Refactor mkdirsSync

lib/mkdirs/mkdirs-sync.js

@@ -1,19 +1,21 @@
-var fs = require('graceful-fs')
+'use strict'
-var path = require('path')
-var invalidWin32Path = require('./win32').invalidWin32Path
 
-var o777 = parseInt('0777', 8)
+const fs = require('graceful-fs')
+const path = require('path')
+const invalidWin32Path = require('./win32').invalidWin32Path
+
+const o777 = parseInt('0777', 8)
 
 function mkdirsSync (p, opts, made) {
   if (!opts || typeof opts !== 'object') {
     opts = { mode: opts }
   }
 
-  var mode = opts.mode
+  let mode = opts.mode
-  var xfs = opts.fs || fs
+  const xfs = opts.fs || fs
 
   if (process.platform === 'win32' && invalidWin32Path(p)) {
-    var errInval = new Error(p + ' contains invalid WIN32 path characters.')
+    const errInval = new Error(p + ' contains invalid WIN32 path characters.')
     errInval.code = 'EINVAL'
     throw errInval
   }
@@ -40,7 +42,7 @@ function mkdirsSync (p, opts, made) {
       // there already.  If so, then hooray!  If not, then something
       // is borked.
       default:
-        var stat
+        let stat
         try {
           stat = xfs.statSync(p)
         } catch (err1) {