From fc3a3c72b17c0e12ea85094cd8b2575ccf1f2d44 Mon Sep 17 00:00:00 2001
From: Robby Russell <robby@planetargon.com>
Date: Sun, 8 Nov 2009 15:34:02 -0800
Subject: [PATCH] Only using the contents of .ssh/known_hosts when the file
 exists for ssh/scp auto-completion. Closes issue #20

---
 lib/completion.zsh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/completion.zsh b/lib/completion.zsh
index deeb52824..c231ee21e 100644
--- a/lib/completion.zsh
+++ b/lib/completion.zsh
@@ -22,7 +22,7 @@ else
 fi
 
 zstyle ':completion:*' list-colors ''
-zstyle ':completion:*' hosts $( sed 's/[, ].*$//' $HOME/.ssh/known_hosts )
+
 
 unsetopt MENU_COMPLETE
 #setopt AUTO_MENU
@@ -35,7 +35,12 @@ zstyle ':completion:*:*:*:*:*' menu yes select
 
 zstyle ':completion:*:*:kill:*:processes' list-colors '=(#b) #([0-9]#) ([0-9a-z-]#)*=01;34=0=01'
 zstyle ':completion:*:*:*:*:processes' command "ps -u `whoami` -o pid,user,comm -w -w"
-zstyle ':completion:*:*:(ssh|scp):*:*' hosts `sed 's/^\([^ ,]*\).*$/\1/' ~/.ssh/known_hosts`
+
+# Load known hosts file for auto-completion with ssh and scp commands
+if [ -f ~/.ssh/known_hosts ]; then
+  zstyle ':completion:*' hosts $( sed 's/[, ].*$//' $HOME/.ssh/known_hosts )
+  zstyle ':completion:*:*:(ssh|scp):*:*' hosts `sed 's/^\([^ ,]*\).*$/\1/' ~/.ssh/known_hosts`
+fi
 
 # Complete on history
 # zstyle ':completion:*:history-words' stop yes