Replace var with const for unbuild.js

Credit: @RobertJGabriel
PR-URL: #210
Close: #210
Reviewed-by: @isaacs

lib/unbuild.js

@@ -2,17 +2,17 @@ module.exports = unbuild
 module.exports.rmStuff = rmStuff
 unbuild.usage = 'npm unbuild <folder>\n(this is plumbing)'
 
-var readJson = require('read-package-json')
-var gentlyRm = require('./utils/gently-rm.js')
-var npm = require('./npm.js')
-var path = require('path')
-var isInside = require('path-is-inside')
-var lifecycle = require('./utils/lifecycle.js')
-var asyncMap = require('slide').asyncMap
-var chain = require('slide').chain
-var log = require('npmlog')
-var build = require('./build.js')
-var output = require('./utils/output.js')
+const readJson = require('read-package-json')
+const gentlyRm = require('./utils/gently-rm.js')
+const npm = require('./npm.js')
+const path = require('path')
+const isInside = require('path-is-inside')
+const lifecycle = require('./utils/lifecycle.js')
+const asyncMap = require('slide').asyncMap
+const chain = require('slide').chain
+const log = require('npmlog')
+const build = require('./build.js')
+const output = require('./utils/output.js')
 
 // args is a list of folders.
 // remove any bins/etc, and then delete the folder.
@@ -30,7 +30,7 @@ function unbuild_ (silent) {
       cb_(er, path.relative(npm.root, folder))
     }
     folder = path.resolve(folder)
-    var base = isInside(folder, npm.prefix) ? npm.prefix : folder
+    const base = isInside(folder, npm.prefix) ? npm.prefix : folder
     delete build._didBuild[folder]
     log.verbose('unbuild', folder.substr(npm.prefix.length + 1))
     readJson(path.resolve(folder, 'package.json'), function (er, pkg) {
@@ -58,13 +58,13 @@ function rmStuff (pkg, folder, cb) {
   // if it's global, and folder is in {prefix}/node_modules,
   // then bins are in {prefix}/bin
   // otherwise, then bins are in folder/../.bin
-  var dir = path.dirname(folder)
-  var scope = path.basename(dir)
-  var parent = scope.charAt(0) === '@' ? path.dirname(dir) : dir
-  var gnm = npm.dir
+  const dir = path.dirname(folder)
+  const scope = path.basename(dir)
+  const parent = scope.charAt(0) === '@' ? path.dirname(dir) : dir
+  const gnm = npm.dir
   // gnm might be an absolute path, parent might be relative
   // this checks they're the same directory regardless
-  var top = path.relative(gnm, parent) === ''
+  const top = path.relative(gnm, parent) === ''
 
   log.verbose('unbuild rmStuff', pkg._id, 'from', gnm)
   if (!top) log.verbose('unbuild rmStuff', 'in', parent)
@@ -75,7 +75,7 @@ function rmStuff (pkg, folder, cb) {
 
 function rmBins (pkg, folder, parent, top, cb) {
   if (!pkg.bin) return cb()
-  var binRoot = top ? npm.bin : path.resolve(parent, '.bin')
+  const binRoot = top ? npm.bin : path.resolve(parent, '.bin')
   asyncMap(Object.keys(pkg.bin), function (b, cb) {
     if (process.platform === 'win32') {
       chain([ [gentlyRm, path.resolve(binRoot, b) + '.cmd', true, folder],
@@ -98,7 +98,7 @@ function rmMans (pkg, folder, parent, top, cb) {
       !npm.config.get('global')) {
     return cb()
   }
-  var manRoot = path.resolve(npm.config.get('prefix'), 'share', 'man')
+  const manRoot = path.resolve(npm.config.get('prefix'), 'share', 'man')
   log.verbose('rmMans', 'man files are', pkg.man, 'in', manRoot)
   asyncMap(pkg.man, function (man, cb) {
     if (Array.isArray(man)) {
@@ -109,7 +109,7 @@ function rmMans (pkg, folder, parent, top, cb) {
 
     function rmMan (man) {
       log.silly('rmMan', 'preparing to remove', man)
-      var parseMan = man.match(/(.*\.([0-9]+)(\.gz)?)$/)
+      const parseMan = man.match(/(.*\.([0-9]+)(\.gz)?)$/)
       if (!parseMan) {
         log.error(
           'rmMan', man, 'is not a valid name for a man file.',
@@ -119,11 +119,11 @@ function rmMans (pkg, folder, parent, top, cb) {
         return cb()
       }
 
-      var stem = parseMan[1]
-      var sxn = parseMan[2]
-      var gz = parseMan[3] || ''
-      var bn = path.basename(stem)
-      var manDest = path.join(
+      const stem = parseMan[1]
+      const sxn = parseMan[2]
+      const gz = parseMan[3] || ''
+      const bn = path.basename(stem)
+      const manDest = path.join(
         manRoot,
         'man' + sxn,
         (bn.indexOf(pkg.name) === 0 ? bn : pkg.name + '-' + bn) + '.' + sxn + gz