February 2022 - Pharo-users

EXIF / JPEG metadata
by Alistair Grant Nov. 30, 2025

Nov. 30, 2025

Hi Everyone, As far as I can tell, JPEGReadWriter in Pharo 7 doesn't read (or write) the image metadata, e.g. title, keywords, exposure time, etc. Is anyone aware of a package that does? Thanks! Alistair

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Re: [Pharo-users] Personal wiki / information manager
by Evan Donahue Sept. 25, 2023

Sept. 25, 2023

Seems that Pharo is a magnet for this kind of project. I've been writing one as well and using it to organize my research notes. Does anyone working on personal info mgmt tools want to talk offline? I expect we're running into some of the same issues, both conceptual and technical. Evan

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ESUG 2022 call for presentations & Call for student volunteers
by stephane ducasse April 23, 2022

April 23, 2022

ESUG 2022 Novisad Serbia 22. â 26.8. https://esug.github.io/2022-Conference/call2022.html You can support the ESUG conference in many different ways: Sponsor the conference. New sponsoring packages are described at http://www.esug.org/supportesug/becomeasponsor/ <http://www.esug.org/supportesug/becomeasponsor/> Submit a talk, a software or a paper to one of the events. See below. Attend the conference. We'd like to beat the previous record of attendance (170 people at Amsterdam 2008)! Students can get free registration and hosting if they enroll into the the Student Volunteers program. See below. <>Developers Forum: International Smalltalk Developers Conference We are looking for YOUR experience on using Smalltalk. You will have 30 min for presentations and 45 min for hands-on tutorials. The list of topics for the normal talks and tutorials includes, but is not limited to the following: XP practices, Development tools, Experience reports Model driven development, Web development, Team management Meta-Modeling, Security, New libraries & frameworks Educational material, Embedded systems and robotics SOA and Web services, Interaction with other programming languages <>Teaching Pearls and Show us Your Business New this year!!! We added two types of sessions in addition to the regular talks and show us your projects sessions. Show your business 10 min session (Get prepared!!) Teaching pearls : we want some session on how to teach some design aspects. We want your tip and tricks to teach Smalltalk or OOP. We expect to have several 10 to 15 min sessions aggregated. <>How to submit? Make a Pull Request here https://github.com/ESUG/esug.github.io/tree/source/2022-Conference/talks Or but only if you are not connected to the worldâ¦ send an email to stephane.ducasse(a)inria.fr Title: [ESUG 2022] Please follow the template below the email will be automatically processed! Name: Email: Abstract: Bio: Call for Student Volunteers Student volunteers help keep the conference running smoothly; in return, they have free accommodations, while still having most of the time to enjoy the conference. Pay attention: the places are limited so do not wait till the last minute to apply. Conference details: Send an email to stephane.ducasse at inria.fr and serge.stinckwich at gmail.com with: title: [ESUG 2022 Student] name, gender, university/school, country, email address short description of you and why you are interested in participating For which period is accommodation covered? Accommodation is covered from Sunday 21 August until Friday 26 August 2022 (including nights from Sunday to Monday and from Thursday to Friday). Students will be hosted in student rooms. ESUG additionally covers for the lunches during the week and one dinner. Duties include handling registration as people arrive at the conference, filling coffee machines, collecting presentation slides for ESUG right after the presentation is given, being present at an information desk to answer questions, and generally being helpful. Student volunteering makes the conference better, takes a fairly small amount of time and doesn't significantly interfere with enjoying and learning from the conference. Please Note, this role requires discipline and constant attention to all attendees. Information about hotel Student Volunteer rooms are booked at (to be announced). If you are student volunteer, do not book yourself, we have arranged the booking already!

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WebDav and CalDav in Pharo ?
by CÃ©drick BÃ©ler April 13, 2022

April 13, 2022

Hi all, I do some experiments with iCal. For now I serve a full calendar over HTTP. Not bad, but it is read only. Iâd like to try CalDAV. I was looking for it, and also webDAV. Gofer it smalltalkhubUser: 'UdoSchneider' project: 'FileSystemNetwork'; configuration; load. #ConfigurationOfFileSystemNetwork asClass project stableVersion load: 'Webdav' Iâve found the project of Udo, but it doesnât load on P8. I think this is due to the stream refactoring. Right now the image hung. Iâll try maybe to load it manually. But I was wondering oof there were other alternatives ? TIA, CÃ©drick

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Too many parenthesis - a matter of syntax
by Kasper Osterbye March 1, 2022

March 1, 2022

Cheers all I have noticed that I often ends up with quite a number of nested expressions, for example: (((json at: 'tree') select: [ :e | (e at: 'type') = âblob' ]) collect: [:e | Path from: (e at: 'path')]) select: [ :p | p segments last in: [ :name | (name endsWith: '.md') | (name endsWith: '.mic') ] ] What kind of proposals (if any) have been for a different syntax which could give a more streamlined syntax? My own thinking has been around an alternative to the cascade semicolon. What symbol to use does not matter for me, but something like json at: âtree' Âº select: [ :e | ((e at: 'type') = 'blobâ)]Âº collect: [:e | Path from: (e at: 'pathâ)]Âº select: [ :p | p segments last in: [ :name | (name endsWith: '.md') | (name endsWith: '.mic') ] ] Basically, a send the right hand expression to the result of the left hand expression. Has anyone ever tried this, or is it just one of the many small annoyances best left alone? Best, Kasper

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Image
by kikka Feb. 24, 2022

Feb. 24, 2022

Hi everybody, I have a big problem. After working on my application I closed Pharo. When I got back the shortcut wasn't working any more and I realized my image got ruined. I could recover just a very old version of my C:\Seaside-3.1-portable\Seaside-3.1-portable.app\Contents\Resources\Pharo4.0 -portable.image (no recent backup). I have seen that all the changes I have developed can be seen in C:\Seaside-3.1-portable\Seaside-3.1-portable.app\Contents\Resources\Pharo4.0 -portable.changes I was wondering if it was possible to load all the changes on the old Pharo4.0-portable.image without losing all my work. Hanks in advance for any help. Regards. Federica -- Questa e-mail Ã¨ stata controllata per individuare virus con Avast antivirus. https://www.avast.com/antivirus

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Changes to class not recorded in change.log?
by Stewart MacLean Feb. 21, 2022

Feb. 21, 2022

Hi, The worst case scenario has just happened - my image is hosed. I've managed to recover a previous set of change/image files (thanks CrashPlan!). Then I've replayed all the intervening changes - however I find that some instance variables that I had defined haven't been reflected in class shape changes. I notice all the changes for the complete change log are for Method, and Do It (image saves) Surely class shape changes should be recorded as well? Is this a bug? Cheers, Stewart Platform Mac Mini Pharo 9.0.0 Build information: Pharo-9.0.0+build.1573.sha.0e09d756fc99383cbb498565200d9e5e9841ce11 (64 Bit)

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Fwd: ESUG 2022 call for presentations And Call for student volunteers
by stephane ducasse Feb. 20, 2022

Feb. 20, 2022

A reminderâ¦ S > Begin forwarded message: > > From: "stephane.ducasse(a)free.fr" <stephane.ducasse(a)free.fr> > Subject: ESUG 2022 call for presentations And Call for student volunteers > Date: 13 January 2022 at 13:23:44 CET > > ESUG 2022 > Serbia 22. â 26.8. > > You can support the ESUG conference in many different ways: > Sponsor the conference. New sponsoring packages are described at http://www.esug.org/supportesug/becomeasponsor/ <http://www.esug.org/supportesug/becomeasponsor/> > Submit a talk, a software or a paper to one of the events. See below. > Attend the conference. We'd like to beat the previous record of attendance (170 people at Amsterdam 2008)! > Students can get free registration and hosting if they enroll into the the Student Volunteers program. See below. > <>Developers Forum: International Smalltalk Developers Conference > > We are looking for YOUR experience on using Smalltalk. You will have 30 min for presentations and 45 min for hands-on tutorials. > The list of topics for the normal talks and tutorials includes, but is not limited to the following: > XP practices, Development tools, Experience reports > Model driven development, Web development, Team management > Meta-Modeling, Security, New libraries & frameworks > Educational material, Embedded systems and robotics > SOA and Web services, Interaction with other programming languages > <>Teaching Pearls and Show us Your Business > > New this year!!! We added two types of sessions in addition to the regular talks and show us your projects sessions. > Show your business 10 min session (Get prepared!!) > Teaching pearls : we want some session on how to teach some design aspects. We want your tip and tricks to teach Smalltalk or OOP. > We expect to have several 10 to 15 min sessions aggregated. > <>How to submit? > > Make a Pull Request here https://github.com/ESUG/esug.github.io/tree/source/2022-Conference/talks > > Or but only if you are not connected to the worldâ¦ send an email to stephane.ducasse(a)inria.fr > > Title: [ESUG 2022] Please follow the template below the email will be automatically processed! > Name: > Email: > Abstract: > Bio: > > Call for Student Volunteers > Student volunteers help keep the conference running smoothly; in return, they have free accommodations, while still having most of the time to enjoy the conference. > > Pay attention: the places are limited so do not wait till the last minute to apply. > > Conference details: > Send an email to stephane.ducasse at inria.fr and serge.stinckwich at gmail.com with: > > title: [ESUG 2022 Student] > name, gender, university/school, country, email address > short description of you and why you are interested in participating > For which period is accommodation covered? Accommodation is covered from Sunday 21 August until Friday 26 August 2022 (including nights from Sunday to Monday and from Thursday to Friday). Students will be hosted in student rooms. ESUG additionally covers for the lunches during the week and one dinner. > > Duties include handling registration as people arrive at the conference, filling coffee machines, collecting presentation slides for ESUG right after the presentation is given, being present at an information desk to answer questions, and generally being helpful. Student volunteering makes the conference better, takes a fairly small amount of time and doesn't significantly interfere with enjoying and learning from the conference. Please Note, this role requires discipline and constant attention to all attendees. > > Information about hotel > Student Volunteer rooms are booked at (to be announced). If you are student volunteer, do not book yourself, we have arranged the booking already! >

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[ANN] Pharo LZ4 Tools
by Sven Van Caekenberghe Feb. 20, 2022

Feb. 20, 2022

Hi, Pharo LZ4 Tools (https://github.com/svenvc/pharo-lz4-tools) is an implementation of LZ4 compression and decompression in pure Pharo. LZ4 is a lossless compression algorithm that is focused on speed. It belongs to the LZ77 family of byte-oriented compression schemes. - https://en.wikipedia.org/wiki/LZ4_(compression_algorithm) - https://lz4.github.io/lz4/ - https://github.com/lz4/lz4 Both the frame format (https://github.com/lz4/lz4/blob/dev/doc/lz4_Frame_format.md) as well as the block format (https://github.com/lz4/lz4/blob/dev/doc/lz4_Block_format.md) are implemented. Dictionary based compression/decompression is available too. The XXHash32 algorithm is also implemented. Of course this implementation is not as fast as highly optimised native implementations, but it works quite well and is readable/understandable, if you like this kind of stuff. It can be useful to interact with other systems using LZ4. Sven

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UK Smalltalk User Group meeting - 23 February 2022
by Giovanni Corriga Feb. 19, 2022

Feb. 19, 2022

For this month's UKSTUG meeting, we'll open the floor to the whole audience and let people show what they are working on. If you have an interesting project to show, or if you'd like to get some help with some hard problem, just show up and be ready to present! This will be an online meeting from home. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/UKSTUG/events/284113812/ ) to receive the meeting details. Donât forget to bring your laptop and drinks!

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[ANN] Stargate v7.0.1 [v7.0.1] released!
by Buenos Aires Smalltalk Feb. 18, 2022

Feb. 18, 2022

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[ANN] Stargate-Consul v3.0.1 [v3.0.1] released!
by Buenos Aires Smalltalk Feb. 18, 2022

Feb. 18, 2022

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[Issue tracker] Please check your older issues
by Marcus Denker Feb. 15, 2022

Feb. 15, 2022

Hi, We are seeing lots of issue that are still open, but already fixed or just not valid anymore. e.g. - the fix that was merged but the issue was not closed (sometimes GitHub has problems doing that) - Bug was fixed independent of the issue - The issue is just not relevant anymore It is often quite time consuming to even find out that an issue is already fixedâ¦ It would be nice if everyone could check the issues that - you submitted yourself - that are assigned to you - [Bonus] where you were part of some discussion https://github.com/pharo-project/pharo/issues Marcus

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Spec border widths of 0 are showing as lines?
by Stewart MacLean Feb. 11, 2022

Feb. 11, 2022

Hi all, I have set the border widths of SpBoxLayout to 0, but there are still lines showing between the various components. Please see attached. As a work around, I thought to set the color of the border to the background color of each panel, but SpBoxLayout doesn't have a borderColor: method. How do I get borders to not show so that adjacent panels blend? And how do I set the color of borders? I am using SpRoassalPresenters and have tried setting the borderColor against them to no effect. Thanks, Stewart

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What is "Fluid"?
by contactme＠kathe.in Feb. 11, 2022

Feb. 11, 2022

I have attached 2 cropped screen-captures of the same class displayed in the class browser; class-smalltalk.png is the regular class syntax, class-fluid.png is the same class but with the "Fluid" checkbox selected, and shows a different syntax. May I know what that is all about? There's a different terminology too, something called "slot", which I have faint memories of being quite like that in "Self" environments. Thank you, ~Kathe Â

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What am I doing wrong with Spec2 in Pharo 9?
by Robert Briggs Feb. 10, 2022

Feb. 10, 2022

I haveÂ a subclass of SpTablePresenter which correctly displays a list of items.Â It is set up to activateOnDoubleClick as I want to open another SpPresenter I have created on the selected table row using the value in the first column to complete the presenter.Â My SpTablePresenter headed Element Attributes is shown bottom left in the attached screenshot. The class method top right reports that valueAtColumn:row: is sent but not implemented and yet it clearly is implemented by the superclass of my presenter (and I have used the method elsewhere in my project (NB: this method is just an instrument at the moment so that I can check what is happening. Double clicking a table row executes the method openAttributeEditorOn:Â but the debugger reports instance of my presenter class did not understand valueAtColumn:row: So what am I doing wrong here? Advice please. Regards Bob Briggs

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Sharing and publishing Pharo powered data stories
by Offray Vladimir Luna CÃ¡rdenas Feb. 10, 2022

Feb. 10, 2022

Hi, We are combining Markdeep and STON in a light format to share and publish Pharo powered data stories and visualizations written/crafted in Glamorous Toolkit's Lepiter. In this link you can find a demo of the published output, that, of course can be imported back to Lepiter: https://mutabit.com/repos.fossil/malleable-systems/doc/trunk/wiki/en/mallea… And below you can find a preview of this data story. Our light format have some differential values over other popular data stories publishing formats, like Jupyter Notebook: a) Its human and browser readable, in contrast IPynb JSON and Python exports are readable by one, but not the other. b) it only requires (3mb) Fossil + (350K) Markdeep to be stored, versioned, shared and published. Other DVCS, web folders can be used and is a big contrast with complicated and/or oligopolistic support to make a format (Ipynb) web renderable. c) The same published document can be imported back to Lepiter. When a Jupyter document is published as HTML, it can not be imported back from there to Jupyter (I imagine something similar happens with RStudio or OrgMode, but I have not experienced data workflows on the last tools by myself). And here is the respective Nitter/Twitter thread with details and alternative narrative: https://nitter.net/offrayLC/status/1490130769603444742#m <https://nitter.net/offrayLC/status/1490130769603444742#m> Cheers, Offray https://i.imgur.com/GhbaSZc.png

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grants Master Internship / offres de stage Master
by Pierre Bommel Feb. 10, 2022

Feb. 10, 2022

(sorry for redundancies) Hello, Bonjour, Hola, We are looking for a Master internship to work on Cormas, a simulation platform (https://github.com/cormas/cormas , or see here for our presentation at ESUG: https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view) Nous recherchons un stagiaire de Master pour travailler sur Cormas, une plateforme de simulation (https://github.com/cormas/cormas , cf. notre prÃ©sentation Ã ESUG: https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view) Estamos buscando un estudiante de MaestrÃa para trabajar en Cormas. Voici l'annonce en franÃ§ais (in English below) : https://www.hdigitag.fr/fr/les-offres-de-stage-digitag/ *Simulation participative de la gestion des ressources renouvelables dans des environnements hybrides* *Mots-clÃ©*: Simulation participative, Computer Vision , Smalltalk, Cormas * *DurÃ©e souhaitÃ©e du stageÂ (nombre de mois):*8 * *Date de dÃ©but du stage*: 1/02/2021 * *UnitÃ© de recherche*: Green, Cirad * *Contact*: Bommel Pierre : bommel(a)cirad.fr * *#DigitAg*: Axe 2 : Innovations en agriculture numÃ©rique, Axe 6 : ModÃ©lisation et simulation (systÃ¨mes de production agricole) / Challenge 1 :Â Le challenge agroÃ©cologique, Challenge 2 :Â Le phÃ©notypage rapide, Challenge 6 :Â La gestion des territoires agricoles, Challenge 7 :Â IntÃ©gration de lâagriculture dans les chaÃ®nes de valeur, Challenge 8 : DÃ©veloppement agricole au Sud Lâambition dâÃ©liminer les interfaces physiques qui permettent lâinteraction avec les machines est une idÃ©e ancienne dans le monde de lâinformatique qui a pris plusieurs directions. La plus emblÃ©matique pour le grand public a Ã©mergÃ© en 2005 sous le nom de âprojet Natalâ repris et dÃ©mocratisÃ© par Microsoft dans sa derniÃ¨re version baptisÃ©e âAzure Kinectâ (2019). Ce capteur dÃ©tecte les mouvements et les objets dans le champ de vision de lâutilisateur pour produire des rÃ©sultats dans un logiciel. Il a Ã©tÃ© abondamment dÃ©tournÃ© et enrichi depuis ses dÃ©buts grand public pour permettre de nouvelles maniÃ¨res dâinteragir avec les machines. Par ailleurs, le groupe de chercheurs Ã lâorigine de la crÃ©ation dâune plateforme de modÃ©lisation Ã base dâagents baptisÃ©e Cormas [1] fait actuellement face Ã des besoins accrus dâinteractivitÃ©s dans les simulations participatives. BasÃ©e sur le langage Smalltalk, Cormas est dÃ©veloppÃ©e depuis la fin des annÃ©es 1990 par une Ã©quipe fortement interdisciplinaire. Au-delÃ des usages traditionnels de la modÃ©lisation agents, Cormas se dÃ©marque des autres plateformes par des processus originaux de modÃ©lisation : lâapproche ComMod (pour Companion Modeling : modÃ©lisation dâaccompagnement [2]), qui vise Ã proposer des outils permettant de participer activement Ã la conception dâun modÃ¨le, mais aussi de sâimmerger dans des situations de jeux interactifs. Le jeu (de plateau ou informatisÃ©) sert alors de support pour Ã©changer sur une situation vÃ©cue. En 2012, pour la premiÃ¨re fois, lâÃ©quipe utilisait un video-projecteur Ã ultra-courte focale pour projeter sur une table un plateau de jeu. Ce simple changement a induit des comportements radicalement diffÃ©rents leur permettant une interaction beaucoup plus naturelle avec les simulations informatisÃ©es. En outre, la configuration spatiale des acteurs favorise les interactions sociales. Mais jusquâÃ aujourdâhui, la saisie manuelle par lâanimateur des dÃ©cisions prises par les joueurs reste nÃ©cessaire ce qui rÃ©duit la fluiditÃ© et la spontanÃ©itÃ© des interactions. LâÃ©quipe en charge du dÃ©veloppement de Cormas souhaite investiguer les possibilitÃ©s offertes par les nouvelles applications liÃ©es Ã la dÃ©tection dâobjets et de mouvements en portant un prototype de simulation participative dans le champ de la simulation hybride entre modÃ¨le informatique et jeu physique. Ce travail de preuve de concept appliquÃ© au modÃ¨le ReHab (modÃ¨le Ã©cole de ComMod) nÃ©cessitera de mettre au point des mÃ©thodes de dÃ©tection fiables dâobjets physiques pour Ãªtre intÃ©grÃ©es dans le calcul du nouvel Ã©tat simulÃ©. Aujourdâhui, Cormas sâappuie sur Pharo (Smalltalk open-source). Cette solution est dÃ©veloppÃ©e par lâINRIA et par un consortium de chercheurs et dâindustriels. La communautÃ© dynamique propose un ensemble de packages permettant de mutualiser le dÃ©veloppement de fonctionnalitÃ©s qui pourraient Ãªtre mobilisÃ©es pour proposer un prototype pour des simulation participative et la dÃ©tection dâobjets *English* : https://www.hdigitag.fr/en/digitag-master2-internship-offers/ *Participatory simulation of renewable resource management in hybrid environments* * *Keywords*: Participatory simulation, Computer Vision , Smalltalk, Cormas * *Duration*: 8 months * *Desired start date*: 1/02/2021 * *Research Unit*: Green, Cirad * *Contact*: Bommel Pierre â bommel(a)cirad.fr * *#DigitAg*: Axe 2,Axe 6 â Challenge 1,Challenge 2 ,Challenge 6 ,Challenge 7, Challenge 8 The ambition to remove the physical interfaces that allow interactions with computers is an old idea in the IT world that took several directions. The most emblematic one for the general public emerged in 2005 under the name of âProject Natalâ taken up and democratized by Microsoft in its latest version called âAzure Kinectâ (2019). This sensor detects movements and objects in the userâs field of vision to produce results in softwares.Â It has been abundantly diverted and enriched since its beginnings for the general public to allow new ways of interacting with computers. In addition, the group of researchers behind the development of an agent-based modeling platform called Cormas [1] is currently facing increased needs for interactivity in participatory simulations. Based on the Smalltalk language, Cormas has been developed since the late 1990s by a highly interdisciplinary team. Beyond the traditional uses of agent modeling, Cormas differs from other platforms by innovative modeling processes: the ComMod approach (Companion Modeling [2]), which aims to provide tools to actively participate in the design of a model, but also to immerse oneself in interactive game situations.Â The game (board or computer game) is then used as a support to exchange on a real-life situation. In 2012, for the first time, the team used an ultra-short focal projector to project a game board on a table. This simple change induced radically different behaviors of the actors allowing them to interact more naturally with computer simulations. In addition, the spatial configuration of the actors favors social interactions.Â But until today, manual input by the facilitator of the decisions taken by the players remains necessary, which reduces the fluidity and spontaneity of interactions. The team in charge of Cormasâ development wishes to investigate the possibilities offered by new opportunities related to the detection of objects and movements by bringing a prototype of participatory simulation in the field of hybrid simulation between computer model and physical game.This proof of concept work applied to the ReHab model (ComModâs school model) will require the development of reliable detection methods for physical objects to be integrated into the calculation of the new simulated state. Today, Cormas relies on Pharo (an open-source Smalltalk).Â This solution is implemented by INRIA and a consortium of researchers and industrialists. The dynamic community proposes a set of packages allowing to mutualize the development of functionalities that could be mobilized to propose a prototype for participative simulation and object detection

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Error when running OSUnixSubprocess - posix_spawn() error
by bajger＠gmail.com Feb. 9, 2022

Feb. 9, 2022

Greetings Pharoers! I have following problem when using OSSubprocess library. If I run a method that uses code below, it fails: Error: Error: posix_spawn(), code: 9, description: Bad file descriptor Any thoughts, hints are welcome! My code redirects stdout, stdin in order to catch system outputs from inside of Pharo. ``` Subprocess code does following: OSUnixSubprocess>>runAndWaitWithStdOutput ``` ``` self ``` ``` redirectStdout; ``` ``` redirectStderr; ``` ``` runAndWaitOnExitDo: [ :termProcess :outString :errString | ``` ``` termProcess isSuccess ``` ``` ifTrue: [ ^ outString ] ``` ``` ifFalse: [ "commands to handle ex message here" ] ] ``` ``` Now if I run, it fails: Error: Error: posix_spawn(), code: 9, description: Bad file descriptor OSSUnixSystemAccessor(Object)>>error: OSSUnixSystemAccessor>>strerror:message: OSSUnixSubprocess>>internalRun [ self internalRun ] in OSSUnixSubprocess>>run in Block: [ self internalRun ] BlockClosure>>ensure: OSSUnixSubprocess>>run OSSUnixSubprocess>>runAndWaitOnExitDo: OSSUnixSubprocess>>runAndWaitWithStdOutput ... .. . PhLImageProcessListCliCommand(PhLCliCommand)>>executeOSShellCommand So it seems that OSUnixSubprocess uses some file that remains opened probably in OS? Command that is passed to OSSubprocess is generated by args: ^ Array with: 'echo' with: '-n' with: ('$(pgrep -a -f Pharo | grep ''.image'' | grep -v ''.bash''| grep -v {1})' format: {self currentVMPid asString}) ```

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Pharo GSoC 2022 call for projects
by Sebastian Jordan Montano Feb. 8, 2022

Feb. 8, 2022

Hello to all, We, as Pharo organization, are appliying to the Google Summer of Code (GSoC) 2022 version. More info in: https://summerofcode.withgoogle.com/ >From GSoC Page: "Google Summer of Code is a global, online program focused on bringing new contributors into open source software development. GSoC Contributors work with an open source organization on a 12+ week programming project under the guidance of mentors." Now we are preparing to postulate. We would like to have the most projects as possible. Like that, we will contribute to Pharo and to Open Source in general. If you have any project and you are willing to be a mentor please send us your proposal! We would be happy to work with you. Yours sincerely, Sebastian Jordan GSoC Program Organizer from Pharo Consortium

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[ANN] Announcing the Winner of the 2022 JRMPC Competition
by horrido.hobbies＠gmail.com Feb. 7, 2022

Feb. 7, 2022

I am pleased to announce the winner of this year's JRMPC competition. The judges reviewed all the submissions and came to the extraordinary decision that onlyÂ **Ana DuCristea**Â of John G. Diefenbaker High School in Calgary, AB was worthy of an award. Her work was outstanding and constituted enormous dedication and enthusiasm for Smalltalk. Unfortunately, none of the other contestants rose to the occasion and there will be no Second or Third Prizes. Therefore, it is my decision that Ana DuCristea will receive the full prize fund of $2,500. My most heart-felt congratulations to Ana. Well done!

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First Call for Papers: 15th ACM SIGPLAN International Conference on Software Language Engineering (SLE 2022)
by Andrei Chis Feb. 7, 2022

Feb. 7, 2022

------------------------------------------------------------------------ 15th ACM SIGPLAN International Conference on Software Language Engineering (SLE 2022) December 5-10, 2022 Auckland, New Zealand https://conf.researchr.org/home/sle-2022 http://www.sleconf.org/2022 Follow us on twitter: https://twitter.com/sleconf ------------------------------------------------------------------------ We are pleased to invite you to submit papers to the 15th ACM SIGPLAN International Conference on Software Language Engineering (SLE 2022), held in conjunction with SPLASH, GPCE and SAS 2022. Based on the future developments the conference will be hosted in Auckland, New Zealand on December 5-10, 2022. --------------------------- Topics of Interest --------------------------- SLE covers software language engineering rather than engineering a specific software language. Topics of interest include, but are not limited to: - Software Language Design and Implementation - Approaches to and methods for language design - Static semantics (e.g. design rules, well-formedness constraints) - Techniques for specifying behavioral / executable semantics - Generative approaches (incl. code synthesis, compilation) - Meta-languages, meta-tools, language workbenches - Software Language Validation - Verification and formal methods for languages - Testing techniques for languages - Simulation techniques for languages - Software Language Integration and Composition - Coordination of heterogeneous languages and tools - Mappings between languages (incl. transformation languages) - Traceability between languages - Deployment of languages to different platforms - Software Language Maintenance - Software language reuse - Language evolution - Language families and variability, language and software product lines - Domain-specific approaches for any aspects of SLE (design, implementation, validation, maintenance) - Empirical evaluation and experience reports of language engineering tools - User studies evaluating usability - Performance benchmarks - Industrial applications - "Synergies between Language Engineering and emerging/promising research areas" - AI and ML language engineering (e.g., ML compiler testing, code classification) Quantum language engineering (e.g., language design for quantum machines) - Language engineering for physical systems (e.g., CPS, IoT, digital twins) - Socio-technical systems and language engineering (e.g., language evolution to adapt to social requirements) - Etc. --------------------------- Types of Submissions --------------------------- SLE accepts the following types of papers: - **Research papers**: These are "traditional" papers detailing research contributions to SLE. Papers may range from 6 to 12 pages in length, and may optionally include 2 further pages of bibliography/appendices. Papers will be reviewed with an understanding that some results do not need 12 full pages and may be fully described in fewer pages. - **New ideas / vision papers**: These are papers that may describe new, unconventional software language engineering research positions or approaches that depart from standard practice. They can describe well-defined research ideas that are at an early stage of investigation. They could also provide new evidence to challenge common wisdom, present new unifying theories about existing SLE research that provides novel insight or that can lead to the development of new technologies or approaches, or apply SLE technology to radically new application areas. New ideas / vision papers must not exceed 5 pages, and may optionally include 1 further page of bibliography / appendices. - **SLE Body of Knowledge**: The SLE Body of Knowledge (SLEBoK) is a community-wide effort to provide a unique and comprehensive description of the concepts, best practices, tools and methods developed by the SLE community. To this respect, the SLE conference will accept surveys, essays, open challenges, empirical observations and case study papers on the SLE topics. These can focus on but they are not limited to methods, techniques, best practices and teaching approaches. Papers in this category can have up to 20 pages, including bibliography/appendices. - **Tool papers**: These are papers which focus on the tooling aspects which are often forgotten or neglected in research papers. A good tool paper focuses on practical insights that are likely to be useful to other implementers or users in the future. Any of the SLE topics of interest are appropriate areas for tool demonstrations. Submissions must not exceed 5 pages and may optionally include 1 further page of bibliography / appendices. They may optionally come with an appendix with a demo outline / screenshots and/or a short video/screencast illustrating the tool. **Workshops**: Workshops will be organized by SPLASH. Please inform us and contact the SPLASH organizers if you would like to organize a workshop of interest to the SLE audience. Information on how to submit workshops can be found at the SPLASH 2022 Website. --------------------------- Two submission rounds --------------------------- For the first time, SLE is introducing a two-phase submission and review process. This will give authors submitting to the first round an extra opportunity to improve their work (if needed) based on the comments and feedback by the reviewers. Furthermore, this will increase the quality of SLE accepted papers. Manuscripts can be submitted to any of the two submission rounds. Decisions on the papers submitted to the **first round** will be: accept, reject or re-submit revised version. While rejected papers must not, revised versions may be submitted to the second round, with an accompanying response letter to the reviewers stating the changes made and how the authors addressed the reviewersâ criticisms. Re-submissions will be reviewed by the same reviewers. Decisions on fresh papers submitted to the **second round** will be: accept or reject. The authors of those papers that are likely to be rejected but have at least one reviewer who is championing it will have the chance to respond to the reviewers before the final decision is made. --------------------------- Important Dates --------------------------- All dates are Anywhere on Earth. * 1st round submissions * Abstract submissions: April 6, 2022 * Paper submissions: April 13, 2022 * Notification: May 13, 2022 * 2nd round submissions * Abstract submissions: July 8, 2022 (tentative) * Paper submissions: July 15, 2022 (tentative) * Review notification: September 7, 2022 (tentative) * Author response period: September 12, 2022 (tentative) * Notification: September 19, 2022 (tentative) * Artifact submissions: September 26, 2022 (tentative) * Artifact kick-the-tires Author response: October 10, 2022 (tentative) * Artifact notification: October 24, 2022 (tentative) * Camera-ready (for both rounds): November 4, 2022 (tentative) * Conference: December 5-10, 2022 (TENTATIVE) **COVID-19 Disclaimer** Due to the uncertainties related to the current COVID-19 pandemic, the second round submission deadlines, the artifact evaluation deadlines, the camera-ready deadline and the conference dates are still *preliminary* and will be closed in the next few weeks. --------------------------- Format --------------------------- Submissions have to use the ACM SIGPLAN Conference Format "acmart"(http://sigplan.org/Resources/Author/#acmart-format) please make sure that you always use the latest ACM SIGPLAN acmart LaTeX template(https://www.acm.org/binaries/content/assets/publications/consolida…, and that the document class definition is `\documentclass[sigplan,anonymous,review]{acmart}`. Do not make any changes to this format! Ensure that your submission is legible when printed on a black and white printer. In particular, please check that colors remain distinct and font sizes in figures and tables are legible. To increase fairness in reviewing, a double-blind review process has become standard across SIGPLAN conferences. In this line, SLE will follow the double-blind process. Author names and institutions should be omitted from submitted papers, and references to the authorsâ own related work should be in the third person. No other changes are necessary, and authors will not be penalized if reviewers are able to infer their identities in implicit ways. All submissions must be in PDF format. The submission website is: https://sle22.hotcrp.com --------------------------- Concurrent Submissions --------------------------- Papers must describe unpublished work that is not currently submitted for publication elsewhere as described by SIGPLANâs Republication Policy (http://www.sigplan.org/Resources/Policies/Republication) Submitters should also be aware of ACMâs Policy and Procedures on Plagiarism (http://www.acm.org/publications/policies/plagiarism_policy) Submissions that violate these policies will be desk-rejected. --------------------------- Policy on Human Participant and Subject Research --------------------------- Authors conducting research involving human participants and subjects must ensure that their research comply with their local governing laws and regulations and the ACMâs general principles as stated in the ACMâs Publications Policy on Research Involving Human Participants and Subjects (https://www.acm.org/publications/policies/research-involving-human-particip…) Submissions that violate this policy will be rejected. --------------------------- Reviewing Process --------------------------- All submitted papers will be reviewed by at least three members of the program committee. Research papers and tool papers will be evaluated concerning novelty, correctness, significance, readability, and alignment with the conference call. New ideas/vision papers will be evaluated primarily concerning novelty, significance, readability, and alignment with the conference call. SLEBoK papers will be reviewed on their significance, readability, topicality and capacity of presenting/evaluating/demonstrating a piece of BoK about SLE. For fairness reasons, all submitted papers must conform to the above instructions. Submissions that violate these instructions may be rejected without review, at the discretion of the PC chairs. After each review round, authors will get a chance to respond before a final decision is made. --------------------------- Artifact Evaluation --------------------------- For the seventh year, SLE will use an evaluation process for assessing the quality of the artifacts on which papers are based to foster the culture of experimental reproducibility. Authors of accepted research papers are invited to submit artifacts. For more information, please have a look at the Artifact Evaluation (http://www.sleconf.org/2022/ArtifactEvaluation.html) page. --------------------------- Special Issue --------------------------- A special issue on the conference topic in a high-impact journal is under negotiation. --------------------------- Awards --------------------------- - **Distinguished paper**: Award for most notable paper, as determined by the PC chairs based on the recommendations of the programme committee. - **Distinguished artifact**: Award for the artifact most significantly exceeding expectations, as determined by the AEC chairs based on the recommendations of the artifact evaluation committee. --------------------------- Publication --------------------------- All accepted papers will be published in the ACM Digital Library. **AUTHORS TAKE NOTE**: The official publication date is the date the proceedings are made available in the ACM Digital Library. This date may be up to two weeks prior to the first day of the conference. The official publication date affects the deadline for any patent filings related to published work. --------------------------- SLE and Doctoral Students --------------------------- SLE encourages students to submit to the SPLASH doctoral symposium. Authors of accepted papers will have the chance to present their work to the SLE audience, too. --------------------------- Organisation --------------------------- Chairs: * General chair: Bernd Fischer, Stellenbosch University, South Africa * PC co-chair: Lola BurgueÃ±o, Open University of Catalonia, Spain * PC co-chair: Walter Cazzola, UniversitÃ degli Studi di Milano, Italy * Artefact Evaluation co-chair: Thomas KÃ¼hn, Karlsruhe Institute of Technology, Germany * Artefact Evaluation co-chair: Juliana A. Pereira, Pontifical Catholic University of Rio de Janeiro, Brazil Program committee: Shaukat Ali, Simula Research Laboratory, Norway Arvid Butting, Aachen University, Germany Marsha Chechik, University of Toronto, Canada Shigeru Chiba, University of Tokyo, Japan BenoÃ®t Combemale, University of Rennes, France Zhenjiang Hu, Peking University, China JÃ¶rg Kienzle, McGill University, Canada Dimitris Kolovos, University of York, UK Thomas KÃ¼hn, Karlsruhe Institute of Technology, Germany Juan de Lara, Universidad AutÃ³noma de Madrid, Spain Stefan Marr, University of Kent, UK Marjan Mernik, University of Maribor, Slovenia Natsuko Noda, Shibaura Institute of Technology, Japan Juliana A. Pereira, Pontifical Catholic University of Rio de Janeiro, Brazil Elizabeth Scott, University of London, UK Marco Servetto, Victoria University of Wellington, New Zealand Emma SÃ¶derberg, Lund University, Sweden Walid Taha, Halmstad University , Sweden Marco Tullio Valente, Universidade Federal de Minas Gerais, Brazil Erik Van Wyk, University of Minnesota , USA Alfonso de la Vega, University of Cantabria, Spain Ran Wei, Dalian University of Technology, China Andreas Wortmann, Stuttgart University, Germany Vadim Zaytsev, University of Twente, Netherlands Steffen Zschaler, Kingâs College London, UK --------------------------- Contact --------------------------- For additional information, clarification, or answers to questions, please contact the Programme Chairs (Lola BurgueÃ±o and Walter Cazzola) at sle22-chairs _at_ di.unimi.it.

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Re: aio event forwarding not supported
by Davide Varvello Feb. 7, 2022

Feb. 7, 2022

Hi Stephane > On Saturday, February 5, 2022, 10:58:37 AM GMT+1, stephane.ducasse(a)free.fr <stephane.ducasse(a)free.fr> wrote: >Hi david > >Can you tell us on which version of os-x you are? I'm on Big Sur, see my original message:Â https://www.mail-archive.com/pharo-users@lists.pharo.org/msg40530.html And the bug I openedÂ https://pharo.fogbugz.com/f/cases/22925/aio-event-forwarding-not-supportedÂ > We faced many glitches with monterrey. For example sometimes at startup my images do not get events :( > Pablo is going on vacation for two weeks and esteban and me too :) > So we will be slower to react.Â > Now you face what we face, the world keeps changing under our feets and > this brings us many things that we did not want/plan to work on. > This is why VMs are nice for the users they abstract the shit underneath but nevertheless it exists. > S I know it's a tough job, I'm trying to implement a workaround, thanks for your work. Davide

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Re: aio event forwarding not supported
by David T. Lewis Feb. 4, 2022

Feb. 4, 2022

Hi Davide, Actually the warning has been removed in newer versions of OSProcess. I do not have time to do an update for Pharo now, but in the mean time you can apply this change in your image to remove the notifier: AioEventHandler>>initializeForExceptions: exceptionEventFlag readEvents: readEventFlag writeEvents: writeEventFlag semaphore := Semaphore new. semaIndex := Smalltalk registerExternalObject: semaphore. (AioPluginPresent = true) ifTrue: [ ([self aioEnable: self descriptor forSemaphore: self semaIndex externalObject: true] on: Warning do: [:e | self close. "unregister the semaphore" OSProcess trace: e messageText asString. nil]) ifNotNil: [handlerProc := self handleExceptions: exceptionEventFlag readEvents: readEventFlag writeEvents: writeEventFlag]] HTH, Dave On Fri, Feb 04, 2022 at 03:05:57PM +0000, Davide Varvello wrote: > Hi David,That's weird because if the AioPlugin is not present in my VM,??PipeableOSProcess shouldn't have worked till this morning... when I upgraded my mac :-) > The warning is not skippable, it stops me at:??MessageNotUnderstood: IRJump>> #nextBytecodeOffsetAfterJumpCheersDavide > > On Friday, February 4, 2022, 03:54:59 PM GMT+1, David T. Lewis <lewis(a)mail.msen.com> wrote: > > On Fri, Feb 04, 2022 at 01:46:46PM +0000, Davide Varvello via Pharo-users wrote: > > Hi guys, > > Suddenly evaluating a simple: (PipeableOSProcess command: 'ps') output, or any other PipeableOSProcess command, Pharo gives me: "aio event forwarding not supported". > > I guess it is something related to the latest update of the OS, specifically Big Sur 11.6.3 (20G415) https://support.apple.com/en-us/HT213055I'm on a Mac, of course, Pharo 8.0.0, Build information: Pharo-8.0.0+build.1128.sha.9f6475d88dda7d83acdeeda794df35d304cf620d (64 Bit) > > Can you help me, please?CheersDavide > > Hi Davide, > > The warning message indicates that the AioPlugin is not present > in your VM. I do not know the reason for that, although your > PipeableOSProcess should still work if you proceed through the > warning. > > Dave > >

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aio event forwarding not supported
by Davide Varvello Feb. 4, 2022

Feb. 4, 2022

Hi guys, Suddenly evaluating a simple: (PipeableOSProcess command: 'ps') output, or any other PipeableOSProcess command, Pharo gives me: "aio event forwarding not supported". I guess it is something related to the latest update of the OS, specifically Big Sur 11.6.3 (20G415) https://support.apple.com/en-us/HT213055I'm on a Mac, of course, Pharo 8.0.0, Build information: Pharo-8.0.0+build.1128.sha.9f6475d88dda7d83acdeeda794df35d304cf620d (64 Bit) Can you help me, please?CheersDavide

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