May 2020 - Pharo-users - lists.pharo.org

Re: [Pharo-users] FFI and absolute path to dll

by Ben Coman

On Sun, 17 May 2020 at 20:54, ASAM <vmax28575(a)gmail.com> wrote: > Thanks for the tips. It really helped me a lot. > The dll is now loaded (I chose the 64-bit version of the dll). > > I am currently working on value mashalling and I want to create an ENUM > class subclass from FFIEnumeration. > > Inside http://books.pharo.org/booklet-uffi/pdf/2020-02-12-uFFI-V1.0.1 i > read chapter 4.4 Enumerations. > I tried the example. > For me, however, only new class variables are created after > "ExampleEnumeration initialize". > > Is that okay? or a bug? > The class-side #initialization method only gets called when the class is created e.g. when first loaded into a fresh image. It doesn't get re-run just because you edit the method, because the class is already initialized. By analogy, evaluating ``x := MyObject new`` invokes the instance-side initialize when the object is created. Subsequently editing MyObject >> #initialize wont change any values in the existing object in `x`. Remember "classes are objects too". cheers -ben

May 18, 2020

Re: [Pharo-users] MetaLinks for Dynamic Contracts

by Marcus Denker

> On 3 May 2020, at 23:18, Evan Donahue <emdonahu(a)gmail.com> wrote: > > Hello, > > I am returning to some work in Pharo after about ~2.5 years and reminding myself of what I was working on before I got sidetracked. It appears > > I had mostly finished for release a dynamic contracts library for run time type checking based on Racket's contract library.[1] However, it relied on some hackery to interact well with the TestCoverage class, since both the contract and the TestCoverage wanted to replace the method during the run of a test. However, since it seems in Pharo 8 the TestCoverage class is no longer present, this seems like a good time to re-evaluate the project before I go in to see what needs to be patched up. I therefore have three questions: > > 1) Are there now any existing libraries for dynamic contracts that I should use instead of patching my old library? > > 2) Is MetaLinks the preferred way to intercept messages, and if so can someone point me to the repo (I can't seem to find it on Github)? > The MetaLinks are in the release, no need to load anything. > 3) If 2, does MetaLinks play well with whatever is the current TestCoverage alternative that I assume still does some form of message interception, e.g. will the test coverage function still work properly on a MetaLink'ed message, or will that require further hackery (I discovered MetaLinks after the first version, so I used the more basic message replacement apis)? > The test Coverage was re-implemented with MataLink, see the method #collectCoverageFor: in TestRunner. This means that it should compose nicely with any other #before or #after MetaLink, without any need to take special care. Marcus

May 18, 2020

[ANN] Willow-Bootstrap v12.1.0 [v12.1.0] released!

by Buenos Aires Smalltalk

May 17, 2020

Re: [Pharo-users] running Pharo8 in Digitalocean

by Sven Van Caekenberghe

Hi Sanjay, When you do a metacello configuration or baseline install with the command line tools, the image is saved automatically at the end (if the load is successful). My current approach is described here https://github.com/svenvc/minimal-pharo-server-tools which is a newer version of https://github.com/svenvc/pharo-server-tools Much of this goes beyond Pharo and requires some Unix/Linux knowledge, but it is all standard stuff. Sven > On 17 May 2020, at 18:39, Sanjay Minni <sm(a)planage.com> wrote: > > @Sven, > > (While going thru the book ".../DeployForProduction...") > > seems section 1 & 2 would have to be updated ... > > In section 3 Build Your Image ... > what is the script for installing dependencies from github and having a > Baseline (instead of Configuration) as practically all packages have moved > to Github > > and > In this method it seems the image is never saved / persistent. In the event > of a stoppage it begins ground up. Is that correct ? > > > Sven Van Caekenberghe-2 wrote >>> On 16 May 2020, at 11:15, Sanjay Minni < > >> sm@ > >> > wrote: >>> >>> Can I run this way the same image which otherwise runs fine thru the >>> graphical environment >>> >>> When I run that image in graphical environment it immediately starts as >>> the >>> application server. So cwould it work from the command line tools without >>> changes. >>> >>> ...$ ... >>> ...$ nohup ./pharo >> <myPharo.imageWithCompletePath> >> In principle, yes. >> >> But I recommend to not have running servers/services in the saved image, >> but instead to save (better auto build) a new clean image with nothing >> open (close all windows), nothing running, just your code. And then use a >> startup script. >> >> Either use a run.st file which does all the work, or a class side 'MyStart >> startForProduction'. >> >> Please read the book chapter. >> >>> Sven Van Caekenberghe-2 wrote >>>>> On 16 May 2020, at 09:22, Sven Van Caekenberghe < >>> >>>> sven@ >>> >>>> > wrote: >>>>> >>>>> Hi, >>>>> >>>>> Everybody is free to do whatever they want, of course. >>>>> >>>>> My advice would be to not use graphical tools to deploy server >>>>> applications (unless as add ons afterwards, like a dashboard or >>>>> management app). >>>>> >>>>> Use Linux (Ubuntu is the safest choice). >>>>> >>>>> Stick with headless (no gui) command line tools. >>>>> >>>>> Pharo is very good at this. >>>> >>>> Also use 64-bit (that is 64-bit Pharo on 64-bit Linux), it will make >>>> your >>>> life much easier. >>>> >>>> Here is a short example: >>>> >>>> stfx@audio359:~$ mkdir pharo8 >>>> >>>> stfx@audio359:~$ cd !$ >>>> cd pharo8 >>>> >>>> stfx@audio359:~/pharo8$ curl get.pharo.org/64/80+vm | bash >>>> % Total % Received % Xferd Average Speed Time Time Time >>>> Current >>>> Dload Upload Total Spent Left >>>> Speed >>>> 100 3054 100 3054 0 0 67866 0 --:--:-- --:--:-- --:--:-- >>>> 69409 >>>> Downloading the latest 80 Image: >>>> http://files.pharo.org/get-files/80/pharo64.zip >>>> Pharo.image >>>> Downloading the latest pharoVM: >>>> http://files.pharo.org/get-files/80/pharo64-linux-stable.zip >>>> pharo-vm/pharo >>>> Creating starter scripts pharo and pharo-ui >>>> >>>> stfx@audio359:~/pharo8$ nohup ./pharo Pharo.image eval --no-quit >>>> 'ZnServer >>>> startOn: 9090' & >>>> [1] 84125 >>>> nohup: ignoring input and appending output to 'nohup.out' >>>> >>>> stfx@audio359:~/pharo8$ curl http://localhost:9090/random >>>> CF4173824EF6E0D9F336E5464A5FACB8ABEFFD1A6EE7A5F9F6631186F619606 >>>> >>>> stfx@audio359:~/pharo8$ jobs >>>> [1]+ Running nohup ./pharo Pharo.image eval --no-quit >>>> 'ZnServer startOn: 9090' & >>>> >>>> stfx@audio359:~/pharo8$ kill %1 >>>> [1]+ Terminated nohup ./pharo Pharo.image eval --no-quit >>>> 'ZnServer startOn: 9090' >>>> >>>> BTW, nohup is one way to keep something running after you log out >>>> (systemctl services being the pro/real way) >>>> >>>>> The following book chapter explain things reasonably well: >>>>> >>>>> https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessf… >>>>> >>>>> Nowadays, you would use Baselines and git though. >>>>> >>>>> I can give you more info if you want. Feel free to ask questions. >>>>> >>>>> Sven >>>>> >>>>>> On 16 May 2020, at 07:00, Sanjay Minni < >>> >>>> sm@ >>> >>>> > wrote: >>>>>> >>>>>> Hi >>>>>> >>>>>> Eventually in a Digitalocean Ubuntu droplet, I connected from Windows >>>>>> 10 >>>>>> to >>>>>> a Ubuntu Graphical desktop, installed PharoLauncher and couple of >>>>>> images >>>>>> and >>>>>> got seaside up, installed Mongo DB and a Pharo App. pretty smooth and >>>>>> can >>>>>> share how to step by step if anybody is interested. >>>>>> >>>>>> (note: no additional software is required on Windows 10 except chrome >>>>>> - >>>>>> as >>>>>> SSH, Remote Desktop is inbuilt, Chrome only for its VNC app) >>>>>> >>>>>> Question: what is the best way to run and leave the Pharo App as a >>>>>> seaside >>>>>> server running. >>>>>> Currently I am running thru the X Desktop and if I Disconnect / logout >>>>>> from >>>>>> the remote desktop session then the pharo app may go down. also is >>>>>> that >>>>>> the >>>>>> most stable and resource optimised way >>>>>> >>>>>> further: is Apache recommended >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> ----- >>>>>> cheers, >>>>>> Sanjay >>>>>> -- >>>>>> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >>>>>> >>>>> >>> >>> >>> >>> >>> >>> ----- >>> cheers, >>> Sanjay >>> -- >>> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > > > > > ----- > cheers, > Sanjay > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 17, 2020

Re: [Pharo-users] running Pharo8 in Digitalocean

by Sanjay Minni

@Sven, (While going thru the book ".../DeployForProduction...") seems section 1 & 2 would have to be updated ... In section 3 Build Your Image ... what is the script for installing dependencies from github and having a Baseline (instead of Configuration) as practically all packages have moved to Github and In this method it seems the image is never saved / persistent. In the event of a stoppage it begins ground up. Is that correct ? Sven Van Caekenberghe-2 wrote >> On 16 May 2020, at 11:15, Sanjay Minni < > sm@ > > wrote: >> >> Can I run this way the same image which otherwise runs fine thru the >> graphical environment >> >> When I run that image in graphical environment it immediately starts as >> the >> application server. So cwould it work from the command line tools without >> changes. >> >> ...$ ... >> ...$ nohup ./pharo > <myPharo.imageWithCompletePath> > In principle, yes. > > But I recommend to not have running servers/services in the saved image, > but instead to save (better auto build) a new clean image with nothing > open (close all windows), nothing running, just your code. And then use a > startup script. > > Either use a run.st file which does all the work, or a class side 'MyStart > startForProduction'. > > Please read the book chapter. > >> Sven Van Caekenberghe-2 wrote >>>> On 16 May 2020, at 09:22, Sven Van Caekenberghe < >> >>> sven@ >> >>> > wrote: >>>> >>>> Hi, >>>> >>>> Everybody is free to do whatever they want, of course. >>>> >>>> My advice would be to not use graphical tools to deploy server >>>> applications (unless as add ons afterwards, like a dashboard or >>>> management app). >>>> >>>> Use Linux (Ubuntu is the safest choice). >>>> >>>> Stick with headless (no gui) command line tools. >>>> >>>> Pharo is very good at this. >>> >>> Also use 64-bit (that is 64-bit Pharo on 64-bit Linux), it will make >>> your >>> life much easier. >>> >>> Here is a short example: >>> >>> stfx@audio359:~$ mkdir pharo8 >>> >>> stfx@audio359:~$ cd !$ >>> cd pharo8 >>> >>> stfx@audio359:~/pharo8$ curl get.pharo.org/64/80+vm | bash >>> % Total % Received % Xferd Average Speed Time Time Time >>> Current >>> Dload Upload Total Spent Left >>> Speed >>> 100 3054 100 3054 0 0 67866 0 --:--:-- --:--:-- --:--:-- >>> 69409 >>> Downloading the latest 80 Image: >>> http://files.pharo.org/get-files/80/pharo64.zip >>> Pharo.image >>> Downloading the latest pharoVM: >>> http://files.pharo.org/get-files/80/pharo64-linux-stable.zip >>> pharo-vm/pharo >>> Creating starter scripts pharo and pharo-ui >>> >>> stfx@audio359:~/pharo8$ nohup ./pharo Pharo.image eval --no-quit >>> 'ZnServer >>> startOn: 9090' & >>> [1] 84125 >>> nohup: ignoring input and appending output to 'nohup.out' >>> >>> stfx@audio359:~/pharo8$ curl http://localhost:9090/random >>> CF4173824EF6E0D9F336E5464A5FACB8ABEFFD1A6EE7A5F9F6631186F619606 >>> >>> stfx@audio359:~/pharo8$ jobs >>> [1]+ Running nohup ./pharo Pharo.image eval --no-quit >>> 'ZnServer startOn: 9090' & >>> >>> stfx@audio359:~/pharo8$ kill %1 >>> [1]+ Terminated nohup ./pharo Pharo.image eval --no-quit >>> 'ZnServer startOn: 9090' >>> >>> BTW, nohup is one way to keep something running after you log out >>> (systemctl services being the pro/real way) >>> >>>> The following book chapter explain things reasonably well: >>>> >>>> https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessf… >>>> >>>> Nowadays, you would use Baselines and git though. >>>> >>>> I can give you more info if you want. Feel free to ask questions. >>>> >>>> Sven >>>> >>>>> On 16 May 2020, at 07:00, Sanjay Minni < >> >>> sm@ >> >>> > wrote: >>>>> >>>>> Hi >>>>> >>>>> Eventually in a Digitalocean Ubuntu droplet, I connected from Windows >>>>> 10 >>>>> to >>>>> a Ubuntu Graphical desktop, installed PharoLauncher and couple of >>>>> images >>>>> and >>>>> got seaside up, installed Mongo DB and a Pharo App. pretty smooth and >>>>> can >>>>> share how to step by step if anybody is interested. >>>>> >>>>> (note: no additional software is required on Windows 10 except chrome >>>>> - >>>>> as >>>>> SSH, Remote Desktop is inbuilt, Chrome only for its VNC app) >>>>> >>>>> Question: what is the best way to run and leave the Pharo App as a >>>>> seaside >>>>> server running. >>>>> Currently I am running thru the X Desktop and if I Disconnect / logout >>>>> from >>>>> the remote desktop session then the pharo app may go down. also is >>>>> that >>>>> the >>>>> most stable and resource optimised way >>>>> >>>>> further: is Apache recommended >>>>> >>>>> >>>>> >>>>> >>>>> ----- >>>>> cheers, >>>>> Sanjay >>>>> -- >>>>> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >>>>> >>>> >> >> >> >> >> >> ----- >> cheers, >> Sanjay >> -- >> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 17, 2020

Re: [Pharo-users] Willow affordance setValueTo etc

by TomaÅ¾ Turk

> aText identifyIn: html; > changeContentsTo: 'Some text'. > Great, it works, thanks. Best wishes, Tomaz >

May 17, 2020

Re: [Pharo-users] FFI and absolute path to dll

by ASAM

Thanks for the tips. It really helped me a lot. The dll is now loaded (I chose the 64-bit version of the dll). I am currently working on value mashalling and I want to create an ENUM class subclass from FFIEnumeration. Inside http://books.pharo.org/booklet-uffi/pdf/2020-02-12-uFFI-V1.0.1 i read chapter 4.4 Enumerations. I tried the example. For me, however, only new class variables are created after "ExampleEnumeration initialize". Is that okay? or a bug? In Doc..."You will see that the enumeration class gets redefined as follows creating and initializing a class variable for each of its elements." but i can't see the initializing. Do I have a mistake in thinking? Thanks for your help and time. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 17, 2020

Re: [Pharo-users] Willow affordance setValueTo etc

by Gabriel Cotelli

Hi Tomaz, Just from my memory try: renderContentOn: html | aText aButton | aText := self componentSupplier singleLineTextFieldApplying: [ :theField | ]. aText identifyIn: html; changeContentsTo: 'Some text'. aButton := self componentSupplier asynchronicButtonLabeled: 'Click me' applying: [ :theButton | ]. aButton onTrigger setValueTo: 'Some other text' thenTriggerChangeOf: aText. We're trying to self-identify components when needed, so you can raise an issue on the issue tracker and we can see if this case can be automatically handled. On Sun, May 17, 2020 at 6:42 AM TomaÅ¾ Turk <tomaz.turk(a)ef.uni-lj.si> wrote: > Dear all, > > I'm playing with Willow and found it very useful for setting the web > design, however, I have some challenges with understanding the interaction > affordances. They are nicely described in the documentation - although > somewhat cryptic. For instance, I cannot successfully set up the > #setValueTo:thenTriggerChangeOf: "directly" on the TextField like in this > example, where I'd like to set the text of aText to 'Some other text' after > the button aButton is clicked: > > renderContentOn: html > | aText aButton | > aText := self componentSupplier > singleLineTextFieldApplying: [ :theField | ]. > > aText changeContentsTo: 'Some text'. > > aButton := self componentSupplier > asynchronicButtonLabeled: 'Click me' applying: [ :theButton | ]. > > aButton onTrigger setValueTo: 'Some other text' thenTriggerChangeOf: > aText. > > The web browser reports 500 Internal server error with The identifier was > never assigned. > > It is mentioned in the docs that IdentifiedWebView should be used to > guarantee the id, however I cannot get it to work. > > As I understand, #serialize; #setValueTo: can be used instead of > #serialize; #evaluate: ; #render affordances to get the data from the > browser, inspect it and sending it back to the browser - or should > #determineBehaviorByEvaluating always be used for that purpose? > > Thanks, > Tomaz >

May 17, 2020

Willow affordance setValueTo etc

by TomaÅ¾ Turk

Dear all, I'm playing with Willow and found it very useful for setting the web design, however, I have some challenges with understanding the interaction affordances. They are nicely described in the documentation - although somewhat cryptic. For instance, I cannot successfully set up the #setValueTo:thenTriggerChangeOf: "directly" on the TextField like in this example, where I'd like to set the text of aText to 'Some other text' after the button aButton is clicked: renderContentOn: html | aText aButton | aText := self componentSupplier singleLineTextFieldApplying: [ :theField | ]. aText changeContentsTo: 'Some text'. aButton := self componentSupplier asynchronicButtonLabeled: 'Click me' applying: [ :theButton | ]. aButton onTrigger setValueTo: 'Some other text' thenTriggerChangeOf: aText. The web browser reports 500 Internal server error with The identifier was never assigned. It is mentioned in the docs that IdentifiedWebView should be used to guarantee the id, however I cannot get it to work. As I understand, #serialize; #setValueTo: can be used instead of #serialize; #evaluate: ; #render affordances to get the data from the browser, inspect it and sending it back to the browser - or should #determineBehaviorByEvaluating always be used for that purpose? Thanks, Tomaz

May 17, 2020

Spec2 Pharo8/9; icons

by TomaÅ¾ Turk

Dear all, What would be the best Pharo version to start building a Spec2 GUI for an app - Pharo 9 which is under development but with novelties in Spec2, or Pharo 8? What's the best (easiest ...) way to import new icons into Smalltalk ui icons? Is there any special bitmap format to be considered? Thanks and best wishes, Tomaz

May 17, 2020