将代码从Bitbucket部署到EC2

我使用BitBucket为我的Django项目和EC2云服务器。我的目标是，当我向分支推送提交时，BitBucket将对钩子进行调用，钩子将更新EC2中的代码。

到目前为止，当我提交时，钩子被调用，但代码没有在服务器上更新。在我的理解中，这与Linux/Ubuntu 14.04中的权限有关。

我试着跟随Brandon Summers的链接，并在这里进一步完善。但它仍然不起作用。

对于第一个链接，我在日志中得到这个:

fatal: Not a git repository (or any of the parent directories): .git
fatal: Not a git repository (or any of the parent directories): .git
chmod: cannot access '.git': No such file or directory
[Thu Jul 30 18:21:05.106127 2015] [:error] [pid 9736] [client 131.103.20.165:42727] PHP Notice:  Undefined property: Deploy::$_data in /var/www/html/deploy_home.php on line 127

第二个链接在控制台给了我这个:

[Sat Aug 01 15:26:35.000824 2015] [:error] [pid 2447] [client 131.103.20.165:39102] PHP Warning:  file_put_contents(/var/log/deploy/deployments.log): failed to open stream: No such file or directory in /var/www/html/deploy_repo.php on line 144
[Sat Aug 01 15:26:35.000869 2015] [:error] [pid 2447] [client 131.103.20.165:39102] PHP Warning:  chmod(): No such file or directory in /var/www/html/deploy_repo.php on line 147
[Sat Aug 01 15:26:35.000924 2015] [:error] [pid 2447] [client 131.103.20.165:39102] PHP Warning:  file_put_contents(/var/log/deploy/deployments.log): failed to open stream: No such file or directory in /var/www/html/deploy_repo.php on line 152
[Sat Aug 01 15:26:35.001010 2015] [:error] [pid 2447] [client 131.103.20.165:39102] PHP Warning:  file_put_contents(/var/log/deploy/deployments.log): failed to open stream: No such file or directory in /var/www/html/deploy_repo.php on line 144
[Sat Aug 01 15:26:35.001034 2015] [:error] [pid 2447] [client 131.103.20.165:39102] PHP Warning:  chmod(): No such file or directory in /var/www/html/deploy_repo.php on line 147
[Sat Aug 01 15:26:35.001068 2015] [:error] [pid 2447] [client 131.103.20.165:39102] PHP Warning:  file_put_contents(/var/log/deploy/deployments.log): failed to open stream: No such file or directory in /var/www/html/deploy_repo.php on line 152
sh: 1: /usr/sbin/sendmail: not found

第二个链接的控制台输出与无法写入日志文件有关，但在EC2上repo文件夹仍然保持不变。

我在这里错过了什么?

 private $_repositoryIp = array ( '63.246.22.222');