April 2021 - Pharo-users - lists.pharo.org

[ANN] Merlin to GitHub
by HernÃ¡n Morales Durand April 21, 2021

April 21, 2021

Hi I just ported Merlin to Github with the GitMigrator. Please let me know if you want me to transfer the repository since this is mostly work of the Moose Team. https://github.com/hernanmd/merlin Cheers, HernÃ¡n

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Help Needed: Looking for projects to use in a study of transforming deprecations
by Oleksandr Zaitsev April 20, 2021

April 20, 2021

Hello, I need your help to recommend some projects that I can use in my study of transforming deprecations. As many of you know, Pharo supports a very powerful concept of "transforming" deprecations. You can deprecate a method, providing a transformation rule. Then when a client application calls the deprecated method, the call-site will be automatically rewritten to use the new API. Here is an example of a transforming deprecation: Collection >> includesAllOf: values self deprecated: âUse #includesAll: insteadâ transformWith: â`@rec includesAllOf: `@argâ -> â`@rec includesAll: `@argâ. ^ self includesAll: values You can read more about transforming deprecations in my blog post: https://blog.oleks.fr/deprewriter I am working on a tool that can analyse the commit history of a project and recommend deprecations and transformation rules that can be inserted before the release. It works like this: 1. Collect all commits between two releases of a project 2. Mine those commits to identify method call replacements (deletions and additions) that happen frequently 3. Infer the mapping between the methods of the old and new API 4. Recommend deprecations and generate transformation rules I have validated my approach on Pharo, Moose, Pillar, Famix, and DataFrame projects. Now I am looking for other projects that could benefit from recommended deprecations and could be used in my study. *Required:* - open source project with accessible commit history (e.g. public git repository) - written in Pharo (although if you know projects in other languages that could be interesting for my study, please let me know about them as well) *Prefered:* - ongoing development - multiple releases - has users (other projects that depend on it) If you have some projects in mind, please let me know about them! And if you are interested in this study and want to learn more, don't hesitate to contact me by email. Oleksandr

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Postgres P3 Driver in seaside/web apps - strategy for "prepare:"
by Sanjay Minni April 19, 2021

April 19, 2021

Hi using the P3 Postgres driver what is the optimised way of using the following in a seaside/web application statement := client prepare: ... statement execute: statement close. Sven readme on the drivers page "prepared statements ... need to be closed, prepared statement exist ... single session / connection ..." Typically in a desktop app I would fire the "prepare" statements(s) once when open the particular UI / window (say typically 2 or 3 statements in a UI) and then "close" when I exit How does this work in a multi-tabbed browser app lets say I open a tab with a particular UI and fire the "prepare" statement now what if the tab idles for too long - and then i press send/save. The program would have just fired the "execute ..." assuming the prepare is active. would the prepare / session have been automatically closed ? - when should i typically fire the prepare statement - how should i test if the session / prepare is still active or needs to be refired - how are orphan prepare statements disposed off ny the database / program thanks for pointers Sanjay ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[ANN] Willow-Bootstrap v13.1.1 [v13.1.1] released!
by Buenos Aires Smalltalk April 19, 2021

April 19, 2021

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[ANN] Willow v14.2.1 [v14.2.1] released!
by Buenos Aires Smalltalk April 19, 2021

April 19, 2021

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[ANN] Boardwalk v6.1.1 [v6.1.1] released!
by Buenos Aires Smalltalk April 19, 2021

April 19, 2021

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Whats the easiest/cheapest way to run a Pharo web app in 2021?
by Tim Mackinnon April 19, 2021

April 19, 2021

Hi everyone - its been a few year since I last hosted a little Pharo web app - and the last time I did, Sven pointed me to DigitalOcean and creating a tiny instance and configuring an Ubuntu server and then copying a pharo image on to that. It recall it wasnât too bad, albeit a bit fiddlyâ¦ Now several years later - I canât recall the exact steps, and vaguely recall there was something about 32bit vs 64bit setup etc - but am wondering if things have advanced a bit and whether its much simpler these days? Iâve seen references to Docker images for Pharo, and am wondering if now that is a prime time way to easily get a small demo application up and running with minimal fuss. Does anyone have advice - or something to point me to? Ideally I want to hook something up in Gitlab CI do deploy to this thing automatically (this is where I got to a few years ago - but in picking things back up I am hoping this has all got much simpler). Tim

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testing mailing list distribution
by Jonathan van Alteren April 19, 2021

April 19, 2021

My apologies, but my messages weren't received/distributed by the mailing list, so this is a test message. Please ignore. Kind regards, Jonathan van Alteren Founding Member | Object Guild B.V. Software that works âwithâ you jonathan(a)objectguild.com

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Fwd: Re: Re: Whats the easiest/cheapest way to run a Pharo web app in 2021?
by Jonathan van Alteren April 17, 2021

April 17, 2021

Hi Tim, all, Weirdly enough, it seems my earlier reply to this thread hasn't been properly received/distributed by the list. Marcus was very kind to help me solve this, so you should receive this message now. Anyway... see my original message below. Hope it's still useful. ----- Hi Tim, Didn't really notice this thread until now. I understand you're looking into deployment using Docker. However, to provide some perspective, we're happily running Pharo in production on a (self-managed) VPS on Hetzner Cloud (which uses 100% green energy!). We use our own adaptation of Pharo server tools based on Sven's original work:Â https://github.com/objectguild/pharo-server-tools. We started with running Pharo 7.0 and have since upgraded to Pharo 8.0. Some experience with Linux command line is certainly welcome, but it should be fairly easy to get this going. Mind you, the README is (unfortunately) _not_ up to date. Regarding Docker, I don't have much experience myself. I've only used it a couple of times to troubleshoot smalltalkCI issues, never for running a Pharo server application. Hope this is of some use to you or others. Good luck and have fun! ----- Best, Jonathan van Alteren Founding Member | Object Guild B.V. Software that works âwithâ you jonathan(a)objectguild.com ---------- Forwarded message ---------- From: Jonathan van Alteren <jvalteren(a)objectguild.com> Date: 8 Apr 2021, 13:19 +0200 To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> Subject: Re: [Pharo-users] Re: Whats the easiest/cheapest way to run a Pharo web app in 2021? > Hi Tim, > > Didn't really notice this thread until now. I understand you're looking into deployment using Docker. However, to provide some perspective, we're happily running Pharo in production on a (self-managed) VPS on Hetzner Cloud (which uses 100% green energy!). > > We use our own adaptation of Pharo server tools based on Sven's original work:Â https://github.com/objectguild/pharo-server-tools. We started with running Pharo 7.0 and have since upgraded to Pharo 8.0. Some experience with Linux command line is certainly welcome, but it should be fairly easy to get this going. Mind you, the README is (unfortunately) _not_ up to date. > > Regarding Docker, I don't have much experience myself. I've only used it a couple of times to troubleshoot smalltalkCI issues, never for running a Pharo server application. > > Hope this is of some use to you or others. Good luck and have fun! > > > Kind regards, > > Jonathan van Alteren > > Founding Member | Object Guild B.V. > Software that works âwithâ you > > jonathan(a)objectguild.com > > On 8 Apr 2021, 12:58 +0200, Tim Mackinnon <tim(a)testit.works>, wrote: > > Head slap.... I completely forgot I could do that, thanks for reminding Pierce (its almost better as well, as you can build your image, save it, then run tests on it, and then if it passes all your stages you can included the saved version in your docker build... which sits better with me as it also means that log artifacts etc can be more easily examined for failures (and your not trying to console into a docker image to figure it out). As a nice side effect - if you are doing this in something like Gitlab - you have your project source already there and so you can avoid an extra checkout step, so its a little bit faster. > > > > Pierce - who/where are you rnning your Docker image? Do you use a particular service (or are you running your own?) > > > > Tim > > > > > > > > On Thu, 8 Apr 2021, at 4:29 AM, Pierce Ng wrote: > > > On Wed, Apr 07, 2021 at 02:21:14AM +0100, Tim Mackinnon wrote: > > > > I also feel its quite important to call out that the "eval 'Metacello > > > > new..." command referenced in the DockerFile RUN - is only going to work > > > > > > Hi, > > > > > > I build my Pharo image outside of Docker. My Dockerfile then packages the > > > built image plus whatever artefacts required into a Docker image. I am > > > using my Alpine Linux-based VM. > > > > > > GH: https://github.com/pharo-contributions/Docker-Alpine/ > > > DH: https://hub.docker.com/r/pierceng/pharovm-alpine > > > > > > Pierce > > >

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Pharo-IOT Remote Dev connection Issue
by Jupiter Jones April 17, 2021

April 17, 2021

Hi, I have a PharoThings environment which Iâm updating to version 0.3.2 and keep hitting the following DNU error when runningâ¦ remotePharo := TlpRemoteIDE connectTo: (TCPAddress ip: ip port: 40423). â¦from the Mac client to the pi server (image below). A SeamlessDefaultRequestContext does not understand #ownBytes: â¦which is correct - it does not :) Iâm guessing #materializeObject in the code just before the error, should have answered a SeamlessRequest. The git page claims itâs building successfully, and Iâve tried re-installing both the client on the Mac and the server on the pi, and get the same error each time. Is this a known error? Or am I doing something wrong? Thanks in advance for any advice. Cheers, J

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Crash after http request, see the dump file
by Davide Varvello April 16, 2021

April 16, 2021

Hi guys, I'm working on Pharo 8 on BigSur (Pharo 8.0.0 Build information: Pharo-8.0.0+build.1128.sha.9f6475d88dda7d83acdeeda794df35d304cf620d (64 Bit)) Yesterday after an http call to my zinc server the image crashed. Can you please take a look to the dump file and tell me what happened? It would be worth so much to me, thank you The file is here: https://pastebin.com/SrE6gcCv Davide -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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UK Smalltalk User Group meeting - Wednesday April 28th
by Giovanni Corriga April 15, 2021

April 15, 2021

The next meeting of the UK Smalltalk User Group will be on Wednesday, April 28th. Esteban Lorenzano will give us an update on Pharo: What's new? What is updated? What remains? This talk will present (and show working!) the Pharo 9 roadmap and principal changes made to Pharo since the release of the previous version. Esteban studied Computer Sciences at Universidad de Buenos Aires, and worked since 1994 in many object-oriented and low-level technologies in different software companies, serving in various positions from junior programmer to senior architect. In 2007 he co-founded Smallworks to offer Pharo-based agile development projects. Since 2012 he dedicated full time to developing the Pharo code and community. He works for the Pharo Consortium in Lille, France, as lead developer for Pharo and being responsible with the coordination of new releases and the implementation and maintenance of several Pharo libraries.Given the current COVID-19 restrictions, 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/cbklbryccgblc/ ) to receive the meeting details. Donât forget to bring your laptop and drinks!

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Problem with Pharo 9 - repositories missing
by david＠totallyobjects.com April 12, 2021

April 12, 2021

Hi everyone. I have a simple talk, or so I thought. I am trying to port a Mac Pharo/Seaside project to either a Windows 2012 server or to a Windows 10 laptop. I have set up my git credentials and that all works fine. However, when I install either 8.0 or 9.0 on my Windows 10 laptop it shows he following Repositories -- status Pharo Local repository missing Pharo-spec2 Local repository missing Pharo-newtools Local repository missing Iceberg Local repository missing Libgit-pharo-bindings Local repository missing tonel Local repository missing What on earth is going on here as installing Pharo on my Mac was seamless. I have to get the project onto a Windows machine as these are the only servers that I have. I really can't be this difficult, can it? How do I get out of this mess, given that that is a clean install? David Totally Objects

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Understanding how to best structure branches to contribute to a 3rd party project
by Tim Mackinnon April 5, 2021

April 5, 2021

Hi Everyone - I tried asking this on Discord, but I think it got a bit lost - and perhaps for more philosophical questions, here is better. So - Iâm wondering what is the recommended way to work with another project you want to contribute to (in my case CodeParasides). So I know I can fork it and put the fork in my baseline. But Iâm assuming contributions are best done discretely on a branch per proposal (this seems to be the Pharo way - and it makes sense for ease of understanding), but if you have a few of these contributions in play (while the maintainer is evaluating them) would you then have your own âcombinationâ branch to consolidate all those fixes until they get merged in? Iâve started to try this, but merging between branches gets a bit tricky - a few times now it seems that Iceberg shows me misleading info on what is being added/removed (it always looks like my changes are going to be removed, when if fact they get added - so its a bit of a leap of faith on this). So Iâm wondering if Iâm overcomplicating things - or whether this is the suggested way to work with another project? Tim

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Problem installing Seaside on Windows
by David Pennington April 2, 2021

April 2, 2021

Hi everyone. I have been developing a new web site using Seaside on my M1 MacBookAir and I have had no issues. To deploy it, I have to install Pharo on either a Windows 10 or a Windows Server 2012 server. Pharo has installed on both without any issues. However, I am having problems installing Seaside. I have Pharo 8.0 installed on both (64 bit version). If I try and install from the Catalog, I get the following error in the Transcript. IceGenericError: Failed to stat file 'C:/Users/david/Documents/Pharo/images/Pharo 8.0 - 64bit (stable)/pharo-local. If I try using Monticello, I get the following: Metacello new baseline:'Seaside3'; repository: 'github://SeasideSt/Seaside:master/repository'; load I got an error while cloning: There was an authentication error while trying to execute the operation: . This happens usually because you didn't provide a valid set of credentials. You may fix this problem in different ways: 1. adding your keys to ssh-agent, executing ssh-add ~/.ssh/id_rsa in your command line. 2. adding your keys in settings (open settings browser search for "Use custom SSH keys" and add your public and private keys). 3. using HTTPS instead SSH (Just use an url in the form HTTPS://etc.git) I will try to clone the HTTPS variant. Can you help please? David Totally Objects

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[ANN] Mole v3.2.0 [v3.2.0] released!
by Buenos Aires Smalltalk April 2, 2021

April 2, 2021

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Google Summer of Code: Call for Students
by Oleksandr Zaitsev April 1, 2021

April 1, 2021

Hello, The application for Google Summer of Code with Pharo is open and we are looking for students who would like to apply. On our website, you can find the description of the program structure and detailed instructions on how to apply: https://gsoc.pharo.org/call-for-students. If you are a student, don't hesitate to send us your application! If you are a professor, please share this information with your students and encourage them to apply! GSoC is a wonderful opportunity to improve their programming skills and get immersed into the world of open-source. With best regards, Oleks, Gordana, Serge, and Juan Pablo GSoC Organizers from Pharo Consortium

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Roassal3 Popups
by Evan Donahue April 1, 2021

April 1, 2021

Hello, Just returning to Pharo after 1000 years and have discovered that Roassal has upgraded to Roassal3. Trying to update my inspector integrations and can't seem to figure out how to get popups working. How can I get popups for the y values in a scatter plot such as the following: RSChart new addPlot: (RSScatterPlot new y: #(1 2 3)). Thanks, Evan

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How to get top level menu item shortcuts to work?
by Tim Mackinnon April 1, 2021

April 1, 2021

Hi - I tried asking this on Discord, but it got lost in the day to day stuff - so trying here. I am a bit confused how Keyboard shortcuts work in P8 for World menus. I have a method with the <worldMenu> pragma, and I get aBuilder, and I create a top level menu item. Then to add a child, it seems that I just create a new #item: and set its #parent: to the new id I've created (all good), and then I set #keyText: 'r, o' and while it shows a menu item with CMD-RO in its text, the keystroke doesn't seem to work. I've tried different options even, 'o, x' but none of them trigger - so I must be missing something? Anyone know? My code looks like this (menuId = #Paradise - the top level menu item I have created) | menuId | (aBuilder item: (menuId := #Paradise)) order: 4.0; target: self; help: 'Tools to support Code Paradise projects'. (aBuilder item: #'Reload...') parent: menuId; help: 'Clear the session for a web application, and reload its''s page'; order: 15; keyText: 'r, r'; icon: (self iconNamed: #smallUpdate); action: [ self resetSession ].

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