commit-graph: add --split option to builtin

diff --git a/commit-graph.c b/commit-graph.c
index f0698b05996757ae38562ad038400f6fb8889f17..1224309e5feb48a6cef4b86c41f5b4fecfcce604 100644 (file)
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -1472,12 +1472,16 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
                }
 
                if (ctx->base_graph_name) {
-                       result = rename(ctx->base_graph_name,
-                                       ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2]);
+                       const char *dest = ctx->commit_graph_filenames_after[
+                                               ctx->num_commit_graphs_after - 2];
 
-                       if (result) {
-                               error(_("failed to rename base commit-graph file"));
-                               return -1;
+                       if (strcmp(ctx->base_graph_name, dest)) {
+                               result = rename(ctx->base_graph_name, dest);
+
+                               if (result) {
+                                       error(_("failed to rename base commit-graph file"));
+                                       return -1;
+                               }
                        }
                } else {
                        char *graph_name = get_commit_graph_filename(ctx->obj_dir);