format: Ensure that formatting always reaches a fixedpoint in one run

The .golden for this is ugly, but follows existing sources formatting e.g. in
This at least causes formatting to reach a fixed point in one step, which is
the more annoying bug.

In practice, the user will probably fix the sorting to the actual desired
formatting by manually sorting as was done in

Bug: gn:40

Test: CQ
Change-Id: Id3fea2564ae34156ac77e7445acd3f18bb4d161f
Reviewed-by: Nico Weber <>
Reviewed-by: Scott Graham <>
Commit-Queue: Scott Graham <>
4 files changed
tree: 9cde6bc20a37e5eabcbd1ab37c4f6ebbdca93e43
  1. .clang-format
  2. .editorconfig
  3. .gitignore
  4. .style.yapf
  9. base/
  10. build/
  11. docs/
  12. infra/
  13. tools/
  14. util/


GN is a meta-build system that generates build files for Ninja. There is documentation in docs/ and a presentation on it.

Getting started

You can download the latest version of GN binary for Linux, macOS and Windows.

Alternatively, you can build GN from source:

git clone
cd gn
python build/
ninja -C out
# To run tests:

On Windows, it is expected that cl.exe, link.exe, and lib.exe can be found in PATH, so you'll want to run from a Visual Studio command prompt, or similar.

On Linux and Mac, the default compiler is clang++, a recent version is expected to be found in PATH. This can be overridden by setting CC, CXX, and AR.

Reporting bugs

If you find a bug, you can see if it is known or report it in the bug database.

Sending patches

GN uses Gerrit for code review. The short version of how to patch is:

Register at

... edit code ...
ninja -C out && out/gn_unittests

Then, to upload a change for review:

git commit
git cl upload --gerrit

When revising a change, use:

git commit --amend
git cl upload --gerrit

which will add the new changes to the existing code review, rather than creating a new one.

We ask that all contributors sign Google's Contributor License Agreement (either individual or corporate as appropriate, select ‘any other Google project’).


You may ask questions and follow along w/ GN‘s development on Chromium’s gn-dev@ Google Group.