tree 08850034e0df462aab65fc69cd4b36bed6048256
parent f17a5d34948363087db94a1cb2c3c715c1ada2d8
author Jens Lehmann <Jens.Lehmann@web.de> 1263846378 +0100
committer Junio C Hamano <gitster@pobox.com> 1263864501 -0800

Performance optimization for detection of modified submodules

In the worst case is_submodule_modified() got called three times for
each submodule. The information we got from scanning the whole
submodule tree the first time can be reused instead.

New parameters have been added to diff_change() and diff_addremove(),
the information is stored in a new member of struct diff_filespec. Its
value is then reused instead of calling is_submodule_modified() again.

When no explicit "-dirty" is needed in the output the call to
is_submodule_modified() is not necessary when the submodules HEAD
already disagrees with the ref of the superproject, as this alone
marks it as modified. To achieve that, get_stat_data() got an extra
argument.

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>