unpack-trees: preserve index extensions

diff --git a/cache.h b/cache.h
index e1f0e182ad011d5a3b6912f48b597dcc6d1070b0..d41336dfd5de9f8fa1486e3d7e41fead87808d6f 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -597,6 +597,7 @@ extern int read_index_unmerged(struct index_state *);
 #define CLOSE_LOCK             (1 << 1)
 extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
 extern int discard_index(struct index_state *);
+extern void move_index_extensions(struct index_state *dst, struct index_state *src);
 extern int unmerged_index(const struct index_state *);
 extern int verify_path(const char *path);
 extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change);