Implement Remote#config:

Load SSH configuration for targeted host name.

lib/producer/core/remote.rb

@@ -14,6 +14,10 @@ module Producer
         @session ||= Net::SSH.start(@hostname, user_name)
       end
 
+      def config
+        @config ||= Net::SSH::Config.for(@hostname)
+      end
+
       def user_name
         Etc.getlogin
       end

spec/producer/core/remote_spec.rb

@@ -29,6 +29,24 @@ module Producer::Core
       end
     end
 
+    describe '#config' do
+      it 'builds a config for current host name' do
+        expect(Net::SSH::Config).to receive(:for).with(hostname)
+        remote.config
+      end
+
+      it 'returns the config' do
+        ssh_config = double('ssh config')
+        allow(Net::SSH::Config).to receive(:for) { ssh_config }
+        expect(remote.config).to be ssh_config
+      end
+
+      it 'memoizes the config' do
+        allow(Net::SSH::Config).to receive(:for) { Object.new }
+        expect(remote.config).to be remote.config
+      end
+    end
+
     describe '#user_name' do
       it 'returns the name of the user currently logged in' do
         expect(remote.user_name).to eq Etc.getlogin