Add packager build script

This add lots of missing options for packaging Electron apps correctly
for all platforms.

bin/build.js

@@ -0,0 +1,103 @@
+#!/usr/bin/env node
+
+var cp = require('child_process')
+var electronPackager = require('electron-packager')
+var fs = require('fs')
+var path = require('path')
+var pkg = require('../package.json')
+
+var all = {
+  // Build 64 bit binaries only.
+  arch: 'x64',
+
+  // The application source directory.
+  dir: path.join(__dirname, '..'),
+
+  // The release version of the application. Maps to the `ProductVersion` metadata
+  // property on Windows, and `CFBundleShortVersionString` on OS X.
+  'app-version': pkg.version,
+
+  // Package the application's source code into an archive, using Electron's archive
+  // format. Mitigates issues around long path names on Windows and slightly speeds up
+  // require().
+  asar: false,
+
+  // The build version of the application. Maps to the FileVersion metadata property on
+  // Windows, and CFBundleVersion on OS X. We're using the short git hash (e.g. 'e7d837e')
+  'build-version': cp.execSync('git rev-parse --short HEAD').toString().replace('\n', ''),
+
+  // Pattern which specifies which files to ignore when copying files to create the
+  // package(s).
+  ignore: /^\/(dist|resources\/screenshot.png)$/,
+
+  // The base directory where the finished package(s) are created.
+  out: path.join(__dirname, '..', 'dist'),
+
+  // Replace an already existing output directory.
+  overwrite: true,
+
+  // Runs `npm prune --production` which remove the packages specified in
+  // "devDependencies" before starting to package the app.
+  prune: true,
+
+  // The Electron version with which the app is built (without the leading 'v')
+  version: pkg.devDependencies['electron-prebuilt']
+}
+
+var darwin = {
+  platform: 'darwin',
+
+  // The bundle identifier to use in the application's plist (OS X only).
+  'app-bundle-id': 'io.webtorrent.app',
+
+  // The application category type, as shown in the Finder via "View" -> "Arrange by
+  // Application Category" when viewing the Applications directory (OS X only).
+  'app-category-type': 'public.app-category.utilities',
+
+  // The bundle identifier to use in the application helper's plist (OS X only).
+  'helper-bundle-id': 'io.webtorrent.app.helper',
+}
+
+var win32 = {
+  platform: 'win32',
+
+  // Object hash of application metadata to embed into the executable (Windows only)
+  'version-string': {
+
+    // Company that produced the file.
+    CompanyName: 'WebTorrent',
+
+    // Copyright notices that apply to the file. This should include the full text of all
+    // notices, legal symbols, copyright dates, and so on.
+    LegalCopyright: fs.readFileSync(path.join(__dirname, '..', 'LICENSE'), 'utf8'),
+
+    // File description to be presented to users.
+    FileDescription: 'Streaming torrent client',
+
+    // Original name of the file, not including a path. This information enables an
+    // application to determine whether a file has been renamed by a user. The format of
+    // the name depends on the file system for which the file was created.
+    OriginalFilename: 'WebTorrent.exe',
+
+    // Name of the product with which the file is distributed.
+    ProductName: 'WebTorrent',
+
+    // Internal name of the file, if one exists, for example, a module name if the file
+    // is a dynamic-link library. If the file has no internal name, this string should be
+    // the original filename, without extension. This string is required.
+    InternalName: 'WebTorrent'
+  },
+}
+
+var linux = {
+  platform: 'linux'
+}
+
+electronPackager(Object.assign({}, all, darwin), done)
+electronPackager(Object.assign({}, all, win32), done)
+electronPackager(Object.assign({}, all, linux), done)
+
+function done (err, appPath) {
+  if (err) console.error(err.message || err)
+  else console.log('Built ' + appPath)
+}

package.json

@@ -45,7 +45,7 @@
     "url": "git://github.com/feross/webtorrent-app.git"
   },
   "scripts": {
-    "build": "electron-packager . $npm_package_productName --overwrite --out=dist --ignore='^/dist$' --prune --asar --all --version=$npm_package_devDependencies_electron_prebuilt",
+    "build": "node ./bin/build.js",
     "debug": "DEBUG=* electron .",
     "start": "electron .",
     "test": "standard",