add hostname prefix via MYHOSTEXPRESSION

prompt.zsh

@@ -56,6 +56,20 @@ function promptSetup () {
     CURRENT_USER=`whoami`
     PR_SIGN=$NOCOLOR
     PR_SIGN+="%F{160}%B"
+
+    # prepend the hostname if we are outside
+    if [[ "$MYHOSTEXPRESSION" == "" ]]; then
+        # if not set, home is nowhere
+        MYHOSTEXPRESSION="^$"
+    fi
+    if [[ "`hostname`" =~ "$MYHOSTEXPRESSION" ]]; then
+        # we are on our home desktop
+    else
+        # we are outside on a server
+        PR_SIGN+="`hostname` "
+    fi
+
+    # setup the main sign
     if [[ $CURRENT_USER == 'root' ]]; then
         PR_SIGN+="☠"
     elif [[ $CURRENT_USER == 'vagrant' ]]; then
@@ -63,7 +77,7 @@ function promptSetup () {
     else
         PR_SIGN+="∴"
     fi
-    #PR_SIGN+=%(#."☠".'∴')
+
     PR_SIGN+="%F{white}%b"