Made my them display the current rvm gemset and check for detached head

state in git.

themes/Soliah.zsh-theme

-PROMPT='%{$fg[blue]%}%n%{$reset_color%} on %{$fg[red]%}%M%{$reset_color%} in %{$fg[blue]%}%~%b%{$reset_color%}$(git_time_since_commit)$(git_prompt_info)
+PROMPT='%{$fg[blue]%}%n%{$reset_color%} on %{$fg[red]%}%M%{$reset_color%} in %{$fg[blue]%}%~%b%{$reset_color%}$(git_time_since_commit)$(check_git_prompt_info)
 $ '
 
 ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg[white]%}"
@@ -16,6 +16,29 @@ ZSH_THEME_GIT_TIME_SHORT_COMMIT_MEDIUM="%{$fg[yellow]%}"
 ZSH_THEME_GIT_TIME_SINCE_COMMIT_LONG="%{$fg[red]%}"
 ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL="%{$fg[cyan]%}"
 
+
+# Git sometimes goes into a detached head state. git_prompt_info doesn't
+# return anything in this case. So wrap it in another function and check
+# for an empty string.
+function check_git_prompt_info() {
+    if git rev-parse --git-dir > /dev/null 2>&1; then
+        if [[ -z $(git_prompt_info) ]]; then
+            echo "%{$fg[magenta]%}detached-head%{$reset_color%})"
+        else
+            echo "$(git_prompt_info)"
+        fi
+    fi
+}
+
+# Determine if we are using a gemset.
+function rvm_gemset() {
+    GEMSET=`rvm gemset list | grep '=>' | cut -b4-`
+    if [[ -n $GEMSET ]]; then
+        echo "%{$fg[yellow]%}$GEMSET%{$reset_color%}|"
+    fi 
+
+}
+
 # Determine the time since last commit. If branch is clean,
 # use a neutral color, otherwise colors will vary according to time.
 function git_time_since_commit() {
@@ -49,15 +72,15 @@ function git_time_since_commit() {
             fi
 
             if [ "$HOURS" -gt 24 ]; then
-                echo "($COLOR${DAYS}d${SUB_HOURS}h${SUB_MINUTES}m%{$reset_color%}|"
+                echo "($(rvm_gemset)$COLOR${DAYS}d${SUB_HOURS}h${SUB_MINUTES}m%{$reset_color%}|"
             elif [ "$MINUTES" -gt 60 ]; then
-                echo "($COLOR${HOURS}h${SUB_MINUTES}m%{$reset_color%}|"
+                echo "($(rvm_gemset)$COLOR${HOURS}h${SUB_MINUTES}m%{$reset_color%}|"
             else
-                echo "($COLOR${MINUTES}m%{$reset_color%}|"
+                echo "($(rvm_gemset)$COLOR${MINUTES}m%{$reset_color%}|"
             fi
         else
             COLOR="$ZSH_THEME_GIT_TIME_SINCE_COMMIT_NEUTRAL"
-            echo "($COLOR~|"
+            echo "($(rvm_gemset)$COLOR~|"
         fi
     fi
 }