From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 01 Aug 2016 20:37:52 GMT
Subject: Re: [PATCH v9 33/41] environment: add set_index_file()
Message-ID: <xmqqlh0gi5sv.fsf@gitster.mtv.corp.google.com>
In-Reply-To: <CAGZ79kYzxCq6M49Zmf_4J7xTdXHMunvgPuFaLnV7fXtuTbEogQ@mail.gmail.com>

Stefan Beller <sbeller@google.com> writes:

> In cache.h we have a NO_THE_INDEX_COMPATIBILITY_MACROS,
> and lots of
>   #define foo_bar(..) frob_bar(&the_index, (..))
>
> Could you operate on the raw functions that take pointers to &the_index
> and point these to a temporary index?

Isn't mention of the_index is a red-herring?

The in-core index_state does not even know what file it needs to be
written to, so whether you explicitly specify your own index or use
the compat macros to access the_index, you would need to specify to
which file you would write it out or from which file you would read
the new contents.