Re: Fedora 33 System-Wide Change proposal: ELN Buildroot and Compose

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On Fri, Mar 27, 2020 at 2:09 PM David Cantrell <dcantrell@xxxxxxxxxx> wrote:
>
> On Fri, Mar 27, 2020 at 01:48:15PM -0500, Justin Forbes wrote:
> >On Fri, Mar 27, 2020 at 10:47 AM David Cantrell <dcantrell@xxxxxxxxxx> wrote:
> >>
> >> On Tue, Mar 24, 2020 at 10:32:26AM +0100, Aleksandra Fedorova wrote:
> >> >As Ben is on PTO, I'd like to present the System-Wide Change
> >> >
> >> >https://fedoraproject.org/wiki/Changes/ELN_Buildroot_and_Compose
> >> [snip]
> >>
> >> It has taken me some time, but I have read through the entire thread in
> >> addition to the change proposal.  The idea sounds really interesting to me and
> >> a lot of points have come up on the thread.  I decided to group my responses
> >> together as this single email after reading through the entire thread to make
> >> it a bit easier to read (and to write).
> >>
> >> TL;DR -- I think this proposal should be broken up in to 2 proposals
> >>
> >> The turning point for me in the change proposal was the discussion of the RPM
> >> spec file macros and getting in to the mechanics of how ELN will work.  It
> >> looks like a lot of other people had the same reaction because many of the
> >> responses get in to the technical details and for some questions, there are no
> >> answers yet.  After thinking about it for a while, it would make sense to me
> >> to have ELN come up in multiple phases/proposals.
> >>
> >> Suggested Proposals:
> >>
> >> 1) ELN buildroot and install media
> >>
> >>     In this proposal, I'd like to see the ELN buildroot defined, the Koji
> >>     changes implemented, the automated builds implemented, and install media
> >>     composes happening.
> >>
> >>     The expectation here should be that it is rough around the edges.  But
> >>     doing this gives the community something to see, use, and discuss further
> >>     when reviewing the next change proposals.
> >>
> >>     We should have some community goals with this proposal to capture a list of
> >>     EL vs. Fedora differences and how to address those per package and in the
> >>     context of ELN.
> >>
> >> 2) ELN lifecycle
> >>
> >>     This gets in to more of the mechanics of how ELN builds can be handled by
> >>     the community.  I do not think there is a one size fits all and we should
> >>     give developers control over how best to handle this for the packages they
> >>     maintain.
> >>
> >>     The spec file macros, git branch ideas, inheritance, pull request workflow,
> >>     what builds block what composes, who is responsible for ELN failures, and
> >>     other expectations of package maintainers (both Fedora and RHEL) should be
> >>     discussed here.  This proposal is definitely the policy side of things, but
> >>     I think it would be easier to talk about after #1 is done.
> >>
> >> Having seen multiple efforts to do a "RHEL rawhide" in a way (one even called
> >> rhel-rawhide at one point), the ELN idea is one where the work is being
> >> targeted in the right place.  As a Fedora contributor, I see RHEL as a
> >> customer and if we can make their work easier, I want to do that.  As a RHEL
> >> package maintainer, I see Fedora as a place where I can make my job easier as
> >> a RHEL package maintainer.  The more things we get right on the community side
> >> of things, the easier it is to produce RHEL.
> >>
> >> Various comments from reading the thread:
> >>
> >> * I'm not crazy about the %{?rhel} macro name.  I would prefer we use 'el'
> >>    instead to cover RHEL and CentOS and EPEL.  Or at least have a 'el' macro
> >>    that covers all three of those.
> >>
> >
> >The %{?rhel} macro name currently exists and is in use in some
> >packages as I recall.
>
> Sorry, what I meant was I'm not crazy about the %{?rhel} macro for this work.
> I would prefer a new macro for the ELN work to distinguish it from the
> existing macros.
>
> >> * I prefer the '.eln' dist tag carry a number indicating N+1 from the RHEL
> >>    major release.  This should be ok in the community since Red Hat ultimately
> >>    makes the decision to version RHEL.  This is an engineering decision and I
> >>    think it would help imply that ELN is _not_ meant for current RHEL.  This
> >>    also lets us entertain the idea of multiple ELN major versions concurrently
> >>    should we ever want to do that.
> >>
> >
> >I rather equate this to RHELhide, it should be evolving.  Once N is
> >branched (CentOS?) and moving on, this is N+1.  This is the rolling
> >development location.
>
> I agree.  The 'N' value seen in this dist tag should always be greater than
> the latest major version we see for RHEL and CentOS.

Sorry, I wasn't clear. I mean that the rhelhide/evolving nature of
this seems it should carry no number, similar to the rawhide it is
inheriting from. Let them deal with numbers in CentOS and RHEL.

Justin
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