('http')
  , deploy = requre('./routeDeploy')
  , path = require('path');

var app = express();

app.configure(function(){
  app.use(express.compress());
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser('your secret here'));
  app.use(express.session());
  app.use(app.router);
  app.use(require('stylus').middleware(__dirname + '/public'));
  app.use(express.static(path.join(__dirname, 'public')));
});


app.configure('development', function(){
  app.use(express.errorHandler());
});

deploy.set(app);

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});