Authors retain copyright of their contributions to ARTIQ, but whenever possible
should use the GNU GPL version 3 license for them to be merged.

Works of US government employees are not copyrighted but can also be merged.

We've introduced a "sign-off" procedure on patches that are being sent around.

The sign-off is a simple line at the end of the explanation for the
patch, which certifies that you wrote it or otherwise have the right to
pass it on as an open-source patch.  The rules are pretty simple: if you
can certify the below:

        Developer's Certificate of Origin (1.1 from the Linux kernel)

        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 open source license
            indicated in the file; or

        (b) The contribution is based upon previous work that, to the best
            of my knowledge, is covered under 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 same open source license (unless I am
            permitted to submit under a different license), as indicated
            in the file; or

        (c) The contribution was provided directly to me by some other
            person who certified (a), (b) or (c) 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
            personal information I submit with it, including my sign-off) is
            maintained indefinitely and may be redistributed consistent with
            this project or the open source license(s) involved.

then you just add a line saying

	Signed-off-by: Random J Developer <random@developer.example.org>

using your legal name (sorry, no pseudonyms or anonymous contributions.)

ARTIQ files that do not contain a license header are copyrighted by M-Labs Limited
and are licensed under GNU GPL version 3.