Make 'traverse_trees()' traverse conflicting DF entries in parallel

This makes the traverse_trees() entry comparator routine use the more
relaxed form of name comparison that considers files and directories
with the same name identical.

We pass in a separate mask for just the directory entries, so that the
callback routine can decide (if it wants to) to only handle one or the
other type, but generally most (all?) users are expected to really want
to see the case of a name 'foo' showing up in one tree as a file and in
another as a directory at the same time.

In particular, moving 'unpack_trees()' over to use this tree traversal
mechanism requires this.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/tree-walk.h b/tree-walk.h
index c123cfeef4..42110a465f 100644
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -34,7 +34,7 @@ int tree_entry(struct tree_desc *, struct name_entry *);
 void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1);
 
 struct traverse_info;
-typedef int (*traverse_callback_t)(int n, unsigned long mask, struct name_entry *entry, struct traverse_info *);
+typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
 int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
 
 struct traverse_info {
@@ -42,6 +42,7 @@ struct traverse_info {
 	struct name_entry name;
 	int pathlen;
 
+	unsigned long conflicts;
 	traverse_callback_t fn;
 	void *data;
 };