[PATCH] Rename and extend read_tree_with_tree_or_commit_sha1

This patch renames read_tree_with_tree_or_commit_sha1() to
read_object_with_reference() and extends it to automatically
dereference not just "commit" objects but "tag" objects.  With
this patch, you can say e.g.:

    ls-tree $tag
    read-tree -m $(merge-base $tag $HEAD) $tag $HEAD
    diff-cache $tag
    diff-tree $tag $HEAD

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/cache.h b/cache.h
index 3277d4870..aca98f3ec 100644
--- a/cache.h
+++ b/cache.h
@@ -143,9 +143,10 @@ extern int error(const char *err, ...);
 
 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 
-extern void *read_tree_with_tree_or_commit_sha1(const unsigned char *sha1,
-						unsigned long *size,
-						unsigned char *tree_sha1_ret);
+extern void *read_object_with_reference(const unsigned char *sha1,
+					const unsigned char *required_type,
+					unsigned long *size,
+					unsigned char *sha1_ret);
 
 static inline void *xmalloc(int size)
 {