text: #Github pull reqest builder for Jenkins 
  
  import json
  import os
  import re
  import urllib2
  import urllib
  import base64
  import requests
  import sys
  import traceback
  import platform
  import subprocess
  
  #set Jenkins build description using submitDescription to mock browser behavior
  #TODO: need to set parent build description 
  def set_description(desc, url):
      req_data = urllib.urlencode({'description': desc})
      req = urllib2.Request(url + 'submitDescription', req_data)
      #print(os.environ['BUILD_URL'])
      req.add_header('Content-Type', 'application/x-www-form-urlencoded') 
      base64string = base64.encodestring(os.environ['JENKINS_ADMIN']+ ":" + os.environ['JENKINS_ADMIN_PW']).replace('\n', '')
      req.add_header("Authorization", "Basic " + base64string)
      try:
          urllib2.urlopen(req)
      except:
          traceback.print_exc()
  def main():
      #get payload from os env
      payload_str = os.environ['payload']
      payload_str = payload_str.decode('utf-8','ignore')
      #parse to json obj
      payload = json.loads(payload_str)
  
      #get pull number
      pr_num = payload['number']
      print 'pr_num:' + str(pr_num)
  
      #build for pull request action 'open' and 'synchronize', skip 'close'
      action = payload['action']
      print 'action: ' + action
  
      pr = payload['pull_request']
      
      url = pr['html_url']
      print "url:" + url
      pr_desc = '<h3><a href='+ url + '> pr#' + str(pr_num) + ' is '+ action +'</a></h3>'
      
  
  
      #get statuses url
      statuses_url = pr['statuses_url']
  
      #get pr target branch
      branch = pr['base']['ref']
  
      #set commit status to pending
      #target_url = os.environ['BUILD_URL']
      jenkins_url = os.environ['JENKINS_URL']
      job_name = os.environ['JOB_NAME'].split('/')[0]
      build_number = os.environ['BUILD_NUMBER']
      target_url = jenkins_url + 'job/' + job_name + '/' + build_number + '/'
  
      set_description(pr_desc, target_url)
      
      if(action == 'closed'):
          print 'pull request #' + str(pr_num) + ' is '+action+', no build triggered'
          return(0)
    
      r = requests.get(pr['url']+"/commits")
      commits = r.json()
      last_commit = commits[len(commits)-1]
      message = last_commit['commit']['message']
  
      pattern = re.compile("\[ci(\s+)skip\]", re.I)
      result = pattern.search(message)
      if result is not None:
          print 'skip build for pull request #' + str(pr_num)
          return(0)
      
      data = {"state":"pending", "target_url":target_url}
      access_token = os.environ['GITHUB_ACCESS_TOKEN']
      Headers = {"Authorization":"token " + access_token} 
  
      try:
          requests.post(statuses_url, data=json.dumps(data), headers=Headers)
      except:
          traceback.print_exc()
  
      #reset path to workspace root
      os.system("cd " + os.environ['WORKSPACE']);
      os.system("git checkout develop")
      os.system("git branch -D pull" + str(pr_num))
      #clean workspace
      print "git clean -xdf"
      os.system("git clean -xdf")
      
     
      #fetch pull request to local repo
      git_fetch_pr = "git fetch origin pull/" + str(pr_num) + "/head"
      os.system(git_fetch_pr)
   
      #checkout
      git_checkout = "git checkout -b " + "pull" + str(pr_num) + " FETCH_HEAD"
      os.system(git_checkout)
   
      #update submodule
      git_update_submodule = "git submodule update --init --force"
      os.system(git_update_submodule)
  
      # Generate binding glue codes
      if(branch == 'develop'):
        if(platform.system() == 'Darwin'):
          os.system("tools/jenkins-scripts/gen_jsb.sh")
        elif(platform.system() == 'Windows'):
          os.chdir("tools/jenkins-scripts")
          os.system("gen_jsb_win32.bat")
          os.chdir("../..")
  
      #make temp dir
      print "current dir is" + os.environ['WORKSPACE']
      os.system("cd " + os.environ['WORKSPACE']);
      os.mkdir("android_build_objs")
      #add symbol link
      PROJECTS=["Cpp/HelloCpp","Cpp/TestCpp","Cpp/SimpleGame","Cpp/AssetsManagerTest",
              "Javascript/TestJavascript","Javascript/CocosDragonJS","Javascript/CrystalCraze",
              "Javascript/MoonWarriors","Javascript/WatermelonWithMe","Lua/HelloLua","Lua/TestLua"]
      print platform.system()
      if(platform.system() == 'Darwin'):
          for item in PROJECTS:
            cmd = "ln -s " + os.environ['WORKSPACE']+"/android_build_objs/ " + os.environ['WORKSPACE']+"/samples/"+item+"/proj.android/obj"  
            os.system(cmd)
      elif(platform.system() == 'Windows'):
          for item in PROJECTS:
            p = item.replace("/", os.sep)
            cmd = "mklink /J "+os.environ['WORKSPACE']+os.sep+"samples"+os.sep +p+os.sep+"proj.android"+os.sep+"obj " + os.environ['WORKSPACE']+os.sep+"android_build_objs"
            print cmd
            os.system(cmd)
   
      #build
      #TODO: support android-mac build currently
      #TODO: add android-windows7 build
      #TODO: add android-linux build
      #TODO: add ios build
      #TODO: add mac build
      #TODO: add win32 build
      node_name = os.environ['NODE_NAME']
      if(branch == 'develop'):
        if(node_name == 'android_mac') or (node_name == 'android_win7'):
          ret = os.system("python build/android-build.py -n -j10 all")
        elif(node_name == 'win32_win7'):
          ret = subprocess.call('"%VS110COMNTOOLS%..\IDE\devenv.com" "build\cocos2d-win32.vc2012.sln" /Build "Debug|Win32"', shell=True)
      elif(branch == 'master'):
        if(platform.system() == 'Darwin'):
          ret = os.system("samples/Cpp/TestCpp/proj.android/build_native.sh")
        else:
          ret = 0
  
      #get build result
      print "build finished and return " + str(ret)
      
      exit_code = 1
      if ret == 0:
          exit_code = 0
      else:
          exit_code = 1
      
      #clean workspace
      os.system("cd " + os.environ['WORKSPACE']);
      os.system("git checkout develop")
      os.system("git branch -D pull" + str(pr_num))
  
      return(exit_code)
  
  # -------------- main --------------
  if __name__ == '__main__':
      sys_ret = 0
      try:    
          sys_ret = main()
      except:
          traceback.print_exc()
          sys_ret = 1
      finally:
          sys.exit(sys_ret)
  