[swift-lldb-dev] Proposal for Swift and Ubuntu releases

[Ryan Lovelett]

On Thu, Apr 21, 2016, at 01:12 PM, Todd Fiala via swift-lldb-dev wrote:
> Hi all,
> I wanted to propose how we can go about handling newer Ubuntu releases
> in a systematic way.  This covers how we handle Ubuntu on our CI, but
> also reflects where we'll be focusing effort at any given point.  The
> primary intent is to support the most recent Ubuntu Long Term Service
> release and the absolute latest Ubuntu release, with a bit of overlap
> when phasing out the LTS release that is going out of scope.
> Since the next release, fast moving or not, is the next Long Term
> Stability release, Ubuntu 16.04 LTS (available now), I propose we:
> * swap out our 15.10 fast moving release with Ubuntu 16.04 LTS.
> * allow 16.04 and 14.04 to co-exist to give our stability-minded
>   community time to switch over to 16.04.
> When 16.10 comes out in October 2016, we drop 14.04 and move 16.10
> onto those builders.
> This continues to have us testing against the latest release, which
> will be Ubuntu 16.04 LTS when we switch, gives us the latest stable
> coverage (also 16.04), and gives our community a little more time with
> active coverage on 14.04, the previous long term support version.
> We’ll then get back to the normal program in October 2016 when we pick
> up the latest fast-moving release, with coverage on Ubuntu 16.10 and
> Ubuntu 16.04 LTS.
> This assumes we want to keep our eyes on no more than two Ubuntu
> releases at a time, which matches current CI infrastructure planning.
> Looking forward over the next two years, this is the schedule I’m
> proposing:
>


>  * April 2016:  Replace Ubuntu 15.10 with Ubuntu 16.04  (coverage:
>    Ubuntu 14.04, Ubuntu 16.04 LTS)
>  * October 2016:  Replace Ubuntu 14.04 with Ubuntu 16.10 (coverage:
>    Ubuntu 16.04 LTS, Ubuntu 16.10)
>  * April 2017:  Replace Ubuntu 16.10 with Ubuntu 17.04 (coverage:
>    Ubuntu 16.04 LTS, Ubuntu 17.04)
>  * October 2017:  Replace Ubuntu 17.04 with Ubuntu 17.10 (coverage:
>    Ubuntu 16.04 LTS, Ubuntu 17.10)
>  * April 2018:  Replace Ubuntu 17.10 with Ubuntu 18.04 LTS (coverage:
>    Ubuntu 16.04, Ubuntu 18.04 LTS)
>
> Thoughts?  Once we finalize the plan, I'll coordinate with the
> infrastructure teams and round up resources needed to get Ubuntu 16.04
> supported and on the CI.
 
This seems to mostly match up with the guidance provided by Canonical
and the community around Ubuntu. Therefore it seems reasonable to me.
 
I like it. Consider this a vote in favor.
 
> Thanks!
> Sincerely,
> Todd Fiala
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