format: Fix incorrect dewrap of `if`

When `if (...stuff...) {` was exactly 81 characters, it would be
incorrectly wrapped because the trailing { wasn't being taken into
account in penalizing single line formatting.

To avoid this, pass the full suffix into the child formatter.

In a Chromium tree, diffing

  gn ls-files '*.gn' '*.gni' | xargs -l1 gn format

vs.

  gn ls-files '*.gn' '*.gni' | xargs -l1 /work/gn/out/gn format

results in
https://gist.github.com/sgraham/2e33ae36db6255af0be0785ea3d0b058

which are all 81 character long if statements being fixed.

Bug: gn:36

Change-Id: I5af9a62a3de4953ea0d60a85bd558281410a8f09
Reviewed-on: https://gn-review.googlesource.com/c/3621
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Petr Hosek <phosek@google.com>
Commit-Queue: Scott Graham <scottmg@google.com>
4 files changed
tree: 3de7c54f04b38ada4efabeb0fcb608f8cf9c5431
  1. base/
  2. build/
  3. docs/
  4. infra/
  5. tools/
  6. util/
  7. .clang-format
  8. .editorconfig
  9. .gitignore
  10. .style.yapf
  11. AUTHORS
  12. LICENSE
  13. OWNERS
  14. README.md
README.md

GN

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 https://gn.googlesource.com/gn
cd gn
python build/gen.py
ninja -C out
# To run tests:
out/gn_unittests

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 https://gn-review.googlesource.com.

... 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’).

Community

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