From: Jonathan Nieder <jrnieder@gmail.com>
Date: Wed, 16 Mar 2011 07:14:11 +0000 (-0500)
Subject: diff --submodule: split into bite-sized pieces
X-Git-Tag: v1.7.4.2~29
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/808a95dcad957ce00dc6fde7cf7f53ca32200c34?ds=inline;hp=808a95dcad957ce00dc6fde7cf7f53ca32200c34

diff --submodule: split into bite-sized pieces

Introduce two functions:

- prepare_submodule_summary prepares the revision walker
to list changes in a submodule.  That is, it:

* finds merge bases between the commits pointed to this
path from before ("left") and after ("right") the change;
* checks whether this is a fast-forward or fast-backward;
* prepares a revision walk to list commits in the symmetric
difference between the commits at each endpoint.

It returns nonzero on error.

- print_submodule_summary runs the revision walk and saves
the result to a strbuf in --left-right format.

The goal is just readability.  No functional change intended.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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