fix: linter

bin/config.js

@@ -1,24 +1,24 @@
 'use strict'
 
-var pkg = require('../package.json')
-var FIVE_DAYS = 1000 * 60 * 60 * 24 * 5
+const pkg = require('../package.json')
+const FIVE_DAYS = 1000 * 60 * 60 * 24 * 5
 
-var Configstore = require('configstore')
-var configName = 'update-notifier-' + pkg.name
-var config = new Configstore(configName, { nodeVersions: [] })
-var fetchCheckInterval = process.env.NODENGINE_INTERVAL || FIVE_DAYS
+const Configstore = require('configstore')
+const configName = 'update-notifier-' + pkg.name
+const config = new Configstore(configName, { nodeVersions: [] })
+const fetchCheckInterval = process.env.NODENGINE_INTERVAL || FIVE_DAYS
 
-var waterfall = require('async').waterfall
-var fetch = require('./fetch')
+const waterfall = require('async').waterfall
+const fetch = require('./fetch')
 
 function loadConfig (cb) {
-  var tasks = [
+  const tasks = [
     function checkCache (next) {
-      var currentNodeVersions = config.get('nodeVersions')
-      var lastFetchCheck = config.get('lastFetchCheck')
-      var hasVersions = currentNodeVersions.length
-      var now = Date.now()
-      var isCacheValid = now - lastFetchCheck < fetchCheckInterval
+      const currentNodeVersions = config.get('nodeVersions')
+      const lastFetchCheck = config.get('lastFetchCheck')
+      const hasVersions = currentNodeVersions.length
+      const now = Date.now()
+      const isCacheValid = now - lastFetchCheck < fetchCheckInterval
 
       if (hasVersions && isCacheValid) return next(null, currentNodeVersions)
 

bin/fetch.js

@@ -1,12 +1,12 @@
 'use strict'
 
-var get = require('simple-get')
-var URL = 'https://semver.io/node/versions'
+const get = require('simple-get')
+const URL = 'https://semver.io/node/versions'
 
 function fetch (cb) {
   get.concat(URL, function (err, res, data) {
     if (err) return cb(err)
-    var nodeVersions = data.toString().split('\n')
+    const nodeVersions = data.toString().split('\n')
     return cb(null, nodeVersions)
   })
 }

bin/index.js

@@ -2,16 +2,16 @@
 
 'use strict'
 
-var path = require('path')
-var fs = require('fs')
+const path = require('path')
+const fs = require('fs')
 
 require('meow')({
   pkg: require(path.resolve(__dirname, '../package.json')),
   help: fs.readFileSync(path.resolve(__dirname, './help.txt'), 'utf8')
 })
 
-var pkgPath = path.resolve('package.json')
-var pkg = fs.existsSync(pkgPath) ? require(pkgPath) : {}
-var nodeVersion = pkg.engines && pkg.engines.node
+const pkgPath = path.resolve('package.json')
+const pkg = fs.existsSync(pkgPath) ? require(pkgPath) : {}
+const nodeVersion = pkg.engines && pkg.engines.node
 
 !nodeVersion ? process.exit() : require('./switch')(nodeVersion)

bin/switch.js

@@ -1,20 +1,20 @@
 'use strict'
 
-var waterfall = require('async').waterfall
-var semver = require('semver')
+const waterfall = require('async').waterfall
+const semver = require('semver')
 
 function _switch (nodeVersion) {
-  var createSwitcher = require('./switcher')
-  var config = require('./config')
+  const createSwitcher = require('./switcher')
+  const config = require('./config')
 
-  var tasks = [
+  const tasks = [
     function loadConfig (next) {
       return config(next)
     },
     function getSwitcher (versions, next) {
-      var currentVersion = process.versions.node
-      var maxSatisfyVersion = semver.maxSatisfying(versions, nodeVersion)
-      var switcher = createSwitcher(maxSatisfyVersion, currentVersion)
+      const currentVersion = process.versions.node
+      const maxSatisfyVersion = semver.maxSatisfying(versions, nodeVersion)
+      const switcher = createSwitcher(maxSatisfyVersion, currentVersion)
 
       switcher.getBin(function (err, bin) {
         return next(err, switcher, bin)

bin/switcher.js

@@ -1,11 +1,11 @@
 'use strict'
 
-var spawn = require('child_process').spawn
-var doWhilst = require('async').doWhilst
-var which = require('./which')
+const spawn = require('child_process').spawn
+const doWhilst = require('async').doWhilst
+const which = require('./which')
 
 function nvmCommand (maxSatisfyVersion, currentVersion) {
-  var cmd = ''
+  let cmd = ''
   cmd += 'nvm install '
   cmd += maxSatisfyVersion
   if (currentVersion !== maxSatisfyVersion) {
@@ -16,7 +16,7 @@ function nvmCommand (maxSatisfyVersion, currentVersion) {
 }
 
 function createSwitcher (maxSatisfyVersion, currentVersion) {
-  var binaries = {
+  const binaries = {
     n: {
       cmd: 'n',
       args: [maxSatisfyVersion]
@@ -29,12 +29,12 @@ function createSwitcher (maxSatisfyVersion, currentVersion) {
 
   return {
     getBin: function (cb) {
-      var binariesNames = Object.keys(binaries)
-      var index = 0
-      var bin
+      const binariesNames = Object.keys(binaries)
+      let index = 0
+      let bin
 
       function getBin (cb) {
-        var binName = binariesNames[index++]
+        const binName = binariesNames[index++]
         which(binName, function (err) {
           if (!err) bin = binName
           return cb()

bin/which.js

@@ -1,10 +1,10 @@
 'use strict'
 
-var _which = require('which')
-var NVM_DIR = process.env.NVM_DIR
+const _which = require('which')
+const NVM_DIR = process.env.NVM_DIR
 
 function which (bin, cb) {
-  var binaries = {
+  const binaries = {
     n: function () { return _which(bin, cb) },
     nvm: function () { return cb(NVM_DIR ? null : 'nope') }
   }