https://github.com/marketplace/actions/gs-commit-message-checker

On Tue, Aug 4, 2020 at 10:25 AM Robert Bradshaw <[email protected]> wrote:

> +1, thanks for the reminder.
>
> This should be really easy to automate, using
> https://developer.github.com/webhooks/event-payloads/#pull_request to
> give a warning when the change history is not sufficiently "clean."
> I'm not sure where to host this though (or if it could be integrated
> into jenkins--basically I'd just want to run a Python script with the
> PR number (or better, just point to the local git repo and have the
> master's commit handy) as another precommit).
>
> On Tue, Aug 4, 2020 at 10:10 AM Rui Wang <[email protected]> wrote:
> >
> > +1 thanks Alexey.
> >
> > My apologies that I merged such a case recently (but not intentionally).
> I tried to use the "squash and merge" button with a consolidated commit
> message. After clicking the button, github showed "failed to merge" and
> gave a retry button, and after clicking that retry button, github magically
> switched to "create merge commit" approach thus merged some fixup commits
> to the main branch.
> >
> > This is a rare case (I only encountered once). But I will pay more
> attention next time. I could ask PR authors to squash their commits before
> merging when it is possible.
> >
> >
> > -Rui
> >
> > On Tue, Aug 4, 2020 at 9:40 AM Alexey Romanenko <
> [email protected]> wrote:
> >>
> >> Yes, good point, thanks Valentyn.
> >>
> >> On 4 Aug 2020, at 18:29, Valentyn Tymofieiev <[email protected]>
> wrote:
> >>
> >> +1, thanks, Alexey.
> >>
> >> Also a reminder from the contributor guide: do not use the default
> GitHub commit message for merge commits, which looks like:
> >>
> >> Merge pull request #1234 from some_user/transient_branch_name
> >>
> >> Instead, add the commit message into the subject line, for example:
> "Merge pull request #1234: [BEAM-7873] Fix the foo bizzle bazzle".
> >>
> >> On Tue, Aug 4, 2020 at 7:13 AM Alexey Romanenko <
> [email protected]> wrote:
> >>>
> >>> Hi all,
> >>>
> >>> I’d like to attract your attention regarding our Git commit history
> and related issue. A while ago I noticed that it started getting not very
> clear and quite verbose comparing to how it was before. We have quite
> significant amount of recent commits like “fix”, “address comments”,
> “typo”, “spotless”, etc. Most of them also doesn’t contain Jira Tag as a
> prefix and actually is just supplementary commits to “main” and initial
> commit of PR, added after several PRs review rounds.
> >>>
> >>> AFAIR, we already had several discussion in the past about this topic
> and we agreed that we should avoid such commits in a final merge and have
> only one (in most cases) or several (if necessary) logical commits that
> should be atomic and properly explain what they do.
> >>>
> >>> Why these “tiny" commits are bad practice? Just several main reasons:
> >>> - They pollute our git repository history and don’t give any
> additional and useful further information;
> >>> - They are not atomic and we can’t easily revert (rollback) this
> supplementary commit since the state of the build before was likely broken
> or had incorrect behaviour. So, in this case, the whole set of PRs commits
> should be reverted which is not convenient and error-prone. It’s also
> expected that all checks were green before merging a PR (take a part flaky
> tests).
> >>> - They are not informative in terms of commit message. So it makes
> more hard to identify Git annotated code and how the lines of code are
> related together.
> >>>
> >>> Following this, I just want to briefly remind our Committers rules
> regarding PR merging [1].
> >>> Every commit:
> >>> - should do one thing and reflect it in commit message;
> >>> - should contain Jira Tag;
> >>> - all “fixup” and “address comments” type of commits should be
> squashed by author or committer before merging.
> >>>
> >>> Please, pay attention on what is finally committed and merged into our
> repository and it should help to keep our commit history clear, which will
> be transferred to saving a time of other developers in the end.
> >>>
> >>> [1]
> https://beam.apache.org/contribute/committer-guide/#finishing-touches
> >>>
> >>> Regards,
> >>> Alexey
> >>
> >>
>

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