refactor: new direction

js/file.js

@@ -0,0 +1,17 @@
+const fs = require("fs");
+const util = require("util");
+
+let lib;
+
+function exists(path) {
+  const stat = util.promisify(fs.stat);
+  return stat(path);
+}
+
+function read(path) {
+  const readFile = util.promisify(fs.readFile);
+  return readFile(path).then(buffer => buffer.toString("utf-8"));
+}
+
+lib = { exists, read };
+module.exports = lib;