1 files changed, 26 insertions, 0 deletions
diff --git a/js/os.ts b/js/os.ts
index cca121874..5cb1d1fdb 100644
--- a/js/os.ts
+++ b/js/os.ts
@@ -336,3 +336,29 @@ export function writeFileSync(
   const msg = fbs.WriteFileSync.endWriteFileSync(builder);
   send(builder, fbs.Any.WriteFileSync, msg);
 }
+
+/**
+ * Renames (moves) oldpath to newpath.
+ *     import { renameSync } from "deno";
+ *     const oldpath = 'from/path';
+ *     const newpath = 'to/path';
+ *
+ *     renameSync(oldpath, newpath);
+ */
+export function renameSync(oldpath: string, newpath: string): void {
+  /* Ideally we could write:
+  const res = send({
+    command: fbs.Command.RENAME_SYNC,
+    renameOldPath: oldpath,
+    renameNewPath: newpath
+  });
+  */
+  const builder = new flatbuffers.Builder();
+  const _oldpath = builder.createString(oldpath);
+  const _newpath = builder.createString(newpath);
+  fbs.RenameSync.startRenameSync(builder);
+  fbs.RenameSync.addOldpath(builder, _oldpath);
+  fbs.RenameSync.addNewpath(builder, _newpath);
+  const msg = fbs.RenameSync.endRenameSync(builder);
+  send(builder, fbs.Any.RenameSync, msg);
+}