From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 1 Jun 2017 04:38:16 +0000 (+0900)
Subject: diff- and log- family: handle "git cmd -h" early
X-Git-Tag: v2.14.0-rc0~84^2~3
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/5a88f97cff0f269f8b2069b17c9da05ee66c98bb?hp=5a88f97cff0f269f8b2069b17c9da05ee66c98bb

diff- and log- family: handle "git cmd -h" early

"git $builtin -h" bypasses the usual repository setup and calls the
cmd_$builtin() function, expecting it to show the help text.

Unfortunately the commands in the log- and the diff- family want to
call into the revisions machinery, which by definition needs to have
a repository already discovered.  Strictly speaking, they may not
need a repository only for parsing "-h", but it is a good discipline
to future-proof codepath to ensure that setup_revisions() is called
after we know that a repository is there.

Handle the "git $builtin -h" special case very early in these
commands to work around potential issues.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
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