checkout: use empty baseline when no indexethomson/checkout_no_index

When no index file exists and a baseline is not explicitly provided, use
an empty baseline instead of trying to load `HEAD`.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/checkout.c b/src/checkout.c
index b3e95dff8..f39c341d4 100644
--- a/src/checkout.c
+++ b/src/checkout.c
@@ -2430,8 +2430,13 @@ static int checkout_data_init(
 
 	if (!data->opts.baseline && !data->opts.baseline_index) {
 		data->opts_free_baseline = true;
+		error = 0;
 
-		error = checkout_lookup_head_tree(&data->opts.baseline, repo);
+		/* if we don't have an index, this is an initial checkout and
+		 * should be against an empty baseline
+		 */
+		if (data->index->on_disk)
+			error = checkout_lookup_head_tree(&data->opts.baseline, repo);
 
 		if (error == GIT_EUNBORNBRANCH) {
 			error = 0;