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Patch submission guidelines [1]

We strongly prefer to receive contributions as Github Pull Requests (PR), and that is what's described below.

If for some reason that is inconvenient, you can generate a patch [2] and send it attached to the mailing list.

Just in case, a good guide to git <>.


Make sure there is an open issue for your change.

Perhaps, if it's a new feature, you probably want to discuss it first

Have a local clone with upload rights to work with.

  • if you have commit rights in los-cocos/cocos, have a clone of that project
  • if you don't, fork the project ( the button 'fork' in ) and then clone your-username/cocos project

Create a new Git branch specific to your change(s).

For example, if you're adding a new feature to foo the bars, do something like the following:

$ git checkout master
$ git pull
$ git checkout -b foo-the-bars
<hack hack hack>
$ git push origin HEAD

This makes life much easier for maintainers if you have (or ever plan to have) additional changes in your own master branch.

Submit pull request based on your new 'foo-the-bars' branch.

  • Go to the Github page associated with your clone; if you forked it is the page for your-username/cocos project
  • In the button-dropdown list branch: zzz select branch foo-the-bar
  • Press the green button to the left (the tooltip shows preview, create a pull request)
  • Fill the subject and body. Make the subject descriptive and add a reference to the issue you are working, by example if the issue number was 123 the subject can be 'foo the bars , #123'

A corollary:

Please don't put multiple fixes/features in the same branch/pull request! In other words, if you're hacking on new feature X and find a bugfix that doesn't require new feature X, make a new distinct branch and PR for the bugfix.


  • You may want to use the Tim Pope’s Git commit messages standard. It’s not necessary, but if you are doing something big, we recommend describing it in the commit message.
  • While working, rebase instead of merging (if possible). We encourage using git rebase instead of git merge. If you are using git pull, please run git config pull.rebase true to prevent merges from happening and replace them with rebase goodness. There is also an “emergency switch” in case rebases fail and you do not know what to do: git pull --no-rebase.
  • Make sure documentation is updated — at the very least, keep docstrings current, and if necessary, update the reStructuredText documentation in docgen/.
  • Add a changelog entry at the top of CHANGELOG mentioning issue number and in the correct 'New Features'/'Bugfixes' section.
  • Be PEP8 compliant in new code
  • Try writing some tests if possible — again, following existing tests is often easiest, and a good way to tell whether the feature you are modifying is easily testable.
  • Make sure to mention the issue it affects in the description of your pull request, so it's clear what to test and how to do it.
[1]Very inspired by `Nikola's`_ thanks!
[2]A good article on generating patches: