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

Mini Pharo -> JavaScript translator?
by Alexandre Bergel March 14, 2017

March 14, 2017

Hi! Is there a simple way to translate Pharo code into Javascript? There is Pharo JS, but I cannot load it in Pharo 6. There is the amber compiler, but I cannot find a version for Pharo. Amber takes the approach of translating everything into JavaScript, including the Smalltalk object model. While this is great for fan of bootstrapping images, it produces large javascript code. Is there a kind of Slang for JavaScript? I am looking for something minimal. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Pharo6 supported syntax regression
by Peter Uhnak March 14, 2017

March 14, 2017

Hi, apparently in Pharo 6 pragma attributes can no longer be symbols without hash? In Pharo5 I could do method <attr: Something> and it would compile it as symbol In Pharo6 this is syntax error. I am not asking for resolution either direction (although I guess #Something should be canonical), it is just odd to me that the syntax would change (and maybe some code where people like me forgot to add hash sign will break). Peter

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[pharo-project/pharo-core]
by GitHub March 14, 2017

March 14, 2017

Branch: refs/tags/60440 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] c5a89d: 60440
by GitHub March 14, 2017

March 14, 2017

Branch: refs/heads/6.0 Home: https://github.com/pharo-project/pharo-core Commit: c5a89df18cc0e39d613a3855daa1e0c57a4b396e https://github.com/pharo-project/pharo-core/commit/c5a89df18cc0e39d613a3855… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2017-03-14 (Tue, 14 Mar 2017) Changed paths: M MonticelloFileTree-Core.package/MCFileTreeStCypressWriter.class/instance/private/fileNameMapFor_.st M MonticelloGUI.package/MCFileRepositoryInspector.class/instance/morphic ui/packageSelection.st M Polymorph-Widgets.package/UITheme.class/instance/morph creation/scrollBarDownButtonBoundsFor_.st R ScriptLoader60.package/ScriptLoader.class/instance/pharo - scripts/script60439.st A ScriptLoader60.package/ScriptLoader.class/instance/pharo - scripts/script60440.st R ScriptLoader60.package/ScriptLoader.class/instance/pharo - updates/update60439.st A ScriptLoader60.package/ScriptLoader.class/instance/pharo - updates/update60440.st M ScriptLoader60.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st M Tool-Catalog.package/CatalogProvider.class/instance/actions/reset.st M Tool-Catalog.package/CatalogProvider.class/instance/private/loadProjects.st Log Message: ----------- 60440 19834 Error in horizontal scrollbar https://pharo.fogbugz.com/f/cases/19834 19831 catalog refresh retrieves an empty collection https://pharo.fogbugz.com/f/cases/19831 19823 exported source of the package MonticelloFileTree-Core in pharo-core repository contains strange extension https://pharo.fogbugz.com/f/cases/19823 http://files.pharo.org/image/60/60440.zip

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[ANN] threaded heartbeat VMs added to zeroconf
by Esteban Lorenzano March 13, 2017

March 13, 2017

Hello, Following recent talks, I added threaded heartbeats VMs to zeroconf. Is weird because is not anymore âzeroâ conf: you need to configure the machine to accept this VMâ¦ but well, this is like that :P The links to use are this: http://get.pharo.org/vmT60 http://get.pharo.org/vmTLatest60 http://get.pharo.org/alpha+vmT http://get.pharo.org/alpha+vmTLatest http://get.pharo.org/60+vmTLatest <http://get.pharo.org/60+vmTLatest> (they are listed at http://get.pharo.org <http://get.pharo.org/>, as usual) cheers, Esteban

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Google App Engine allows whatever runtime.
by phil＠highoctane.be March 13, 2017

March 13, 2017

And Pharo should of course run there :-) https://techcrunch.com/2017/03/09/new-version-of-google-app-engine-supports… With Google Cloud functions, maybe this will make sense for the initiative of starting lots of VM superfast, Phil

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Esteban's ChangeLog week of 6 March 2017
by estebanlm＠gmail.com March 13, 2017

March 13, 2017

Hello! This is my weekly ChangeLog, from 6 March 2017 to 12 March 2017. You can see it in a better format by going here: http://log.smallworks.eu/web/search?from=6/3/2017&to=12/3/2017 ChangeLog ========= 10 March 2017: -------------- * === libgit2(ssh) and linux An update on the libgit2 (and consequently iceberg) problem on linux: SSH will not work on ITIMER VM (which is the zeroconf default, at least for now). Here the reason: ITIMER sends an signal to the VM thread using +pthread_kill(tickerThread, TICKER_SIGNAL)+ and that aborts system calls, which are used by +libssh2+, producing a 'wait for packet' to fail answering a timeout ( even if that timeout does not happens for real). Here is an interesting comment from +sqUnixITimerTickerHeartbeat.c+ : ---- /* While we use SA_RESTART to ensure system calls are restarted, this is * not universally effective. In particular, connect calls can abort if * a system call is made in the signal handler, i.e. the pthread_kill in * prodHighPriorityThread. So we avoid this if possible by not prodding * the high-priority thread unless there are high-priority tickees as * indicated by numAsyncTickees > 0. */ ---- ... and sadly, as +OSSubprocess+, +libssh2+ calls falls under the category of "not universally effective" (they are connect calls... once disconnected, you cannot connect again 'as is'). So, the only workaround possible (at least for now), is to use the threaded version of VM... I improved the error message it throws when this fails, now looks like this: ---- This VM uses a thread heartbeat who requires a special configuration to work. You need to allow it to run higher priority threads (real time), to allow clock to work properly You need to add a conf file to /etc/security/limits.d, executing this: sudo cat >/etc/security/limits.d/%s.conf <<END\n", VMNAME); * hard rtprio 2 * soft rtprio 2 END You need to log out and log back in for the limits to take effect. For more information read https://github.com/OpenSmalltalk/opensmalltalk-vm/releases/tag/r3732#linux ---- which at least shows what's happens and how you can easily fix it. Now, I think this is a *sad solution*. Needing to touch system configuration in order to run a VM does not feels "professional". I would like to have some time to find a fix. 9 March 2017: ------------- * I spent last two days again fighting with linux dependencies, because what I thought was fixed (the loading of +libgit2.so+), actually was not working in all conditions. Now, I think I finally arrived to a working solution (that involved add an +rpath+ to Pharo, not to dependent libraries). There is a new +vmLatest60+, let's see how it works... 6 March 2017: ------------- * I spent time fixing libgit2 (and dependents) compilation, both for linux and windows. As a result, now windows is working again (there was problems after version 0.26)... but linux, who seemed working last friday, is now again not working properly :( cheers! Esteban

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[Help Wanted] moderators for pharo mailing lists
by Marcus Denker March 13, 2017

March 13, 2017

Hi, The two Pharo Mailinglists (pharo-dev and pharo-users) are run using Mailman via a commercial provider. (Thanks to the Pharo Association, https://association.pharo.org <https://association.pharo.org/>) This means that we have nothing to do with regard to technical problems/issues or running the service itself. but nevertheless, there are 1-2 emails per month that end up in a moderation queue, mostly because they are very very large. It would be nice to have 1-2 people more to help with these (infrequent) moderation calls. If you are interested to help â> send a mail to me. Marcus

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How to use the serial port on MacOS X?
by olivier auverlot March 13, 2017

March 13, 2017

Hi, I try to use the serial port to communicate with an Arduino. On Linux, no problemo. I can open the serial port with the following code: | serialPort baudRate comPortNumber | baudRate := 31250. comPort := '/dev/ttyACM0'. serialPort := SerialPort new baudRate: 31250; dataBits: 8; stopBitsType: 1; parityType: 0; yourself. "the port is closed to ensure that it will be free" serialPort close. (serialPort openPort: comPort) isNil ifTrue: [ ^self error: 'COM port not available' ] ifFalse: [ serialPort inspect ]. serialPort close. But on MacOS X (10.11.6), the same code used with /dev/cu.usbmodel1411 doesn't run. The error is "Cannot open '/dev/cu.usbmodel1411'". I'm sure that is the correct serial port. If I type "more -f /dev/cu.usbmodel1411" in a terminal, the rx/tx leds of the Arduino are blink. Someone has an idea about this problem that is not specific of the Arduino but concerns the generic usage of the serial port with Pharo? Best regards Olivier ps: I can't test on Windows but I'm interested by a feedback.

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[pharo-project/pharo-core]
by GitHub March 13, 2017

March 13, 2017

Branch: refs/tags/60439 Home: https://github.com/pharo-project/pharo-core

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