From 2c6d53fe5305d71acc530bb29bbb8be2546994b9 Mon Sep 17 00:00:00 2001
From: David Wilson <daviwil@github.com>
Date: Thu, 22 Mar 2018 18:37:27 -0700
Subject: [PATCH] Shim util.promisify since it doesn't exist prior to Node 8

---
 index.js | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index ea54819..5889c1f 100644
--- a/index.js
+++ b/index.js
@@ -13,8 +13,25 @@ const util = require('util');
 const ini = require('ini');
 const configPath = require('git-config-path');
 const expand = require('expand-tilde');
-const read = util.promisify(fs.readFile);
-const stat = util.promisify(fs.stat);
+
+/**
+ * Wraps an arbitrary function in a Promise.
+ *
+ * @param {Function} `func` The function to be wrapped.
+ */
+
+function promisify(func) {
+  return function (...args) {
+    return new Promise((resolve, reject) => {
+      func(...args, (err, res) => {
+        err ? reject(err) : resolve(res);
+      });
+    });
+  }
+}
+
+const read = promisify(fs.readFile);
+const stat = promisify(fs.stat);
 
 /**
  * Asynchronously parse a `.git/config` file. If only the callback is passed,