December 2010 - MacRuby-devel - lists.macosforge.org

Calling Block-based C APIs with Ruby Procs
by Saul Mora 08 Dec '10

08 Dec '10

Hello, I've installed the latest nightly build from 12/7, and tried running the sample code from the last blog post regarding calling [NSArray enumerateObjectsUsingBlock:] from with macirb. I successfully get a segfault every time I run the sample: framework 'Foundation' a = [1, 2, 3, 4, 5] a.enumerateObjectsUsingBlock(Proc.new { |obj, index, stop| p obj stop.assign(true) if index == 2 }) Has anything changed since that sample code was posted? Thanks, Saul

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Bug Categorization
by Vladimir Chernis 07 Dec '10

07 Dec '10

I remember reading something about categorizing bugs by difficulty so that new hackers can start with something easy to get going. Did this happen at the Bug Smash? I would be really interested in a list of "starter bugs," since it's difficult for me to pick out the easy ones from trac right now. -- Vlad

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XCode Templates For MacRuby Not Showing Up
by Jeff Hemmelgarn 07 Dec '10

07 Dec '10

Hello! Being an old POSIX/C hack, I usually do my MacRuby coding with MacVim. While trying to look into a bug during the bug mash I found that I didn't have all of the MacRuby templates available in XCode. The only one I see is a system plugin for the MacRuby preference pane plugin. Any suggestions for how to get this working correctly? Jeff H.

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bug smash recap
by Laurent Sansonetti 06 Dec '10

06 Dec '10

A short recap regarding tomorrow's bug smash! The bug smash will happen Saturday 4th on IRC, network freenode (the main server seems to be chat.freenode.net) channel #macruby. The goal of this event is to triage all the bugs into 2 categories: for 1.0 and for Later. Then, making sure all the 1.0 bugs have proper reductions attached. It's going to be a boring job but it needs to be done. If you have any question regarding MacRuby's development or internals, feel free to also stop by and ask it there. We may not yet have a list of easy bugs to give to new hackers, but we can still answer questions and give pointers to the source code. We assume that after triaging all the bugs, we will have a good list of bugs we can give to new hackers, in further bug smash events. As we found out yesterday, it's impossible to sync up for a long time people living in US, Europe and Japan :) I will be online tonight and tomorrow from noon to midnight (US west coast time). Other contributors have different schedules but I think there should always be someone in the channel. Here is the workflow I have in mind for bug triaging. Instead of adding a new field to trac, I was thinking of re-using the milestone field. I just added 2 new milestones: "MacRuby 1.0" and "MacRuby Later". I propose that we set the milestone of each ticket to either one of those. Once a ticket is set to the "MacRuby 1.0" milestone, we can hack on it. Once it's fixed in trunk, we can move the milestone to the upcoming MacRuby one (such as "MacRuby 0.8", currently), then close it. When a bug is properly reduced to a simple test case (if applicable), the #reduction keyword can be attached to the ticket. As an example, let's say we have this ticket we want to get fixed for 1.0. We set the milestone to "MacRuby 1.0". A few days later, someone comes up with a good bug reduction, he attaches it to the ticket and the #reduction keyword. A few days later, someone finds a good fix, he commits it to trunk, then set the milestone to "MacRuby 0.8" then close the ticket. Thoughts? Laurent

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Segmentation fault
by Robert Rice 06 Dec '10

06 Dec '10

Would it be possible to catch this error rather than allowing MacRuby to crash with a Segmentation fault: Last login: Mon Dec 6 11:05:14 on console new-host:~ robertrice$ macirb irb(main):001:0> nil.alloc.init Segmentation fault new-host:~ robertrice$ Thanks, Bob Rice

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warning when using RVM and MacRuby and Rubygems
by Matt Aimonetti 06 Dec '10

06 Dec '10

RVM http://rvm.beginrescueend.com/ is a great tool to run multiple isolated Rubies on your machine. I personally use it to manage my CRubies and various gemsets. However, last night I had some problems due to the way rvm works and the way I was using it so I figured I should share it with the list. I don't use rvm for MacRuby, I use the nightly builds or compile from source. Last night I was debugging Rubygems and noticed something really weird about the gems Rubygems thought it had installed. Turned out that I had set my terminal tab to use rvm with Ruby 1.9.2. Rvm automatically changes the gem path environment variable and even though I was using macgem, rvm hack was affecting my macruby setup. I had to switch back to the default Ruby ($ rvm use system) o go back to the normal behavior and get macgem to see the proper macruby gem path. This is really a small thing since hopefully you don't have rvm set with a default ruby than the system's and that you open new terminal tabs to run MacRuby scripts. Still, it's good to know about this behavior in case you encounter the same weird behavior I did last night. - Matt

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PDFKit status?
by Yasu Imao 06 Dec '10

06 Dec '10

Hi, I'm wondering what the status of using PDFKit in MacRuby. Should it be fully usable now? I encountered a possible bug. framework 'cocoa' framework 'Quartz' path = <whatever the path to a pdf file> pdfDoc = PDFDocument.alloc.initWithURL(NSURL.fileURLWithPath(path)) selections = pdfDoc.findString("the",withOptions:NSCaseInsensitiveSearch) selections.each do |selection| p selection.string end => NSInvalidArgumentException: -[CPCharacterIndex count]: unrecognized selector sent to instance 0x200915a80 (RuntimeError Error) The PDF I used is an academic journal article PDF with about 12000 words. This occurred at different positions in the PDF file every time. Sometimes this happens earlier in the loop and sometimes later. This did run a few times without error (rarely, though). Whether or not to add .string didn't matter. The same process works without any problem with RubyCocoa. Best, Yasu

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macirb malloc error
by Robert Rice 05 Dec '10

05 Dec '10

I got this error using macirb but I couldn't reproduce it. Last login: Fri Dec 3 12:40:15 on ttys000 new-host:~ robertrice$ macirb irb(main):001:0> Deg_To_Rad = Math::PI / 180.0 => 0.0174532925199433 irb(main):002:0> Median_Radius_Feet= 20902221.0 => 20902221.0 irb(main):003:0> Median_Rad_Miles = Median_Radius_Feet / 5280.0 * Deg_To_Rad => 69.0932911798298 irb(main):004:0> Median_Rad_Miles = Median_Radius_Feet / 5280.0 / Deg_To_Rad unknown: warning: already initialized constant Median_Rad_Miles => 226819.895028356 irb(main):005:0> 50.0 / Median_Rad_Miles => 0.000220439216735151 irb(main):006:0> x = 50.0 / Median_Rad_Miles => 0.000220439216735151 irb(main):007:0> x * 60.0 macruby(3764,0x7fff7049bca0) malloc: *** free() called with 0x103dcbc60 with refcount 0 macruby(3764,0x7fff7049bca0) malloc: *** auto malloc[3764]: agc error for object 0x103dcbc60: Deallocating a non-block NameError: undefined local variable or method `ￂ' for main:TopLevel irb(main):008:0> Bob Rice

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Re: [MacRuby-devel] converging for 1.0
by russell muetzelfeldt 04 Dec '10

04 Dec '10

> From: Caio Chassot <lists(a)caiochassot.com> > On 2010-12-01, at 07:45 , denny trebbin wrote: >> >> GitHub or BitBucket (I love Mercurial, its pretty much easier then Git, IMO) doesn't really matter but I think a switch to almost newer source control system will stop by the use of Xcode. Because Xcode is crappy and supports not distributed source control system.I switched from Java to Ruby and thanks to MacRuby I tried Xcode but hell I can understand how people are able to write code with Xcode ;-)Anyways anything is better then SVN > > How much can we talk about Xcode 4 wrt SCM integration? mention of the git support in Xcode 4 is on a no login required page at apple, so I guess that feature is considered "public" now... http://developer.apple.com/technologies/tools/whats-new.html#version-editor cheers Russell ----- Russell Muetzelfeldt <russm(a)slofith.org> Mundus vult decipi, ergo decipiatur.

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Re: [MacRuby-devel] converging for 1.0
by russell muetzelfeldt 04 Dec '10

04 Dec '10

> From: denny trebbin <dra_k_oon(a)yahoo.com> > > Can you download XC4 without paying 99$ ?My none paid account allows me only to download XC3 :-) not yet - Xcode 4 is still in "developer preview" releases, and only available to paying dev. program members. once it's finalised it'll (I assume) be free for download just like Xcode 3 is right now. cheers Russell

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