July 2017 - Pharo-users - lists.pharo.org

OSProcess lock image
by Hilaire Dec. 12, 2017

Dec. 12, 2017

Hello, On Pharo4, when I type the command: OSProcess waitForCommand: 'ls' it locks the image, I can get back control with [Alt]-. With the same image and VM, this command was previously working, even called from a Seaside component. Any idea? Thanks Hilaire -- Dr. Geo http://drgeo.eu

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How to deploy headless app without changes and source files?
by Andreas Sunardi Nov. 19, 2017

Nov. 19, 2017

I found this StackOverflow question: https://stackoverflow.com/questions/14737695/is-it-possible-to-deploy-a-pha… and this older forum thread: https://www.mail-archive.com/pharo-project@lists.gforge.inria.fr/msg21170.h… I'm using Pharo5.0 and neither of these options is available anymore. What is the new way to do this? -- Andreas Sunardi

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[ann] pillar text editor
by Tudor Girba Nov. 15, 2017

Nov. 15, 2017

Hi, Pillar now ships with a text editor that also features a syntax highlighter. So, now, if you load the development version of Pillar: Gofer new smalltalkhubUser: 'Pier' project: 'Pillar'; configuration; loadDevelopment. You will have an extra presentation when inspecting a .pillar file: The new thing here is that the highlighter is based on the Pillar PetitParser, and it is extensible for highlighting more parts if needed. The highlighting also can support actions. For example, the picture above shows the file to the right after clicking on the reference. Please take a look and let me know what you think. Cheers, Doru -- www.tudorgirba.com www.feenk.com "Things happen when they happen, not when you talk about them happening."

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Pharo 61 crashes on iceberg history
by JuliÃ¡n Maestri Aug. 30, 2017

Aug. 30, 2017

I'm almost sure this is not the right place to report it. Im having a vm crash when looking at the history of a repository on iceberg. urpharo: malloc.c:2394: sysmalloc: Assertion `(old_top == initial_top (av) > && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse > (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed. > ./pharo-ui: line 11: 2011 Aborted (core dumped) > "$DIR"/"pharo-vm/pharo" "$@" > Pharo downloaded from get.pharo.org/64/ on Ubuntu 16.04 (64bit) Has somebody had this problem? Where's the right place to report this? Thanks, JuliÃ¡n

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Re: [Pharo-users] Validate password with PBKDF2
by Udo Schneider Aug. 28, 2017

Aug. 28, 2017

Francis, I can relate to the idea of easily embedding PBKDF2/bcrypt into your code. However the functionality of /managing/ the salt is not specificed in PBKDF2. The spec only covers the actual the hashing part. However wrapping it into a simple to use wrapper is pretty simple. The code below is something I use in my code for example: "Create a new password instance" pwd := KNPassword fromPlaintext: 'secret'. "Now store that instance. It encapsulates hash, generated salt and the load parameter. Because all the load parameters are accessed via methods you can also back them with ivars and have different instances with different load parameters. E.g. for adapting to advances in hash cracking." pwd verify: 'secret'. "Verify the password" CU, Udo 'From Pharo5.0 of 16 April 2015 [Latest update: #50772] on 1 July 2017 at 10:01:05.207245 am'! Object subclass: #KNPassword instanceVariableNames: 'salt hash' classVariableNames: 'PRNG' poolDictionaries: '' category: 'ThreatNews-Core'! !KNPassword methodsFor: 'accessing' stamp: 'UdoSchneider 5/26/2017 11:48'! salt ^ salt ifNil: [ salt := ((1 to: self saltLength) collect: [ :each | self class prng nextInt: 255 ]) asByteArray ]! ! !KNPassword methodsFor: 'accessing' stamp: 'UdoSchneider 7/1/2017 09:58'! iterations ^ 1000! ! !KNPassword methodsFor: 'accessing' stamp: 'UdoSchneider 7/1/2017 09:58'! length ^ 64! ! !KNPassword methodsFor: 'accessing' stamp: 'UdoSchneider 7/1/2017 09:58'! saltLength ^ 16! ! !KNPassword methodsFor: 'accessing' stamp: 'UdoSchneider 7/1/2017 09:57'! hashClass ^ SHA256! ! !KNPassword methodsFor: 'as yet unclassified' stamp: 'UdoSchneider 5/26/2017 11:51'! setPlaintext: aString hash := self hashString: aString! ! !KNPassword methodsFor: 'as yet unclassified' stamp: 'UdoSchneider 5/26/2017 11:52'! verify: aString ^ (self hashString: aString) = hash! ! !KNPassword methodsFor: 'as yet unclassified' stamp: 'UdoSchneider 5/26/2017 11:51'! hashString: aString ^ PBKDF2 derivedKeyHashFunction: self hashClass password: aString salt: self salt iterations: self iterations length: self length! ! "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "! KNPassword class instanceVariableNames: ''! !KNPassword class methodsFor: 'as yet unclassified' stamp: 'UdoSchneider 5/26/2017 11:49'! reset PRNG := nil! ! !KNPassword class methodsFor: 'as yet unclassified' stamp: 'UdoSchneider 5/26/2017 11:49'! fromPlaintext: aString ^ self new setPlaintext: aString; yourself! ! !KNPassword class methodsFor: 'as yet unclassified' stamp: 'UdoSchneider 5/26/2017 11:49'! prng ^ PRNG ifNil: [ PRNG := Random new ]! !

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Copy bitmap to clipboard
by Hilaire Aug. 27, 2017

Aug. 27, 2017

Hi, A Dr. Geo user asked me about copying a DrGeo canvas view in the system clipboard, to past it in other tools as a text writer or any other editing tool. I looked in Pharo3 and Pharo6, I found text clipboard operation but it is not clear if there is support for other format? What about primAddClipboardData:data:dataFormat: I would like to copy and paste the DrGeo canvas as PNG content. -- Dr. Geo http://drgeo.eu

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YAML parser (2017)
by Peter Uhnak Aug. 24, 2017

Aug. 24, 2017

Hi, do we have a working parser for YAML? There's PPYAMLGrammar (in PetitParser), however it doesn't seem to work in Pharo 6 at all (not even tests pass). In Pharo 5 the tests are green, but using it on YAML content still fails... with small fix I managed it to "pass", however the output seems to be a very fine-grained AST decomposition and not the expected output (dictionaries/arrays). So do we have some else/working? YAML specs have BNF descriptions, so maybe SmaCC can generate it? (I don't know SmaCC, so maybe this is not how it works.) Thanks, Peter

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Pharo and QT
by Dimitris Chloupis Aug. 21, 2017

Aug. 21, 2017

Is there an interest for working with QT from Pharo ? I make no promises just something I was interested in trying.

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Re: [Pharo-users] PharoJS
by Craig Latta Aug. 20, 2017

Aug. 20, 2017

Hi-- Aik-Siong writes: > Craig Latta is doing something interesting[1] with SqueakJS which is > an optimized Smalltalk VM in JavaScript and HTML5. It is supposedly > able to run Smalltalk fast inside the browser and access the > JavaScript world freely. I think this route will benefit greatly from > WebAssembly. I'm also making it run Pharo. thanks, -C [1] https://caffeine.js.org -- Craig Latta Black Page Digital Amsterdam :: San Francisco craig(a)blackpagedigital.com +31 6 2757 7177 (SMS ok) + 1 415 287 3547 (no SMS)

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[ANN] PharoLambda a demo of Pharo running on AWS Lambda
by Tim Mackinnon Aug. 17, 2017

Aug. 17, 2017

Hi - Iâve been playing around with getting Pharo to run well on AWS Lambda. Itâs early days, but I though it might be interesting to share what Iâve learned so far. Usage examples and code at https://gitlab.com/macta/PharoLambda <https://gitlab.com/macta/PharoLambda> With help from many of the folks here, Iâve been able to get a simple example to run in 500ms-1200ms with a minimal Pharo 6 image. You can easily try it out yourself. This seems slightly better than what the GoLang folks have been able to do. Tim

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