add a better packaging script that works on linux

package.json

@@ -25,16 +25,17 @@
   },
   "devDependencies": {
     "electron-packager": "^4.1.2",
-    "electron-prebuilt": "^0.27.2"
+    "electron-prebuilt": "0.27.2"
   },
   "bin": {
     "playback": "./app.js"
   },
   "scripts": {
     "start": "electron app.js",
     "dev": "electron app.js test.mp4",
-    "mac-bundle": "electron-packager . Playback --platform=darwin --arch=x64 --version=0.27.2 --ignore=node_modules/electron-prebuilt && cp info.plist Playback.app/Contents/Info.plist && cp icon.icns Playback.app/Contents/Resources/atom.icns",
-    "win-bundle": "electron-packager . Playback --platform=win32 --arch=ia32 --version=0.27.2 --icon=icon.ico"
+	"mac-bundle": "node pkg.js darwin x64",
+	"win-bundle": "node pkg.js win32 ia32",
+	"bundle": "node pkg.js"
   },
   "repository": {
     "type": "git",

pkg.js

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+
+// from https://github.com/moose-team/friends/blob/master/pkg.js
+
+var os = require('os')
+var pkgjson = require('./package.json')
+var path = require('path')
+var sh = require('shelljs')
+
+var appVersion = pkgjson.version
+var appName = 'Playback'
+var electronPackager = './node_modules/.bin/electron-packager'
+var electronVersion = pkgjson.devDependencies['electron-prebuilt']
+var icon = 'icon.icns'
+
+if (process.argv[2] === '--all') {
+  // build for all platforms
+  var archs = ['ia32', 'x64']
+  var platforms = ['linux', 'win32', 'darwin']
+
+  platforms.forEach(function (plat) {
+    archs.forEach(function (arch) {
+      pack(plat, arch)
+    })
+  })
+} else if (process.argv[2] && process.argv[3]) {
+	pack(process.argv[2], process.argv[3])
+} else {
+  // build for current platform only
+  pack(os.platform(), os.arch())
+}
+
+function pack (plat, arch) {
+  var outputPath = path.join('.', 'pkg', appVersion, plat, arch)
+
+  sh.exec('./node_modules/.bin/rimraf ' + outputPath)
+
+  // there is no darwin ia32 electron
+  if (plat === 'darwin' && arch === 'ia32') return
+
+  var cmd = electronPackager + ' . "' + appName + '"' +
+    ' --platform=' + plat +
+    ' --arch=' + arch +
+    ' --version=' + electronVersion +
+    ' --app-version' + appVersion +
+    ' --icon=' + icon +
+    ' --out=' + outputPath +
+    ' --prune' +
+    ' --ignore=pkg' // ignore the pkg directory or hilarity will ensue
+  console.log(cmd)
+  sh.exec(cmd)
+}