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Cylc: How to Contribute

Thanks for you interest in the Cylc project!

Contributions are welcome, please open an issue to discuss changes before raising a pull request.

You can also get in touch via:

  • The developers chat: chat
  • The forum: forum

New Contributors

Please read the CLA.

Please add your name to the Code Contributors section of this file as part of your first Pull Request (for each Cylc repository you contribute to).

Contribute Code

We use semver to separate riskier changes (e.g. new features & code refactors) from bugfixes to provide more stable releases for production environments.

Enhancements are made on the master branch and released in the next minor version (e.g. 8.1, 8.2, 8.3)

Bugfixes and minor usability enhancements are made on bugfix branches and released as the next maintainance version (e.g. 8.0.1, 8.0.2, 8.0.3). E.G. if the issue is on the 8.0.x milestone, branch off of 8.0.x to develop your bugfix, then raise the pull request against the 8.0.x branch. We will later merge the 8.0.x branch into master.

Feel free to ask questions on the issue or developers chat if unsure about anything.

We use towncrier for generating the changelog. Changelog entries are added by running

towncrier create <PR-number>.<break|feat|fix>.md --content "Short description"

Code Contributors

The following people have contributed to this code under the terms of the Contributor Licence Agreement and Certificate of Origin detailed below (except for the parenthesised names, which represent contributions from outside of NIWA and the Met Office that predate the explicit introduction of this Agreement in July 2018; they must be un-parenthesised in future pull requests).

  • Hilary Oliver
  • Matt Shin
  • Ben Fitzpatrick
  • Andrew Clark
  • Oliver Sanders
  • Declan Valters
  • Sadie Bartholomew
  • (Luis Kornblueh)
  • Kerry Day
  • Prasanna Challuri
  • David Matthews
  • Tim Whitcomb
  • Scott Wales
  • Tomek Trzeciak
  • Thomas Coleman
  • Bruno Kinoshita
  • (Annette Osprey)
  • (Jonathan Thomas)
  • Rosalyn Hatcher
  • (Domingo Manubens Gil)
  • Jonny Williams
  • (Milton Woods)
  • (Alex Reinecke)
  • (Chandin Wilson)
  • (Kevin Pulo)
  • Lois Huggett
  • (Martin Dix)
  • (Ivor Blockley)
  • Alexander Paulsell
  • David Sutherland
  • Martin Ryan
  • Tim Pillinger
  • Samuel Gaist
  • Dima Veselov
  • Gilliano Menezes
  • Mel Hall
  • Ronnie Dutta
  • John Haiducek
  • (Andrew Huang)
  • Cheng Da
  • Mark Dawson

(All contributors are identifiable with email addresses in the git version control logs or otherwise.)

Contributor Licence Agreement and Certificate of Origin

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, either on my behalf or on behalf of my employer, under the terms and conditions as described by this file; or

(b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate licence and I have the right or permission from the copyright owner under that licence to submit that work with modifications, whether created in whole or in part by me, under the terms and conditions as described by this file; 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 my name and email address) is retained for the full term of the copyright and may be redistributed consistent with this project or the licence(s) involved.

(e) I, or my employer, grant to NIWA and all recipients of this software a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright licence to reproduce, modify, prepare derivative works of, publicly display, publicly perform, sub-licence, and distribute this contribution and such modifications and derivative works consistent with this project or the licence(s) involved or other appropriate open source licence(s) specified by the project and approved by the Open Source Initiative (OSI).

(f) If I become aware of anything that would make any of the above inaccurate, in any way, I will let NIWA know as soon as I become aware.

(The Cylc Contributor Licence Agreement and Certificate of Origin is inspired that of Rose, which in turn was inspired by the Certificate of Origin used by Enyo and the Linux Kernel.)