Gitlab post接收钩子不'；行不通

我正在为本地托管在我的服务器上的gitlab上的项目使用自定义_钩子。下面是一段代码（我想在每次提交到存储库时将代码部署到特定文件夹）：

我已经做了：

1） 将自定义钩子所有者更改为git

2） 将post接收文件所有者更改为git，并使其可执行

3） 改变目的地。文件夹所有者，并授予此文件夹的777权限

但是，当我试图承诺时，什么都没有发生

#!/opt/gitlab/embedded/bin/ruby
# Fix the PATH so that gitlab-shell can find git-upload-pack and friends.
ENV['PATH'] = '/opt/gitlab/bin:/opt/gitlab/embedded/bin:' + ENV['PATH']
#!/usr/bin/env ruby


# This file was placed here by GitLab. It makes sure that your pushed commits
# will be processed properly.


# 1. Read STDIN (Format: "from_commit to_commit branch_name")
from, to, branch = ARGF.read.split " "

# 2. Only deploy if master branch was pushed
if (branch =~ /master$/) == nil
    # puts "Received branch #{branch}, not deploying."
    exit
end

# 3. Copy files to deploy directory
deploy_to_dir = File.expand_path('/etc/*specific folder*')
`GIT_WORK_TREE="#{deploy_to_dir}" git checkout -f master`
# puts "DEPLOY: master(#{to}) copied to '#{deploy_to_dir}'"

# 4.TODO: Deployment Tasks
# i.e.: Run Puppet Apply, Restart Daemons, etc