Merge from master

src/vs/code/electron-browser/sharedProcess/contrib/storageDataCleaner.ts

@@ -0,0 +1,57 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { IEnvironmentService } from 'vs/platform/environment/common/environment';
+import { join } from 'path';
+import { readdir, readFile, rimraf } from 'vs/base/node/pfs';
+import { onUnexpectedError } from 'vs/base/common/errors';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
+import { IBackupWorkspacesFormat } from 'vs/platform/backup/common/backup';
+
+export class StorageDataCleaner extends Disposable {
+
+	// Workspace/Folder storage names are MD5 hashes (128bits / 4 due to hex presentation)
+	private static NON_EMPTY_WORKSPACE_ID_LENGTH = 128 / 4;
+
+	constructor(
+		@IEnvironmentService private environmentService: IEnvironmentService
+	) {
+		super();
+
+		this.cleanUpStorageSoon();
+	}
+
+	private cleanUpStorageSoon(): void {
+		let handle: any = setTimeout(() => {
+			handle = void 0;
+
+			// Leverage the backup workspace file to find out which empty workspace is currently in use to
+			// determine which empty workspace storage can safely be deleted
+			readFile(this.environmentService.backupWorkspacesPath, 'utf8').then(contents => {
+				const workspaces = JSON.parse(contents) as IBackupWorkspacesFormat;
+				const emptyWorkspaces = workspaces.emptyWorkspaceInfos.map(info => info.backupFolder);
+
+				// Read all workspace storage folders that exist
+				return readdir(this.environmentService.workspaceStorageHome).then(storageFolders => {
+					const deletes: Promise<void>[] = [];
+
+					storageFolders.forEach(storageFolder => {
+						if (storageFolder.length === StorageDataCleaner.NON_EMPTY_WORKSPACE_ID_LENGTH) {
+							return;
+						}
+
+						if (emptyWorkspaces.indexOf(storageFolder) === -1) {
+							deletes.push(rimraf(join(this.environmentService.workspaceStorageHome, storageFolder)));
+						}
+					});
+
+					return Promise.all(deletes);
+				});
+			}).then(null, onUnexpectedError);
+		}, 30 * 1000);
+
+		this._register(toDisposable(() => clearTimeout(handle)));
+	}
+}