bundle install not running from my post-update hook - ruby-on-rails

Question

I've setup a post-update hook for my project. I have a bare repository (/var/git/myproject) which I push to, and a live repository (/var/www/myproject) where my app is running. I also included bundle install and bundle exec rake db:migrate to install gems and update db.
Below is my post-update hook
#!/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
When I push my changes though I get the following message (notice the "bundle command not found" error):
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.
Why is bundle not running? I cd to the live app directory in the script. When I'm in terminal myself and I cd to the live directory and run bundle install it works so bundle is there.

Answer 1

Your hook shell ins't the same than the one you logged in (and which has the proper PATH)
You can try using at the beginning your your hook script:
#!/bin/bash -l
(See this answer
The -l parameter executes the command in a login shell, which means that it inherits your path and other settings from your shell profile.
)
Or you can make sure your script gets the same environment than your current session, by adding in the first lines of your hook:
$ source $HOME/.bash_profile # single user RVM setup
$ source /etc/profile # multi user RVM setup
Or (final alternative) you can add (before calling bundle) (for a single-user rvm installation)
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"