[squeak-dev] Squeak, Tonel, and the Tonel standard
David T. Lewis
lewis at mail.msen.com
Thu Aug 27 01:26:38 UTC 2020
Thanks for writing this. If there was such a thing as a standard
Tonel format that works correctly with Squeak, Cuis, GemStone,
and Pharo, then it sounds like a very worthwhile thing.
My only real interaction with Tonel involves publishing a couple
of packages that I develop in Squeak for the benefit of some Pharo
users. That was fine as far as it went, but beyond doing occasional
exports to that format, the Pharo implementation is basically useless
for me due to its inability to track method stamp information. This
seems like it should be a fixable problem, and if so it would be
very nice to see a standard format in circulation.
I am not a GemStone user, but I am a long time admirer of GS after
having encountered it in a project that I worked on at Ford Motor
Company back in the 1990s. Since then I have been active in Squeak,
and I would be very happy to see good interoperability between
Squeak and GS. If Tonel can help with that, great.
On Wed, Aug 26, 2020 at 12:20:02PM -0700, Martin McClure wrote:
> Hi all,
> Dale let me know this morning that Tonel was being discussed on
> Squeak-dev.?? I beg your pardon for arriving late.
> As Dale said, I'm the minder of the Tonel 1.0 standard, which is
> currently in draft, with initial feedback from some of the folks who
> have implemented or are interested in implementing Tonel for their
> Smalltalk dialect.
> I'm interested in getting feedback from *all* dialects who are
> interested in using Tonel. I hope that the Squeak community will
> Tonel started as a collaboration between Pharo (primarily Esteban
> Lorenzano) and GemTalk (primarily me), but the intent has always been to
> have a format that can be used in common between *all* dialects of
> Smalltalk. The fundamental shape of Tonel is probably not going to
> change at this point, but feedback so far is likely to result in some
> changes to the draft standard.
> Note that Tonel as currently implemented by Pharo is a bit different
> from standard Tonel. Pharo has agreed to make several changes to the
> format to standardize it. I'm not sure what the status of those changes
> within the Pharo project. The GemStone implementation is closer to the
> standard, though not fully there yet.
> I encourage the Squeak community to consider whether coding to the
> standard early on might be a desirable direction. As Dale explained, the
> standard does allow for dialect-specific properties, so adding
> timestamps probably doesn't require any changes to the spec.
> I'd like it If a few folks from the community would volunteer to give
> the spec a careful read-through and comment. It's a bit of a read (and
> was quite a bit of effort to write!) so I won't post the draft on the
> list, but it's available by request, and I need to figure out a place to
> make it readily available.
> On 8/26/20 9:41 AM, Dale Henrichs wrote:
> >When you repost, could you make sure that you include a description of
> >where the time stamps are stashed ... I'm assuming that you are adding
> >it to the method properties (where the category is stashed) as I think
> >that this is the right place, but it's always best not to guess:)
> >The current crop of Tonel readers/writers do not necessarily do a good
> >job of preserving, foreign data (IIRC, the convention is to add a
> >platform prefix to the property name, which is the same convention
> >used for class properties ... at GemStone we add a leading `gs_` to
> >our property names), so until we can get all of the different Tonel
> >readers/writers to preserve foreign properties (package, class and
> >method) it will continue to be dicey business for preserving foreign
> >properties in cross platform projects ...
> >Monticello does not explicitly preserve foreign properties as the
> >definitions get created from the native objects, so it takes some
> >additional work to arrange to preserve foreign properties for
> >packages, classes, and methods in the objects themselves. So it is
> >worth considering what you will do with preserving foreign properties
> >from other platforms.
> >FWIW, I intend to support the preservation of foreign properties in
> >Rowan (read that as "I haven't done that yet":)
> >Finally, Martin McClure has started working on a spec for the next
> >generation Tonel format ... to add a few missing pieces and tweak the
> >format to make it possible to continue to evolve the Tonel format into
> >the future in a somewhat sane way. If there are folks here in the
> >Squeak community who would like to review, comment and participate in
> >the creation of the next generation format, send me (or Martin) mail
> >and we'll get you added to the mailing list.
> >On 8/26/20 7:15 AM, Eliot Miranda wrote:
> >>>On Aug 26, 2020, at 2:45 AM, Jakob Reschke <forums.jakob at resfarm.de>
> >>>???Hi Eliot,
> >>>>Am Mi., 26. Aug. 2020 um 11:20 Uhr schrieb Eliot Miranda
> >>>><eliot.miranda at gmail.com>:
> >>>>If we go with Tonel then we must change it to support method
> >>>>timestamps.?? I have a change set that does this (it is a trivial
> >>>>change).?? And my changes are controlled by a class variable so that
> >>>>the same code can produce Pharo format or a slightly modified
> >>>>format that includes method timestamps.
> >>>>What I don???t understand is why Esteban Lorenzano refuses to accept
> >>>>my changes and allow Tonel to be used either with or without method
> >>>Method timestamps produce merge conflicts inevitably.
> >>a) only when they change, and they change only when methods change
> >>b) inadvertent method timestamp changes can be undone automatically
> >>c) Squeak uses method timestamps; we have lots of tools that use
> >>them. Dropping them just so that we can use Tonel is an example of
> >>the tail wagging the dog. The Tonel interface must instead be made to
> >>function with method timestamps
> >>If there is a decision not to support method timestamps then I will
> >>not support the work. This is a make or break issue for me.
> >>>Can you re-post
> >>>your changeset here?
> >>I???ll post it later today (reading email in bed right now).
> >>>Then we could
> >>>discuss whether to include it at least in the Squeak version. As we
> >>>have heard from Mariano some time ago, VA Smalltalk also puts its
> >>>dialect-specific metadata in the Tonel format, so Squeak would not be
> >>>the first to do so.
> >>>Kind regards,
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