Clearing sources works for string options

lib/chef/provider/package/rubygems.rb

@@ -538,8 +538,9 @@ def gem_binary_path
         def install_via_gem_command(name, version)
           if @new_resource.source =~ /\.gem$/i
             name = @new_resource.source
-#          elsif source_is_remote?
-#            src = @new_resource.source && "  --source=#{@new_resource.source}"
+          elsif @new_resource.clear_sources
+            src = ' --clear-sources'
+            src << (@new_resource.source && " --source=#{@new_resource.source}" || '')
           else
             src = @new_resource.source && " --source=#{@new_resource.source} --source=https://rubygems.org"
           end

lib/chef/resource/gem_package.rb

@@ -27,12 +27,17 @@ class GemPackage < Chef::Resource::Package
       def initialize(name, run_context=nil)
         super
         @resource_name = :gem_package
+        @clear_sources = false
       end
 
       def source(arg=nil)
         set_or_return(:source, arg, :kind_of => [ String, Array ])
       end
 
+      def clear_sources(arg=nil)
+        set_or_return(:clear_sources, arg, :kind_of => [ TrueClass, FalseClass ])
+      end
+
       # Sets a custom gem_binary to run for gem commands.
       def gem_binary(gem_cmd=nil)
         set_or_return(:gem_binary,gem_cmd,:kind_of => [ String ])

spec/unit/provider/package/rubygems_spec.rb

@@ -556,6 +556,16 @@ def gemspec(name, version)
           expect(@new_resource).to be_updated_by_last_action
         end
 
+        it "installs the gem with cleared sources and explict source when specified" do
+          @new_resource.gem_binary('/foo/bar')
+          @new_resource.source('http://mirror.ops.rhcloud.com/mirror/ruby')
+          @new_resource.clear_sources(true)
+          expected ="/foo/bar install rspec-core -q --no-rdoc --no-ri -v \"#{@spec_version}\" --clear-sources --source=#{@new_resource.source}"
+          expect(@provider).to receive(:shell_out!).with(expected, :env => nil)
+          @provider.run_action(:install)
+          expect(@new_resource).to be_updated_by_last_action
+        end
+
         context "when no version is given" do
           let(:target_version) { nil }