From: John Keeping <john@keeping.me.uk>
Date: Sat, 5 Sep 2015 13:12:49 +0000 (+0100)
Subject: test-lib-functions: detect test_when_finished in subshell
X-Git-Tag: v2.7.0-rc0~138^2
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/0968f12a99c4ac784b6b7f858003662cfaae117f?ds=sidebyside;hp=0968f12a99c4ac784b6b7f858003662cfaae117f

test-lib-functions: detect test_when_finished in subshell

test_when_finished does nothing in a subshell because the change to
test_cleanup does not affect the parent.

There is no POSIX way to detect that we are in a subshell ($$ and $PPID
are specified to remain unchanged), but we can detect it on Bash and
fall back to ignoring the bug on other shells.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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