refactor: updates var usage to let (#321)

.eslintrc

@@ -0,0 +1,6 @@
+{
+  "extends": "standard",
+  "rules": {
+    "no-var": "error"
+  }
+}

command.js

@@ -1,4 +1,4 @@
-var defaults = require('./defaults')
+let defaults = require('./defaults')
 
 module.exports = require('yargs')
   .usage('Usage: $0 [options]')

index.js

@@ -11,9 +11,9 @@ module.exports = function standardVersion (argv) {
   let pkg
   bump.pkgFiles.forEach((filename) => {
     if (pkg) return
-    var pkgPath = path.resolve(process.cwd(), filename)
+    let pkgPath = path.resolve(process.cwd(), filename)
     try {
-      var data = fs.readFileSync(pkgPath, 'utf8')
+      let data = fs.readFileSync(pkgPath, 'utf8')
       pkg = JSON.parse(data)
     } catch (err) {}
   })

lib/lifecycles/bump.js

@@ -14,15 +14,15 @@ const semver = require('semver')
 const stringifyPackage = require('stringify-package')
 const writeFile = require('../write-file')
 
-var configsToUpdate = {}
+let configsToUpdate = {}
 
 function Bump (args, version) {
   // reset the cache of updated config files each
   // time we perform the version bump step.
   configsToUpdate = {}
 
   if (args.skip.bump) return Promise.resolve()
-  var newVersion = version
+  let newVersion = version
   return runLifecycleScript(args, 'prerelease')
     .then(runLifecycleScript.bind(this, args, 'prebump'))
     .then((stdout) => {
@@ -31,7 +31,7 @@ function Bump (args, version) {
     })
     .then((release) => {
       if (!args.firstRelease) {
-        var releaseType = getReleaseType(args.prerelease, release.releaseType, version)
+        let releaseType = getReleaseType(args.prerelease, release.releaseType, version)
         newVersion = semver.valid(releaseType) || semver.inc(version, releaseType, args.prerelease)
         updateConfigs(args, newVersion)
       } else {
@@ -100,7 +100,7 @@ function isInPrerelease (version) {
   return Array.isArray(semver.prerelease(version))
 }
 
-var TypeList = ['major', 'minor', 'patch'].reverse()
+let TypeList = ['major', 'minor', 'patch'].reverse()
 
 /**
  * extract the in-pre-release type in target version
@@ -109,8 +109,8 @@ var TypeList = ['major', 'minor', 'patch'].reverse()
  * @return {string}
  */
 function getCurrentActiveType (version) {
-  var typelist = TypeList
-  for (var i = 0; i < typelist.length; i++) {
+  let typelist = TypeList
+  for (let i = 0; i < typelist.length; i++) {
     if (semver[typelist[i]](version)) {
       return typelist[i]
     }
@@ -163,13 +163,13 @@ function updateConfigs (args, newVersion) {
   Object.keys(configsToUpdate).forEach(function (configPath) {
     try {
       if (dotgit.ignore(configPath)) return
-      var stat = fs.lstatSync(configPath)
+      let stat = fs.lstatSync(configPath)
       if (stat.isFile()) {
-        var data = fs.readFileSync(configPath, 'utf8')
-        var indent = detectIndent(data).indent
-        var newline = detectNewline(data)
-        var config = JSON.parse(data)
-        var filename = path.basename(configPath)
+        let data = fs.readFileSync(configPath, 'utf8')
+        let indent = detectIndent(data).indent
+        let newline = detectNewline(data)
+        let config = JSON.parse(data)
+        let filename = path.basename(configPath)
         checkpoint(args, 'bumping version in ' + filename + ' from %s to %s', [config.version, newVersion])
         config.version = newVersion
         writeFile(args, configPath, stringifyPackage(config, indent, newline))

lib/lifecycles/changelog.js

@@ -20,17 +20,17 @@ module.exports = function (args, newVersion) {
 function outputChangelog (args, newVersion) {
   return new Promise((resolve, reject) => {
     createIfMissing(args)
-    var header = '# Change Log\n\nAll notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.\n'
-    var oldContent = args.dryRun ? '' : fs.readFileSync(args.infile, 'utf-8')
+    let header = '# Change Log\n\nAll notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.\n'
+    let oldContent = args.dryRun ? '' : fs.readFileSync(args.infile, 'utf-8')
     // find the position of the last release and remove header:
     const changelogSectionRegExp = /<a name=|##? \[?[0-9]+\.[0-9]+\.[0-9]+\]?/
     if (oldContent.search(changelogSectionRegExp) !== -1) {
       oldContent = oldContent.substring(oldContent.search(changelogSectionRegExp))
     }
-    var content = ''
-    var context
+    let content = ''
+    let context
     if (args.dryRun) context = { version: newVersion }
-    var changelogStream = conventionalChangelog({
+    let changelogStream = conventionalChangelog({
       debug: args.verbose && console.info.bind(console, 'conventional-changelog'),
       preset: args.preset || 'angular',
       tagPrefix: args.tagPrefix

lib/lifecycles/commit.js

@@ -18,10 +18,10 @@ module.exports = function (args, newVersion) {
 }
 
 function execCommit (args, newVersion) {
-  var msg = 'committing %s'
-  var paths = [args.infile]
-  var verify = args.verify === false || args.n ? '--no-verify ' : ''
-  var toAdd = ''
+  let msg = 'committing %s'
+  let paths = [args.infile]
+  let verify = args.verify === false || args.n ? '--no-verify ' : ''
+  let toAdd = ''
   // commit any of the config files that we've updated
   // the version # for.
   Object.keys(bump.getUpdatedConfigs()).forEach(function (p) {

lib/lifecycles/tag.js

@@ -17,7 +17,7 @@ module.exports = function (newVersion, pkgPrivate, args) {
 }
 
 function execTag (newVersion, pkgPrivate, args) {
-  var tagOption
+  let tagOption
   if (args.sign) {
     tagOption = '-s '
   } else {
@@ -26,7 +26,7 @@ function execTag (newVersion, pkgPrivate, args) {
   checkpoint(args, 'tagging release %s%s', [args.tagPrefix, newVersion])
   return runExec(args, 'git tag ' + tagOption + args.tagPrefix + newVersion + ' -m "' + formatCommitMessage(args.message, newVersion) + '"')
     .then(() => {
-      var message = 'git push --follow-tags origin master'
+      let message = 'git push --follow-tags origin master'
       if (pkgPrivate !== true) {
         message += ' && npm publish'
         if (args.prerelease !== undefined) {

lib/run-lifecycle-hook.js

@@ -5,7 +5,7 @@ const runExec = require('./run-exec')
 
 module.exports = function (args, hookName, newVersion, hooks, cb) {
   if (!hooks[hookName]) return Promise.resolve()
-  var command = hooks[hookName] + ' --new-version="' + newVersion + '"'
+  let command = hooks[hookName] + ' --new-version="' + newVersion + '"'
   checkpoint(args, 'Running lifecycle hook "%s"', [hookName])
   checkpoint(args, '- hook command: "%s"', [command], chalk.blue(figures.info))
   return runExec(args, command)

lib/run-lifecycle-script.js

@@ -6,7 +6,7 @@ const runExec = require('./run-exec')
 module.exports = function (args, hookName) {
   const scripts = args.scripts
   if (!scripts || !scripts[hookName]) return Promise.resolve()
-  var command = scripts[hookName]
+  let command = scripts[hookName]
   checkpoint(args, 'Running lifecycle script "%s"', [hookName])
   checkpoint(args, '- execute command: "%s"', [command], chalk.blue(figures.info))
   return runExec(args, command)

package.json

@@ -4,7 +4,7 @@
   "description": "replacement for `npm version` with automatic CHANGELOG generation",
   "bin": "bin/cli.js",
   "scripts": {
-    "pretest": "standard",
+    "pretest": "eslint .",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
     "test": "nyc mocha --timeout=20000 test.js",
     "release": "bin/cli.js"
@@ -54,11 +54,16 @@
   "devDependencies": {
     "chai": "^3.5.0",
     "coveralls": "^3.0.1",
+    "eslint": "^5.16.0",
+    "eslint-config-standard": "^12.0.0",
+    "eslint-plugin-import": "^2.16.0",
+    "eslint-plugin-node": "^8.0.1",
+    "eslint-plugin-promise": "^4.0.1",
+    "eslint-plugin-standard": "^4.0.0",
     "mocha": "^5.2.0",
     "mock-git": "^1.0.3",
     "mockery": "^2.0.0",
     "nyc": "^13.3.0",
-    "shelljs": "^0.7.8",
-    "standard": "^12.0.1"
+    "shelljs": "^0.7.8"
   }
 }