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We had largely cracked such problems for Smalltalk at Digitalk in the early-mid 1990s. Text is just another media for representing object models. I described our solution in an invited talk at OOPSLA'96. wirfs-brock.com/allen/talks/oo wirfs-brock.com/allen/files/pa 1/

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Konrad Hinsen (

@khinsen@scholar.social)

@khinsen

Oct 20, 2021

My claim was that it's hard to discuss about a Smalltalk class, e.g. in e-mail. I still consider that true.

Jonathan Edwards

@jonathoda

Replying to

@awbjs

I remember project Jigsaw. This thread started about my talk at SPLASH about doing version control on images.

alarmingdevelopment.org

Version Control for Structure Editing

That’s the headline for my latest project (with Tomas Petricek), presented at HATRA. [paper] [recorded talk] With this work I am finally confronting the demon cursing my work: version control. If w…

5:49 PM · Oct 22, 2021

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Team/V was Digitalk product that was a team oriented, modular, mirrors-based Smalltalk IDE. Firewall was a prototype that extended Team/V separating IDE & apps into separate images. Jigsaw was the never completed project to merge Digitalk&ParcPlace products using Firewall tech

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I was a software CTO and was pitched that Jigsaw would fix parcplace for us. John Gage at Sun told me about this new Oak language…

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Team/V included a package migrator that could migrate (sets of) ST packages into a live image. Analyzed input packages against current image producing an atomic transformation plan including instance mutation. Guaranteed that final image package state matched input packages