From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: How to use git attributes to configure server-side checks?
Date: Fri, 17 Feb 2012 11:59:55 -0800
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Cc: Michael Haggerty <mhagger@alum.mit.edu>,
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Junio C Hamano <gitster@pobox.com> writes:

> Michael Haggerty <mhagger@alum.mit.edu> writes:
>
>> I was just alerted by Scott Chacon's blog [1] to the fact that one can
>> set GIT_INDEX_FILE to an arbitrary filename, thereby causing the index
>> to be read/written from that file instead of $GIT_DIR/index.
>
> That's very old fashioned.  For almost five years, the preferred way to
> say that has been "git read-tree --index-output=file" ;-)

Ah, I take that back.

There is any benefit to be had by using "read-tree --index-output" in the
way used in your check-attr example.  Setting up a single GIT_INDEX_FILE
and using it throughout as you did is indeed much more preferrable.

> But what you outlined should work.