Custom git completion

[David Rhodes Clymer <david@zettazebra.com>]

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Unless I read it incorrectly, the completion script included with
git-core does not make it easy for users to write completion scripts
for custom git commands. I can extend git itself by creating a command
"git-foo", and placing it in my path. The command can then be used
like so: "git foo". However, if I want to add command completion for
that command without modifying (I may not have permission) or
duplicating the system git completion, I can't write a completion
script which matches works on "git foo", only "git-foo", which is not
how I would ever call the script.

Anyway, so I made a simple modification which looks for completion
code for custom commands, and calls that as appropriate. If the
attached patch (or something like it) were applied to the git
completion script, it would be awfully handy.

-davidc

ps. I'm not subscribed to the list, so please copy me on any replies, thanks!

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--- /etc/bash_completion.d/git.orig	2010-01-12 14:50:16.000000000 -0500
+++ /etc/bash_completion.d/git	2010-01-12 15:28:27.000000000 -0500
@@ -1403,7 +1403,10 @@
 	svn)         _git_svn ;;
 	tag)         _git_tag ;;
 	whatchanged) _git_log ;;
-	*)           COMPREPLY=() ;;
+	*)
+    COMPREPLY=()
+    $(complete -p |awk '/ '"git-${command}"'$/{print $(NF-1)}')
+  ;;
 	esac
 }