# Contributing to Project X-Ray
There are a couple of guidelines when contributing to Project X-Ray which are listed here.
All contributions should be sent as [GitHub Pull requests](https://help.github.com/articles/creating-a-pull-request-from-a-fork/).
All software (code, associated documentation, support files, etc) in the Project X-Ray repository are licensed under the very permissive [ISC Licence](https://opensource.org/licenses/ISC). A copy can be found in the [LICENSE](LICENSE) file.
All new contributions must also be released under this license.
### Code of Conduct
By contributing you agree to the [code of conduct](CODE_OF_CONDUCT.md). We follow the open source best practice of using the [Contributor Covenant](https://www.contributor-covenant.org/) for our Code of Conduct.
### Sign your work
To improve tracking of who did what, we follow the Linux Kernel’s [“sign your work” system](https://github.com/wking/signed-off-by). This is also called a [“DCO” or “Developer’s Certificate of Origin”](https://developercertificate.org/).
All commits are required to include this sign off and we use the [Probot DCO App](https://github.com/probot/dco) to check pull requests for this.
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 a open-source patch. The rules are pretty simple: if you can certify the below:
Developer’s Certificate of Origin 1.1
By making a contribution to this project, I certify that:
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
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
The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.
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 <email@example.com>
using your real name (sorry, no pseudonyms or anonymous contributions.)
You can add the signoff as part of your commit statement. For example:
git commit –signoff -a -m “Fixed some errors.”
Hint: If you’ve forgotten to add a signoff to one or more commits, you can use the following command to add signoffs to all commits between you and the upstream master:
git rebase –signoff upstream/master
### Contributing to the docs
In addition to the above contribution guidelines, see the guide to [updating the Project X-Ray docs](UPDATING-THE-DOCS.md).
This file is generated from [README.md](README.md), please edit that file then run the ./.github/update-contributing.py.