From: Jeff King <peff@peff.net>
Date: Fri, 24 Feb 2012 22:02:37 +0000 (-0500)
Subject: teach convert_to_git a "dry run" mode
X-Git-Tag: v1.7.9.3~8^2~2
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/92ac3197e4859ba8c19e3e7f7b8cf5dc38e4669d?ds=inline;hp=92ac3197e4859ba8c19e3e7f7b8cf5dc38e4669d

teach convert_to_git a "dry run" mode

Some callers may want to know whether convert_to_git will
actually do anything before performing the conversion
itself (e.g., to decide whether to stream or handle blobs
in-core). This patch lets callers specify the dry run mode
by passing a NULL destination buffer. The return value,
instead of indicating whether conversion happened, will
indicate whether conversion would occur.

For readability, we also include a wrapper function which
makes it more obvious we are not actually performing the
conversion.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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