Module app_update 

Typed application update discovery, verification, and platform installation.

An update is the one download an application performs that can replace the application, so what arrives is checked against what was promised before it reaches a platform installer. The check lives here, once, rather than in each platform’s installer: a digest computed four different ways is four chances to compute it wrongly, and one of them will be the one nobody tested.

Structs

AppUpdateCapabilities

What an update backend can do on this platform.

AppUpdateObserver

Registration returned by observe_app_update_status.

DigestVerifier

Checks a package as it is read, so a package too large to hold in memory is still checked.

GitHubReleaseUpdate

A GitHub release feed used to discover an application package.

PackageDigest

The digest a downloaded package must match.

UpdatePackage

A package an update would install.

Enums

AppUpdateError

Failure to start an update operation.

AppUpdateStatus

Observable state of the application update flow.

DigestAlgorithm

How a package’s bytes are checked against what the release promised.

Traits

AppUpdater

Platform implementation for update discovery and package installation.

Functions

app_update_capabilities

What this host can do about application updates.

app_update_checks_supported

Returns whether this host can discover a newer release.

app_update_status

Returns the latest update state.

app_updates_supported

Returns whether this host can install application updates.

check_for_app_update

Starts update discovery and publishes the initial state.

clear_platform_app_updater

Removes the platform updater.

install_app_update

Starts package installation and publishes the initial transfer state.

observe_app_update_status

Observes update state changes. The current state is delivered immediately.

set_app_update_status

Publishes state from a platform updater.

set_platform_app_updater

Installs the platform updater.

sha256_hex

The SHA-256 of bytes, as lower-case hexadecimal.

verify_package

Checks a package held in memory against digest.

Type Aliases

AppUpdaterRef

Shared updater service.