November 2020 - Pharo-dev - lists.pharo.org

Recommendation for password encryption?
by Mariano Martinez Peck Sept. 30, 2022

Sept. 30, 2022

Hi guys. Some time ago I asked about the best way to encrypt a password. Some of the recommendations I got was: 1) Generally for passwords you do not write a decrypt method for security purposes (eg you do not want people to be able to reverse engineer the encrypted password easily) 2) put a little salt 3) There is http://www.squeaksource.com/Cryptography/PasswordHashingFFI 4) I should not decrypt password but instead I should compare both encrypted versions to see if they are equal. My scenario is the following. I need to store database passwords in text files. So I don't want to let them as plain text. And while I understand 4), I think it's a different scenario than mine. I know that some database driver may allow you to directly send the encrypted password. But still...I have another similar scenario in which I have to store a password and then send it (unencrypted)...so I kind of really need a bi-directional encryption. Now..I would try to avoid having an external library + FFI. Any ideas what is the best thing I can do? And how could I solve 1) if I want bidirectional like in my case? Thanks in advance, -- Mariano http://marianopeck.wordpress.com

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[ANN] New UI renderer with Hi-DPI support (Beta testing)
by Ronie Salgado Nov. 30, 2020

Nov. 30, 2020

Hello, The last months I have been working in a new UI rendering framework for Pharo based on adding an intermediate scene graph with the purpose of improving rendering speed, and with the side effect of making the whole UI scalable and adding support for Hi-DPI rendering. We would appreciate that people could start testing this so that we can find bugs and stabilize it. For using this the latest Pharo 9 image and headless vm is required. Form Scene Graph repo, installation and settings repository: https://github.com/ronsaldo/form-scene-graph Known issues: - Iceberg is hanging on fetches and pushes only when using the Athens backend. No segmentation fault or debugger is being launched here so this is difficult to fix. When having to deal with this issue we recommend using the OSWindowGenericRenderer backend (SDL2). Best regards, Ronie

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[ANN] New Pharo VM released (v8.6.1)
by tesonep＠gmail.com Nov. 27, 2020

Nov. 27, 2020

Hi, this is an announcement of a new release of the Pharo VM. This new version is available to be downloaded through get-pharo scripts and through the Pharo Launcher. From the Pharo Launcher, remember to update the VM from the VM manager window. This version includes a series of improvements: - Unification of code base with the headless VM - Preparation for supporting HDPI displays. - Improvements in the speed of Threaded FFI (40x times faster in SameThread runner and 2x in Threaded worker). - Better handling of semaphores - Improvements in the loading of large images (better buffering) - Better support for headless execution on non-main thread Please let me know if you find any issues. Cheers, Pablo -- Pablo Tesone. tesonep(a)gmail.com

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This week (48/2020) on the Issue Tracker
by Marcus Denker Nov. 27, 2020

Nov. 27, 2020

That was a busy week.. we merged 50 Pull requests the last 7 days. And no, not only trivialities! Graphics ======== Add the missing implementation of OSSDL2GLRenderer >> #pixelExtent #7786 https://github.com/pharo-project/pharo/pull/7786 Clean the OSWindowGenericRenderer texture APIs for properly implementing a text renderer #7836 https://github.com/pharo-project/pharo/pull/7836 Fluid Class Definition ======================= Cleanupsâ¦ Fixes: #7816 this is what is breaking #7774 #7817 https://github.com/pharo-project/pharo/pull/7817 - 7820 class description contains dead code related to slots printing #7828 https://github.com/pharo-project/pharo/pull/7828 - Trait was missing the #named:package: instance creation method #7837 https://github.com/pharo-project/pharo/pull/7837 - Origin/7770 cleaning old definition printer #7845 https://github.com/pharo-project/pharo/pull/7845 FFI === - Cleanup UnifiedFFI packages #7793 https://github.com/pharo-project/pharo/pull/7793 - Extracting FFI backend #7834 https://github.com/pharo-project/pharo/pull/7834 Variables/Compiler ================== - MetaLinks-Cleanup-Variables2 #7742 Instead of names, use Variables! More to come. https://github.com/pharo-project/pharo/pull/7742 - SemanticAnalysis-Args-are-read #7844 Arguments are now correctly tagged as #read im semantic analysis https://github.com/pharo-project/pharo/pull/7844 - Compilerbased-meta-data-tagging #7779 We now tag methods with #halt calls during compilation instead of scanning bytecode slowly later. https://github.com/pharo-project/pharo/pull/7779 Speed Improvements =================== speedup #hasProperty: a little by using includesProperty: instead of #propertyAt:ifAbsent: - CompiledMethod-hasProperty-use-includesProperty #7854 https://github.com/pharo-project/pharo/pull/7854 This lead to a Proposal: Simplify How Pragmas are stored (feedback wanted!) - https://github.com/pharo-project/pharo/issues/7871 Bug Fixes ============ - Fix side-effect in MCOrganizationDefinition #7815 https://github.com/pharo-project/pharo/pull/7815 - #ensureCreateDirectory` Shouldn't Resolve #7833 https://github.com/pharo-project/pharo/pull/7833 - fixing-title-in-osx #7843 Blog post: https://thepharo.dev/2020/11/25/a-vm-bug-no-an-image-one/ https://github.com/pharo-project/pharo/pull/7843 - Fixing dependencies error. #7856 https://github.com/pharo-project/pharo/pull/7856 - 7862-Cleaning-finder-code-glicthes #7864 https://github.com/pharo-project/pharo/pull/7864 Small Improvements ================== - 7755 re excessive arguments rule should exclude ffi callouts #7757 https://github.com/pharo-project/pharo/pull/7757 - 7777-Could-we-have-isTestMethod-on-Symbol-too #7785 https://github.com/pharo-project/pharo/pull/7785 - 7347 improve exception description api #7661 https://github.com/pharo-project/pharo/pull/7661 - Accessor generator should create formatted version #7853 https://github.com/pharo-project/pharo/pull/7853 - Add additional linux platform checking #7803 https://github.com/pharo-project/pharo/pull/7803 Unused Varianbles Cleanup ========================= I wrote about this: https://blog.marcusdenker.de/finding-unused-variables-an-example-for-first-… The tests are for now on âself skipâ until we clean the unused vars. - Cleanup-Unused-Ivars #7780 https://github.com/pharo-project/pharo/pull/7780 - add testNoUnusedClassVariablesLeft (skipped for now) #7784 https://github.com/pharo-project/pharo/pull/7784 Lot of activity to clean it up: - Remove unused var in SycMethodNameEditorTest #7799 https://github.com/pharo-project/pharo/pull/7799 - Var cleanup in DependencyAnalyser #7791 https://github.com/pharo-project/pharo/pull/7791 - Care on unused ivars in Renraku #7811 https://github.com/pharo-project/pharo/pull/7811 - Unused ivar MorphicTabManagerAdapter #7809 https://github.com/pharo-project/pharo/pull/7809 - Care on unsued ivars in Calypso #7814 https://github.com/pharo-project/pharo/pull/7814 - Unused ivar in Reflectivity-Tools-Tests #7824 https://github.com/pharo-project/pharo/pull/7824 - Unused ivar in Clap #7822 https://github.com/pharo-project/pharo/pull/7822 - Remove unused trait users #7797 https://github.com/pharo-project/pharo/pull/7797 - Unused ivars in UDPSocketTest #7849 https://github.com/pharo-project/pharo/pull/7849 Cleanups ======== Cleanups are those changes that do not have any immediate impact for the users. But they prepare the future: they make code simpler, remove dead code, add documentation, fix typos... - Move ReAsClassRule to GeneralRules #7759 https://github.com/pharo-project/pharo/pull/7759 - Rule based cleanup for RBCompositeRefactoryChange #7776 https://github.com/pharo-project/pharo/pull/7776 - Simplify ReExcessiveArgumentsRule>>#basicCheck: #7789 https://github.com/pharo-project/pharo/pull/7789 - remove-halt-visitEnglobingErrorNode #7801 https://github.com/pharo-project/pharo/pull/7801 - Fulfil ClassTestCase>>#classToBeTested subclass reponsibility #7805 https://github.com/pharo-project/pharo/pull/7805 - Cleanup and extend Dr. Test #7807 https://github.com/pharo-project/pharo/pull/7807 - Cleanup DrTest - pass #2 #7819 https://github.com/pharo-project/pharo/pull/7819 - Remove FFITutorial #7795 https://github.com/pharo-project/pharo/pull/7795 - Merge-MethodNameEditor-RBMethodNameEditor #7775 https://github.com/pharo-project/pharo/pull/7775 - PharoDocComment : remove a direct reference to RBParser #7781 https://github.com/pharo-project/pharo/pull/7781 - PharoDoc-pass2 #7829 https://github.com/pharo-project/pharo/pull/7829 - [Code cleaning] Replaced 'Character tab asString' to 'String tab' #7835 https://github.com/pharo-project/pharo/pull/7835 - Clean up Base64MimeConverterTest #7851 https://github.com/pharo-project/pharo/pull/7851 - reduce-ASTCache-reset #7783 https://github.com/pharo-project/pharo/pull/7783 - 7857-Cleaning-ends-of-class-names-in-Calypso #7858 https://github.com/pharo-project/pharo/pull/7858 - 7859-CalypsoContextPartTwo #7861 https://github.com/pharo-project/pharo/pull/7861 - Small typo in ExtendedDatePrinter>>#printDate:format:on: #7870 https://github.com/pharo-project/pharo/pull/7870 - Ban rule "class not referenced" for WebBrowser subclasses #7847 https://github.com/pharo-project/pharo/pull/7847

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[ANN] Next Pharo Sprint: Nov 27
by Marcus Denker Nov. 23, 2020

Nov. 23, 2020

We will organize a Pharo sprint / Moose dojo Nov 27 (this Friday) Goals of this sprint: - Fix issues from tracker https://github.com/pharo-project/pharo/issues This is a Remote Sprint, it happens on Discord. http://pharo.org/contribute-events We have added a Board to coordinate the work: https://github.com/orgs/pharo-project/projects/9 A list of all Pharo Event of the year an be found here: https://association.pharo.org/events

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This week (47/2020) on the Issue Tracker
by Marcus Denker Nov. 23, 2020

Nov. 23, 2020

Pharo8 ====== HOT-FIX: Support GitHub Personal Access Tokens. This was already merged in Pharo9 before. - Merge Iceberg v1.6.10 in Pharo 8 #7732 https://github.com/pharo-project/pharo/pull/7732 First class Variables ================ Work continues: some small improvements (e.g. primitve error variables) and cleanups - MetaLinks-Cleanup-Variables2 #7742 https://github.com/pharo-project/pharo/pull/7742 - Variables defined with #primitive:error: are shown as undefined, fixes 7748 #7749 https://github.com/pharo-project/pharo/pull/7749 - Cleanup-SystemDictionary-varlookup #7746 https://github.com/pharo-project/pharo/pull/7746 - 7731-OCUndeclaredVariableWarning-isUninitialized-with-NonInteractiveUIManager #7745 https://github.com/pharo-project/pharo/pull/7745 - DoItVariable instead of ForeignVariable and tests #7710 https://github.com/pharo-project/pharo/pull/7710 ReadOnly Literals ============== Some cleanups... all literals added as literals are read only, no special code needed anymore. - Compiler-compile-all-Literals-readOnly #7631 https://github.com/pharo-project/pharo/pull/7631 - #isReadOnlyLiteral is not needed anymore #7767 https://github.com/pharo-project/pharo/pull/7767 - 7740-CI-32bit-testIsImmediateObject #7744 https://github.com/pharo-project/pharo/pull/7744 Graphics ======== - Add support for creating OpenGL ES contexts #7750 https://github.com/pharo-project/pharo/pull/7750 - Disable the dpi based computation screen scale factor computation in OS X #7747 https://github.com/pharo-project/pharo/pull/7747 Small Improvements ================== - 7755 re excessive arguments rule should exclude ffi callouts https://github.com/pharo-project/pharo/pull/7757 - ReLiteralArrayContainsCommaRule should ignore all UFFI selectors #7754 https://github.com/pharo-project/pharo/pull/7754 Fixes ===== - Allow catalog json to be served from GitHub and other #7738 https://github.com/pharo-project/pharo/pull/7738 - Duplicate API from Behavior to RGBehavior. #7743 https://github.com/pharo-project/pharo/pull/7743 Cleanups ========= And lots of small cleanups. As always, these are not important in itself as single items. But over time, taking them all together, they do matter. - Move ReAsClassRule to GeneralRules #7759 https://github.com/pharo-project/pharo/pull/7759 - 5457-environmentKeyNotFound-looks-deadcode #7773 https://github.com/pharo-project/pharo/pull/7773 - ObjectsAsMethodsTest-move-to-Kernel-Tests #7762 https://github.com/pharo-project/pharo/pull/7762 - Typo #7766 https://github.com/pharo-project/pharo/pull/7766 - DeadCode-Cleanup-Finder #7734 https://github.com/pharo-project/pharo/pull/7734 - FFICompilerPlugin-Simpler #7726 https://github.com/pharo-project/pharo/pull/7726 - Small cleanup on ReMissingSuperSendsRule #7761 https://github.com/pharo-project/pharo/pull/7761 - Typo in RGBehaviorDefinition>>#soleInstance #7752 https://github.com/pharo-project/pharo/pull/7752 - Another cleanup pass on DoubleLinkedList package #7736 https://github.com/pharo-project/pharo/pull/7736 - Cleanup System-Support-Tests #7729 https://github.com/pharo-project/pharo/pull/7729 - BaseStreamTest had just one subclass. Move the tests there and removeâ¦ #7739 https://github.com/pharo-project/pharo/pull/7739 - NautilusRefactoring-DeadcodeClean #7723 https://github.com/pharo-project/pharo/pull/7723 - Introduce package Collections-Sequenceable-Tests #7719 https://github.com/pharo-project/pharo/pull/7719 - Move-isHaltNode-to-AST #7765 https://github.com/pharo-project/pharo/pull/7765

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[Pharo 8.0] Build #1142: Merge Iceberg v1.6.10 in Pharo 8
by ci-pharo-ci-jenkins2＠inria.fr Nov. 19, 2020

Nov. 19, 2020

There is a new Pharo build available! The status of the build #1142 was: FAILURE. The Pull Request #7732 was integrated: "Merge Iceberg v1.6.10 in Pharo 8" Pull request url: https://github.com/pharo-project/pharo/pull/7732 Issue Url: https://github.com/pharo-project/pharo/issues/merge_iceberg_1_6_10 Build Url: https://ci.inria.fr/pharo-ci-jenkins2/job/Test%20pending%20pull%20request%2…

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AST Transformation Techniques
by sean＠clipperadams.com Nov. 18, 2020

Nov. 18, 2020

To generate code, I used to use templates like the following (contrived example): \`\`\`smalltalk `template := 'method1` ` ^ {returnValue}'.` `template format: { #returnValue -> 2 } asDictionary` \`\`\` This is \*okay\* for simple cases, but can get unwieldy, and doesn't benefit from e.g. (early) compiler warnings. It is also lacking when one wants to offer the behavior as a method and also as a script with no dependencies (maybe for CI). To overcome some of these limitations, I started saving the code template as an actual method and transforming the AST, e.g.: \`\`\`smalltalk `"Convert baseline##: method"` ` methodTree := (self methodNamed: selector) parseTree.` ` methodTree selector: #baseline:.` ` methodTree pragmas at: 1 put: (RBPragmaNode selector: #baseline arguments: #()).` ` commonBlockBody := methodTree statements first arguments last body.` ` commonBlockBody statements` ` detect: [ :e | e selector = #repository: ]` ` ifFound: [ :repoSetter | commonBlockBody removeNode: repoSetter ].` ` ` ` "Compile baseline method"` ` baseline compile: methodTree newSource classified: 'baseline'` \`\`\` When I started doing this, I noticed two things: 1\. There were idioms that were repeated over and over. 2\. It still isn't super easy to turn a method into a script with no dependencies (e.g. self sends) So, I did a spike to wrap a few common idioms for this use case. It works like this. Say you have a method like this: \`\`\` `SmallRemoteGitRepository>>#addRemote: urlString as: nameString` ` "Assumes repo is loaded"` ` ` ` | repo remote |` ` repo := IceRepository registry detect: [ :e | e name = self projectName ].` ` remote := IceGitRemote name: nameString url: urlString.` ` repo addRemote: remote.` ` remote fetch` \`\`\` And you want to also provide it as source code for a script with no dependencies. You can do: \`\`\` `SmallRemoteGitRepository >>#scriptToAddRemote: urlString as: nameString` ` | method transformer |` ` method := SmallRemoteGitRepository methodNamed: #addRemote:as:.` ` transformer := method peAST_Transformer` ` beScript;` ` addStatementFirst: #projectName , ' := ' , self projectName printString;` ` addStatementFirst: #nameString , ' := ' , nameString printString;` ` addStatementFirst: #urlString , ' := ' , urlString printString;` ` replaceNodeDetect: [ :e | e isMessage and: [ e selector = #projectName ] ]` ` withNode: (RBVariableNode named: #projectName).` ` ^ transformer newSource` \`\`\` which would generate (for example, for a particular instance): \`\`\` `| repo remote projectName |` `urlString := 'git@github.com:magritte-metamodel/magritte.git'.` `nameString := 'upstream'.` `projectName := 'Magritte'.` `repo := IceRepository registry detect: [ :e | e name = projectName ].` `remote := IceGitRemote name: nameString url: urlString.` `repo addRemote: remote.` `remote fetch` \`\`\` So my questions are: \- Does something like this already exist? \- Are there better ways to solve this problem? \- Does this solution look promising/generally-helpful?

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This week (46/2020) on the Issue Tracker
by Marcus Denker Nov. 12, 2020

Nov. 12, 2020

We merged 20 pull requests and closed 17 issue tracker entries this week. For someone interested in following this more closely: Github has a feature to get an email for all the changes that happen in both the issues and the pull requests. To get emails for those, on the github page you can (after logging in), "watch" the repository. https://github.com/pharo-project/pharo/ There are more PRs done but not merged, they often just need a final review! You can find them here: https://github.com/pharo-project/pharo/pulls Merge spec 0.7.6 #7713 ====================== Spec is an example of a project that is developed in itâs own repository and then merged only when a release is done. We merged 0.7.6 this week, it consists itself of many commits, of course. Here is the ChangeLog: - several enhancements and bugfixes to SpPopoverPresenter. - in SpStyle, introduced the concept of environment variables. Now we can define EnvirontmentFont and EnvironmentColor to reference environment defined variables. - fixed usage of minWidth/minHeight in styles. - fix pharo-spec/Spec#960 - fixed in how SpBoxLayout calculates widths and heights, allowing the toolbar to take its real place. - fixed alignments in SpBoxLayout (hAlign* and vAlign* options now work properly). - added SpToolbarPopoverButtonPresenter. - SpMillerColumnPresenter now understands removeAllFrom: - in tables, fixed the usage of showColumnHeaders (now it show headers even if headers are nil). - in tables, fixed image columns with fixed widths (now calculate correctly the width). - SpCodePresenter commands use new selector extractor. First Class Variables ===================== - Simplify-MetaLinkInstaller #7669 This PR simplifies MetaLinkInstaller by taking advantage of the new unified Variable hierarchy. (first step, more can be done) https://github.com/pharo-project/pharo/pull/7669 - Unify-OCInstanceScope-Behavior #7704 Simplify Name Analysis even more. self/super and friends are now looked up in the global scope. https://github.com/pharo-project/pharo/pull/7704 Debugger Improvements ===================== - Added <debuggerCompleteToSender> pragma to user-level object error-handling protocol methods #7714 (this fixes TDD style development for these cases) https://github.com/pharo-project/pharo/pull/7714 - Return the package column to the debugger #7700 https://github.com/pharo-project/pharo/pull/7700 Fluid Class Definition ======================= Work is progressing... - 7706-New-class-definition-does-not-like-superclass-change #7717 https://github.com/pharo-project/pharo/pull/7717 - 7687-Cannot-remove-a-Trait-written-with-the-fluid-syntax #7689 https://github.com/pharo-project/pharo/pull/7689 - 7522--Fluid--Adding-Setting-for-fluid-Syntax #7686 https://github.com/pharo-project/pharo/pull/7686 - 7690-fluid-printer-has-some-duplicated-logic- #7691 https://github.com/pharo-project/pharo/pull/7691 - 7684-New-trait-UI-wizard-cannot-display-the-package-name-in-apostrophe #7697 https://github.com/pharo-project/pharo/pull/7697 Fixes ===== Fix issue 7703: Build 817 has broken parser #7703 #7708 https://github.com/pharo-project/pharo/pull/7708 Returning default error value only on Error #7705 https://github.com/pharo-project/pharo/pull/7705 fix-fasttable-minHeight #7685 https://github.com/pharo-project/pharo/pull/7685 Cleanups ======== EmbeddedFreeTypeFontFontDescription should be EmbeddedFreeTypeFontDescription https://github.com/pharo-project/pharo/pull/7709 Typo in ClyClassWithUndeclares class comment #7707 https://github.com/pharo-project/pharo/pull/7707 7682-ClassHierarchyPrinter-on-steroid-should-be-back- #7683 https://github.com/pharo-project/pharo/pull/7683 Cleanup Files-Tests package #7712 https://github.com/pharo-project/pharo/pull/7712 CleanBlockChecker-Cleanup #7666 https://github.com/pharo-project/pharo/pull/7666

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Nov. 11, 2020

Hello We are about to launch the new version of the Pharo mooc. Spread the word around you. It will open the 9th of november https://www.fun-mooc.fr/courses/course-v1:inria+41024+session01/about This new version contains 70 new videos about the Pharo ide (in french and english voice) + subtitles better english dubs Now we are looking for help for the subtitles All the subtitles of the previous mooc and the new ones are at https://github.com/pharo-mooc/PharoMooc/tree/master/2020-All-Subtitles-Reor… The new ones in folders named C048SD or 2018-Prese* The old ones in folders named C019SD. For example in https://github.com/pharo-mooc/PharoMooc/tree/master/2020-All-Subtitles-Reor… you see the files for the old videos that we will reuse for this new mooc as well as the subtitles in french and english for the new videos. We are looking for subtitles in Spanish, Japanese for the new files: in C048 and 2018-PresequelOOP-ENG folder, files named W*-Live* or W*-Redo* Of course we would love to have the subtitles in portugese and german too, and any other language :). Thanks in advance for your time. But this mooc is really important for our community. S. -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle FAX 03 59 57 78 50 TEL 03 59 35 86 16 S. Ducasse - Inria 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza Villeneuve d'Ascq 59650 France

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