How to Contribute

We'd love to accept your patches and contributions to this project. There are just a few small guidelines you need to follow.

Contributor License Agreement

Contributions to this project must be accompanied by a Contributor License Agreement. You (or your employer) retain the copyright to your contribution, this simply gives us permission to use and redistribute your contributions as part of the project. Head over to https://cla.developers.google.com/ to see your current agreements on file or to sign a new one.

You generally only need to submit a CLA once, so if you've already submitted one (even if it was for a different project), you probably don't need to do it again.

Code reviews

All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult GitHub Help for more information on using pull requests.

Project Standards

C++ code should follow Google's C++ style guide.
Objective-C code should follow Google's Objective-C style guide.
For C++ and Objective-C code, please run clang-format -style=file on files you have changed if possible. If you don't have clang-format, don't worry; a project member can do it prior to submission.
Dart code should follow the Dart style guide and use dartfmt.
Build scripts and other tooling should be written it Dart. (Some existing scripts are bash or .bat scripts; if you need to make non-trivial changes to one of those scripts, please convert it to Dart first if possible.)