builtin/notes.c: Refactor creation of notes commits.

Create new function create_notes_commit() which is slightly more general than
commit_notes() (accepts multiple commit parents and does not auto-update the
notes ref). This function will be used by the notes-merge functionality in
future patches.

Also rewrite builtin/notes.c:commit_notes() to reuse this new function.

Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/notes-merge.h b/notes-merge.h
index fd572ac35c..49e1b3a0f2 100644
--- a/notes-merge.h
+++ b/notes-merge.h
@@ -15,6 +15,20 @@ struct notes_merge_options {
 void init_notes_merge_options(struct notes_merge_options *o);
 
 /*
+ * Create new notes commit from the given notes tree
+ *
+ * Properties of the created commit:
+ * - tree: the result of converting t to a tree object with write_notes_tree().
+ * - parents: the given parents OR (if NULL) the commit referenced by t->ref.
+ * - author/committer: the default determined by commmit_tree().
+ * - commit message: msg
+ *
+ * The resulting commit SHA1 is stored in result_sha1.
+ */
+void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
+			 const char *msg, unsigned char *result_sha1);
+
+/*
  * Merge notes from o->remote_ref into o->local_ref
  *
  * The commits given by the two refs are merged, producing one of the following