From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Epler <jepler@unpythonic.net>
Subject: Re: determine if the tree is dirty
Date: Tue, 3 Nov 2009 13:06:19 -0600
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To: Adam Mercer <ramercer@gmail.com>
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On Tue, Nov 03, 2009 at 12:57:37PM -0600, Adam Mercer wrote:
> As part of a python script I need to determine if a tree has any
> uncommitted changes

GIT-VERSION-GEN uses something like this (shell script):
        git update-index -q --refresh
        test -z "$(git diff-index --name-only HEAD --)" || VN="$VN-dirty" ;;

Jeff