141 lines
5.4 KiB
Markdown
141 lines
5.4 KiB
Markdown
# autoUpdater
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> Enable apps to automatically update themselves.
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Process: [Main](../glossary.md#main-process)
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**See also: [A detailed guide about how to implement updates in your application](../tutorial/updates.md).**
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`autoUpdater` is an [EventEmitter][event-emitter].
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## Platform Notices
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Currently, only macOS and Windows are supported. There is no built-in support
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for auto-updater on Linux, so it is recommended to use the
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distribution's package manager to update your app.
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In addition, there are some subtle differences on each platform:
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### macOS
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On macOS, the `autoUpdater` module is built upon [Squirrel.Mac][squirrel-mac],
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meaning you don't need any special setup to make it work. For server-side
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requirements, you can read [Server Support][server-support]. Note that [App
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Transport Security](https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW35) (ATS) applies to all requests made as part of the
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update process. Apps that need to disable ATS can add the
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`NSAllowsArbitraryLoads` key to their app's plist.
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**Note:** Your application must be signed for automatic updates on macOS.
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This is a requirement of `Squirrel.Mac`.
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### Windows
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On Windows, you have to install your app into a user's machine before you can
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use the `autoUpdater`, so it is recommended that you use the
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[electron-winstaller][installer-lib], [electron-forge][electron-forge-lib] or the [grunt-electron-installer][installer] package to generate a Windows installer.
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When using [electron-winstaller][installer-lib] or [electron-forge][electron-forge-lib] make sure you do not try to update your app [the first time it runs](https://github.com/electron/windows-installer#handling-squirrel-events) (Also see [this issue for more info](https://github.com/electron/electron/issues/7155)). It's also recommended to use [electron-squirrel-startup](https://github.com/mongodb-js/electron-squirrel-startup) to get desktop shortcuts for your app.
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The installer generated with Squirrel will create a shortcut icon with an
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[Application User Model ID][app-user-model-id] in the format of
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`com.squirrel.PACKAGE_ID.YOUR_EXE_WITHOUT_DOT_EXE`, examples are
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`com.squirrel.slack.Slack` and `com.squirrel.code.Code`. You have to use the
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same ID for your app with `app.setAppUserModelId` API, otherwise Windows will
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not be able to pin your app properly in task bar.
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Unlike Squirrel.Mac, Windows can host updates on S3 or any other static file host.
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You can read the documents of [Squirrel.Windows][squirrel-windows] to get more details
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about how Squirrel.Windows works.
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## Events
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The `autoUpdater` object emits the following events:
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### Event: 'error'
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Returns:
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* `error` Error
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Emitted when there is an error while updating.
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### Event: 'checking-for-update'
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Emitted when checking if an update has started.
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### Event: 'update-available'
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Emitted when there is an available update. The update is downloaded
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automatically.
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### Event: 'update-not-available'
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Emitted when there is no available update.
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### Event: 'update-downloaded'
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Returns:
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* `event` Event
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* `releaseNotes` String
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* `releaseName` String
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* `releaseDate` Date
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* `updateURL` String
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Emitted when an update has been downloaded.
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On Windows only `releaseName` is available.
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**Note:** It is not strictly necessary to handle this event. A successfully
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downloaded update will still be applied the next time the application starts.
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### Event: 'before-quit-for-update'
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This event is emitted after a user calls `quitAndInstall()`.
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When this API is called, the `before-quit` event is not emitted before all windows are closed. As a result you should listen to this event if you wish to perform actions before the windows are closed while a process is quitting, as well as listening to `before-quit`.
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## Methods
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The `autoUpdater` object has the following methods:
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### `autoUpdater.setFeedURL(options)`
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* `options` Object
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* `url` String
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* `headers` Record<String, String> (optional) _macOS_ - HTTP request headers.
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* `serverType` String (optional) _macOS_ - Can be `json` or `default`, see the [Squirrel.Mac][squirrel-mac]
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README for more information.
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Sets the `url` and initialize the auto updater.
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### `autoUpdater.getFeedURL()`
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Returns `String` - The current update feed URL.
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### `autoUpdater.checkForUpdates()`
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Asks the server whether there is an update. You must call `setFeedURL` before
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using this API.
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### `autoUpdater.quitAndInstall()`
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Restarts the app and installs the update after it has been downloaded. It
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should only be called after `update-downloaded` has been emitted.
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Under the hood calling `autoUpdater.quitAndInstall()` will close all application
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windows first, and automatically call `app.quit()` after all windows have been
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closed.
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**Note:** It is not strictly necessary to call this function to apply an update,
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as a successfully downloaded update will always be applied the next time the
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application starts.
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[squirrel-mac]: https://github.com/Squirrel/Squirrel.Mac
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[server-support]: https://github.com/Squirrel/Squirrel.Mac#server-support
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[squirrel-windows]: https://github.com/Squirrel/Squirrel.Windows
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[installer]: https://github.com/electron/grunt-electron-installer
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[installer-lib]: https://github.com/electron/windows-installer
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[electron-forge-lib]: https://github.com/electron-userland/electron-forge
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[app-user-model-id]: https://msdn.microsoft.com/en-us/library/windows/desktop/dd378459(v=vs.85).aspx
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[event-emitter]: https://nodejs.org/api/events.html#events_class_eventemitter
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