commit-reach: move ref_newer from remote.c
There are several commit walks in the codebase. Group them together into
a new commit-reach.c file and corresponding header. After we group these
walks into one place, we can reduce duplicate logic by calling
equivalent methods.
The ref_newer() method is used by 'git push -f' to check if a force-push
is necessary. By making the method public, we make it possible to test
the method directly without setting up an envieronment where a 'git
push' call makes sense.
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/commit-reach.h b/commit-reach.h
index 1ea2696..f1cf9bf 100644
--- a/commit-reach.h
+++ b/commit-reach.h
@@ -39,4 +39,6 @@ struct commit_list *reduce_heads(struct commit_list *heads);
*/
void reduce_heads_replace(struct commit_list **heads);
+int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid);
+
#endif
