From 8053deda7508b36443f1b57dad1f295dfa60959f Mon Sep 17 00:00:00 2001
From: rupa <rupa@lrrr.us>
Date: Tue, 30 Jul 2013 10:23:34 -0400
Subject: [PATCH] Avoid duplicate precmd functions in zsh

Hat tip @knu ... closes #110
---
 z.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/z.sh b/z.sh
index 81eff88..a1cd175 100644
--- a/z.sh
+++ b/z.sh
@@ -218,7 +218,9 @@ if compctl >/dev/null 2>&1; then
                 _z --add "${PWD:A}"
             }
         fi
-        precmd_functions+=(_z_precmd)
+        [[ -n "${precmd_functions[(r)_z_precmd]}" ]] || {
+            precmd_functions+=(_z_precmd)
+        }
     }
     _z_zsh_tab_completion() {
         # tab completion