chef generate fails with code_generator from Chef

[zmaupin]

Version:

 $ chef --version
ChefDK version: 4.4.1
Chef Infra Client version: 15.2.20
Chef InSpec version: 4.12.0
Test Kitchen version: 2.2.5
Foodcritic version: 16.1.1
Cookstyle version: 5.2.17

Environment:

macOS Mojave 10.14.6
Downloaded the code_generator from https://github.com/chef/chef-dk/tree/master/lib/chef-dk/skeletons/code_generator
I also tried using https://github.com/chef/chef-dk/tree/master/lib/chef-dk/skeletons/code_generator with the same errors.

Scenario:

I want to use chef generate cookbook my_cookbook -g code_generator/

Steps to Reproduce:

• Build the code_generator with chef generate generator
• Try to use the code_generator cookbook to generate a new cookbook chef generate cookbook my_cookbook -g code_generator/

Expected Result:

I expected a new cookbook built with the generator cookbook.

Actual Result:

 $ chef generate cookbook testcookbook1 -b -g code_generator/
Generating cookbook testcookbook1
- Ensuring correct cookbook content
[2019-09-12T10:57:56-04:00] WARN: Found a directory testcookbook1 in the cookbook path, but it contains no cookbook files. skipping.

================================================================================
Error executing action `create_if_missing` on resource 'template[/Users/zm/github/infraconfig/testcookbook1/metadata.rb]'
================================================================================

NoMethodError
-------------
undefined method `metadata' for nil:NilClass

Resource Declaration:
---------------------
# In /Users/zm/github/infraconfig/code_generator/recipes/cookbook.rb

 25: template "#{cookbook_dir}/metadata.rb" do
 26:   helpers(ChefDK::Generator::TemplateHelper)
 27:   variables(
 28:     spdx_license: spdx_license
 29:   )
 30:   action :create_if_missing
 31: end
 32:

Compiled Resource:
------------------
# Declared in /Users/zm/github/infraconfig/code_generator/recipes/cookbook.rb:25:in `from_file'

template("/Users/zm/github/infraconfig/testcookbook1/metadata.rb") do
  action [:create_if_missing]
  default_guard_interpreter :default
  source "metadata.rb.erb"
  helper_modules [ChefDK::Generator::TemplateHelper]
  declared_type :template
  cookbook_name :code_generator
  recipe_name "cookbook"
  variables {:spdx_license=>"All Rights Reserved"}
  path "/Users/zm/github/infraconfig/testcookbook1/metadata.rb"
  owner nil
  group nil
  mode nil
  verifications []
end

System Info:
------------
chef_version=15.2.20
ruby=ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-darwin16]
program_name=/usr/local/bin/chef
executable=/opt/chefdk/bin/chef

ERROR: Chef Infra failed to converge: template[/Users/zm/github/infraconfig/testcookbook1/metadata.rb] (code_generator::cookbook line 25) had an error: NoMethodError: undefined method `metadata' for nil:NilClass from file /opt/chefdk/embedded/lib/ruby/gems/2.6.0/gems/chef-15.2.20/lib/chef/cookbook_loader.rb:99:in `load_cookbook'
Caused by: (NoMethodError) template[/Users/zm/github/infraconfig/testcookbook1/metadata.rb] (code_generator::cookbook line 25) had an error: NoMethodError: undefined method `metadata' for nil:NilClass

[zmaupin]

dupe of #8