Style guide notes.

docs/building.md

@@ -44,7 +44,7 @@ keypresses:
 
 #### setup
 
-Run this on initial checkout to pull down all dependencies and setup LLVM.
+Run this on initial checkout to pull down all dependencies and submodules.
 
     xb setup
 

docs/style_guide.md

@@ -0,0 +1,45 @@
+# Style Guide
+
+The style guide can be summed up as 'clang-format with the Google style set'.
+In addition, the [Google Style Guide](http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml)
+is followed and cpplint is the source of truth.
+
+Base rules:
+
+* 80 column line length max
+* LF (Unix-style) line endings
+* 2-space soft tabs, no TABs!
+* [Google Style Guide](http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml) for naming/casing/etc
+
+Code that really breaks from the formatting rules will not be accepted, as then
+no one else can use clang-format on the code without also touching all your
+lines.
+
+## Tools
+
+### clang-format
+
+clang-format with the Google style is used to format all files. I recommend
+installing/wiring it up to your editor of choice so that you don't even have to
+think about tabs and wrapping and such.
+
+#### Visual Studio
+
+Grab the official [experimental Visual Studio plugin](http://llvm.org/builds/).
+To switch to the Google style go Tools -> Options -> LLVM/Clang -> ClangFormat
+and set Style to Google. Then use ctrl-r/ctrl-f to trigger the formatting.
+Unfortunately it only does the cursor by default, so you'll have to select the
+whole doc and invoke it to get it all done.
+
+If you have a better option, let me know!
+
+#### Xcode
+
+Install [Alcatraz](http://alcatraz.io/) to get the [ClangFormat](https://github.com/travisjeffery/ClangFormat-Xcode)
+package. Set it to use the Google style and format on save. Never think about
+tabs or linefeeds or whatever again.
+
+### cpplint
+
+TODO(benvanik): write a cool script to do this/editor plugins.
+In the future, the linter will run as a git commit hook and on travis.