Squeak-dev July 2023

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[ANN] Squeak by Example Edition 6.0 released
by christoph.thiede＠student.hpi.uni-potsdam.de 21 Jul '23

21 Jul '23

Hi all! We are happy to announce a new edition of the Squeak by Example book today! --> Order the colored paperback: https://www.lulu.com/shop/patrick-rein-and-christoph-thiede/squeak-by-examp… --> Download as free PDF: https://github.com/hpi-swa-lab/SqueakByExample-english/releases/download/6.… Squeak by Example is an introductory book about the Squeak/Smalltalk programming language and environment, guiding students and developers through the environment, language, tools, and the Morphic framework by means of a series of examples and exercises. The new 6.0 edition includes the following highlights: * Complements the Squeak 6.0 release * High-resolution screenshots * New chapter about source control tools * Covers several additional tools (such as the package pane browser, breakpoints, profiling tools, and more) * Extends description of several classes and protocols (Collections, Exceptions, copying, literals, and more) * Extends description of several tools (debugger, inspector, and search tools) * Updates code examples and makes them available on SqueakSource * Updates FAQs and links to further resources * Various improvements throughout the book (revised index, improved screenshots, fine-tuned layout & typography, ... thanks to all our attentive reviewers!) We hope you enjoy reading this book! SBE is a free and open book and is maintained on GitHub [1], so any kind of contribution (errata, improvements, new contents, etc.) is most welcome - just file an issue or drop us an email. Happy Squeaking! Best, Patrick and Christoph [1] https://github.com/hpi-swa-lab/SqueakByExample-english --- Sent from Squeak Inbox Talk

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The Inbox: Help-Squeak-Project-ct.98.mcz
by commits＠source.squeak.org 21 Jul '23

21 Jul '23

Christoph Thiede uploaded a new version of Help-Squeak-Project to project The Inbox: http://source.squeak.org/inbox/Help-Squeak-Project-ct.98.mcz ==================== Summary ==================== Name: Help-Squeak-Project-ct.98 Author: ct Time: 21 July 2023, 12:23:52.490316 am UUID: fed4b138-10f7-044f-893d-353f4c0f2885 Ancestors: Help-Squeak-Project-tpr.97 Updates entry on the Squeak by Example book. =============== Diff against Help-Squeak-Project-tpr.97 =============== Item was changed: ----- Method: SqueakProjectHelp class>>squeakResourcesOnline (in category 'pages') ----- squeakResourcesOnline "This method was automatically generated. Edit it using:" "SqueakProjectHelp edit: #squeakResourcesOnline" <generated> ^(HelpTopic title: 'Squeak Resources Online' contents: 'Web sites Main site of Squeak https://www.squeak.org Issue Tracker for bug reports and other feedback https://bugs.squeak.org Weekly Squeak https://news.squeak.org Downloads for many versions https://www.squeak.org/downloads Main site of OpenSmalltalk VM https://github.com/OpenSmalltalk/opensmalltalk-vm Mailing lists beginners This is the place to ask even the most basic questions. Don''t be afraid. Just ask. The community will help you get started with Squeak. https://lists.squeakfoundation.org/mailman/listinfo/beginners squeak-dev This is the main Squeak mailing list. Join that list to be part in the community. Subscribe to the mail server or read on a forum. https://lists.squeakfoundation.org/mailman/listinfo/squeak-dev For more information on the community and the contribution process, check out the tutorial Contributing to Squeak in the following pages. vm-beginners This is the entry point for people who want to learn more about how Squeak runs on your operating system. You may ask even basic questions. :-) https://lists.squeakfoundation.org/mailman/listinfo/vm-beginners vm-dev This is the place where discussions about the OpenSmalltalk virtual machine happen. Join that list the be a part of the community. https://lists.squeakfoundation.org/mailman/listinfo/vm-dev Books Squeak By Example + A beginners textbook about Squeak''s environment, language, tools, and the Morphic framework, currently based on Squeak 6.0. Available as a colored paperback at lulu and as a free PDF here. The content is maintained on GitHub. - A beginners textbook, currently based on Squeak 5.3 and so a little out of date in some visual aspects and some details. Still a valuable resource. The content is maintained in GitHub at - https://github.com/hpi-swa-lab/SqueakByExample-english - but a prepared and ready to read pdf version can be found at - https://github.com/hpi-swa-lab/SqueakByExample-english/releases Other books Many books about Squeak and Smalltalk in general have been made available: https://squeak.org/documentation/#books!! + ]style[(11 19 1 23 48 1 23 1 14 23 1 27 1 32 1 29 1 49 1 1 13 1 1 10 135 1 61 1 1 10 1 131 62 92 22 25 1 13 144 64 1 1 6 1 131 58 1 1 5 2 17 1 160 4 19 4 31 6 2 1 11 1 75 39)b,I0i,I0,Rhttps://www.squeak.org;I1,I0i,I0,Rhttps://bugs.squeak.org;I1,I… queak.org/documentation/#books;I1!!' readStream nextChunkText) - ]style[(11 19 1 23 48 1 23 1 14 23 1 27 1 32 1 29 1 49 1 1 13 1 1 10 135 1 61 1 1 10 1 131 62 92 22 25 1 13 144 64 1 1 6 1 131 58 1 1 5 2 17 1 187 54 62 63 1 1 11 1 75 39)b,I0i,I0,Rhttps://www.squeak.org;I1,I0i,I0,Rhttps://bugs.squeak.org;I1,I…!!' readStream nextChunkText) key: #squeakResourcesOnline; shouldStyle: false; yourself!

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[ANN] ESUG Tech Awards
by Marcel Taeumel 17 Jul '23

17 Jul '23

Hi all -- Please find attached an announcement from the ESUG board. :-) Best, Marcel *** 🌟 Join the Smalltalk Innovation Celebration at ESUG 2023 Tech Awards! 🚀 You are cordially invited to submit your creations to the ESUG 2023 Tech Awards. This is your golden opportunity to showcase your work, exchange ideas and feedback, and be inspired by fellow Smalltalk enthusiasts worldwide. Plus, there's a chance to win a prize worth up to 500 euros! Join the Smalltalk Tech Awards and help show how cool is Smalltalk. Reply to this message via bouraqadi(a)gmail.com [mailto:bouraqadi@gmail.com]! Noury Bouragadi On behalf of the European Smalltalk Users Group (ESUG) board https://esug.github.io/2023-Conference/conf2023.html [https://esug.github.io/2023-Conference/conf2023.html] The 29th ESUG conference will be held in Lyon, France from 28.8.2023 to 01.9.2023, with Camp Smalltalk 26/27.8.2023.

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Help on getting an OSProcess/OSPipe connected to a SaxHandler
by gettimothy 16 Jul '23

16 Jul '23

I have used with good success Monty's excellent XML suite. The use case I used for SAX processing was with a FileStream on an xml file. result := (SAXHandlerSubclass on: xmlStringOrStream) removeLimits; documentReadLimit: newReadLimit; maxEntityReplacementDepth: newMaxEntityDepth; parseDocument. What I want to do is replace that 'xmlStringOrStream' with something from the OSProcess suite of tools. I have been working with the pipes from the OSProcess using one of the /bin/cat examples in the OSProcess class side. bzcatAFileToPipe: pathString filename:filestring "Pipe bzcat output to some AttachableFileStream...whatever the heck that is...." | err filename in pipe2 output dest child path | path := pathString. filename := filestring. in := OSProcess readOnlyFileNamed: path, filename. pipe2 := OSPipe nonBlockingPipe. output := pipe2 writer. dest := pipe2 reader. err := self stdErr. child := UnixProcess forkJob: '/bin/bzcat' arguments: nil environment: nil descriptors: (Array with: in with: output with: err). in close. " (Delay forSeconds: 1) wait. child sigterm." ^ pipe2 I can successfully stream the output to the terminal by changing the descriptors to: descriptors: (Array with: in with: err with: err). Here is an attempt to just stream the data to a Transcript... |pipe path filename| Transcript clear. path := '/home/wm/' . filename := 'xmlstart.bz2'. pipe := UnixProcess bzcatAFileToPipe: path filename: filename. [Transcript show:(pipe upToEnd)] forkAt: Processor userBackgroundPriority named:'Dude' and nothing happens... The goal of all this is to be able to replace the FileStream in the below example with "somthing" from the OSProcess. |ios| Transcript clear. ios := (FileStream readOnlyFileNamed:('/home/wm/usr/src/myxmlfile.xml')). [(DocDemoSaxHandler on: ios) pingevery:100000; debug:true; optimizeForLargeDocuments;parseDocument] timeProfile . thx in advance for any pointers. cordially.

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"prepending" data to a stream...
by gettimothy 15 Jul '23

15 Jul '23

Hi Folks. I have a bzcat AttachableFileStream that I need to prepend some data to. If I could concatenate two streams, it would look like this: ios := ReadStream on:'<?xml version="1.0" encoding="UTF-8"?> bzcat := "My AttachableFileStream". fooios := ios, bzcat. Nothing obvious showed up in my brief search. anybody have any experience with this? thx in advance.

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(Off-topic) Peter Crowther is now Rachel Crowther
by Rachel Crowther 15 Jul '23

15 Jul '23

Posted so that folks here have an audit trail, rather than me just showing up suddenly with my new address. Take care, Rachel

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Test failures in OSProcess are ByteStrings read only nowadays?
by gettimothy 14 Jul '23

14 Jul '23

My apologies if they always have been. UnixProccessAccessorTestCase >> #testArgsAsFlatArrayAndOffsets errors out on an attempt to modify a character in a ByteString. seems odd as I seem to recall being able to modify strings in the past. cordially, tty

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ClassType Re: Re: [Cryptography Team] Design evolution (was Re: Re: [Cuis-dev] [Recovered] AGAIN! This is the third /efourth time
by rabbit 14 Jul '23

14 Jul '23

So we have: >>> >> >>> ••• ClassType ••• < #ClassType !! <ClassName !! ASN1UTF8String !! Exportable {true|false}>> !! <IVarRecords !! #SequenceOfIVarRecord !! <IVarRecord !! IVarName !! ClassTypeName !! ASN1Type>> !! <MethodRecords !! #SequenceOfMethodRecord !! <#MethodRecord !! MethodName !! ReturnClassTypeName !! ReadOnly !! RequiresTransaction> > > ••• rabbit ❤️‍🔥🐰

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Design evolution (was Re: [Cryptography Team] Re: [Cuis-dev] [Recovered] AGAIN! This is the third /efourth time
by rabbit 14 Jul '23

14 Jul '23

I fried my laptop by spilling my ready to drink café con leche all over. Elbows and precarious places! My desktop is unplugged so I’ll get that up. In the meantime, I’ve been getting super high and doing the art. Here are my notes…who is saying I am in any way diminished? I do my best work, in the Spirit. ••• ••• Kittens ••• KittyOracle KittyCommander KittyLitter BoxOfKittens <FarIntroducer> A Neighbor learns. As immediate data access is allowed from a shared memory object, it is ReadOnly. If a ModificationException occurs, change the Stub method to forwarding. Determine whether to flip the Neighbor to a NearPromise. Graph walking for #passByCopy of #passByReference, w Neighbor substitution. #securedHash of #identityHash is OID in LocalKittyOracle’s etSpace #oidHash is the 2nd hash of the securedHash, identity in Neighbors, Far. WriteSemaphore waits on Oracle’s registered object’s Semaphore for critical access, inside object is marked Writable, modifications made and back to ReadOnly. ••• Networking ••• eventualContext with Question out to the remote pending Send. The 4th Estate, a 4th wire. Each Protocol describes • set of MessageHeaders • name • oid • stateMachine • sending / processing protocol • Plugs into GateKeeper •••> Anonymous Classes <Unknown> can convert between from a ClassType, to a Tuple and back, with Stub generation < #ClassType !! <ClassName !! ASN1UTF8String !! Exportable {true|false}>> !! <IVarRecords !! #SequenceOfIVarRecord !! <IVarRecord !! IVarName !! ClassTypeName !! ASN1Type>> !! <MethodRecords !! #SequenceOfMethodRecord !! <#MethodRecord !! MethodName !! ReturnClassTypeName !! ReadOnly> > > ••• Hierarchy ••• Whisper • generalized & pluggable with a Protocol. • <Gate !! Gozer !! GateKeeper !! KeyMaster> Layer5Session • EndpointThunks •••> InMemoryThunk •••> SocketThunk •••> PipeThunk •••> Bluetooth •••> RF Transceiver •••> SATCOM… • SessionProtocols to rendezvous with EncryptionProtocols •••> InMemory •••> Clear •••> PARROTTalk v3.6, v3.7, v3.9 •••> SSL •••> SSH •••> Signal, one day •••> SP-ADS Layer6Presentation • Presentation layer manages stack and installs correct encoderThunk, using a Session. • Far • Hymn • Kafka ••• Don’t be afraid to start over again. This time you’re not starting from scratch. You’re starting from experience. ••• Crypto Feature list: •••> All Promises <Near ! Neighbor ! Far> •••> BoxOfKittens <FarIntroducer> •••••••> Kitty <NeighborIntroducer> •••••••> KittyOracle •••••••> KittyCommander •••••••> KittyUI •••••••> KittyLitter, per HyperCore •••> All of ParrotTalk <v3.6 ! v3.7 ! v3.9> •••> Whisper framework •••> ProtocolStateCompiler •••> TraceMonitor •••> ELinda •••> robust security assets •••••••> Ciphers (symmetric and asymmetric) •••••••> HashFunctions •••••••> SecureRandoms •••••••> Key Exchanges •••••••> Signatures •••••••> security encodings <FEC !! Archive !! PBE !! PasswordExtenders> •••••••> ASN1 Streams, with substitution ability during graph walking. •••> Networking Protocols: •••••••> Whisper <Framework> •••••••> Hymn <Layer6> •••••••> Far <Layer 6> •••••••> Kafka <Layer 6> •••••••> InMemory <Layer 5> •••••••> InDaClear <Layer 5> •••••••> EParrotTalk <Layer 5> •••••••> SP-ADS <Layer 5> •••••••> SSH <Layer 5> •••••••> SSL <Layer 5> •••••••> Signal <Layer 5> ••• rabbit ❤️‍🔥🐰 On Mon, Jul 10, 2023 at 23:21, rabbit <[rabbit@callistohouse.org](mailto:On Mon, Jul 10, 2023 at 23:21, rabbit <<a href=)> wrote: > I’m also going to offer access to the eventualContext of a Promise, whether Local, Neighbot or Far. Offer Revolution and ping / status, remote event registration on the EventuaMessageSend. > > With readOnlyMarks added to the AnonymousStructure encoded object, #passByCopy we have: > > <className !! IVarsNames !! ASN1TypeDescription !! MethodNames !! ReadOnlyMarks>, Object serialized by this ASN1>, 6 arity. > > With direct read access to a local kitty Near access to cached / copied data, when a method not marked as readOnly is sent remotely to a different kitty cat, I will flip the “Near Access” to cache data to off, thus converting the Near reference to the cached data into a NearPromise, queuing access in the msgBuffer of this sort of Promise, until completion of the write, depending on policy. > > I’d love to read about #beReadOnly but I cannot find it. I’d also like to have the vm send eventual events when state changes, like <self changed: iVarName>, thus triggerEvent:. With a BeSilent, this feature could be turned on and off. > > ••• rabbit ❤️‍🔥🐰 > > On Mon, Jul 10, 2023 at 22:25, rabbit via Cuis-dev <[cuis-dev@lists.cuis.st](mailto:On Mon, Jul 10, 2023 at 22:25, rabbit via Cuis-dev <<a href=)> wrote: > >> Well it’s been a weekend. At one point I was starting the BoxOfKittens and the image froze uninterruptably. Heh. It not freezing but I’ve tangled something. I’ve been engaged in very aggressive sculpting and I totally lost it along my way. What would I say? Some highlights… >> >> • added #when:then: to ProtoObject to do Linda tuple matching of the whenTestTuple then: runs the thenReactor. And added Linda protocol there too, so any objects can do tuple matching. >> •••> arity >> •••> Linda match: converts any object to a tuple of its fields, then match:s with the test tuple. >> • mass conversion of what was Session hierarchy to Gozer. >> • defining a ClassType to describe a <class name !! method names !! readOnlyMarks> (IVars go into a tuple, methods into a ClassType. I’m going to use one of the Available types to pass an anonymous object, along with ASN1 string notation of structure of the Type, a method interface and the object serialized all. So Java and such can talk it with ASN1. Ubiquitous. >> >> <className !! IVarsNames !! ASN1TypeDescription !! MethodNames !! Object serialized by this ASN1>, 5 arity. >> >> I like building analogs and describing a story, BoxOfKittens :) , so for teleport comms it’s GhostBusters! Session is Gozer, there are many that come through a Gate, the Server. These are not at all different between different uses. They’re invariant in class and operations, only difference is the GateKeeper, a different one for each different Protocol, ParrotTalk, SSL, SSH, Signal, TLS 1.2. Whisper, Far, Probe, and now InMemory and a #Clear protocol and GateKeeper. Every Protocol of communication has a unique GateaKeeper. I’m hoping to unify all Protocols ti use the existing Gate and Gozer and KeyMaster, though a different KeyMaster is possible. >> >> The opening and bringing forth another GozerStayPuff is the obligation of the GateKeeper, the Operation classes. ParrotTalk v3.6, v3.7, v3.9 all have different categories, whith their protocol rendezvous messages, carefully defined in ASN1. >> >> There are also Sessions, GateKeepers, in layer 5 <ParrotTalks, InMemory> and different keepers in layer 6: <Far, NeighborGateKeeper, Hymn>. >> >> Hymn will have Gozers to establish replication and bridging. It also will use group protocol to share encryption for replication. This leads to collaboration. We will explore ideas of dynamic demand access multiple access with establishing collaboration groups called a Hymn. As concurrent resources are gathered, Singers can offer resources to solve problems through parallelism. Audience participation. Hymn conducting all the way from the Sisters to the Orchestra to the Choir. Kittens the whole lot of em. >> >> We shall see. >> >> ••• rabbit ❤️‍🔥🐰 >> >> On Sun, Jul 9, 2023 at 11:55, rabbit via Cuis-dev <[cuis-dev@lists.cuis.st](mailto:On Sun, Jul 9, 2023 at 11:55, rabbit via Cuis-dev <<a href=)> wrote: >> >>> Hey, I am a touch frustrated. Recovered with <49>. The code I wrote to generate classes and methods has been corrupting my image, or rather mucking to the changes. I was having old code versions being loaded and breaking bad. I was publishing a lot of garbage because when running the BoxOfKittens, I was generating several SharedNears, now called Neighbors. This subclass generation and the method compilation is being done it the following methods...I am just going to leave it turned off for now and stay focused on my objective. It is an example of corruption occurring, if that helps anyone. If one could tell me how to better generate these artifacts, that would be outstanding!• >>> >>> ••• >>> >>> The #buildOnClass is called from a class creation method >>> >>>> buildOnClass: eClazz >>>> >>>> |refClass | >>>> refClass := self stubClass >>>> subclass: (eClazz name, 'Stub') asSymbol >>>> instanceVariableNames: '' >>>> classVariableNames: '' >>>> poolDictionaries: '' >>>> category: self userClassCategoryString. >>>> >>>> "Copy all methods, up to Object, to the new refClass, with redirectMessage forwarding." >>>> self copyMethodsToClass: refClass fromClass: eClazz upToClass: Object. >>>> >>>> ^ refClass >>> >>>> ••• >>> >>>> copyMethodsToClass: refClass fromClass: valueClazz upToClass: rootClass >>> >>>> | arguments classes newMethodString | >>>> "Collect classes to contribute message protocol." >>>> classes := valueClazz allSuperclasses select: [ :clazz | (Object ~~ rootClass) and: [ Object inheritsFrom: clazz] ]. >>>> >>>> "contribute message protocols." >>>> classes do: [:thisClazz | >>>> thisClazz methodDictionary keysAndValuesDo: [:selector :method | >>>> arguments := method tempNames first: method numArgs. >>>> newMethodString := self buildForwardingMethod: selector contents arguments: arguments. >>>> Compiler >>>> compile: newMethodString >>>> environment: refClass environment >>>> notifying: nil >>>> trailer: method trailer >>>> ifFail: [nil]]]. >>>> >>>> ••• >>>> >>>> buildForwardingMethod: selector arguments: arguments >>>> >>>> | argumentString selectorStream | >>>> argumentString := ((arguments inject: ''writeStream into: [:stream :argument | stream nextPutAll: argument, ' ']) contents). >>>> selectorStream := '' writeStream. >>>> (selector subStrings: $:) with: arguments do: [:keyword :argument | selectorStream nextPutAll: keyword, ': ', argument, ' ']. >>>> ^ selectorStream contents, ' >>>> >>>> ^self redirectMessage: (Message selector: ', selector asSymbol printString, ' arguments: #{', argumentString, '}).' >>> >>> Alright then, >>> >>> -- >>> ••• rabbit ❤️‍🔥🐰

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squeak ReadStream from bzcat stdout output possible?
by gettimothy 14 Jul '23

14 Jul '23

Hi Folks. I have a 21Gb bzip file I would rather not decompress as disk space is at a semi-premium. the bzcat command allows me to "extract" the contents to stoud bzcat humungousfile.bz2 | less gives me the output I want to process For running XMLSax on a file, I have some existing code to use... |ios| ios := (FileStream readOnlyFileNamed:('/your/path/to/the/big/xml/file.xml')). [(DocDemoSaxHandler on: ios) pingevery:100000; optimizeForLargeDocuments;parseDocument] timeProfile . What I would like to do is have, from within Squeak access to that bzcat output via some sort of ReadStream. Doable? thx in advance. tty

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