velopack_flutter

A Flutter implementation of Velopack using flutter_rust_bridge for automated desktop app updates.

Why Velopack?

Flutter currently lacks a robust solution for distributing auto-updates for desktop applications, aside from the Microsoft and Mac App Stores. Velopack addresses this gap by providing a cross-platform installation and auto-update framework for desktop applications.

Learn more about Velopack at https://velopack.io/

This project leverages flutter_rust_bridge to interface with the Rust implementation of Velopack.

Getting Started

1. Make sure rust is installed: https://www.rust-lang.org/tools/install

2. Add the velopack_flutter dependency to your pubspec.yaml:

dependencies:
  velopack_flutter: ^0.1.0

3. Import the package, initialize the Rust library and handle Velopack app hooks in your main.dart:

import 'package:flutter/material.dart';
import 'package:velopack_flutter/velopack_flutter.dart';

Future<void> main(List<String> args) async {
  await RustLib.init();

  final veloCommands = ['--veloapp-install', '--veloapp-updated', '--veloapp-obsolete', '--veloapp-uninstall'];
  if (veloCommands.any((cmd) => args.contains(cmd))) {
    exit(0);
  }

  /* You can now call the API functions shown in the API section. E.g isUpdateAvailable(url: ...);
     Do note that the API functions will only function correctly in a vpk packed release.
     isUpdateAvailable and the rest will just throw an exception if you call them while debugging.
  */
  runApp(const MyApp());
}

API

Function	Description
isUpdateAvailable(String url)	Checks the specified URL for an update and returns a boolean.
updateAndRestart(String url)	Checks for an update, downloads and applies it, then restarts the app.
updateAndExit(String url)	Checks for an update, downloads and applies it, then exits the app.
waitExitThenUpdate(String url)	Checks for an update, downloads it, and applies it after the app has been closed. Will close automatically after 60 seconds.

Packaging

1. Install .NET Core SDK 6.0 and the vpk tool:

dotnet tool update -g vpk

2. Build your Flutter app:

flutter build [windows|macos|linux] --release

3. Navigate to your release build directory:

cd build/windows/x64/runner

4. Package your app using vpk:

vpk pack --packId YourAppId --packVersion 1.0.0 --packDir Release --mainExe YourApp.exe

Your release package will be generated in the Releases directory.

For more information on packaging and distribution, refer to:

• Velopack Packaging Documentation
• Velopack Distribution Documentation

Using Github releases as your updates location

There is an issue (velopack/velopack#254) in the velopack repo about adding full api support for github releases. In the meantime you can still use github releases with a few workarounds:

Download step (before packing the release)

Run the download command before packing to include the latest information from your github releases

vpk download github --repoUrl https://github.com/{orgOrUser}/{repoName}

Then pack as normal.

Uploading

vpk upload github --repoUrl https://github.com/{orgOrUser}/{repoName} --publish --releaseName YourDesiredReleaseName --tag v1.0.0 --token your_github_token

Using the API in your flutter app

velopack expects all the files to be available at the given url. One way to accomplish this with github releases is to specify ${repoUrl}releases/download/${tagName}/ as the url to isUpdateAvailable or any other api function. This does require you to parse out the tag for the latest release manually yourself, e.g.:

final url = Uri.parse('${repoUrl}releases/latest/');
final response = await http.get(url);
if (response.statusCode == 200) {
  final data = json.decode(response.body);
  final tag_name = data['tag_name']
}

Notes

• The Linux implementation is currently untested. Contributions and feedback from Linux users are welcome.
• The API may differ from Velopack implementations in other languages and is not feature-complete. In the long-term it would make sense to keep these consistent, however I didn't have time for this yet. Feel free to open a PR!

Contributing

If you encounter issues, have suggestions, or want to contribute code, please open an issue or submit a pull request on this GitHub repository.