github plugin: check for `ruby`.

I've run into the issue where a stripped down container had no Ruby installed, which caused `hub` to fail. Therefore I've added an extra check to verify that `ruby` is in the commands list before setting up this alias/function.

github plugin: check for `ruby`.
911837c4 · Daniel Hahler · 971b071d · 911837c4
Commit 911837c4 authored Apr 12, 2011 by Daniel Hahler
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github.plugin.zsh plugins/github/github.plugin.zsh +2 -3

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--- a/plugins/github/github.plugin.zsh
+++ b/plugins/github/github.plugin.zsh
-# hub alias from defunkt
-# https://github.com/defunkt/hub
-if [ "$commands[(I)hub]" ]; then
+# Setup hub function for git, if it is available; http://github.com/defunkt/hub
+if [ "$commands[(I)hub]" ] && [ "$commands[(I)ruby]" ]; then
    # eval `hub alias -s zsh`
    function git(){hub "$@"}
 fi