unpack-trees: avoid the_index in verify_absent()

Both functions that are updated in this commit are called by
verify_absent(), which is part of the "unpack-trees" operation that is
supposed to work on any index file specified by the caller. Thanks to
Brandon [1] [2], an implicit dependency on the_index is exposed. This
commit fixes it.

In both functions, it makes sense to use src_index to check for
exclusion because it's almost unchanged and should give us the same
outcome as if running the exclude check before the unpack.

It's "almost unchanged" because we do invalidate cache-tree and
untracked cache in the source index. But this should not affect how
exclude machinery uses the index: to see if a file is tracked, and to
read a blob from the index instead of worktree if it's marked
skip-worktree (i.e. it's not available in worktree)

[1] a0bba65b10 (dir: convert is_excluded to take an index - 2017-05-05
[2] 2c1eb10454 (dir: convert read_directory to take an index - 2017-05-05)

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

diff --git a/unpack-trees.c b/unpack-trees.c
index 5d11f10e665350cd6cc11acbc275e4051ae92e27..14e9043f9d9eb8f3641c83795d5eb6703346576e 100644 (file)
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -1658,7 +1658,7 @@ static int verify_clean_subdirectory(const struct cache_entry *ce,
        memset(&d, 0, sizeof(d));
        if (o->dir)
                d.exclude_per_dir = o->dir->exclude_per_dir;
-       i = read_directory(&d, &the_index, pathbuf, namelen+1, NULL);
+       i = read_directory(&d, o->src_index, pathbuf, namelen+1, NULL);
        if (i)
                return o->gently ? -1 :
                        add_rejected_path(o, ERROR_NOT_UPTODATE_DIR, ce->name);
@@ -1700,7 +1700,7 @@ static int check_ok_to_remove(const char *name, int len, int dtype,
                return 0;
 
        if (o->dir &&
-           is_excluded(o->dir, &the_index, name, &dtype))
+           is_excluded(o->dir, o->src_index, name, &dtype))
                /*
                 * ce->name is explicitly excluded, so it is Ok to
                 * overwrite it.