tree 69b655383aafc8b6fd38942e841e2b477309cd83
parent 22af33bece7e121b9d535d0a117cd4553b00fe07
author Nguyễn Thái Ngọc Duy <pclouds@gmail.com> 1542559680 +0100
committer Junio C Hamano <gitster@pobox.com> 1542592233 +0900

tree-walk: support :(attr) matching

This lets us use :(attr) with "git grep <tree-ish>" or "git log".

:(attr) requires another round of checking before we can declare that
a path is matched. This is done after path matching since we have lots
of optimization to take a shortcut when things don't match.

Note that if :(attr) is present, we can't return
all_entries_interesting / all_entries_not_interesting anymore because
we can't be certain about that. Not until match_pathspec_attrs() can
tell us "yes all these paths satisfy :(attr)".

Second note. Even though we walk a specific tree, we use attributes
from _worktree_ (or falling back to the index), not from .gitattributes
files on that tree. This by itself is not necessarily wrong, but the
user just have to be aware of this.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>