chore: modernize JS in bin/asar.js

bin/asar.js

@@ -1,9 +1,9 @@
 #!/usr/bin/env node
 
-var packageJSON = require('../package.json')
-var splitVersion = function (version) { return version.split('.').map(function (part) { return Number(part) }) }
-var requiredNodeVersion = splitVersion(packageJSON.engines.node.slice(2))
-var actualNodeVersion = splitVersion(process.versions.node)
+const packageJSON = require('../package.json')
+const splitVersion = function (version) { return version.split('.').map(part => Number(part)) }
+const requiredNodeVersion = splitVersion(packageJSON.engines.node.slice(2))
+const actualNodeVersion = splitVersion(process.versions.node)
 
 if (actualNodeVersion[0] < requiredNodeVersion[0] || (actualNodeVersion[0] === requiredNodeVersion[0] && actualNodeVersion[1] < requiredNodeVersion[1])) {
   console.error('CANNOT RUN WITH NODE ' + process.versions.node)
@@ -12,8 +12,8 @@ if (actualNodeVersion[0] < requiredNodeVersion[0] || (actualNodeVersion[0] === r
 }
 
 // Not consts so that this file can load in Node < 4.0
-var asar = require('../lib/asar')
-var program = require('commander')
+const asar = require('../lib/asar')
+const program = require('commander')
 
 program.version('v' + packageJSON.version)
   .description('Manipulate asar archive files')
@@ -25,7 +25,7 @@ program.command('pack <dir> <output>')
   .option('--unpack <expression>', 'do not pack files matching glob <expression>')
   .option('--unpack-dir <expression>', 'do not pack dirs matching glob <expression> or starting with literal <expression>')
   .option('--exclude-hidden', 'exclude hidden files')
-  .action(function (dir, output, options) {
+  .action((dir, output, options) => {
     options = {
       unpack: options.unpack,
       unpackDir: options.unpackDir,
@@ -35,7 +35,7 @@ program.command('pack <dir> <output>')
       builddir: options.sb,
       dot: !options.excludeHidden
     }
-    asar.createPackageWithOptions(dir, output, options, function (error) {
+    asar.createPackageWithOptions(dir, output, options, error => {
       if (error) {
         console.error(error.stack)
         process.exit(1)
@@ -47,33 +47,33 @@ program.command('list <archive>')
   .alias('l')
   .description('list files of asar archive')
   .option('-i, --is-pack', 'each file in the asar is pack or unpack')
-  .action(function (archive, options) {
+  .action((archive, options) => {
     options = {
       isPack: options.isPack
     }
-    var files = asar.listPackage(archive, options)
-    for (var i in files) {
+    const files = asar.listPackage(archive, options)
+    for (let i in files) {
       console.log(files[i])
     }
   })
 
 program.command('extract-file <archive> <filename>')
   .alias('ef')
   .description('extract one file from archive')
-  .action(function (archive, filename) {
+  .action((archive, filename) => {
     require('fs').writeFileSync(require('path').basename(filename),
       asar.extractFile(archive, filename))
   })
 
 program.command('extract <archive> <dest>')
   .alias('e')
   .description('extract archive')
-  .action(function (archive, dest) {
+  .action((archive, dest) => {
     asar.extractAll(archive, dest)
   })
 
 program.command('*')
-  .action(function (cmd) {
+  .action(cmd => {
     console.log('asar: \'%s\' is not an asar command. See \'asar --help\'.', cmd)
   })