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libvirt/docs/best-practices.rst
Michal Privoznik 42b2f1f8b8 docs: Update best practices wrt "Fixes:" and GitLab 
We document that a commit fixing an issue tracked in GitLab
should put just "Fixes: #NNN" into its commit message. But when
viewing git log, having full URL which is directly clickable is
more developer friendly and GitLab is capable of handling both.
Therefore, document that users should put full URL, just like
when fixing a bug tracked in other sites.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
2022-10-25 08:37:28 +02:00

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Best practices

These are a few guidelines to keep in mind when submitting patches to libvirt: following them will maximise the chance of your patches being reviewed in a timely manner and being accepted into libvirt with minimal back-and-forth.

  • Discuss any large changes on the mailing list first. Post patches early and listen to feedback.
  • In your commit message, make the summary line reasonably short (60 characters is typical), followed by a blank line, followed by any longer description of why your patch makes sense. If the patch fixes a regression, and you know what commit introduced the problem, mentioning that is useful. If the patch resolves an upstream bug reported in GitLab, or downstream bug, put "Resolves: $fullURL" of the bug. In both cases also summarize the issue rather than making all readers follow the link. You can use 'git shortlog -30' to get an idea of typical summary lines.
  • Split large changes into a series of smaller patches, self-contained if possible, with an explanation of each patch and an explanation of how the sequence of patches fits together. Moreover, please keep in mind that it's required to be able to compile cleanly (including ninja test) after each patch. A feature does not have to work until the end of a series, but intermediate patches must compile and not cause test-suite failures (this is to preserve the usefulness of git bisect, among other things).

There is more on this subject, including lots of links to background reading on the subject, on Richard Jones' guide to working with open source projects.