捆绑安装没有从我的更新后挂钩运行

我为我的项目设置了更新后的挂钩.我有一个裸存储库(/ var/git/myproject),我推送到这个存储库,以及我的应用程序运行的实时存储库(/ var/www/myproject).我还包括bundle install并bundle exec rake db:migrate安装gems和更新db.

下面是我的更新后挂钩

#!/bin/bash

echo "Pulling changes into Live..."
cd /var/www/myproject || exit
unset GIT_DIR
git pull origin master

# check if ruby app
if [ -f /var/www/myproject/Gemfile ];
then
  echo "  Ruby app detected..."
  bundle install --without development test
  bundle exec rake db:migrate # migrate database
fi

exec git-update-server-info

当我推送我的更改时,我收到以下消息(请注意"未找到捆绑命令"错误):

martyn@localhost:~/www/myproject$ git push -u origin master
martyn@192.168.0.100's password: 
Counting objects: 832, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (783/783), done.
Writing objects: 100% (832/832), 487.70 KiB, done.
Total 832 (delta 434), reused 0 (delta 0)
remote: Pulling changes into Live...
remote: From /var/git/myproject
remote:  * branch            master     -> FETCH_HEAD
remote: Ruby app detected...
remote: hooks/post-update: line 13: bundle: command not found
remote: hooks/post-update: line 14: bundle: command not found
To 192.168.24.100:/var/git/myproject.git
 * [new branch]      master -> master
Branch master set up to track remote branch master from origin.

为什么捆绑没有运行？我cd到脚本中的live app目录.当我在终端自己和我cd到实时目录并运行bundle install它工作所以捆绑就在那里.