[SOLVED] Installing Gem into ChefDK via Chef

Installing Gem into ChefDK via Chef

I want to install a Gem (kitchen-docker) into ChefDK's Gem path.

What is the best way to install this Gem via Chef itself? Is there a more clever solution than the following?

execute "chef gem install kitchen-docker" do
  user "jenkins"
  not_if "chef gem list | grep ^kitchen-docker"
end

Some background information: I want to use ChefDK in Jenkins on our CI server to do cookbook testing. The CI server itself should be provisioned by Chef, of course.

Solution

Apparently, in order to install a chef gem system-wide (into /opt/chefdk/), the parameter --no-user-install of the gem command can be used through the gem_package resource:

gem_package "kitchen-docker" do
  gem_binary "/opt/chefdk/embedded/bin/gem"
  options "--no-user-install"
end

This installs the gem and makes it available to all users running chefdk on the system.