Update to use puppetcore puppet and facter

This change
*  Introduces a change to the Gemfile that enables a "switch" on PUPPET_AUTH_TOKEN environment variable.  In other words, when not-set, then all gem dependencies will be resolved from https://rubygems.org.  If set, then puppet and facter will be resolved from the https://rubygems-puppetcore.puppet.com

This commit enables the peadm development team to test its functionality using the puppetcore puppet and facter gems.

the  Signed-off-by: Gavin Didrichsen <gavin.didrichsen@gmail.com>

Author: gavindidrichsen

Gemfile

@@ -49,18 +49,21 @@ group :release_prep do
   gem "puppetlabs_spec_helper", '~> 6.0', require: false
 end
 
-puppet_version = ENV['PUPPET_GEM_VERSION']
-facter_version = ENV['FACTER_GEM_VERSION']
-hiera_version = ENV['HIERA_GEM_VERSION']
-
 gems = {}
+puppet_version = ENV.fetch('PUPPET_GEM_VERSION', nil)
+facter_version = ENV.fetch('FACTER_GEM_VERSION', nil)
+hiera_version = ENV.fetch('HIERA_GEM_VERSION', nil)
 
-gems['puppet'] = location_for(puppet_version)
-
-# If facter or hiera versions have been specified via the environment
-# variables
+# If PUPPET_AUTH_TOKEN is set then use authenticated source for both puppet and facter, since facter is a transitive dependency of puppet
+# Otherwise, do as before and use location_for to fetch gems from the default source
+if !ENV['PUPPET_AUTH_TOKEN'].to_s.empty?
+  gems['puppet'] = [puppet_version || '~> 8.11', { require: false, source: 'https://rubygems-puppetcore.puppet.com' }]
+  gems['facter'] = [facter_version || '~> 4.0', { require: false, source: 'https://rubygems-puppetcore.puppet.com' }]
+else
+  gems['puppet'] = location_for(puppet_version)
+  gems['facter'] = location_for(facter_version) if facter_version
+end
 
-gems['facter'] = location_for(facter_version) if facter_version
 gems['hiera'] = location_for(hiera_version) if hiera_version
 
 gems.each do |gem_name, gem_params|