Updater example

A minimal Wails v3 application that ships in-app updates from a GitHub release. Demonstrates:

Configuring app.Updater with a single Provider (GitHub Releases)
Wiring a menu item to app.Updater.CheckAndInstall
Subscribing to updater:* events from both Go and JavaScript

Run

go run .

Out of the box the example reports itself as v1.0.0 and points at wailsapp/updater-demo, which publishes a v2.0.0 release for darwin/arm64, linux/amd64, and windows/amd64. Click App → Check for Updates… and the flow runs end-to-end: download, SHA256 verify, atomic swap, restart into the new binary.

Override the defaults via env to point at your own repo:

APP_VERSION=1.0.0 GH_REPOSITORY=your-org/your-repo go run .

Customising the update window

The framework opens a default window with release notes, a progress bar, and Install / Skip / Remind / Cancel buttons. Override:

CSS only: Window: &updater.BuiltinWindow{CSS: …}
Full template: Window: &updater.BuiltinWindow{HTML: …}
Window chrome: Window: &updater.BuiltinWindow{Options: …}
Headless: Window: updater.WindowNone

Verification

Out of the box the example uses digest verification: the GitHub provider is configured with ChecksumAsset: "SHA256SUMS", the demo's release ships that sidecar, and the framework refuses to install an artifact whose SHA-256 doesn't match what the sidecar declares.

For stronger trust, layer on signature verification by setting publicKey in main.go to your project's Ed25519 / Ed25519ph / ECDSA-P256 public key. The framework refuses to install a signed release when no key is configured — by design. The demo doesn't sign its releases, so leave publicKey empty when running against wailsapp/updater-demo.