160 lines
		
	
	
	
		
			7.5 KiB
			
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			160 lines
		
	
	
	
		
			7.5 KiB
			
		
	
	
	
		
			Markdown
		
	
	
	
	
	
# Windows Store Guide
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With Windows 10, the good old win32 executable got a new sibling: The Universal
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Windows Platform. The new `.appx` format does not only enable a number of new
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powerful APIs like Cortana or Push Notifications, but through the Windows Store,
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also simplifies installation and updating.
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Microsoft [developed a tool that compiles Electron apps as `.appx` packages][electron-windows-store],
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enabling developers to use some of the goodies found in the new application
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model. This guide explains how to use it - and what the capabilities and
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limitations of an Electron AppX package are.
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## Background and Requirements
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Windows 10 "Anniversary Update" is able to run win32 `.exe` binaries by
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launching them together with a virtualized filesystem and registry. Both are
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created during compilation by running app and installer inside a Windows
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Container, allowing Windows to identify exactly which modifications to the
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operating system are done during installation. Pairing the executable with a
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virtual filesystem and a virtual registry allows Windows to enable one-click
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installation and uninstallation.
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In addition, the exe is launched inside the appx model - meaning that it can use
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many of the APIs available to the Universal Windows Platform. To gain even more
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capabilities, an Electron app can pair up with an invisible UWP background task
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launched together with the `exe` - sort of launched as a sidekick to run tasks
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in the background, receive push notifications, or to communicate with other UWP
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applications.
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To compile any existing Electron app, ensure that you have the following
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requirements:
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* Windows 10 with Anniversary Update (released August 2nd, 2016)
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* The Windows 10 SDK, [downloadable here][windows-sdk]
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* At least Node 4 (to check, run `node -v`)
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Then, go and install the `electron-windows-store` CLI:
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```sh
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npm install -g electron-windows-store
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```
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## Step 1: Package Your Electron Application
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Package the application using [electron-packager][electron-packager] (or a similar tool).
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Make sure to remove `node_modules` that you don't need in your final application, since
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any module you don't actually need will increase your application's size.
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The output should look roughly like this:
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```text
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├── Ghost.exe
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├── LICENSE
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├── content_resources_200_percent.pak
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├── content_shell.pak
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├── d3dcompiler_47.dll
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├── ffmpeg.dll
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├── icudtl.dat
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├── libEGL.dll
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├── libGLESv2.dll
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├── locales
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│   ├── am.pak
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│   ├── ar.pak
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│   ├── [...]
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├── natives_blob.bin
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├── node.dll
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├── resources
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│   ├── app
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│   └── atom.asar
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├── v8_context_snapshot.bin
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├── squirrel.exe
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└── ui_resources_200_percent.pak
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```
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## Step 2: Running electron-windows-store
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From an elevated PowerShell (run it "as Administrator"), run
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`electron-windows-store` with the required parameters, passing both the input
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and output directories, the app's name and version, and confirmation that
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`node_modules` should be flattened.
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```powershell
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electron-windows-store `
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    --input-directory C:\myelectronapp `
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    --output-directory C:\output\myelectronapp `
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    --flatten true `
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    --package-version 1.0.0.0 `
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    --package-name myelectronapp
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```
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Once executed, the tool goes to work: It accepts your Electron app as an input,
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flattening the `node_modules`. Then, it archives your application as `app.zip`.
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Using an installer and a Windows Container, the tool creates an "expanded" AppX
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package - including the Windows Application Manifest (`AppXManifest.xml`) as
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well as the virtual file system and the virtual registry inside your output
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folder.
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Once the expanded AppX files are created, the tool uses the Windows App Packager
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(`MakeAppx.exe`) to create a single-file AppX package from those files on disk.
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Finally, the tool can be used to create a trusted certificate on your computer
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to sign the new AppX package. With the signed AppX package, the CLI can also
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automatically install the package on your machine.
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## Step 3: Using the AppX Package
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In order to run your package, your users will need Windows 10 with the so-called
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"Anniversary Update" - details on how to update Windows can be found [here][how-to-update].
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In opposition to traditional UWP apps, packaged apps currently need to undergo a
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manual verification process, for which you can apply [here][centennial-campaigns].
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In the meantime, all users will be able to install your package by double-clicking it,
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so a submission to the store might not be necessary if you're looking for an
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easier installation method. In managed environments (usually enterprises), the
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`Add-AppxPackage` [PowerShell Cmdlet can be used to install it in an automated fashion][add-appxpackage].
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Another important limitation is that the compiled AppX package still contains a
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win32 executable - and will therefore not run on Xbox, HoloLens, or Phones.
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## Optional: Add UWP Features using a BackgroundTask
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You can pair your Electron app up with an invisible UWP background task that
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gets to make full use of Windows 10 features - like push notifications,
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Cortana integration, or live tiles.
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To check out how an Electron app that uses a background task to send toast
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notifications and live tiles, [check out the Microsoft-provided sample][background-task].
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## Optional: Convert using Container Virtualization
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To generate the AppX package, the `electron-windows-store` CLI uses a template
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that should work for most Electron apps. However, if you are using a custom
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installer, or should you experience any trouble with the generated package, you
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can attempt to create a package using compilation with a Windows Container - in
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that mode, the CLI will install and run your application in blank Windows Container
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to determine what modifications your application is exactly doing to the operating
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system.
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Before running the CLI for the first time, you will have to setup the "Windows Desktop App
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Converter". This will take a few minutes, but don't worry - you only have to do
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this once. Download and Desktop App Converter from [here][app-converter].
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You will receive two files: `DesktopAppConverter.zip` and `BaseImage-14316.wim`.
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1. Unzip `DesktopAppConverter.zip`. From an elevated PowerShell (opened with
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  "run as Administrator", ensure that your systems execution policy allows us to
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  run everything we intend to run by calling `Set-ExecutionPolicy bypass`.
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2. Then, run the installation of the Desktop App Converter, passing in the
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  location of the Windows base Image (downloaded as `BaseImage-14316.wim`), by
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  calling `.\DesktopAppConverter.ps1 -Setup -BaseImage .\BaseImage-14316.wim`.
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3. If running the above command prompts you for a reboot, please restart your
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  machine and run the above command again after a successful restart.
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Once installation succeeded, you can move on to compiling your Electron app.
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[windows-sdk]: https://developer.microsoft.com/en-us/windows/downloads/windows-10-sdk
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[app-converter]: https://docs.microsoft.com/en-us/windows/uwp/porting/desktop-to-uwp-run-desktop-app-converter
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[add-appxpackage]: https://technet.microsoft.com/en-us/library/hh856048.aspx
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[electron-packager]: https://github.com/electron-userland/electron-packager
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[electron-windows-store]: https://github.com/catalystcode/electron-windows-store
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[background-task]: https://github.com/felixrieseberg/electron-uwp-background
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[centennial-campaigns]: https://developer.microsoft.com/en-us/windows/projects/campaigns/desktop-bridge
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[how-to-update]: https://blogs.windows.com/windowsexperience/2016/08/02/how-to-get-the-windows-10-anniversary-update
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