builtin/commit.c: extract ignore_non_trailer() helper function

diff --git a/unpack-trees.h b/unpack-trees.h
index 5e432f576eb2304a63510a61a71182e11f777092..36a73a6d003b6906dfb402aa930b352f5b368c60 100644 (file)
--- a/unpack-trees.h
+++ b/unpack-trees.h
@@ -8,7 +8,7 @@
 struct unpack_trees_options;
 struct exclude_list;
 
-typedef int (*merge_fn_t)(struct cache_entry **src,
+typedef int (*merge_fn_t)(const struct cache_entry * const *src,
                struct unpack_trees_options *options);
 
 enum unpack_trees_error_types {
@@ -77,9 +77,13 @@ struct unpack_trees_options {
 extern int unpack_trees(unsigned n, struct tree_desc *t,
                struct unpack_trees_options *options);
 
-int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o);
-int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o);
-int bind_merge(struct cache_entry **src, struct unpack_trees_options *o);
-int oneway_merge(struct cache_entry **src, struct unpack_trees_options *o);
+int threeway_merge(const struct cache_entry * const *stages,
+                  struct unpack_trees_options *o);
+int twoway_merge(const struct cache_entry * const *src,
+                struct unpack_trees_options *o);
+int bind_merge(const struct cache_entry * const *src,
+              struct unpack_trees_options *o);
+int oneway_merge(const struct cache_entry * const *src,
+                struct unpack_trees_options *o);
 
 #endif