Add RPS1 support to fresh prompt theme

* Python virtualenv name
* Docker machine name

prompt_fresh_setup

@@ -19,7 +19,7 @@ prompt_fresh_setup() {
   PS1="«$user» "
   PS2="${(l:$length + 1:: :)}» "
 
-  # TODO: RPS1
+  RPS1='$(fresh_rprompt)'
 
   prompt_opts=(cr percent sp subst)
 }
@@ -104,6 +104,17 @@ fresh_precmd() {
   fi
 }
 
+fresh_rprompt() {
+  rprompt=""
+  if [[ ! -z "$DOCKER_MACHINE_NAME" ]]; then
+    rprompt="$rprompt %{%F{3}%}$DOCKER_MACHINE_NAME%{%f%}"
+  fi
+  if [[ ! -z "$VIRTUAL_ENV" ]]; then
+    rprompt="$rprompt %{%F{3}%}$(basename $VIRTUAL_ENV)%{%f%}"
+  fi
+  echo $rprompt
+}
+
 visible_length() {
   echo $(( ${#${(S%%)1//(\%(KF1]|)\{*\}|\%[Bbkf])}} ))
 }