We spent quite some effort to keep the extended history of the long
running branch, so it would be a pity to lose all that.

As a compromise, I created another branch similar to Arnout's, which
leads to the same outcome but only has a single merge to main commit
at the end. AFAICS that will show the history as two parallel lines
quite nicely without adding the clutter of the multiple merge commits.

https://github.com/apache/incubator-pekko-http/compare/main...jrudolph:incubator-pekko-http:scala3-merged-simple?expand=1

Johannes

On Thu, Apr 27, 2023 at 1:17 PM Arnout Engelen <enge...@apache.org> wrote:
>
> On Mon, Apr 17, 2023 at 10:33 AM Matthew Benedict de Detrich
> <matthew.dedetr...@aiven.io.invalid> wrote:
> > My current objection stems from how many merge commits the PR has (see
> > https://github.com/apache/incubator-pekko-http/pull/130), I haven't done a
> > merge in Github UI for a while but if these remain in the git log after the
> > merge commit (which I believe is the case)
>
> I also believe that is the case.
>
> > then it would add a huge amount of noise to the git log.
> >
> > Also in case people are not aware, as long as a git commit references a PR
> > from Github, Github will store the branch/commits from the PR indefinitely
> > so you can always view the original PR to see precise commits/attribution.
> > This was also pointed out earlier when we were deciding on linear history
>
> Personally I'm not too worried about 'noise' in the git log, and think
> it can be helpful to have it while diagnosing issues using tools other
> than the GitHub web UI. That said, if it helps moving this feature
> forward I'm OK with having it squashed as well :).
>
> As for the general question of merging before 1.0.x: I'd say the
> trade-off is between:
> * merge now: risks incompatibility between akka-http and pekko-http
> 1.0.x, risks additional maintenance work to support Scala 2.12 and 3
> side-by-side
> * postpone merge: risks discovering problems with supporting 2.x and 3
> side-by-side later (post-1.0.x)
>
> I think it would be attractive to merge it now, to find any problems
> as early as possible (preferably before even releasing 1.0.x)
>
>
> Kind regards,
>
> Arnout
>
> > On Sun, Apr 16, 2023 at 2:00 PM PJ Fanning <fannin...@gmail.com> wrote:
> >
> > > I think it is fair to treat this as an exception and do allow a merge
> > > commit for this.
> > >
> > > On Sun, 16 Apr 2023 at 12:58, Matthew Benedict de Detrich
> > > <matthew.dedetr...@aiven.io.invalid> wrote:
> > > >
> > > > My preference is for a squash commit with the Co-Authored-Tag (which as
> > > > stated before would be automatic) but that's because personally I value
> > > > linear history much more strongly. In addition to the Co-Authored tag,
> > > more
> > > > accurate/clear attribution can also be done within the
> > > > squash commit message (i.e. main/original implementation done by X, 
> > > > fixes
> > > > to work with newest version done by Y etc etc).
> > > >
> > > > On Sun, Apr 16, 2023 at 12:53 PM Johannes Rudolph <
> > > > johannes.rudo...@gmail.com> wrote:
> > > >
> > > > > Yep, we will have to change this before this commit to be able to
> > > merge.
> > > > >
> > > > > Matthew Benedict de Detrich <matthew.dedetr...@aiven.io.invalid>
> > > schrieb
> > > > > am
> > > > > So., 16. Apr. 2023, 12:42:
> > > > >
> > > > > > > We should do a real merge commit here and not do any rebasing or
> > > > > > squashing in this case to preserve the history and attribution as it
> > > > > > is.
> > > > > >
> > > > > > I don't think this is possible because we have enforced linear
> > > history
> > > > > for
> > > > > > all Pekko repos but squash/rebase does preserve attribution via the
> > > > > > Co-Authored tag (see
> > > > > >
> > > > > >
> > > > >
> > > https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/creating-a-commit-with-multiple-authors
> > > > > > ).
> > > > > > By default if you do a squash/rebase on Github's web UI it will
> > > > > > automatically add in the Co-Authored tags if it sees that there are
> > > > > > multiple commits from different authors.
> > > > > >
> > > > > > The main downside here is the loss of granularity particularly when
> > > > > doing a
> > > > > > squash (i.e. you specifically lose which commits were done by whom).
> > > > > >
> > > > > > On Sun, Apr 16, 2023 at 12:18 PM Johannes Rudolph <
> > > > > > johannes.rudo...@gmail.com> wrote:
> > > > > >
> > > > > > > I support merging now/soon for pekko 1.0.x. It introduces some
> > > extra
> > > > > > > maintenance burden especially to support 2.12 and 3 at the same
> > > time.
> > > > > > > On the other hand, the most risky parts that the branch introduces
> > > for
> > > > > > > Scala 2.x support have already been merged with the move to the
> > > latest
> > > > > > > upstream parboiled2 version. Maintaining the branch longer will
> > > only
> > > > > > > become more difficult. I will hopefully have another look at the
> > > state
> > > > > > > of the branch next week, but I think it should be in good shape. 
> > > > > > > We
> > > > > > > should do a real merge commit here and not do any rebasing or
> > > > > > > squashing in this case to preserve the history and attribution as
> > > it
> > > > > > > is.
> > > > > > >
> > > > > > > Johannes
> > > > > > >
> > > > > > > On Sat, Apr 15, 2023 at 11:17 AM Matthew Benedict de Detrich
> > > > > > > <matthew.dedetr...@aiven.io.invalid> wrote:
> > > > > > > >
> > > > > > > > So regarding this proposal specifically of merging the scala3
> > > branch
> > > > > > into
> > > > > > > > pekko-http main I am all for it. The risk is low and if there
> > > are any
> > > > > > > > potential issues its better we find them out now rather than
> > > later
> > > > > > > > considering its for a 1.0.x release. There are also performance
> > > fixes
> > > > > > > which
> > > > > > > > we should reintroduce which have been removed when we moved to
> > > > > upstream
> > > > > > > > Parboiled2
> > > > > > > >
> > > > > > > > > Granted you likely don't care all that much about what one
> > > consumer
> > > > > > > > thinks,
> > > > > > > > but i wouldn't be surprised if others are in similar situations.
> > > > > > > >
> > > > > > > > > We're in a similar situation to Dave here. Do you have an
> > > > > indication
> > > > > > > for
> > > > > > > > how long is left on the scala3 pekko-http support?
> > > > > > > >
> > > > > > > > I wouldn't be so rash, we actually care a lot about the users
> > > (or at
> > > > > > > least
> > > > > > > > I do). The biggest problem we are experiencing is there is a lot
> > > of
> > > > > > > factors
> > > > > > > > at play which are causing tensions. For example the original
> > > plan was
> > > > > > to
> > > > > > > > make Pekko 1.0.0 as close as possible to Akka 2.6 BSL with no
> > > > > > behavioural
> > > > > > > > changes but when then realized there were changes which would be
> > > for
> > > > > > the
> > > > > > > > better of the community. One example of such change is updating
> > > > > Jackson
> > > > > > > > (due to CVE's) which also forced us to upgrade from Scala 3.2.
> > > > > > > >
> > > > > > > > Then there are other factors at play such as Scala 3.3, there 
> > > > > > > > are
> > > > > > > extremely
> > > > > > > > strong arguments by many people (including Scala center/EPFL)
> > > that
> > > > > > Pekko
> > > > > > > > should target Scala 3.3 since its a LTS. The core of the bind
> > > here
> > > > > > really
> > > > > > > > is binary compatibility/stability. If we release Pekko 1.0.0
> > > with a
> > > > > > > Scala 3
> > > > > > > > version, we are likely going to be stuck with that version for a
> > > > > LOOONG
> > > > > > > > time considering that we made an agreement that only
> > > CVE's/critical
> > > > > > fixes
> > > > > > > > will be backported to 1.0.x branch. My personal overview of the
> > > > > > situation
> > > > > > > > is that at least technically speaking (i.e. aside from the
> > > > > > > > license/header/legal issues) there isn't much to do. There is a
> > > > > project
> > > > > > > > with a brief overview of what needs to be done at
> > > > > > > > https://github.com/orgs/apache/projects/220/views/1 so I would
> > > say
> > > > > as
> > > > > > a
> > > > > > > > very broad estimation there is probably 1-2 months of work which
> > > > > should
> > > > > > > > also line up well with a Scala 3.3 LTS release (that is expected
> > > this
> > > > > > > > month). There is also
> > > > > > https://github.com/apache/incubator-pekko/pull/281
> > > > > > > > which we should make a discussion on, I will create a discussion
> > > > > thread
> > > > > > > for
> > > > > > > > this.
> > > > > > > >
> > > > > > > > On a tangential note, a discussion should probably be made about
> > > the
> > > > > > > > evolution of the Pekko project in general wrt binary
> > > > > > > > compatibility/stability. At the heart of these problems is the
> > > > > > > expectation
> > > > > > > > of extreme binary compatibility that is inherited from Akka and 
> > > > > > > > I
> > > > > think
> > > > > > > > there is merit in exploring whether such expectations is the
> > > > > healthiest
> > > > > > > for
> > > > > > > > the project in general (i.e. should they be loosened a bit?).
> > > > > > > >
> > > > > > > > On Sat, Apr 15, 2023 at 1:33 AM Greg Methvin <gr...@apache.org>
> > > > > wrote:
> > > > > > > >
> > > > > > > > > I support this proposal. Scala 3 support is something most
> > > people
> > > > > > want
> > > > > > > in a
> > > > > > > > > Scala library these days, so having it would make the 1.0.0
> > > release
> > > > > > > feel
> > > > > > > > > more complete, especially for new users. It would also allow
> > > > > library
> > > > > > > > > authors to publish new releases using the Scala 3 artifacts as
> > > soon
> > > > > > as
> > > > > > > > > possible.
> > > > > > > > >
> > > > > > > > > The only real concern is how much it would delay the release.
> > > If it
> > > > > > did
> > > > > > > > > cause a delay, I imagine we could put out a milestone release
> > > with
> > > > > > > > > everything except the Scala 3 support, to give people a chance
> > > to
> > > > > > start
> > > > > > > > > migrating earlier?
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > On Fri, Apr 14, 2023 at 8:37 AM PJ Fanning <
> > > fannin...@gmail.com>
> > > > > > > wrote:
> > > > > > > > >
> > > > > > > > > > incubator-pekko release is not dependent on anything in
> > > > > > > > > > incubator-pekko-http. The original discussion has nothing to
> > > do
> > > > > > with
> > > > > > > core
> > > > > > > > > > pekko. incubator-pekko will be released when they are ready.
> > > > > > > > > > incubator-pekko-http will be released separately, some time
> > > later
> > > > > > > when it
> > > > > > > > > > is ready. If you want to discuss incubator-pekko, please
> > > start a
> > > > > > new
> > > > > > > mail
> > > > > > > > > > thread.
> > > > > > > > > >
> > > > > > > > > > On Fri 14 Apr 2023, 17:27 Sam Byng,
> > > > > <samb...@microsoft.com.invalid
> > > > > > >
> > > > > > > > > wrote:
> > > > > > > > > >
> > > > > > > > > > > We're in a similar situation to Dave here. Do you have an
> > > > > > > indication
> > > > > > > > > for
> > > > > > > > > > > how long is left on the scala3 pekko-http support?
> > > > > > > > > > >
> > > > > > > > > > > The positives on our side are that we don't have to wait
> > > for
> > > > > > pekko
> > > > > > > > > 1.1.0
> > > > > > > > > > > to get pekko-http, and it makes further releases of
> > > connectors
> > > > > > etc
> > > > > > > > > > simpler.
> > > > > > > > > > > However, negatives would be the possible extension of 
> > > > > > > > > > > 1.0.0
> > > > > date.
> > > > > > > So
> > > > > > > > > far,
> > > > > > > > > > > looking at the MR it seems that adding pekko-http scala3
> > > > > support
> > > > > > > is not
> > > > > > > > > > far
> > > > > > > > > > > off so wouldn't extend the 1.0.0 release too dramatically.
> > > > > > > > > > >
> > > > > > > > > > > -Sam
> > > > > > > > > > >
> > > > > > > > > > > > -----Original Message-----
> > > > > > > > > > > > From: Dave Brosius <mebigfat...@gmail.com>
> > > > > > > > > > > > Sent: Friday, April 14, 2023 2:49 PM
> > > > > > > > > > > > To: dev@pekko.apache.org
> > > > > > > > > > > > Subject: Re: [DISCUSS] adding pekko-http scala3 support
> > > now
> > > > > for
> > > > > > > > > v1.0.0
> > > > > > > > > > > release
> > > > > > > > > > > >
> > > > > > > > > > > > As a future simple consumer of Apache Pekko, i'd would
> > > love
> > > > > > > anything
> > > > > > > > > > > that gets a published release sooner than later as our
> > > > > corporate
> > > > > > > > > > governance
> > > > > > > > > > > is on our necks about using akka (even the > last o/s
> > > variant)
> > > > > > > because
> > > > > > > > > of
> > > > > > > > > > > the license change. We  have 1 year from the announcement
> > > (sept
> > > > > > > 23) to
> > > > > > > > > > > resolve.
> > > > > > > > > > > >
> > > > > > > > > > > > Granted you likely don't care all that much about what
> > > one
> > > > > > > consumer
> > > > > > > > > > > thinks, but i wouldn't be surprised if others are in
> > > similar
> > > > > > > > > situations.
> > > > > > > > > > > >
> > > > > > > > > > > > On Wed, Apr 12, 2023 at 5:54 AM Nicolas Vollmar <
> > > > > > > nvoll...@gmail.com>
> > > > > > > > > > > wrote:
> > > > > > > > > > > >
> > > > > > > > > > > > I assume overall there weren't any (major) changes to
> > > public
> > > > > > > APIs for
> > > > > > > > > > > > Scala 3, so merging it for 1.0.0 would be a small risk,
> > > but
> > > > > > also
> > > > > > > > > > > > reduce burden of maintaining the branch and allow to 
> > > > > > > > > > > > ship
> > > > > > Scala 3
> > > > > > > > > > > > support across the board with 1.0.0. I'd +1 that.
> > > > > > > > > > > >
> > > > > > > > > > > > On Tue, 11 Apr 2023 at 13:26, PJ Fanning <
> > > > > fannin...@apache.org
> > > > > > >
> > > > > > > > > wrote:
> > > > > > > > > > > >
> > > > > > > > > > > > > Hi,
> > > > > > > > > > > > >
> > > > > > > > > > > > > I'd like to pitch the idea of just merging the
> > > pekko-http
> > > > > > > scala3
> > > > > > > > > > > > > support to main branch when it is ready and including
> > > this
> > > > > in
> > > > > > > the
> > > > > > > > > > > v1.0.0 release.
> > > > > > > > > > > > > We have already made small-ish changes like using
> > > Parboiled
> > > > > > > jar and
> > > > > > > > > > > > > upgrading Jackson.
> > > > > > > > > > > > >
> > > > > > > > > > > > > The scala3 changes don't make significant changes to
> > > the
> > > > > APIs
> > > > > > > and
> > > > > > > > > it
> > > > > > > > > > > > feels
> > > > > > > > > > > > > like adding the scala3 support now would not make
> > > migration
> > > > > > > from
> > > > > > > > > > > > > Akka
> > > > > > > > > > > > HTTP
> > > > > > > > > > > > > much harder. Akka HTTP has released scala3 support 
> > > > > > > > > > > > > (BSL
> > > > > > > licensed)
> > > > > > > > > > > > > but the release seems to have gone smoothly - without
> > > much
> > > > > > user
> > > > > > > > > > > complaint.
> > > > > > > > > > > > Nothing
> > > > > > > > > > > > > significant had to be documented about the migration 
> > > > > > > > > > > > > to
> > > > > Akka
> > > > > > > HTTP
> > > > > > > > > > > > > 10.4
> > > > > > > > > > > > [1].
> > > > > > > > > > > > >
> > > > > > > > > > > > > My main reason for supporting an early merge of this 
> > > > > > > > > > > > > is
> > > > > that
> > > > > > it
> > > > > > > > > will
> > > > > > > > > > > > > save us a whole circle of releases downstream. A 
> > > > > > > > > > > > > scala3
> > > > > > support
> > > > > > > > > > > > > pekko-http
> > > > > > > > > > > > > v1.1.0 would lead to new releases for pekko-connectors
> > > and
> > > > > > > other
> > > > > > > > > > > > downstream
> > > > > > > > > > > > > projects.
> > > > > > > > > > > > >
> > > > > > > > > > > > > I get that we want to make migration to v1.0.0 easy
> > > but I
> > > > > > don't
> > > > > > > > > > > > > think the
> > > > > > > > > > > > > scala3 changes make this significantly harder.
> > > > > > > > > > > > >
> > > > > > > > > > > > > If we had made faster progress with the v1.0.0 release
> > > then
> > > > > > > being
> > > > > > > > > > > > > conservative probably makes sense but now that we 
> > > > > > > > > > > > > still
> > > > > don't
> > > > > > > have
> > > > > > > > > a
> > > > > > > > > > > > > release scheduled, it feels like we might be better 
> > > > > > > > > > > > > off
> > > > > > > planning to
> > > > > > > > > > > > > get a slightly bigger v1.0.0 release done and saving
> > > > > > ourselves
> > > > > > > the
> > > > > > > > > > > > > hassle of having to do a v1.1.0 release for the scala3
> > > > > > changes.
> > > > > > > > > > > > >
> > > > > > > > > > > > > [1]
> > > > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > >
> > > > > >
> > > https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoc.
> > > > > > > > > > > > akka.io
> > > > > > > > > %2Fdocs%2Fakka-http%2Fcurrent%2Fmigration-guide%2Fmigration-gui
> > > > > > > > > > > > de-10.4.x.html%23general-notes&data=05%7C01%7Csambyng%
> > > > > > > > > 40microsoft.com%
> > > > > > > > > > > >
> > > > > > > > >
> > > > > >
> > > 7C84d3391cb35f40598c2908db3ceefd85%7C72f988bf86f141af91ab2d7cd011db47%
> > > > > > > > > > > >
> > > > > > > > >
> > > > > >
> > > 7C1%7C0%7C638170769415330544%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM
> > > > > > > > > > > >
> > > > > > > > >
> > > > > >
> > > DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdat
> > > > > > > > > > > >
> > > > > > > a=9kKrhjPaZVGmWaV%2FPcF%2BygzMZjd%2BzXwNpCIuQxyD%2FcY%3D&reserved=0
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > >
> > > > > --------------------------------------------------------------------
> > > > > > > > > > > > > - To unsubscribe, e-mail:
> > > dev-unsubscr...@pekko.apache.org
> > > > > > For
> > > > > > > > > > > > > additional commands, e-mail: dev-h...@pekko.apache.org
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > >
> > > ---------------------------------------------------------------------
> > > > > > > > > > > To unsubscribe, e-mail: dev-unsubscr...@pekko.apache.org
> > > > > > > > > > > For additional commands, e-mail: dev-h...@pekko.apache.org
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > --
> > > > > > > >
> > > > > > > > Matthew de Detrich
> > > > > > > >
> > > > > > > > *Aiven Deutschland GmbH*
> > > > > > > >
> > > > > > > > Immanuelkirchstraße 26, 10405 Berlin
> > > > > > > >
> > > > > > > > Amtsgericht Charlottenburg, HRB 209739 B
> > > > > > > >
> > > > > > > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen
> > > > > > > >
> > > > > > > > *m:* +491603708037
> > > > > > > >
> > > > > > > > *w:* aiven.io *e:* matthew.dedetr...@aiven.io
> > > > > > >
> > > > > > >
> > > ---------------------------------------------------------------------
> > > > > > > To unsubscribe, e-mail: dev-unsubscr...@pekko.apache.org
> > > > > > > For additional commands, e-mail: dev-h...@pekko.apache.org
> > > > > > >
> > > > > > >
> > > > > >
> > > > > > --
> > > > > >
> > > > > > Matthew de Detrich
> > > > > >
> > > > > > *Aiven Deutschland GmbH*
> > > > > >
> > > > > > Immanuelkirchstraße 26, 10405 Berlin
> > > > > >
> > > > > > Amtsgericht Charlottenburg, HRB 209739 B
> > > > > >
> > > > > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen
> > > > > >
> > > > > > *m:* +491603708037
> > > > > >
> > > > > > *w:* aiven.io *e:* matthew.dedetr...@aiven.io
> > > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > >
> > > > Matthew de Detrich
> > > >
> > > > *Aiven Deutschland GmbH*
> > > >
> > > > Immanuelkirchstraße 26, 10405 Berlin
> > > >
> > > > Amtsgericht Charlottenburg, HRB 209739 B
> > > >
> > > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen
> > > >
> > > > *m:* +491603708037
> > > >
> > > > *w:* aiven.io *e:* matthew.dedetr...@aiven.io
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: dev-unsubscr...@pekko.apache.org
> > > For additional commands, e-mail: dev-h...@pekko.apache.org
> > >
> > >
> >
> > --
> >
> > Matthew de Detrich
> >
> > *Aiven Deutschland GmbH*
> >
> > Immanuelkirchstraße 26, 10405 Berlin
> >
> > Amtsgericht Charlottenburg, HRB 209739 B
> >
> > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen
> >
> > *m:* +491603708037
> >
> > *w:* aiven.io *e:* matthew.dedetr...@aiven.io
>
>
>
> --
> Arnout Engelen
> ASF Security Response
> Committer on Apache Pekko
> Committer on NixOS
> Independent Open Source consultant
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscr...@pekko.apache.org
> For additional commands, e-mail: dev-h...@pekko.apache.org
>

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