From: Ronnie Sahlberg <sahlberg@google.com>
Date: Mon, 19 May 2014 17:42:34 +0000 (-0700)
Subject: refs.c: make ref_transaction_begin take an err argument
X-Git-Tag: v2.2.0-rc0~139^2~19
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/93a644ea9d3702cc1cc62c0d413f81f8e46fabe7?hp=93a644ea9d3702cc1cc62c0d413f81f8e46fabe7

refs.c: make ref_transaction_begin take an err argument

Add an err argument to _begin so that on non-fatal failures in future ref
backends we can report a nice error back to the caller.
While _begin can currently never fail for other reasons than OOM, in which
case we die() anyway, we may add other types of backends in the future.
For example, a hypothetical MySQL backend could fail in _begin with
"Can not connect to MySQL server. No route to host".

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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