Refactor symlinkPaths/Sync

lib/ensure/symlink-paths.js

@@ -1,6 +1,8 @@
-var path = require('path')
+'use strict'
+
+const path = require('path')
 // path.isAbsolute shim for Node.js 0.10 support
-var fs = require('graceful-fs')
+const fs = require('graceful-fs')
 
 /**
  * Function that returns two types of paths, one relative to symlink, and one
@@ -26,7 +28,7 @@ var fs = require('graceful-fs')
 
 function symlinkPaths (srcpath, dstpath, callback) {
   if (path.isAbsolute(srcpath)) {
-    return fs.lstat(srcpath, function (err, stat) {
+    return fs.lstat(srcpath, (err, stat) => {
       if (err) {
         err.message = err.message.replace('lstat', 'ensureSymlink')
         return callback(err)
@@ -37,16 +39,16 @@ function symlinkPaths (srcpath, dstpath, callback) {
       })
     })
   } else {
-    var dstdir = path.dirname(dstpath)
-    var relativeToDst = path.join(dstdir, srcpath)
-    return fs.exists(relativeToDst, function (exists) {
+    const dstdir = path.dirname(dstpath)
+    const relativeToDst = path.join(dstdir, srcpath)
+    return fs.exists(relativeToDst, exists => {
       if (exists) {
         return callback(null, {
           'toCwd': relativeToDst,
           'toDst': srcpath
         })
       } else {
-        return fs.lstat(srcpath, function (err, stat) {
+        return fs.lstat(srcpath, (err, stat) => {
           if (err) {
             err.message = err.message.replace('lstat', 'ensureSymlink')
             return callback(err)
@@ -62,7 +64,7 @@ function symlinkPaths (srcpath, dstpath, callback) {
 }
 
 function symlinkPathsSync (srcpath, dstpath) {
-  var exists
+  let exists
   if (path.isAbsolute(srcpath)) {
     exists = fs.existsSync(srcpath)
     if (!exists) throw new Error('absolute srcpath does not exist')
@@ -71,8 +73,8 @@ function symlinkPathsSync (srcpath, dstpath) {
       'toDst': srcpath
     }
   } else {
-    var dstdir = path.dirname(dstpath)
-    var relativeToDst = path.join(dstdir, srcpath)
+    const dstdir = path.dirname(dstpath)
+    const relativeToDst = path.join(dstdir, srcpath)
     exists = fs.existsSync(relativeToDst)
     if (exists) {
       return {
@@ -91,6 +93,6 @@ function symlinkPathsSync (srcpath, dstpath) {
 }
 
 module.exports = {
-  'symlinkPaths': symlinkPaths,
-  'symlinkPathsSync': symlinkPathsSync
+  symlinkPaths,
+  symlinkPathsSync
 }