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88 lines
4.2 KiB
Markdown
88 lines
4.2 KiB
Markdown
# On Collaborative Development
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Kubernetes is open source, but many of the people working on it do so as their
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day job. In order to avoid forcing people to be "at work" effectively 24/7, we
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want to establish some semi-formal protocols around development. Hopefully these
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rules make things go more smoothly. If you find that this is not the case,
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please complain loudly.
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## Patches welcome
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First and foremost: as a potential contributor, your changes and ideas are
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welcome at any hour of the day or night, weekdays, weekends, and holidays.
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Please do not ever hesitate to ask a question or send a PR.
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## Code reviews
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All changes must be code reviewed. For non-maintainers this is obvious, since
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you can't commit anyway. But even for maintainers, we want all changes to get at
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least one review, preferably (for non-trivial changes obligatorily) from someone
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who knows the areas the change touches. For non-trivial changes we may want two
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reviewers. The primary reviewer will make this decision and nominate a second
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reviewer, if needed. Except for trivial changes, PRs should not be committed
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until relevant parties (e.g. owners of the subsystem affected by the PR) have
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had a reasonable chance to look at PR in their local business hours.
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Most PRs will find reviewers organically. If a maintainer intends to be the
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primary reviewer of a PR they should set themselves as the assignee on GitHub
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and say so in a reply to the PR. Only the primary reviewer of a change should
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actually do the merge, except in rare cases (e.g. they are unavailable in a
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reasonable timeframe).
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If a PR has gone 2 work days without an owner emerging, please poke the PR
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thread and ask for a reviewer to be assigned.
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Except for rare cases, such as trivial changes (e.g. typos, comments) or
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emergencies (e.g. broken builds), maintainers should not merge their own
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changes.
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Expect reviewers to request that you avoid [common go style
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mistakes](https://github.com/golang/go/wiki/CodeReviewComments) in your PRs.
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## Assigned reviews
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Maintainers can assign reviews to other maintainers, when appropriate. The
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assignee becomes the shepherd for that PR and is responsible for merging the PR
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once they are satisfied with it or else closing it. The assignee might request
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reviews from non-maintainers.
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## Merge hours
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Maintainers will do merges of appropriately reviewed-and-approved changes during
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their local "business hours" (typically 7:00 am Monday to 5:00 pm (17:00h)
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Friday). PRs that arrive over the weekend or on holidays will only be merged if
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there is a very good reason for it and if the code review requirements have been
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met. Concretely this means that nobody should merge changes immediately before
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going to bed for the night.
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There may be discussion an even approvals granted outside of the above hours,
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but merges will generally be deferred.
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If a PR is considered complex or controversial, the merge of that PR should be
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delayed to give all interested parties in all timezones the opportunity to
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provide feedback. Concretely, this means that such PRs should be held for 24
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hours before merging. Of course "complex" and "controversial" are left to the
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judgment of the people involved, but we trust that part of being a committer is
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the judgment required to evaluate such things honestly, and not be motivated by
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your desire (or your cube-mate's desire) to get their code merged. Also see
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"Holds" below, any reviewer can issue a "hold" to indicate that the PR is in
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fact complicated or complex and deserves further review.
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PRs that are incorrectly judged to be merge-able, may be reverted and subject to
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re-review, if subsequent reviewers believe that they in fact are controversial
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or complex.
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## Holds
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Any maintainer or core contributor who wants to review a PR but does not have
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time immediately may put a hold on a PR simply by saying so on the PR discussion
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and offering an ETA measured in single-digit days at most. Any PR that has a
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hold shall not be merged until the person who requested the hold acks the
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review, withdraws their hold, or is overruled by a preponderance of maintainers.
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