1 files changed, 30 insertions, 0 deletions
diff --git a/cli/js/copy_file.ts b/cli/js/copy_file.ts
new file mode 100644
index 000000000..94d2b63db
--- /dev/null
+++ b/cli/js/copy_file.ts
@@ -0,0 +1,30 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { sendSync, sendAsync } from "./dispatch_json.ts";
+import * as dispatch from "./dispatch.ts";
+
+/** Copies the contents of a file to another by name synchronously.
+ * Creates a new file if target does not exists, and if target exists,
+ * overwrites original content of the target file.
+ *
+ * It would also copy the permission of the original file
+ * to the destination.
+ *
+ *       Deno.copyFileSync("from.txt", "to.txt");
+ */
+export function copyFileSync(from: string, to: string): void {
+  sendSync(dispatch.OP_COPY_FILE, { from, to });
+}
+
+/** Copies the contents of a file to another by name.
+ *
+ * Creates a new file if target does not exists, and if target exists,
+ * overwrites original content of the target file.
+ *
+ * It would also copy the permission of the original file
+ * to the destination.
+ *
+ *       await Deno.copyFile("from.txt", "to.txt");
+ */
+export async function copyFile(from: string, to: string): Promise<void> {
+  await sendAsync(dispatch.OP_COPY_FILE, { from, to });
+}