merge-ort: provide a merge_get_conflicted_files() helper function

After a merge, this function allows the user to extract the same
information that would be printed by `ls-files -u`, which means
files with their mode, oid, and stage.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/merge-ort.c b/merge-ort.c
index 3c6d0577de..bc1fcad8b4 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -4296,6 +4296,37 @@ void merge_display_update_messages(struct merge_options *opt,
 	trace2_region_leave("merge", "display messages", opt->repo);
 }
 
+void merge_get_conflicted_files(struct merge_result *result,
+				struct string_list *conflicted_files)
+{
+	struct hashmap_iter iter;
+	struct strmap_entry *e;
+	struct merge_options_internal *opti = result->priv;
+
+	strmap_for_each_entry(&opti->conflicted, &iter, e) {
+		const char *path = e->key;
+		struct conflict_info *ci = e->value;
+		int i;
+
+		VERIFY_CI(ci);
+
+		for (i = MERGE_BASE; i <= MERGE_SIDE2; i++) {
+			struct stage_info *si;
+
+			if (!(ci->filemask & (1ul << i)))
+				continue;
+
+			si = xmalloc(sizeof(*si));
+			si->stage = i+1;
+			si->mode = ci->stages[i].mode;
+			oidcpy(&si->oid, &ci->stages[i].oid);
+			string_list_append(conflicted_files, path)->util = si;
+		}
+	}
+	/* string_list_sort() uses a stable sort, so we're good */
+	string_list_sort(conflicted_files);
+}
+
 void merge_switch_to_result(struct merge_options *opt,
 			    struct tree *head,
 			    struct merge_result *result,