Helpers
Helper classes enable users to share code between Custom Resources. Rspec method test are possible when code is abstracted into plain Ruby files.
Example
To include the following helper from libraries/helpers.rb
#libraries/helpers.rb
module Haproxy
module cookbook
module ResourceHelpers
def haproxy_version
version = Mixlib::ShellOut.new("haproxy -v | grep version | awk '{ print $3 }'")
version.run_command.stdout.to_f
end
end
end
end
Within a Custom Resource file, use the include directive in the action_class, to include all methods in the specified module.
action_class do
include Haproxy::Cookbook::ResourceHelpers
end
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https://docs.chef.io/helpers/
