feat(desktop): self-update appimages in place (#2843)

fluxer_app/src/features/app/state/Updater.ts

@@ -696,10 +696,14 @@ class Updater {
 		} finally {
 			this.transition({type: 'manualDownload.finished'});
 		}
-		await this.downloadManualNativeUpdateOrOpen(currentOption.url, currentOption.suggestedName);
+		await this.downloadManualNativeUpdateOrOpen(currentOption.url, currentOption.suggestedName, currentOption.sha256);
 	}
 
-	private async downloadManualNativeUpdateOrOpen(url: string, suggestedName?: string): Promise<void> {
+	private async downloadManualNativeUpdateOrOpen(
+		url: string,
+		suggestedName?: string,
+		sha256?: string | null,
+	): Promise<void> {
 		if (this.manualNativeDownloadInFlight) {
 			return;
 		}
@@ -708,10 +712,16 @@ class Updater {
 			const outcome = await downloadWithNative({
 				url,
 				suggestedName: suggestedName ?? this.getManualUpdateSuggestedName(url),
+				sha256,
 			});
 			if (outcome === 'success' || outcome === 'canceled') {
 				return;
 			}
+			if (outcome === 'checksum-mismatch') {
+				logger.error('Native manual update download did not match its published checksum', {url});
+				pushDesktopUpdateDownloadFailedModal();
+				return;
+			}
 			logger.warn('Native manual update download unavailable; opening update URL externally', {outcome});
 			await openExternalUrl(url);
 		} finally {

fluxer_app/src/features/app/utils/UpdaterPlatformUtils.ts

@@ -5,5 +5,5 @@ export function shouldShowNativeDesktopUpdateInApp(platform: string | null | und
 }
 
 export function shouldShowNativeDesktopUpdateDownloadProgress(platform: string | null | undefined): boolean {
-	return platform === 'win32';
+	return platform === 'win32' || platform === 'linux';
 }