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CONTRIBUTING.md

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Contributing code to the opentitan repository

Contributor License Agreement

Contributions to OpenTitan must be accompanied by sign-off text that indicates acceptance of the Contributor License Agreement (see CLA for full text), which is closely derived from the Apache Individual Contributor License Agreement. The sign-off text must be included once per commit, in the commit message. The sign-off can be automatically inserted using a command such as git commit -s, which will generate the text in the form: Signed-off-by: Random J Developer <random@developer.example.org>

By adding this sign-off, you are certifying:

By signing-off on this submission, I agree to be bound by the terms of the Contributor License Agreement located at the root of the project repository, and I agree that this submission constitutes a "Contribution" under that Agreement.

Please note that this project and any contributions to it are public and that a record of all contributions (including any personal information submitted with it, including a sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.

Quick guidelines

  • Keep a clean commit history. This means no merge commits, and no long series of "fixup" patches (rebase or squash as appropriate). Structure work as a series of logically ordered, atomic patches. git rebase -i is your friend.
  • Changes should be made via pull request, with review. A pull request will be committed by a "committer" (an account listed in COMMITTERS) once it has had an explicit positive review.
  • When changes are restricted to a specific area, you are recommended to add a tag to the beginning of the first line of the commit message in square brackets. e.g. "[uart] Fix bug #157".
  • Code review is not design review and doesn't remove the need for discussing implementation options. If you would like to make a large-scale change or discuss multiple implementation options, discuss on the mailing list.
  • Create pull requests from a fork rather than making new branches in github.com/lowrisc/opentitan.
  • Do not attempt to commit code with a non-Apache license without discussing first.
  • If a relevant bug or tracking issue exists, reference it in the pull request and commits.

Please see Contributing to OpenTitan for more general guidance.