[Engineering] [Ops] Change to version number incrementing for weekly Wikimedia MediaWiki deploys

Tue Jul 11 20:31:09 UTC 2017

Maybe we could prevent breaking things by always creating a branch for
every wmf.XX number. That is, always create a new branch, even on weeks
with no official branch cut. So in the case of wmf.8, we would simply
branch off from wmf.7, thus extending wmf.7 for another week but under a
new name, instead of creating a new branch from master.

On Tue, Jul 11, 2017 at 3:20 PM, Greg Grossmeier <greg at wikimedia.org> wrote:

> Hello all,
>
> I failed to send this notice out before when the change was made; mea
> culpa.
>
> Background:
> * We start a new 1.XX-wmf.XX series after each MW 'tarball' release. For
>   example right now we're in the 1.30-wmf.XX series now that 1.29 is
>   nearing release.
>
> The change:
> * Instead of only incrementing the wmf.XX portion when a new branch is
>   actually deployed to Wikimedia production servers, we will increment
>   that number each week regardless.
> ** For example, last week we did not push a new branch out to production
>    due to the short work week. That week would have been 1.30-wmf.8. We
>    thus skipped wmf.8 and are now on wmf.9 this week.
>
> Why?
> We hope to make the creation of the weekly deployment branch
> (1.XX-wmf.XX) automatic in the near future. This will allow us to put
> that on a cron and not worry about special cases (another special case
> being when we hold back the train due to a bad regression). This (every
> week gets a wmf.XX number) should simplify logic in many places.
>
> Thanks!
>
> Greg on behalf of the Release Engineering team
>
>
> PS: Yeah, we could have just gone with ISO week numbers, but we didn't
> want to change too much in the version string to reduce the chance of
> breaking too many other tools.
> PPS: And yes, my failure to pre-announce this instead of post-announce
> caused at least the ReleaseTaggerBot to break this week. Mea cupla.
>
> --
> | Greg Grossmeier            GPG: B2FA 27B1 F7EB D327 6B8E |
> | Release Team Manager            A18D 1138 8E47 FAC8 1C7D |
>
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>
>
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