Want to contribute? Great! You can do so through the standard GitHub pull request model. For large contributions we do encourage you to file a ticket in the GitHub issues tracking system prior to any code development to coordinate with the team early in the process. Coordinating up front helps to avoid frustration later on. Please properly document your code and follow the Google C++ Style Guide.
Your contribution must be licensed under the Apache-2.0 license, the license used by this project.
Include a copyright notice and license in each new file to be contributed, consistent with the style used by this project. If your contribution contains code under the copyright of a third party, document its origin, license, and copyright holders.
This project tracks patch provenance and licensing using a modified Developer Certificate of Origin (DCO; from OSDL) and Signed-off-by tags initially developed by the Linux kernel project.
Developer's Certificate of Origin. Version 1.0
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the "Apache License, Version 2.0"
("Apache-2.0"); or
(b) The contribution is based upon previous work that is covered by
an appropriate open source license and I have the right under
that license to submit that work with modifications, whether
created in whole or in part by me, under the Apache-2.0 license;
or
(c) The contribution was provided directly to me by some other
person who certified (a) or (b) and I have not modified it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
metadata and personal information I submit with it, including my
sign-off) is maintained indefinitely and may be redistributed
consistent with this project and the requirements of the Apache-2.0
license or any open source license(s) involved, where they are
relevant.
(e) I am granting the contribution to this project under the terms of
Apache-2.0.
http://www.apache.org/licenses/LICENSE-2.0
With the sign-off in a commit message you certify that you authored the patch or otherwise have the right to submit it under an open source license. The procedure is simple: To certify above this package's Developer's Certificate of Origin 1.0 for your contribution just append a line
Signed-off-by: Random J Developer <random@developer.example.org>
to every commit message using your real name or your pseudonym and a valid email address.
If you have set your user.name and user.email git configs you can
automatically sign the commit by running the git-commit command with the -s
option. There may be multiple sign-offs if more than one developer was
involved in authoring the contribution.
For a more detailed description of this procedure, please see SubmittingPatches which was extracted from the Linux kernel project, and which is stored in an external repository.
Often employers or academic institution have ownership over code that is written in certain circumstances, so please do due diligence to ensure that you have the right to submit the code.
If you are a developer who is authorized to contribute to this package on behalf of your employer, then please use your corporate email address in the Signed-off-by tag. Otherwise please use a personal email address.
Each contributor is responsible for identifying themselves in the NOTICE file, the project's list of copyright holders and authors. Please add the respective information corresponding to the Signed-off-by tag as part of your first pull request.
If you are a developer who is authorized to contribute to this package on behalf of your employer, then add your company / organization to the list of copyright holders in the NOTICE file. As author of a corporate contribution you can also add your name and corporate email address as in the Signed-off-by tag.
If your contribution is covered by this project's DCO's clause "(c) The contribution was provided directly to me by some other person who certified (a) or (b) and I have not modified it", please add the appropriate copyright holder(s) to the NOTICE file as part of your contribution.