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-rw-r--r--merge-ort.h19
1 files changed, 18 insertions, 1 deletions
diff --git a/merge-ort.h b/merge-ort.h
index 74adccad16..d53a0a339f 100644
--- a/merge-ort.h
+++ b/merge-ort.h
@@ -7,7 +7,14 @@ struct commit;
struct tree;
struct merge_result {
- /* Whether the merge is clean */
+ /*
+ * Whether the merge is clean; possible values:
+ * 1: clean
+ * 0: not clean (merge conflicts)
+ * <0: operation aborted prematurely. (object database
+ * unreadable, disk full, etc.) Worktree may be left in an
+ * inconsistent state if operation failed near the end.
+ */
int clean;
/*
@@ -27,6 +34,16 @@ struct merge_result {
/*
* rename-detecting three-way merge with recursive ancestor consolidation.
* working tree and index are untouched.
+ *
+ * merge_bases will be consumed (emptied) so make a copy if you need it.
+ *
+ * NOTE: empirically, the recursive algorithm will perform better if you
+ * pass the merge_bases in the order of oldest commit to the
+ * newest[1][2].
+ *
+ * [1] https://lore.kernel.org/git/nycvar.QRO.7.76.6.1907252055500.21907@tvgsbejvaqbjf.bet/
+ * [2] commit 8918b0c9c2 ("merge-recur: try to merge older merge bases
+ * first", 2006-08-09)
*/
void merge_incore_recursive(struct merge_options *opt,
struct commit_list *merge_bases,