Allow Atom to be installed on OS X

script/build

@@ -12,6 +12,7 @@ const copyAssets = require('./lib/copy-assets')
 const dumpSymbols = require('./lib/dump-symbols')
 const generateMetadata = require('./lib/generate-metadata')
 const generateModuleCache = require('./lib/generate-module-cache')
+const installApplication = require('./lib/install-application')
 const packageApplication = require('./lib/package-application')
 const prebuildLessCache = require('./lib/prebuild-less-cache')
 const transpileBabelPaths = require('./lib/transpile-babel-paths')
@@ -41,4 +42,10 @@ dumpSymbols()
     } else {
       console.log('Skipping code-signing. Specify the --code-sign option to perform code-signing...')
     }
+
+    if (argv.install) {
+      installApplication(packagedAppPath)
+    } else {
+      console.log('Skipping installation. Specify the --install option to install Atom...')
+    }
   })

script/lib/install-application.js

@@ -0,0 +1,19 @@
+'use strict'
+
+const fs = require('fs-extra')
+const path = require('path')
+
+module.exports = function (packagedAppPath) {
+  if (process.platform === 'darwin') {
+    const packagedAppPathFileName = path.basename(packagedAppPath)
+    const installationDirPath = path.join(path.sep, 'Applications', packagedAppPathFileName)
+    if (fs.existsSync(installationDirPath)) {
+      console.log(`Removing previously installed ${packagedAppPathFileName} at ${installationDirPath}...`)
+      fs.removeSync(installationDirPath)
+    }
+    console.log(`Installing ${packagedAppPath} at ${installationDirPath}...`)
+    fs.copySync(packagedAppPath, installationDirPath)
+  } else {
+    throw new Error("Not implemented yet.")
+  }
+}