chef install Policyfile.rb cannot resolve cookbook-specific source of supermarket

Description

If the Policyfile default_source for cookbooks is set to a local folder, this cannot be overridden using a cookbook-specific source as specified by public supermarket for example Supermarket chef-dk cookbook page:.

ChefDK Version

Chef Development Kit Version: 1.2.22
chef-client version: 12.18.31

Platform Version

Ubuntu 16.04.1 LTS (xenial)

Replication Case

chef generate repo test
cd test
gedit Policyfile.rb

name 'policyfile'
run_list 'example::default'
default_source :chef_repo, '.'
cookbook 'example'
cookbook 'chef-dk', '~> 3.1.0', :supermarket

chef install -D

Stacktrace

Building policy policyfile
Expanded run list: recipe[example::default]
Caching Cookbooks...
Error: Failed to generate Policyfile.lock
Reason: (Solve::Errors::NoSolutionError) Unable to satisfy the following requirements:

• chef-dk (~> 3.1.0) required by user-specified dependency

/opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:197:in rescue in resolve_with_error_wrapping' /opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:195:in resolve_with_error_wrapping'
/opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve/ruby_solver.rb:75:in resolve' /opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/solve-3.1.0/lib/solve.rb:64:in it!'
/opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/policyfile_compiler.rb:182:in graph_solution' /opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/policyfile_compiler.rb:127:in install'
/opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/policyfile_services/install.rb:98:in generate_lock_and_install' /opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/policyfile_services/install.rb:62:in run'
/opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/command/install.rb:78:in run' /opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/command/base.rb:58:in run_with_default_options'
/opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/lib/chef-dk/cli.rb:73:in run' /opt/chefdk/embedded/lib/ruby/gems/2.3.0/gems/chef-dk-1.2.22/bin/chef:25:in <top (required)>'
/usr/bin/chef:81:in load' /usr/bin/chef:81:in

Reproduce the case with chef generate repo test and chef install -D, then inspect the Policyfile compiler and install paths named in the stack trace, especially policyfile_compiler.rb, policyfile_services/install.rb, and solve/ruby_solver.rb. Done means a local default_source can be overridden for chef-dk by its supermarket source and Policyfile.lock is generated successfully.