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.
To keep the source consistent, readable, diffable and easy to merge, we use a fairly rigid coding style, as defined by the google-styleguide project. All patches will be expected to conform to the style outlined here.
Note that for public interfaces that are intended to be P0214 conforming, use the proposed name; otherwise use the name style suggested by the style guide.
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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.
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If you are a Googler, it is preferable to first create an internal CL and have it reviewed and submitted. All these changes will be manually rebased to upstream, until we automate this.
Prerequisites for building and running tests are listed in README.md