From 71496919f37e93583979e5921ab8b2a3fdfb1c48 Mon Sep 17 00:00:00 2001
From: Mani Maghsoudlou <manidlou@gmail.com>
Date: Mon, 5 Feb 2018 20:55:52 -0800
Subject: [PATCH] refactor move, remove comments

---
 lib/move/index.js | 37 ++++++++++++++-----------------------
 1 file changed, 14 insertions(+), 23 deletions(-)

diff --git a/lib/move/index.js b/lib/move/index.js
index fb30cb89..04fda50f 100644
--- a/lib/move/index.js
+++ b/lib/move/index.js
@@ -1,15 +1,11 @@
 'use strict'
 
-// most of this code was written by Andrew Kelley
-// licensed under the BSD license: see
-// https://github.com/andrewrk/node-mv/blob/master/package.json
-
 const u = require('universalify').fromCallback
 const fs = require('graceful-fs')
 const path = require('path')
 const copy = require('../copy').copy
 const remove = require('../remove').remove
-const mkdirp = require('../mkdirs').mkdirs
+const mkdirp = require('../mkdirs').mkdirp
 
 const destIsFile = Symbol('destIsFile')
 const destIsDir = Symbol('destIsDir')
@@ -24,26 +20,22 @@ function move (src, dest, opts, cb) {
 
   src = path.resolve(src)
   dest = path.resolve(dest)
+
   if (src === dest) return fs.access(src, cb)
 
   fs.stat(src, (err, st) => {
     if (err) return cb(err)
-    if (st.isDirectory()) {
-      if (isSrcSubdir(src, dest)) return cb(new Error(`Cannot move '${src}' to a subdirectory of itself, '${dest}'.`))
-      checkDest(dest, (err, res) => {
-        if (err) return cb(err)
-        if (res === destIsFile) return cb(new Error(`Cannot move directory '${src}' to file '${dest}'.`))
-        if (!overwrite && res) return cb(new Error('dest already exists.'))
-        return doRename(src, dest, overwrite, cb)
-      })
-    } else {
-      checkDest(dest, (err, res) => {
-        if (err) return cb(err)
-        if (res === destIsDir) return cb(new Error(`Cannot move file '${src}' to directory '${dest}'.`))
-        if (!overwrite && res) return cb(new Error('dest already exists.'))
-        return doRename(src, dest, overwrite, cb)
-      })
-    }
+
+    const srcIsDir = st.isDirectory()
+    if (srcIsDir && isSrcSubdir(src, dest)) return cb(new Error(`Cannot move '${src}' to a subdirectory of itself, '${dest}'.`))
+
+    checkDest(dest, (err, res) => {
+      if (err) return cb(err)
+      if (!overwrite && res) return cb(new Error('dest already exists.'))
+      if (srcIsDir && res === destIsFile) return cb(new Error(`Cannot move directory '${src}' to file '${dest}'.`))
+      if (!srcIsDir && res === destIsDir) return cb(new Error(`Cannot move file '${src}' to directory '${dest}'.`))
+      return doRename(src, dest, overwrite, cb)
+    })
   })
 }
 
@@ -96,8 +88,7 @@ function checkDest (dest, cb) {
       if (err.code === 'ENOENT') return cb()
       return cb(err)
     }
-    if (st.isDirectory()) return cb(null, destIsDir)
-    return cb(null, destIsFile)
+    return cb(null, st.isDirectory() ? destIsDir : destIsFile)
   })
 }