Add initial documentation about the new tools repository and the
structure of how we're building concrete tools as well as tooling
infrastructure as part of the Clang project.

This documentation is definitely still rough. If anyone can improve it,
flesh it out, or help structure it in a more natural way, please, help!
=] This is not my forte, and patches here are more than welcome!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161855 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ClangTools.html b/docs/ClangTools.html
new file mode 100644
index 0000000..6124153
--- /dev/null
+++ b/docs/ClangTools.html
@@ -0,0 +1,118 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
+          "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<title>Clang Tools</title>
+<link type="text/css" rel="stylesheet" href="../menu.css">
+<link type="text/css" rel="stylesheet" href="../content.css">
+</head>
+<body>
+
+<!--#include virtual="../menu.html.incl"-->
+
+<div id="content">
+
+<h1>Clang Tools</h1>
+<p>Clang Tools are standalone commandline (and potentially GUI) tools design for
+use by C++ developers who are already using and enjoying Clang as their
+compiler. These tools provide developer-oriented functionality such as fast
+syntax checking, automatic formatting, refactoring, etc.</p>
+
+<p>Only a couple of the most basic and fundamental tools are kept in the primary
+Clang Subversion project. The rest of the tools are kept in a side-project so
+that developers who don't want or need to build them don't. If you want to get
+access to the extra Clang Tools repository, simply check it out into the tools
+tree of your Clang checkout and follow the usual process for building and
+working with a combined LLVM/Clang checkout:</p>
+<ul>
+  <li>With Subversion:
+  <ul>
+    <li><tt>cd llvm/tools/clang/tools</tt></li>
+    <li><tt>svn co http://llvm.org/svn/llvm-project/clang-tools-extra/trunk
+      extra</tt></li>
+  </ul>
+  </li>
+  <li>Or with Git:
+  <ul>
+    <li><tt>cd llvm/tools/clang/tools</tt></li>
+    <li><tt>git clone http://llvm.org/git/clang-tools-extra.git extra</tt></li>
+  </ul>
+  </li>
+</ul>
+
+<p>This document describes a high-level overview of the organization of Clang
+Tools within the project as well as giving an introduction to some of the more
+important tools. However, it should be noted that this document is currently
+focused on Clang and Clang Tool developers, not on end users of these tools.</p>
+
+<!-- ======================================================================= -->
+<h2 id="org">Clang Tools Organization</h2>
+<!-- ======================================================================= -->
+
+<p>Clang Tools are CLI or GUI programs that are intended to be directly used by
+C++ developers. That is they are <em>not</em> primarily for use by Clang
+developers, although they are hopefully useful to C++ developers who happen to
+work on Clang, and we try to actively dogfood their functionality. They are
+developed in three components: the underlying infrastructure for building
+a standalone tool based on Clang, core shared logic used by many different tools
+in the form of refactoring and rewriting libraries, and the tools
+themselves.</p>
+
+<p>The underyling infrastructure for Clang Tools is the
+<a href="LibTooling.html">LibTooling</a> platform. See its documentation for
+much more detailed information about how this infrastructuro works. The common
+refactoring and rewriting toolkit-style library is also part of LibTooling
+organizationally.</p>
+
+<p>A few Clang Tools are developed along side the core Clang libraries as
+examples and test cases of fundamental functionality. However, most of the tools
+are developed in a side repository to provide easy separation from the core
+libraries. We intentionally do not support public libraries in the side
+repository, as we want to carefully review and find good APIs for libraries as
+they are lifted out of a few tools and into the core Clang library set.</p>
+
+<p>Regardless of which repositiory Clang Tools' code resides in, the development
+process and practices for all Clang Tools are exactly those of Clang itself.
+They are entirely within the Clang <em>project</em>, regardless of the version
+control scheme.</p>
+
+
+<!-- ======================================================================= -->
+<h2 id="coretools">Core Clang Tools</h2>
+<!-- ======================================================================= -->
+
+<p>The core set of Clang tools that are within the main repository are tools
+that very specifically compliment, and allow use and testing of <em>Clang</em>
+specific functionality.</p>
+
+<h3 id="clang-check"><tt>clang-check</tt></h3>
+<p>This tool combines the LibTooling framework for running a Clang tool with the
+basic Clang diagnostics by syntax checking specific files in a fast, commandline
+interface. It can also accept flags to re-display the diagnostics in different
+formats with different flags, suitable for use driving an IDE or editor.</p>
+
+<p>FIXME: Link to user-oriented clang-check documentation.</p>
+
+<h3 id="clang-fixit"><tt>clang-fixit</tt></h3>
+<p>A tool which specifically applies the Clang fix-it hint diagnostic technogoy
+on top of a dedicated tool. It is designed to explore alternative interfaces for
+applying fix-it hints, including automatic application, prompting users with
+options for different fixes, etc.</p>
+
+<p>Note that the clang-fixit tool is planned, but not yet implemented.</p>
+
+<p>FIXME: Link to user-oriented clang-fixit documentation.</p>
+
+<!-- ======================================================================= -->
+<h2 id="registerplugin">Extra Clang Tools</h2>
+<!-- ======================================================================= -->
+
+<p>As various categories of Clang Tools are added to the extra repository,
+they'll be tracked here. The focus of this documentation is on the scope and
+features of the tools for other tool developers; each tool should provide its
+own user-focused documentation.</p>
+
+</div>
+</body>
+</html>
+
diff --git a/docs/Tooling.html b/docs/Tooling.html
index 4adaf16..74837f4 100644
--- a/docs/Tooling.html
+++ b/docs/Tooling.html
@@ -97,6 +97,23 @@
   <li>do not want to write your tools in C++</li>
 </ul>
 
+<!-- ======================================================================= -->
+<h2 id="clang-tools"><a href="ClangTools.html">Clang Tools</a></h2>
+<!-- ======================================================================= -->
+
+<p>These are a collection of specific developer tools built on top of the
+LibTooling infrastructure as part of the Clang project. They are targeted at
+automating and improving core development activities of C/C++ developers.</p>
+<p>Examples of tools we are building or planning as part of the Clang
+project:</p>
+<ul>
+  <li>Syntax checking (clang-check)</li>
+  <li>Automatic fixing of compile errors (clangc-fixit)</li>
+  <li>Automatic code formatting</li>
+  <li>Migration tools for new features in new language standards</li>
+  <li>Core refactoring tools</li>
+</ul>
+
 </div>
 </body>
 </html>
diff --git a/www/get_started.html b/www/get_started.html
index 2acd84b..7756f9e 100644
--- a/www/get_started.html
+++ b/www/get_started.html
@@ -58,6 +58,14 @@
     <li><tt>cd ../..</tt></li>
   </ul>
   </li>
+  <li>Checkout extra Clang Tools: (optional)
+  <ul>
+    <li><tt>cd llvm/tools/clang/tools</tt></li>
+    <li><tt>svn co http://llvm.org/svn/llvm-project/clang-tools-extra/trunk
+        extra</tt></li>
+    <li><tt>cd ../../../..</tt></li>
+  </ul>
+  </li>
   <li>Checkout Compiler-RT:
   <ul>
     <li><tt>cd llvm/projects</tt></li>