August 2017 - Pharo-dev - lists.pharo.org

Little extensions to easily manage file versions
by Stephane Ducasse Aug. 19, 2017

Aug. 19, 2017

Hi I really like (when I save little data files) to have a simple versioning. For example for my game collection I have Games.1.ston Games.2.ston ... and I like that this is managed for me by the system. I harvested this functionality from squeak long time ago. I rewrote it fast and dirty in Pharo. I find this two methods super handy and they provide cheap versioning for little files. lastNameFor: baseFileName extension: extension "Assumes a file name includes a version number encoded as '.' followed by digits preceding the file extension, e.g., games.22.ston Answer the file name with the largest number. If a version number is not found, raises an error" "FileSystem workingDirectory lastNameFor: 'games' extension: 'ston'" | files | files := self childrenMatching: baseFileName , '.*.' , extension. files ifEmpty: [ ^ self error: 'No file with number pattern' ]. ^ (files asSortedCollection: [ :a :b | a basename < b basename ]) last nextNameFor: baseFileName extension: extension "Assumes a file name includes a version number encoded as '.' followed by digits preceding the file extension, e.g., games.22.ston Increment the version number (of the largest one) and answer the new file name, e.g., games23.ston If a version number is not found, set the version to 1 and answer a new file name" "FileSystem workingDirectory nextNameFor: 'games' extension: 'ston'" | files splits version | files := self childrenMatching: baseFileName , '.*.' , extension. files ifEmpty: [ ^ baseFileName , '.1.' , extension ]. splits := files collect: [ :filename | filename basename splitOn: $. ] thenSelect: [ :split | (split at: 1) = baseFileName and: [ split size = 3 ] ]. splits := splits asSortedCollection: [ :a :b | (a at: 2) < (b at: 2) ]. version := splits isEmpty ifTrue: [ 1 ] ifFalse: [ (splits last at: 2) asNumber + 1 ]. ^ baseFileName , '.' , version asString , '.' , extension I think that these to methods can be a valuable addition to fileReference (the methods can be better implemented). Let me know what you think. https://pharo.fogbugz.com/f/cases/20324/Handy-file-automatic-numbering Stef

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[ Pharo 70 ] Build 44 PR 212 Add-build-number-to-SystemVersion
by Stephane Ducasse Aug. 18, 2017

Aug. 18, 2017

https://pharo.fogbugz.com/f/cases/20321/Add-build-number-to-SystemVersion https://github.com/pharo-project/pharo/pull/212

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Is there a way to remove the extra protocol in calypso?
by Stephane Ducasse Aug. 18, 2017

Aug. 18, 2017

Hi denis The extra protocols are super confusing for newbies. Is there a setting to remove the critiques (because it flickers) from the protocols. Can we remove the overrides and inherited? I do not care to know that I overrides initialize from Object for example. When you learn a system you do not need to have bells and whistles. You should be able to concentrate. Stef

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Initial Feedback on Pharo 7 contribution process
by Torsten Bergmann Aug. 18, 2017

Aug. 18, 2017

Hi, even when contributing to Pharo 7.0 is still very very cumbersome I was able to sort out most of the problems and contribute already a few smaller things. Unfortunately there is not much communication on what is currently in the pipe or planned on easing the process - which can easily lead to the impression that we do not really move or slow us down. I know step by step it goes and at least we have again the build process rolling https://pharoweekly.wordpress.com/2017/08/16/pharo-70-is-starting-to-roll-f… Nonetheless one of my PRs was already integrated and the integration of my WebBrowser package is still in the pipe (https://github.com/pharo-project/pharo/pull/193) The descriptions from Guille helped me - but there are still things I need answers to: 1. Will or is it still possible to automatically update" an image in Pharo 7 or in the future? The World menu entry "System" -> "System update" has been removed? Is this temporary of will it return once we know how it could be done again? 2. In latest Pharo 7.0 image there is a glitch that a method category has a typo in class "HEBinaryReaderWriter" and is "writting" instead of "writing". Lets assume I want to fix such a simple problem. But Hermes was an external package managed on GitHub. And it is now part of the image and therefore also in the "pharo" repo on GitHub. So how is it maintainted/managed with the new process? So do I fix this as a regular PR for Pharo 7 https://github.com/pharo-project/pharo or should it be fixed in the original repo https://github.com/tesonep/hermes and Hermes is synched from time to time into or from Pharo. 3. What still hit me most is that it is hard to identify the images and find out how "new" they are. Example: In Guilles example https://github.com/guillep/PharoIntegrationProcess/wiki/Contribute-a-fix-to… it is written that one should use wget -O - get.pharo.org/70+vm | bash This gives me an image file called "Pharo.image" and after a few days I do not know how old it is or what it was built from. When I start the image and look into the about box it gives me Pharo 7.0 Latest update: #0 telling me nothing and when I run SystemVersion current it says "Pharo7.0SNAPSHOT of 16 August 2017 update 0" which is also very useless. Both do not tell me anything about the build number!!! I can only guess the git commit from the name of the sources file: Pharo7.0-32bit-c28bff9.sources When I check https://github.com/pharo-project/pharo/commits/development with "c28bff9" then at least I have an idea how old it is. Especially the last topic is a pain point and the most pressuring to be discussed - without a clear image build number in the version/about box nobody is able to reproduce in which image one run into trouble or he is basing his work on. I know during transition time we need more patience and things will get more stable and we make progress over time. But I whised we would have more communication on the overall topic (current work, plans, ...) on this list here. I have no idea who is working on what already regarding making the process more easier. Thanks for any comments or own feedback you can share. Regards T.

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[ Pharo 70 ] Build 43 PR 208 Open-a-package-extending-a-class-via-the-extension-protocol
by Stephane Ducasse Aug. 18, 2017

Aug. 18, 2017

https://pharo.fogbugz.com/f/cases/20062/Open-a-package-extending-a-class-vi… https://github.com/pharo-project/pharo/pull/208

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Re: [Pharo-dev] [Pharo-users] [ann] moldable brick editor - alpha
by Aliaksei Syrel Aug. 18, 2017

Aug. 18, 2017

Hello Stephan, > Yep. I tried with a clean 6.1 install. > The Moz2D library is downloaded, but does not seem to be installed > correctly Below is the list of dependencies for *64bit Ubuntu* and *32bit Pharo*: (on 64bit pharo it should theoretically work out of the box, except 64bit related issues) > sudo dpkg --add-architecture i386; > sudo apt-get update; > export PKG_CONFIG_PATH=/usr/lib/i386-linux-gnu/pkgconfig/; > > echo "Installing c++ libraries"; > sudo apt install libstdc++6:i386; > > echo "Installing GTK-2.0..."; > sudo apt-get install libgtk2.0-0:i386; > echo "Installing GTK-3.0..."; > sudo apt-get install libgtk-3-0:i386; > > echo "Installing libGL..."; > sudo apt-get install libglu1-mesa:i386; We have travis Build which is green: https://github.com/syrel/Sparta/blob/master/.travis.yml https://travis-ci.org/syrel/Sparta On Windows users should install Visual C++ Redistributable for Visual Studio 2015: (reduces binary size by >10mb) https://www.microsoft.com/en-US/download/details.aspx?id=48145 On OSX works out of the box Cheers, Alex On 18 August 2017 at 17:01, stephan <stephan(a)stack.nl> wrote: > On 12-08-17 10:47, Tudor Girba wrote: > >> Is this still an issue? >> > > Yep. I tried with a clean 6.1 install. > The Moz2D library is downloaded, but does not seem to be installed > correctly > > > Could you also try on another OS (just to make sure)? > > next step > > Stephan > >

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Add JSONSchemas to NeoJSON
by henry Aug. 18, 2017

Aug. 18, 2017

Is Sven still working on NeoJSON? I want to help expand it to use JSONSchemas. https://spacetelescope.github.io/understanding-json-schema/ I was looking at ASN1Module in Cryptography... - HH

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Pharo behind ALLSTOCKER marketplace
by Masashi UMEZAWA Aug. 17, 2017

Aug. 17, 2017

Hi all, >From Torsten, I've received a request to post about some technical details of ALLSTOCKER (http://pharo.org/success/AllStocker) . I hope these notes will be interesting to Pharo web developers. - Seaside / Teapot We are using Seaside as a main framework for ALLSTOCKER marketplace. Seaside's component architecture is great for extending application in an organized way. ALLSTOCKER prototype was originally composed of only 3 class categories. Now these were gradually grown to 70 categories. But we still feel that they are manageable. We also use Teapot for building Web-based API in a quick way. Recently we've built webhook handlers for integration with other services. - Templating with Mustaside We need a lot of responsive-design web pages for supporting various mobile devices. (It is important especially for Southeast Asian countries, where tablets are popular than PCs). We would like to adopt existing Twitter Bootstrap templates for saving time. So, Mustaside was our choice. http://smalltalkhub.com/#!/~MasashiUmezawa/Mustaside Before Mustaside, there were a lot of noisy #div: sends in our code. Now they are gone. - Localization Our business target is world-wide. So localization is very important topic. Currently ALLSTOCKER supports 4 languages and we will add Chinese languages soon. Translation strings are not only in Smalltalk code, but also in Mustache templates. So we selected Soup for extracting translatable strings in those templates. http://smalltalkhub.com/#!/~PharoExtras/Soup For managing translations, we use Gettext package. http://smalltalkhub.com/#!/~PharoExtras/Gettext - Databases For transactional data, we chose Glorp. Although there are mapping costs, we prefer RDB (Postgres). It is reliable for handling precious order-related data. However, for supporting complex search of machines, we use Neo4j - a graph database. It supports very powerful query language called Cypher. We can avoid complex table joins and get aggregated results faster. http://smalltalkhub.com/#!/~MasashiUmezawa/Neo4reSt - Keyword search ALLSTOCKER supports free keyword search. We selected Elasticsearch for search-engine. Elasticsearch has elaborated searching facilities and those are easily accessible via REST API. We have extended the existing Elasticsearch client for Pharo 5. https://github.com/newapplesho/elasticsearch-smalltalk - Deployment We are using AWS Elastic Load Balancer and running Nginx as a front-end web server. Two back-end Pharo images are running and load-balanced with sticky sessions. It was sort of difficult to find the appropriate simultaneous number of database connections and Pharo processes. We feel ALLSTOCKER is pretty stable for now, but we need to adjust more for expanding our services. Best regards, -- [:masashi | ^umezawa]

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Can we have subclasses of Process?
by Denis Kudriashov Aug. 17, 2017

Aug. 17, 2017

Hi. Is it allowed to subclass Process? I remember that there were some problems with it but I could not find any information. Generally I think about system processes which can be represented by concrete subclasses. For example explicit UIProcess can be used to remove many #isUIProcess conditions from system. Best regards, Denis

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eventual crashes pharo vm
by henry Aug. 17, 2017

Aug. 17, 2017

Hi all. I was testing with this eventual_test package and it blows up the pharo 6.1 vm. I'd welcome pointers http://www.squeaksource.com/TurquoiseTesting.html - HH

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