limit git repositories changes count behind option

src/vs/workbench/parts/git/browser/gitServices.ts

@@ -388,7 +388,7 @@ export class GitService extends ee.EventEmitter
 	private editorService: IWorkbenchEditorService;
 	private lifecycleService: ILifecycleService;
 	private outputService: IOutputService;
-	private raw: git.IRawGitService;
+	protected raw: git.IRawGitService;
 
 	private state: git.ServiceState;
 	private operations: git.IGitOperation[];
@@ -398,6 +398,7 @@ export class GitService extends ee.EventEmitter
 	private needsRefresh: boolean;
 	private refreshDelayer: async.ThrottledDelayer<void>;
 	private autoFetcher: AutoFetcher;
+	allowHugeRepositories: boolean;
 
 	get onOutput(): Event<string> { return this.raw.onOutput; }
 
@@ -410,7 +411,8 @@ export class GitService extends ee.EventEmitter
 		@IOutputService outputService: IOutputService,
 		@IWorkspaceContextService contextService: IWorkspaceContextService,
 		@ILifecycleService lifecycleService: ILifecycleService,
-		@IStorageService storageService: IStorageService
+		@IStorageService storageService: IStorageService,
+		@IConfigurationService private configurationService: IConfigurationService
 	) {
 		super();
 
@@ -431,6 +433,7 @@ export class GitService extends ee.EventEmitter
 		this.needsRefresh = false;
 		this.refreshDelayer = new async.PeriodThrottledDelayer<void>(500, 10000);
 		this.autoFetcher = this.instantiationService.createInstance(AutoFetcher, this);
+		this.allowHugeRepositories = false;
 
 		this.registerListeners();
 
@@ -474,6 +477,18 @@ export class GitService extends ee.EventEmitter
 		this.toDispose.push(this.eventService.addListener2(FileEventType.FILE_CHANGES,(e) => this.onFileChanges(e)));
 		this.toDispose.push(this.eventService.addListener2(filesCommon.EventType.FILE_SAVED, (e) => this.onTextFileChange(e)));
 		this.toDispose.push(this.eventService.addListener2(filesCommon.EventType.FILE_REVERTED, (e) => this.onTextFileChange(e)));
+		this.toDispose.push(this.configurationService.onDidUpdateConfiguration(() => {
+			if (this.allowHugeRepositories) {
+				return;
+			}
+
+			const config = this.configurationService.getConfiguration<git.IGitConfiguration>('git');
+			this.allowHugeRepositories = config.allowLargeRepositories;
+
+			if (this.allowHugeRepositories) {
+				this.triggerStatus(true);
+			}
+		}));
 		this.lifecycleService.onShutdown(this.dispose, this);
 	}
 
@@ -551,7 +566,20 @@ export class GitService extends ee.EventEmitter
 	}
 
 	public status(): winjs.Promise {
-		return this.run(git.ServiceOperations.STATUS, () => this.raw.status());
+		const config = this.configurationService.getConfiguration<git.IGitConfiguration>('git');
+
+		if (this.allowHugeRepositories || config.allowLargeRepositories) {
+			return this.run(git.ServiceOperations.STATUS, () => this.raw.status());
+		}
+
+		return this.raw.statusCount().then(count => {
+			if (count > 5000 && !this.allowHugeRepositories) {
+				this.transition(git.ServiceState.Huge);
+				return winjs.TPromise.as(this.model);
+			}
+
+			return this.run(git.ServiceOperations.STATUS, () => this.raw.status());
+		});
 	}
 
 	public init(): winjs.Promise {

src/vs/workbench/parts/git/browser/gitViewlet.ts

@@ -21,6 +21,7 @@ import gitless = require('vs/workbench/parts/git/browser/views/gitless/gitlessVi
 import notroot = require('vs/workbench/parts/git/browser/views/notroot/notrootView');
 import noworkspace = require('vs/workbench/parts/git/browser/views/noworkspace/noworkspaceView');
 import { DisabledView } from './views/disabled/disabledView';
+import { HugeView } from './views/huge/hugeView';
 import {IInstantiationService} from 'vs/platform/instantiation/common/instantiation';
 import {IProgressService, IProgressRunner} from 'vs/platform/progress/common/progress';
 import {ITelemetryService} from 'vs/platform/telemetry/common/telemetry';
@@ -61,7 +62,8 @@ export class GitViewlet
 			this.instantiationService.createInstance(gitless.GitlessView),
 			new notroot.NotRootView(),
 			new noworkspace.NoWorkspaceView(),
-			new DisabledView()
+			new DisabledView(),
+			this.instantiationService.createInstance(HugeView)
 		];
 
 		views.forEach(v => {
@@ -192,6 +194,9 @@ export class GitViewlet
 		} else if (this.gitService.getState() === git.ServiceState.NotAtRepoRoot) {
 			this.setView('notroot');
 			this.progressRunner = null;
+		} else if (this.gitService.getState() === git.ServiceState.Huge) {
+			this.setView('huge');
+			this.progressRunner = null;
 		} else if (this.gitService.isIdle()) {
 			this.setView('changes');
 			this.progressRunner = null;

src/vs/workbench/parts/git/browser/gitWorkbenchContributions.ts

@@ -532,6 +532,11 @@ export function registerContributions(): void {
 				type: 'boolean',
 				description: nls.localize('gitLongCommit', "Whether long commit messages should be warned about."),
 				default: true
+			},
+			'git.allowLargeRepositories': {
+				type: 'boolean',
+				description: nls.localize('gitLargeRepos', "Always allow large repositories to be managed by Code."),
+				default: false
 			}
 		}
 	});

src/vs/workbench/parts/git/browser/views/huge/hugeView.css

@@ -0,0 +1,12 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+.git-viewlet > .huge-view {
+	padding: 0 20px 0 20px;
+}
+
+.git-viewlet > .huge-view > p {
+	line-height: 1.5em;
+}

src/vs/workbench/parts/git/browser/views/huge/hugeView.ts

@@ -0,0 +1,83 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import 'vs/css!./hugeView';
+import nls = require('vs/nls');
+import winjs = require('vs/base/common/winjs.base');
+import ee = require('vs/base/common/eventEmitter');
+import view = require('vs/workbench/parts/git/browser/views/view');
+import builder = require('vs/base/browser/builder');
+import actions = require('vs/base/common/actions');
+import * as dom from 'vs/base/browser/dom';
+import { IGitService } from 'vs/workbench/parts/git/common/git';
+import { onUnexpectedError } from 'vs/base/common/errors';
+import {Button} from 'vs/base/browser/ui/button/button';
+
+const $ = dom.emmet;
+
+export class HugeView extends ee.EventEmitter implements view.IView {
+
+	ID = 'huge';
+	private _element: HTMLElement;
+
+	constructor(@IGitService private gitService: IGitService) {
+		super();
+	}
+
+	get element(): HTMLElement {
+		if (!this._element) {
+			this.render();
+		}
+
+		return this._element;
+	}
+
+	private render(): void {
+		this._element = $('.huge-view');
+
+		dom.append(this._element, $('p')).textContent = nls.localize('huge', "Your repository appears to have many active changes.\nThis can cause Code to become very slow.");
+
+		const settingP = dom.append(this._element, $('p'));
+		dom.append(settingP, document.createTextNode(nls.localize('setting', "You can permanently disable this warning with the following setting:")));
+		dom.append(settingP, document.createTextNode(' '));
+		const pre = dom.append(settingP, $('pre'));
+		pre.style.display = 'inline';
+		pre.textContent = 'git.allowLargeRepositories';
+
+		const button = new Button(this._element);
+		button.label = nls.localize('allo', "Allow large repositories");
+		button.addListener2('click', (e) => {
+			dom.EventHelper.stop(e);
+			this.gitService.allowHugeRepositories = true;
+			this.gitService.status().done(null, onUnexpectedError);
+		});
+	}
+
+	focus(): void {
+		return;
+	}
+
+	layout(dimension: builder.Dimension): void {
+		return;
+	}
+
+	setVisible(visible:boolean): winjs.TPromise<void> {
+		return winjs.TPromise.as(null);
+	}
+
+	getControl(): ee.IEventEmitter {
+		return null;
+	}
+
+	getActions(): actions.IAction[] {
+		return [];
+	}
+
+	getSecondaryActions(): actions.IAction[] {
+		return [];
+	}
+}

src/vs/workbench/parts/git/common/git.ts

@@ -154,6 +154,7 @@ export enum ServiceState {
 	NotARepo,
 	NotAtRepoRoot,
 	OK,
+	Huge,
 	NoGit,
 	Disabled,
 	NotAWorkspace
@@ -231,6 +232,7 @@ export interface IGitConfiguration {
 	path: string;
 	autofetch: boolean;
 	enableLongCommitWarning: boolean;
+	allowLargeRepositories: boolean;
 }
 
 // Service interfaces
@@ -264,6 +266,7 @@ export interface IRawGitService {
 	onOutput: Event<string>;
 	getVersion(): TPromise<string>;
 	serviceState(): TPromise<RawServiceState>;
+	statusCount(): TPromise<number>;
 	status(): TPromise<IRawStatus>;
 	init(): TPromise<IRawStatus>;
 	add(filesPaths?: string[]): TPromise<IRawStatus>;
@@ -289,6 +292,7 @@ export var IGitService = createDecorator<IGitService>(GIT_SERVICE_ID);
 
 export interface IGitService extends IEventEmitter {
 	serviceId: ServiceIdentifier<any>;
+	allowHugeRepositories: boolean;
 	onOutput: Event<string>;
 	status(): TPromise<IModel>;
 	init(): TPromise<IModel>;

src/vs/workbench/parts/git/common/gitIpc.ts

@@ -13,6 +13,7 @@ import { IRawGitService, RawServiceState, IRawStatus, IPushOptions, IAskpassServ
 export interface IGitChannel extends IChannel {
 	call(command: 'getVersion'): TPromise<string>;
 	call(command: 'serviceState'): TPromise<RawServiceState>;
+	call(command: 'statusCount'): TPromise<number>;
 	call(command: 'status'): TPromise<IRawStatus>;
 	call(command: 'init'): TPromise<IRawStatus>;
 	call(command: 'add', filesPaths?: string[]): TPromise<IRawStatus>;
@@ -42,7 +43,7 @@ export class GitChannel implements IGitChannel {
 		switch (command) {
 			case 'getVersion': return this.service.then(s => s.getVersion());
 			case 'serviceState': return this.service.then(s => s.serviceState());
-			case 'status': return this.service.then(s => s.status());
+			case 'statusCount': return this.service.then(s => s.statusCount());
 			case 'status': return this.service.then(s => s.status());
 			case 'init': return this.service.then(s => s.init());
 			case 'add': return this.service.then(s => s.add(args));
@@ -90,6 +91,10 @@ export class GitChannelClient implements IRawGitService {
 		return this.channel.call('serviceState');
 	}
 
+	statusCount(): TPromise<number> {
+		return this.channel.call('statusCount');
+	}
+
 	status(): TPromise<IRawStatus> {
 		return this.channel.call('status');
 	}

src/vs/workbench/parts/git/common/noopGitService.ts

@@ -30,6 +30,10 @@ export class NoOpGitService implements IRawGitService {
 		return TPromise.as(RawServiceState.OK);
 	}
 
+	statusCount(): TPromise<number> {
+		return TPromise.as(0);
+	}
+
 	status(): TPromise<IRawStatus> {
 		return TPromise.as(NoOpGitService.STATUS);
 	}

src/vs/workbench/parts/git/electron-browser/electronGitService.ts

@@ -198,6 +198,6 @@ export class ElectronGitService extends GitService {
 			raw = new GitChannelClient(channel);
 		}
 
-		super(raw, instantiationService, eventService, messageService, editorService, outputService, contextService, lifecycleService, storageService);
+		super(raw, instantiationService, eventService, messageService, editorService, outputService, contextService, lifecycleService, storageService, configurationService);
 	}
 }

src/vs/workbench/parts/git/node/rawGitService.ts

@@ -50,6 +50,10 @@ export class RawGitService implements IRawGitService {
 		);
 	}
 
+	statusCount(): TPromise<number> {
+		return this.status().then(r => r.status.length);
+	}
+
 	status(): TPromise<IRawStatus> {
 		return this.repo.getStatus()
 			.then(status => this.repo.getHEAD()