commit d82ad331dd0534d30ff4b9f4b180949377be04c1
from: Stefan Sperling <stsp@stsp.name>
date: Wed May 09 18:53:57 2018 UTC

add get_head_commit_id() helper function to tog

commit - 5da4c0f8c9d650fb453e89ebf9a08883d6d6ecc1
commit + d82ad331dd0534d30ff4b9f4b180949377be04c1
blob - 05264b31220545ef2b839e448e4714330439e160
blob + 30c2779376b3b0fffa8e8fe586ab2ea6d27f9f88
--- tog/tog.c
+++ tog/tog.c
@@ -347,6 +347,28 @@ draw_commits(struct commit_queue *commits, int selecte
 }
 
 static const struct got_error *
+get_head_commit_id(struct got_object_id **head_id, struct got_repository *repo)
+{
+	const struct got_error *err = NULL;
+	struct got_reference *head_ref;
+
+	*head_id = NULL;
+
+	err = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
+	if (err)
+		return err;
+
+	err = got_ref_resolve(head_id, repo, head_ref);
+	got_ref_close(head_ref);
+	if (err) {
+		*head_id = NULL;
+		return err;
+	}
+
+	return NULL;
+}
+
+static const struct got_error *
 show_log_view(struct got_object_id *start_id, struct got_repository *repo)
 {
 	const struct got_error *err = NULL;
@@ -511,14 +533,9 @@ cmd_log(int argc, char *argv[])
 		return error;
 
 	if (start_commit == NULL) {
-		struct got_reference *head_ref;
-		error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
+		error = get_head_commit_id(&id, repo);
 		if (error != NULL)
 			return error;
-		error = got_ref_resolve(&id, repo, head_ref);
-		got_ref_close(head_ref);
-		if (error != NULL)
-			return error;
 	} else {
 		struct got_object *obj;
 		error = got_object_open_by_id_str(&obj, repo, start_commit);