Create the Next Generation of depot_tools. Eh.

depot_tools/gclient.bat

+@echo off
+:: Copyright (c) 2009 The Chromium Authors. All rights reserved.
+:: Use of this source code is governed by a BSD-style license that can be
+:: found in the LICENSE file.
+
+:: This file is a stub to sync .\bootstrap first and defer control to
+:: .\bootstrap\gclient.bat, which will sync back '.'. This is unless auto
+:: update is disabled, were gclient.py is directly called.
+
+:: Shall skip automatic update?
+IF "%DEPOT_TOOLS_UPDATE%" == "0" GOTO :SKIP_UPDATE
+:: We can't sync if .\.svn\. doesn't exist.
+IF NOT EXIST "%~dp0.svn" GOTO :SKIP_UPDATE
+
+:: Will download svn and python if not already installed on the system.
+call "%~dp0bootstrap\win\win_tools.bat"
+if errorlevel 1 goto :EOF
+
+:: Sync the bootstrap directory *only after*.
+call svn up -q "%~dp0bootstrap"
+:: still continue even in case of error.
+goto :UPDATE
+
+
+:SKIP_UPDATE
+:: Don't bother to try to update any thing.
+python "%~dp0\gclient.py" %*
+goto :EOF
+
+
+:UPDATE
+:: Transfer control to ease the update process. The following lines won't be
+:: executed so don't add any! Specifically, don't use 'call' in the following
+:: line.
+"%~dp0bootstrap\gclient.bat" %*
+goto :EOF