Reuse VS Code's Electron storage service for remote persistence

--- code-server.orig/lib/vscode/src/vs/platform/storage/electron-main/storageMainService.ts
+++ code-server/lib/vscode/src/vs/platform/storage/electron-main/storageMainService.ts
@@ -14 +14,6 @@
-import { ILifecycleMainService, LifecycleMainPhase, ShutdownReason } from '../../lifecycle/electron-main/lifecycleMainService.js';
+import type { ILifecycleMainService, ShutdownReason } from '../../lifecycle/electron-main/lifecycleMainService.js';
+
+// Keep these values local so the server does not load lifecycleMainService at runtime;
+// that module imports Electron, which is not present in the code-server server image.
+const LIFECYCLE_MAIN_PHASE_AFTER_WINDOW_OPEN = 3;
+const SHUTDOWN_REASON_KILL = 2;
@@ -101 +101 @@
-		@ILifecycleMainService private readonly lifecycleMainService: ILifecycleMainService,
+		private readonly lifecycleMainService: ILifecycleMainService,
@@ -117 +117 @@
-			await this.lifecycleMainService.when(LifecycleMainPhase.AfterWindowOpen);
+			await this.lifecycleMainService.when(LIFECYCLE_MAIN_PHASE_AFTER_WINDOW_OPEN);
@@ -256 +256 @@
-		if (this.shutdownReason === ShutdownReason.KILL) {
+		if (this.shutdownReason === SHUTDOWN_REASON_KILL) {
@@ -295 +295 @@
-		if (this.shutdownReason === ShutdownReason.KILL) {
+		if (this.shutdownReason === SHUTDOWN_REASON_KILL) {

--- code-server.orig/lib/vscode/src/vs/workbench/services/storage/electron-browser/storageService.ts
+++ code-server/lib/vscode/src/vs/workbench/services/storage/electron-browser/storageService.ts
@@ -6 +6 @@
-import { IMainProcessService } from '../../../../platform/ipc/common/mainProcessService.js';
+import { IRemoteService } from '../../../../platform/ipc/common/services.js';
@@ -22 +22 @@
-		mainProcessService: IMainProcessService,
+		remoteService: Pick<IRemoteService, 'getChannel'>,
@@ -25 +25 @@
-		super(workspace, { currentProfile: userDataProfileService.currentProfile, defaultProfile: userDataProfilesService.defaultProfile }, mainProcessService, workbenchEnvironmentService);
+		super(workspace, { currentProfile: userDataProfileService.currentProfile, defaultProfile: userDataProfilesService.defaultProfile }, remoteService as IRemoteService, workbenchEnvironmentService);
--- code-server.orig/lib/vscode/src/vs/server/node/serverEnvironmentService.ts
+++ code-server/lib/vscode/src/vs/server/node/serverEnvironmentService.ts
@@ -68,0 +69 @@
+	'enable-remote-storage': { type: 'boolean', cat: 'o', description: nls.localize('enable-remote-storage', 'Persist browser storage (settings, state, etc.) on the server instead of browser IndexedDB. Enables state portability across browsers/devices.') },
@@ -214,0 +216 @@
+	'enable-remote-storage'?: boolean;
--- code-server.orig/lib/vscode/src/vs/server/node/serverServices.ts
+++ code-server/lib/vscode/src/vs/server/node/serverServices.ts
@@ -107,0 +108,4 @@
+import { StorageDatabaseChannel } from '../../platform/storage/electron-main/storageIpc.js';
+import { StorageMainService } from '../../platform/storage/electron-main/storageMainService.js';
+import type { ILifecycleMainService } from '../../platform/lifecycle/electron-main/lifecycleMainService.js';
+import type { IUserDataProfilesMainService } from '../../platform/userDataProfile/electron-main/userDataProfile.js';
@@ -240,0 +245,15 @@
+	// Reuse the Electron storage service on the remote. The server has no
+	// windows, so its lifecycle is always ready and never loads a window.
+	const storageMainService = disposables.add(new StorageMainService(
+		logService,
+		environmentService,
+		userDataProfilesService as unknown as IUserDataProfilesMainService,
+		{
+			when: () => Promise.resolve(),
+			onWillLoadWindow: Event.None,
+			onWillShutdown: Event.None,
+		} as unknown as ILifecycleMainService,
+		fileService,
+		uriIdentityService,
+	));
+
@@ -419,6 +439,7 @@ export async function setupServerServices(connectionToken: ServerConnectionToken
 
 		const languagePackChannel = ProxyChannel.fromService<RemoteAgentConnectionContext>(accessor.get(ILanguagePackService), disposables);
 		socketServer.registerChannel('languagePacks', languagePackChannel);
+		socketServer.registerChannel('storage', disposables.add(new StorageDatabaseChannel(logService, storageMainService)));
 
 		// clean up extensions folder
 		remoteExtensionsScanner.whenExtensionsReady().then(() => extensionManagementService.cleanUp());
--- code-server.orig/lib/vscode/src/vs/server/node/webClientServer.ts
+++ code-server/lib/vscode/src/vs/server/node/webClientServer.ts
@@ -411 +411,2 @@
-			callbackRoute: callbackRoute
+			callbackRoute: callbackRoute,
+			remoteStorageEnabled: this._environmentService.args['enable-remote-storage'] ? true : undefined
--- code-server.orig/lib/vscode/src/vs/workbench/browser/web.api.ts
+++ code-server/lib/vscode/src/vs/workbench/browser/web.api.ts
@@ -413,0 +414,5 @@
+	/**
+	 * Persist workbench storage on the remote server instead of browser IndexedDB.
+	 */
+	readonly remoteStorageEnabled?: boolean;
+
--- code-server.orig/lib/vscode/src/vs/workbench/browser/web.main.ts
+++ code-server/lib/vscode/src/vs/workbench/browser/web.main.ts
@@ -35,0 +36 @@
+import { NativeWorkbenchStorageService } from '../services/storage/electron-browser/storageService.js';
@@ -479 +480 @@
-			this.createStorageService(workspace, logService, userDataProfileService).then(service => {
+			this.createStorageService(workspace, environmentService, logService, userDataProfileService, userDataProfilesService, remoteAgentService).then(service => {
@@ -601 +602,15 @@
-	protected async createStorageService(workspace: IAnyWorkspaceIdentifier, logService: ILogService, userDataProfileService: IUserDataProfileService): Promise<IStorageService> {
+	protected async createStorageService(workspace: IAnyWorkspaceIdentifier, environmentService: IBrowserWorkbenchEnvironmentService, logService: ILogService, userDataProfileService: IUserDataProfileService, userDataProfilesService: IUserDataProfilesService, remoteAgentService: IRemoteAgentService): Promise<IStorageService> {
+		const connection = remoteAgentService.getConnection();
+		if (this.configuration.remoteStorageEnabled && connection) {
+			const storageService = new NativeWorkbenchStorageService(workspace, userDataProfileService, userDataProfilesService, connection, environmentService);
+
+			try {
+				await storageService.initialize();
+				this.onWillShutdownDisposables.add(toDisposable(() => storageService.close()));
+				return storageService;
+			} catch (error) {
+				onUnexpectedError(error);
+				logService.error('Remote storage service initialization failed, falling back to browser storage', error);
+			}
+		}
+
--- code-server.orig/lib/vscode/src/vs/sessions/browser/web.main.ts
+++ code-server/lib/vscode/src/vs/sessions/browser/web.main.ts
@@ -42 +42 @@
-		_userDataProfilesService: BrowserUserDataProfilesService,
+		userDataProfilesService: BrowserUserDataProfilesService,
@@ -44 +44 @@
-		_remoteAgentService: IRemoteAgentService,
+		remoteAgentService: IRemoteAgentService,
@@ -85 +85 @@
-		const storageService = await this.createStorageService(workspaceIdentifier, logService, userDataProfileService);
+		const storageService = await this.createStorageService(workspaceIdentifier, environmentService, logService, userDataProfileService, userDataProfilesService, remoteAgentService);