cookbook_version root_dir in library

Question

I have a custom library and want to access the current cookbook from the cookbook_collection in the run_context, but it seems to be coming back null

I have

Chef::Log.info run_context.cookbook_collection['my_cookbook']

It prints

#<Chef::CookbookVersion:0x00000004d3f578>

But if I do

Chef::Log.info run_context.cookbook_collection['my_cookbook'].root_dir

where my_cookbook is the name of the current cookbook, I get nothing printed. How can I access the root_dir of the current_cookbook from my library?

Answer 1

Copying down from the comment:

That is not supported and will break in some releases. Use a cookbook_file resource first to copy it out to known location. This might mean your library helper code needs to be become a DSL extension or custom resource instead.