February 2019 - Pharo-users

How do you easily re-categorise methods in Calypso?

by Tim Mackinnon

Hi - Iâm scratching my head over how to easily re-caegorise methods in calypso? Iâve overridden some methods in subclasses and picked up the wrong category (which the critic is slapping me for). But when I click on the method - I canât drag it to the new category, so if I click on the pencil in the status line (or the current category name - not sure why they are independently clickable?) - it shows me a rather unhelpful list of protocols. Iâm not sure where this list comes from as it doesnât seem to include any of the protocols that are already in the class? (and those which I want to use?). So I have to start typing âaccesâ and can click on accessingâ¦ Am I missing a simple trick - or is this an area that needs some work?

Feb. 19, 2019

How to uncache Commander menu items

by Tim Mackinnon

I was going to write this question - but Denis pinged me on Discord - however I thought I would lob this into the list in case someone else hits the problem and is searching for it. (Maybe I should stick this in Calypso or Commander faq). My problem was that I had built a sub menu in Calypso and specified the order of the menu items as described in the docs. packageContextMenuActivation <classAnnotation> ^ CmdContextMenuActivation byItemOf: ClyExercismMenuGroup order: self contextMenuOrder for: ClyTaggedClassGroup asCalypsoItemContext However when I went to add some icons and change the ordering I was finding that my menu wasnât updating. There are 2 solutions (one better than the other). The brute force way is: CmdContextMenuActivation resetCache. The elegant way was to add an annotation to my menu ordering method contextMenuOrder <classAnnotationDependency> ^1 Tim By the way - to see what icons you can use in your menus, inspect: ThemeIcons current

Feb. 19, 2019

Re: [Pharo-users] Partition/Sync ready databases for Pharo?

by Esteban Maringolo

Hi Tim, Pierce, No problem, I was going to ask about Fossil as well, I know it is a self contained SCM, with issue tracker, and whatnot. People that uses it don't want to use git except if forced to. So I also ask how this would work. :) I saw SQLite-sync before, but it is a commercial product, and its platform support/setup seems convoluted. dqlite might be a viable alternative, from more than reliable provider, it's is not clear whether I have to use a different library to access SQLite (it seems so) or a special wire protocol/api calls. The only drawback I see is that, according to the the FAQ [1], from the CAP theorem the consensus algorithm puts Consistency and Partition and leaves out Availability. I'm looking into CouchDB and reading its "Definitive Guide"[2] book. It seems straightforward to install, distribute and uses a MVCC approach that puts availability as its top priority, and since my domain data has a low probability of conflicts, the eventual consistency will be more than enough. OTOH I'm not used to document based DBMS, which will require me to rethink a lot of my domain and application models. Also, it has a simple HTTP API (JSON/REST) and there is an existing Smalltalk client that might be ported and adapted to Pharo https://cwiki.apache.org/confluence/display/COUCHDB/Smalltalk Background: I have the prospect to develop an application to replace an existing one that is a desktop app that "syncs" from/to a central server every 15', most of the data entry happens locally and the central server is read only for the most part, it is old, ugly, but it works "reliably", so I must come with an alternative that is as reliable as that, and then provide a better UI/UX, new features, etc. Regards! Esteban A. Maringolo [1] From https://github.com/CanonicalLtd/go-dqlite/ Q: When not enough nodes are available, are writes hung until consensus? A: Yes, however there's a (configurable) timeout. This is a consequence of Raft sitting in the CP spectrum of the CAP theorem: in case of a network partition it chooses consistency and sacrifices availability. [2] http://guide.couchdb.org/draft/index.html El mar., 19 feb. 2019 a las 10:03, Tim Mackinnon (<tim(a)testit.works>) escribiÃ³: > > When you say Fossil - are you referring to "https://fossil-scm.org/index.html/doc/trunk/www/index.wikiâ ? > > Iâve seen it come up a few times - is it good? But rather than subvert Estebanâs thread - if it is the above, can you hook into it to save application runtime artefacts such that a distributed application can read them back (Iâd just sort of assumed it was for saving code and docs) - but it sounds like it can go a bit deeper than that (which seems quite interesting and perhaps what Esteban is after?) > > Tim > > > > On 19 Feb 2019, at 01:46, Pierce Ng <pierce(a)samadhiweb.com> wrote: > > > > On Mon, Feb 18, 2019 at 02:56:10PM -0300, Esteban Maringolo wrote: > >> I have the requirement that an app that I'm prospecting must be able > >> to work offline and synchronize changes once the connection is > >> restored. > >> > >> I want to avoid having to write "sync" logic manually. > > > > I've not done this for real before, but here are some possibilities: > > > > - https://github.com/sqlite-sync/SQLite-sync.com > > - http://www.symmetricds.org/ > > - https://github.com/CanonicalLtd/dqlite > > - Use Fossil as your database > > > > > > > >

Feb. 19, 2019

Re: [Pharo-users] Running pharo in daemon mode

by sergio ruiz

My daemontools run file looks like: #!/bin/bash # settings USER="bandtracker" VM="/home/bandtracker/pharoImages/pharo" VM_PARAMS="-mmap 256m -vm-sound-null -vm-display-null" IMAGE="/home/bandtracker/pharoImages/Pharo.image" # start the vm exec \ setuidgid "$USER" \ "$VM" $VM_PARAMS "$IMAGE" --no-quit but for some reason, it just sits and grinds and restarts.. never remaining started for more than a second.. On February 18, 2019 at 8:19:24 PM, Pierce Ng (pierce(a)samadhiweb.com) wrote: My daemontools run file: #!/bin/sh /usr/bin/setuidgid app1 \ /pkg/vm/pharo -vm-display-null -vm-sound-null app1.image --no-quit ---- peace, sergio photographer, journalist, visionary Public Key: http://bit.ly/29z9fG0 #BitMessage BM-NBaswViL21xqgg9STRJjaJaUoyiNe2dV http://www.codeandmusic.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101

Feb. 19, 2019

Re: [Pharo-users] How do you avoid loading master code which is indirectly referenced by a version in the baseline?

by Guillermo Polito

Hi Sabine, maybe you want to have a look at metacello lock. https://github.com/dalehenrich/metacello-work/blob/master/docs/MetacelloScr… On Tue, Feb 19, 2019 at 1:06 PM Tim Mackinnon <tim(a)testit.works> wrote: > Hi Sabine - you raise an important point, and I am interested in us > getting better answers to this too. Hopefully Dale seeâs this and is > thinking about this in Rowen. Repeatable loading is an important enterprise > feature. > > Tim > > > On 18 Feb 2019, at 15:46, Sabine Manaa <manaa.sabine(a)gmail.com> wrote: > > > > For test and deployment, I have to be sure that I know exactly which > versions > > I load and I have to be sure to be able to load exactly the same code > again. > > I do not speak from my projects but from the projects I use. > > > > I found myself asking people again and again to set tags in their > projects > > and being surprised again and again by changed code even though I am > trying > > to load versions (with versions I mean NOT #stable or #master but like > > v2.2.2). > > > > The reason for this problem I then have, is that often in baselines with > > version numbers (e.g. v2.2.2) other projects are referenced but as > master. > > So in consequence, I load version but get master from another project > which > > is referenced indirectly. > > > > For me, that this is not good at all. I was wondering that this seems > not to > > be a problem for others. > > > > I found out that I can put a lock in my baselines preLoadDoIt for those > > indirectly referenced projects. > > > > Examlpe Artefact v1.0.1 > > > > > https://github.com/pharo-contributions/Artefact/blob/v1.0.1/src/BaselineOfA… > > > > loads github://zweidenker/Units/src (which is master). > > > > I found a solution for this: > > > > In the preLoadDoIt of my baseline I lock Units to a certain commit. > > > > preLoadDoIt > > Metacello new > > baseline: 'Units'; > > repository: 'github://zweidenker/Units:98d5a3d/src'; > > lock. > > > > This solves my problem in this example. > > > > Disadvantage is that I have to analyze everything which is loaded from > the > > projects I use and create a lock for it. > > > > Questions: > > 1.) Wouldn't it make sense to have some mechanism, perhaps in Rowan then, > > where I can say that a project which has a number can only reference > other > > projects with numbers? This would avoid the whole problem > > 2.) How do others solve this problem? > > > > addendum: I do not speak about project versions which are in development, > > here #stable or master are great features. But sometime when a project > has a > > certain state, and it gets a version, then it should not change..imho > > > > > > > > -- > > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > > > > -- Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - *http://www.cnrs.fr <http://www.cnrs.fr>* *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

Feb. 19, 2019

Re: [Pharo-users] Iceberg working with forks - can it be easier?

by Guillermo Polito

On Tue, Feb 19, 2019 at 2:08 AM Tim Mackinnon <tim(a)testit.works> wrote: > Hi Guille - thanks for taking the time to write this upâ¦ in the middle > there I finally spotted the crucial bit âclone the original, push to your > forkâ. I think thats what Iâve been doing wrong - and it leads to all kinds > of confusion (at least Iâm hoping this is what it is). > > You've been doing nothing wrong :). Both are valid things in Git, and to talk about rights and wrongs are fuzzy at the least there. > As I have cloned from my Fork (and in my defence - its because we were > given a repository that collides with the pharo one - exercism/pharo - and > P7 doesnât let us clone from that) - so Iâve had to clone from my fork. > Yeh, that's a bug. It should not be difficult to fix. The thing is, iceberg distinguishes repositories/projects by name. And names are obtained from the repository/project directory name. Then, the plugin made to simplify contributions to pharo, detects the repositories called "pharo" as pharo themselves and do some extra configuration. What happens in your case is that your repository suffers from that extra configuration, which is not the right thing to do in your case... One Idea that was poking around in my head is to be able to "rename" a project independently of its location in disk. We already have a metadata file at the root of the repository. We could add in that metadata file properties like: - the project's name (for example you could call it "pharo-exercism" in there, while keeping the tree structure) - an extra special property "isPharoRepository : true" that may be defined only for pharo - a canonical-repository url which could be used to compare against pharo's canonical url Implementing the detection of pharo's repository using any of those strategies could solve your problem... What do you think? > It all seemed to work until I started submitting my PRâs and then they > seem to include commits going much further back than I think they should > need Even wen I thought I was being careful and syncing to master - it > still seems to go back to some of my earliest work. > This looks like a mis-manipulation of branches, and It smells to me that it is not related to the issue above... Next time it happens, I'd like, if you can, that you share with me the exact: - branch - commitish that you're trying to make a PR from, to see if we can see the real cause, and at least build some docs on it ^^. > Now that we have managed to get the repo renamed - I will try working like > you have suggested and make sure that it is working like you describe - as > it shouldnât be as complicated as this to make clean isolated changes and > then submit them as a PR. (otherwise Pharo would fall apart). > > One question I do have however - is what is the best procedure if you > realised when making changes that > A) you forgot to make changes in a branch (so are working on master) > It depends if your changes have been pushed or not. 1) First thing is to fix your local branch with the expression I told in a previous email repo branch commit: repo branch commit parent. 2) If you have already pushed, that means that you have to rewrite the history on the remote side, and that would require a push force (from the command line so far, unless you would like to implement that in iceberg :P). > B) you are working in a branch but decide some of your changes should go > in another branch itself based on master (how to stash?) > There is no stash mechanism in iceberg (so far). What I do is: - I checkout the base branch (master in this case) in expert mode => do not touch my image code, then the image itself will work as a stash - I now checkout a new branch (that will "fork" from the last commit in my master branch) - I commit only the things I want to commit. (see that this is not much different from what you would have done from the terminal except that the checkout strategy will make the stashing unnecessary: - git stash - git checkout master - git checkout -b myBranch - git stash pop - git commit ) Then you can either - discard all your extra changes (I'd suggest to have committed them earlier :)) to be in a clean master+yournewchanges - or you can go back to your first branch > > These are 2 common scenarios Iâve found when trying to be a good citizen > for my little project. Do I have to go to the terminal to do this stuff - > or can I cleanly do these kinds of operations in Pharo (which I think you > should be able to do, as its so easy to get into either of those states). > > I think you can do everything so far except the push force. Still I'm not happy with what we have (and I'd like to have 48h days) :) To help in your first scenario: - It should not be difficult to get the reset on the UI ( https://github.com/pharo-vcs/iceberg/issues/1174) ;) - The same with the push force For the second scenario, what bothers me the most is the special checkout that may confuse people. Also, while you're doing it, you may have not committed your code anywhere => and that's dangerous, because you may lose it. So, imagine this: you are in branch A and you have these changes that you wan to put in branch B. Instead of doing strange stashing/checkout blah, you create a new branch temp/AtoB and commit there. And then you move to B and apply a smart cherry pick operation of your changes. Martin was visiting the team last week and he had a super nice prototype: you select what you want to cherry pick from a branch and it automatically selects all (static) dependencies in the same branch, and proposes you doing a commit/merge of that. I don't know how far are we from this, but it would be super nice to do easy backporting between branches (think pharo8 -> pharo7). Guille Thanks in advance. > > Tim > > On 18 Feb 2019, at 08:56, Guillermo Polito <guillermopolito(a)gmail.com> > wrote: > > Hi! > > On Fri, Feb 15, 2019 at 7:06 PM Tim Mackinnon <tim(a)testit.works> wrote: > >> Hi guys - Iâve spent a few hours scratching my head trying to understand >> why some of my Pull Requests to a project I had forked kept showing my >> previous commits when I thought I was all caught up. >> >> It suddenly dawned on me, that when I had forked, and then done some work >> and then submitted a PR, and then applied it upstream that my fork is now >> no longer in sync with its upstream counterpart. >> >> Having not done this in ages, it took me a while to then realise I have >> to do some git stuff to get it back in sync e.g. (and I think Iâve got this >> right) >> >> git fetch upstream (or whatever name you gave it) >> Git checkout master >> Git merge upstream/master >> > > When you did your clone, did you clone the original repository or your > fork's? > One way to simplify this workflow is: > - you clone always the original repository > - you create a branch and work there > - then you'll push your branch to your fork + fork > > That way your branch will be always up to date with the original > repository, and no need to sync (actually the sync is done automatically > when you push to your fork). > > Of course this assumes you're doing a new clone every time you work :). > > >> >> So I guess my question is - wouldnât it be helpful if this was a command >> in Iceberg? > > > It would, there are several places where we could simplify the workflow > for common cases, I agree. > > >> It seems quite common to fork a project (I think this is still >> recommended for pharo itself isnât it?) > > > I'd say its mandatory :). Otherwise you will not be able to push directly > to it because of permission problems (actually all main dev branches are > now blocked so **nobody**, not even admins, push to them directly). > > >> - and then at some point you need to catchup with that origin again? Or >> am I missing something? > > > Well, it really depends on the workflow you use. Above I've explained a > workflow that works when you clone every time. > Git is so complex and so low level that you can do lots of different > things with it. > > First thing is to understand what "catch up with origin" means. In my head > it only means: > - checkout your "to-catchup" branch > - merge the remote "to-catchup" branch and merge it > > All the rest is workflow dependent. Even (!!) I would argue that merging > is not, strictly speaking, a correct way to catch up: If you have made > changes into "to-catchup", then merging will not make both branches the > same, but your "to-catchup" branch may have extra commits that you did not > want to introduce... > > And here I'm not saying you should not merge, actually I do it most of the > times because I know that 90% of the times it will be ok, and I do rollback > when I realize I was in the other 10%... > > >> I guess lots of stuff can go wrong - but if it does - youâd still get the >> same problems on the command line. > > > Yes, and no. The "lots of stuff can go wrong" can be translated in most of > the cases to "I had a merge conflict". But this is not git, this is > git+pharo. > > The thing is that with Git, your code is dead in files. With Iceberg, your > code is in the files but it also may be alive in your image too. So > updating code for what you have existing instances, or announcement > subscriptions or other could (and probably will) mess up with the running > code... > So to the typical merge conflict, you may add breaking your running system. > > It just seems that for normal situations - it would be handy to run this >> straight in Pharo. >> >> Thoughts from the git experts? >> > > For these cases, you can do exactly as the command line from Iceberg's UI > > - change your branch to your "to-catchup" master > - fetch > - now you can go to the merge option, and choose to merge your remote > branch into your checked-out branch. > - and push > > Of course, this simple workflow works most of the times, but you may find > edge cases. > For those edge cases (typically updating iceberg itself, or trying to > update pharo itself), in the checkout preview you will have the combo with > the checkout strategy: choose the expert mode "do not load the code". This > option will change the branch on git's world, but it will not load the code > in your image. > > That is useful if you have living instances for example. > This option will though make a diff between the checked out version and > your image code and show you differences. (think this as a git reset --soft) > > To me the fact that we are manipulating live code loaded in the image and > not dead files makes a huge difference, and this makes that extrapolating > git commands to iceberg is not so straight forward :). Also, understanding > that git is stateful/context dependant, and applying an operation means > changing your current state (modify your current branch, change your > current branch) is useful to see the consequences. > > In any case, any more concrete suggestions for enhancing this workflow are > welcome. I think that neither Esteban, Pablo, me nor other contributors are > skilled UI designers, and thinking about the best way to present a usecase > to a user is super super hard :). > > Guille, from his vacations > > > -- Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - *http://www.cnrs.fr <http://www.cnrs.fr>* *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

Feb. 19, 2019

Re: [Pharo-users] RBPattern syntax

by Henrik Sperre Johansen

Manuel Leuenberger wrote > Hi, > > I am looking into the RB pattern language for refactoring and I am having > trouble matching and replacing non-trivial pattern. Given the following > excerpt, I want to match "b shape > <rest> > ." and replace it with "b shape: [ :x | x > <rest> > ]" > > b shape circle > size: 15; > color: (Color veryLightGray alpha: 0.4); > if: [ :value | toBeRed includes: value ] fillColor: Color red. > > How can I do this? I tried using "b shape ``@messages", but this only > matches "b shape circle". Using "b shape `message `;middle; `;last" for > some reason then also matches the following, which I think it should not: > > b edges > moveBehind; > connectToAll: [ :v | > v \\ 20 ~~ 0 > ifTrue: [ Array with: v + 1 with: v + 20 ] > ifFalse: [ Array with: v + 20 ] ]. > > There seems not be too much documentation about the pattern language, only > found tests, some short help description from RB and Yuriy's MatchTool. > How can I match the node correctly? > > Cheers, > Manuel The best documentation is at https://refactory.com/rewrite-tool/ What isn't covered, is cascade nodes (`@;messages1), but my first naive attempt did not work as I expected on your example; '(b shape `@method: `@keywords) @;messages1: `@args' -> 'b shape: [ :x | (x `@method: `@keywords) @;messages1: `@args ]' b shape circle size: 15; color: (Color veryLightGray alpha: 0.4); if: [ :value | toBeRed includes: value ] fillColor: Color red -> b shape: [ :x | x circle size: 15 ]; shape: [ :x | x circle color: (Color veryLightGray alpha: 0.4) ]; shape: [ :x | x circle if: [ :value | toBeRed includes: value ] fillColor: Color red ] -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Feb. 19, 2019

Re: [Pharo-users] Partition/Sync ready databases for Pharo?

by Tim Mackinnon

When you say Fossil - are you referring to "https://fossil-scm.org/index.html/doc/trunk/www/index.wikiâ ? Iâve seen it come up a few times - is it good? But rather than subvert Estebanâs thread - if it is the above, can you hook into it to save application runtime artefacts such that a distributed application can read them back (Iâd just sort of assumed it was for saving code and docs) - but it sounds like it can go a bit deeper than that (which seems quite interesting and perhaps what Esteban is after?) Tim > On 19 Feb 2019, at 01:46, Pierce Ng <pierce(a)samadhiweb.com> wrote: > > On Mon, Feb 18, 2019 at 02:56:10PM -0300, Esteban Maringolo wrote: >> I have the requirement that an app that I'm prospecting must be able >> to work offline and synchronize changes once the connection is >> restored. >> >> I want to avoid having to write "sync" logic manually. > > I've not done this for real before, but here are some possibilities: > > - https://github.com/sqlite-sync/SQLite-sync.com > - http://www.symmetricds.org/ > - https://github.com/CanonicalLtd/dqlite > - Use Fossil as your database > > >

Feb. 19, 2019

Phorms repository?

by Manuel Leuenberger

Hi, I am looking into AST transformations and played with the RBPattern language, which isn't quite powerful enough to do what I want to do (my matching patterns are more complex). I found papers about Phorms, which seems like a nice language to investigate. But I could not find any repository to load the code from. Where can I find the Phorms code? Cheers, Manuel

Feb. 19, 2019

Re: [Pharo-users] OSProcess / OSSubprocess / LibC uniqueInstance

by Albrecht Baur

Thank you. The Metacello snippet helps. It loads a newer version than that from the catalog browser. But 2 more questions: 1.: Is there a reason not to use just ... LibC uniqueInstance system: 'zip -r 123.zip zipme/' ... ? And 2.: Is it ok to use OSSubprocess on in 64 bit images even though the documentation says it doesn't work ? (but it does) -> https://github.com/pharo-contributions/OSSubprocess#installation On 19.02.19 13:05, Serge Stinckwich wrote: > Thank you Thierry. > > On Tue, Feb 19, 2019 at 12:48 PM Thierry Goubier > <thierry.goubier(a)gmail.com <mailto:thierry.goubier@gmail.com>> wrote: > > Hi Serge, Albrecht, > > loading OSProcess directly with the following expression works: > > Metacello new > Â Â configuration: 'OSProcess'; > Â Â repository: 'http://www.squeaksource.com/MetacelloRepository'; > Â Â load > > There is still some work to be done on OSProcess adaptation to Pharo > 7, but they are in rarely used parts. > > Regards, > > Thierry > > Le mar. 19 fÃ©vr. 2019 Ã 12:19, Albrecht Baur via Pharo-users > <pharo-users(a)lists.pharo.org <mailto:pharo-users@lists.pharo.org>> > a Ã©crit : > > > > I need to execute OS commands from within a x64 pharo 7.01 image > on centos7 (for example: 'zip -r 123.zip zipme/'). > > > > I found these 3 tools: OSProcess, OSSubprocess, LibC uniqueInstance > > > > But I did not find any docu on which one to use for which use case. > > > > OSProcess is in the catalog browser but fails loading because of > ByteArray>>ifNotNilDo: > > -> So OSProcess is not to be used with p7 ? > > > > OSSubprocess loads via catalog browser and the following snippet > works (even though 64 bit): > > > > OSSUnixSubprocess new > >Â Â Â command: 'zip'; > >Â Â Â arguments: #('-r' '123.zip' 'zipme'); > >Â Â Â redirectStdout; > >Â Â Â runAndWaitOnExitDo: [ :process :outStringÂ | > >Â Â Â Â Â outString inspect > >Â Â Â ] > > > > So is it ok to use OSSubprocess with 64 bit even though > documented as 32 bit only ? (here: > https://github.com/pharo-contributions/OSSubprocess#installation) > > > > LibC uniqueInstance system: 'zip -r 123.zip zipme/' > > ... works, but I don't know if its the right tool for this. > > > > Is there somewhere more info on which tool to use for which use > case ? > > > > Thanks in advance! > > > > Albrecht > > > > PS.: I need to use zip as os process only because of this issue: > https://github.com/pharo-project/pharo/issues/2584 > > > > -- > Serge Stinckwic > âhâ > > Int. Research Unit > Â on Modelling/Simulation of Complex Systems (UMMISCO) > âSorbonne University > Â (SU) > French National Research Institute for Sustainable Development (IRD)â > U > âniversity of YaoundÃ© Iâ, Cameroun > "Programs must be written for people to read, and only incidentally > for machines to execute." > https://twitter.com/SergeStinckwich > > â

Feb. 19, 2019