[Vm-dev] New Spur trunk image available

stepharo stepharo at free.fr
Fri Oct 17 16:36:45 UTC 2014

Thanks eliot I'm really eager to try and use Spur on Pharo. This opens 
so much for the future.

On 17/10/14 08:51, Eliot Miranda wrote:
> Hi All,
>     finally the Spur Squeak trunk image is updateable.  The image in 
> http://www.mirandabanda.org/files/Cog/SpurImages/2014-10-16/ was 
> created today and thanks to Bert Freudenberg's latest Monticello work 
> can be updated independently of the non-Spur trunk.  Spur VMs are 
> available in http://www.mirandabanda.org/files/Cog/VM/VM.r3105/ (and 
> later as they appear).  Without wanting to appear too overconfident 
> the Spur system looks to be ready for use apart from image segments 
> (which I hope to have working some time next month).  I'm really 
> interested in having this stress tested by as many people as 
> possible.  Spur really does offer a significant performance and 
> functionality improvement over the current system, but it needs 
> testing to ensure its reliability.
> Esteban Lorenzano is hard at work on the Pharo bootstrap for Spur so I 
> hope Pharo 4 Spur will be available soon.
> As far as trunk goes, using Spur alongside non-Spur trunk is going to 
> be difficult to manage for the near future.  Right now, Spur modifies 
> the Collections, Compiler, Kernel and System packages, and this is 
> done by auto-editing the non-Spur versions of those packages, 
> something I do periodically as new versions arrive.  I also auto-edit 
> trunk configurations (the part of the image update scheme that ensures 
> packages are loaded in the right order when there are dependencies 
> between packages) from non-Spur "update" to Spur "update.spur" forms. 
> This at east means that Spur can keep up with trunk.  But it does 
> /not/ provide a way of committing to Collections.spur, Compiler.spur, 
> Kernel.spur or System.spur without getting out of sync with non-Spur 
> trunk.  Note that apart from these packages, one /can/ safely commit 
> any other package from a Spur image to trunk.
> Right now the plan is to release both V3 (the pre-Spur format) and 
> Spur versions of Squeak 4.6 (I hope it'll be called Squeak 5.0).  This 
> isn't my preference.  I'd like to see just Spur released, once 
> reliability is verified.  But I understand the safety and 
> backward-compatibility concerns (Spur won't be able to load V3 image 
> segments, and vice verse).  The issue is of course that we have this 
> tricky package situation to manage where, to keep the two systems in 
> sync, modifications to Collections, Compiler, Kernel and System need 
> to be committed from V3 and auto-edited to Spur. I think that's too 
> clumsy to be practicable.  Perhaps allowing the two systems to fork 
> and doing a manual merge will be acceptable, but it'll be work to keep 
> them in sync.
> -- 
> best,
> Eliot

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