March 2011 - MacRuby-devel - lists.macosforge.org

Concurrency bug in ControlTower
by Charles Oliver Nutter 23 Oct '11

23 Oct '11

Apologies reporting this here; I'm not sure where I should report bugs in ControlTower. I believe there's a bug in ControlTower around line 34: def open @status = :open while (@status == :open) connection = @socket.accept # << here @request_queue.async(@request_group) do The "connection" local variable is used in the async block below to parse the request and send the response. Unless MacRuby's blocks behave differently than regular Ruby, this variable is shared across all activations of that block. As a result, it's possible that two concurrent requests will end up using each others' connection, and usually just blowing up as a result. The fix I've come up with is to wrap the @request_queue.async call in a tap call: def open @status = :open while (@status == :open) conn = @socket.accept conn.tap do |connection| @request_queue.async(@request_group) do Since async can't accept any explicitly-passed state, this seems like the safest way to ensure the connection reference is not shared by separate invocations. I'm not sure if it's possible in GCD, but having async take an optional argument with explicitly-passed state might also be a good way to fix this. - Charlie

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macruby_deploy not embedding all of MacRuby
by Kevin Colyar 12 May '11

12 May '11

I'm running the following command to prepare my app to share with testers. PATH="$PATH:/usr/local/bin" macruby_deploy --embed --compile "$TARGET_BUILD_DIR/$PROJECT_NAME.app" On my machine, its says the app directory is ~25MB but testers get the following error when they try to run it: dyld: Library not loaded: @executable_path/../Frameworks/MacRuby.framework/Versions/0.10/usr/lib/libmacruby.dylib Referenced from: /Applications/ViKing.app/Contents/MacOS/ViKing Reason: no suitable image found. Did find: /Applications/ViKing.app/Contents/MacOS/../Frameworks/MacRuby.framework/Versions/0.10/usr/lib/libmacruby.dylib: unknown file type, first eight bytes: 0x6C 0x69 0x62 0x6D 0x61 0x63 0x72 0x75 /Applications/ViKing.app/Contents/MacOS/../Frameworks/MacRuby.framework/Versions/0.10/usr/lib/libmacruby.dylib: unknown file type, first eight bytes: 0x6C 0x69 0x62 0x6D 0x61 0x63 0x72 0x75 Trace/BPT trap When I upload the app directory to a remote server it's ~55MB and works only other's machines. I assume this is due to symbolic links. Has anyone else seen this or have a fix for it? Perhaps I'm missing a flag that I need to pass to macruby_deploy. Thanks, Kevin -- Kevin Colyar http://kevin.colyar.net

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Re: [MacRuby-devel] WWDC ?
by Rich Morin 08 Apr '11

08 Apr '11

Looking at http://www.sfruby.info/#upcoming, I don't see anything scheduled during WWDC (June 6-10). If the WWDC attendees in the crowd can settle on a date (ideally, one that works for Jordan and Laurent :-), I'll be happy to put in the schedule. I can probably also find a venue for the event; let me know if this is an issue... -r -- http://www.cfcl.com/rdm Rich Morin http://www.cfcl.com/rdm/resume rdm(a)cfcl.com http://www.cfcl.com/rdm/weblog +1 650-873-7841 Software system design, development, and documentation

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Tyro Needs Ruby vs. O-C Advice
by Bryan Harrison 07 Apr '11

07 Apr '11

I've decided to use an upcoming sabbatical to teach myself OS X and iOS programming. My background includes OS X systems administration and web development, mostly using the Apache/MySQL/PHP model. I'm familiar with OOP concepts and have trifled with any number of languages from C to AppleScript, but am not fluent in any object oriented language. I've been exploring Xcode 4 for a week and feel conversant with the IDE if not yet able to accomplish anything with it. So… I understand that Cocoa is a given, but today's million dollar question is Objective-C or MacRuby? I'm a blank slate with regard to both and so could use some good advice. For example… What are the advantages of MacRuby over Objective-C? What are the advantage of O-C over Ruby? Is Xcode's support for O-C significantly better than it's handling of Ruby? Do I care? At this point I'm primarily interested in OS X development, but iOS clearly needs to run a close second. What's the current status of Ruby development for iOS and is it likely to go anywhere in the nearish future? Any thoughts on the longer-term prospects of either language? Any thoughts from anybody will be much appreciated. Thanks, Bryan

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[ANN] TrackerBot 1.0 in App Store -- tested with MacRuby!
by Christian Niles 06 Apr '11

06 Apr '11

Hey All, One of the reasons I've gotten so in love with MacRuby is that it's let me BDD my Cocoa projects, in particular an app I just released to the App Store, called TrackerBot [1]. TrackerBot is an iPad and iPhone interface to Pivotal Tracker, the well-known agile project management tool [2]. While I can't run my MacRuby/RSpec2 specs on the actual device, I've ben able to move a majority of my code into an iPhone compatible framework that I do test with MacRuby. I'm beginning to use Frank for UI automation tests on the device and am developing a gem that tries to make all the XCode configuration and setup painless for new users who want to get started with MacRuby/XCode/Cocoa development. So, in addition to the release announcement, I just wanted to thank you all for making it possible to use all the Ruby BDD tools I love with Cocoa. It has made me far more productive, and the development far less frustrating. Thanks! christian. [1] http://vulpinelabs.com/trackerbot [2] http://www.pivotaltracker.com/

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Problem with latest macruby stable and unicode regexp
by Glenn Gillen 03 Apr '11

03 Apr '11

Hey all, This is my first foray into MacRuby dev so go easy :) I'm trying to make a fairly simple web editor with Haml and Sass parsing behind the scenes, and including Sass into my project throws the following error on build: regexp `[\u{80}-\u{D7FF}\u{E000}-\u{FFFD}\u{10000}-\u{10FFFF}]' compilation error: U_REGEX_BAD_ESCAPE_SEQUENCE (RegexpError) The offending line is here: https://github.com/nex3/sass/blob/master/lib/sass/scss/rx.rb#L55 Any ideas what I can do apart from forking Sass and opting for the 1.8 compatible regexp? Thanks, Glenn

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Re: [MacRuby-devel] MacRuby-devel Digest, Vol 37, Issue 51
by Jean-Denis Muys 31 Mar '11

31 Mar '11

On 31 mars 2011, at 05:56, <macruby-devel-request(a)lists.macosforge.org> Bryan Harrison <bryan(a)bryanharrison.com> wrote: > Message: 6 > Date: Wed, 30 Mar 2011 20:43:27 -0700 > From: Bryan Harrison <bryan(a)bryanharrison.com> > To: macruby-devel(a)lists.macosforge.org > Subject: [MacRuby-devel] Tyro Needs Ruby vs. O-C Advice > Message-ID: <F3D5A990-D053-45A7-91FC-E29FBD6DF66A(a)bryanharrison.com> > Content-Type: text/plain; charset="windows-1252" > > I've decided to use an upcoming sabbatical to teach myself OS X and iOS programming. My background includes OS X systems administration and web development, mostly using the Apache/MySQL/PHP model. I'm familiar with OOP concepts and have trifled with any number of languages from C to AppleScript, but am not fluent in any object oriented language. I've been exploring Xcode 4 for a week and feel conversant with the IDE if not yet able to accomplish anything with it. > > So? I understand that Cocoa is a given, but today's million dollar question is Objective-C or MacRuby? I'm a blank slate with regard to both and so could use some good advice. For example? > > What are the advantages of MacRuby over Objective-C? > > What are the advantage of O-C over Ruby? > > Is Xcode's support for O-C significantly better than it's handling of Ruby? Do I care? > > At this point I'm primarily interested in OS X development, but iOS clearly needs to run a close second. What's the current status of Ruby development for iOS and is it likely to go anywhere in the nearish future? > > Any thoughts on the longer-term prospects of either language? > > Any thoughts from anybody will be much appreciated. > > Thanks, > Bryan I will be blunt: stay away from MacRuby and go with Objective-C. Before I get burned at the stake on this list, let me explain why. This stems from an assumption I made from you question about your goal: Assumption: your goal is to become proficient in Cocoa [touch] programming as fast as possible, starting from basically zero. If that assumption is wrong, then the conclusion might be too. MacRuby is very good already, but it's a far less treaded route. As a result, you will have to load your brain with additional burden, always a difficult proposition when learning: - Less applicable resources for learning: less examples, less books, less blog posts, less people to help you out. - So you will need to translate every example and snippet from Objective-C to Ruby. This means you will effectively need to learn two languages instead of one at the same time, together with Cocoa. - You will need to translate every one of your question from Ruby to Objective-C when posting to stackoverflow or Apple's forum, or risk getting no answer. Sure you can stay in this list, but that's one less resource. - Every time you face a difficult roadblock, you will necessarily have to wonder "Is this me? Or is this MacRuby?". To answer that question for certain, you will then port your code to Objective-C to make sure. - You will face less understanding development tools. When you have an issue with them, the official answer will be "MacRuby development is not supported". With Xcode 4 being immature by itself, you probably don't want to add an immature MacRuby to the mix. Now the MacRuby journey might taste a lot better, depending on you. And if for you "the reward is the _journey_", you might consider it. On the practical details, what has been said still applies, with two small corrections: - You also have ahead of time compilation with MacRuby. But arguably, you don't care about that when learning. - The job market for iOS programming is thriving, and for Mac programming is getting a lot better. Sure, Ruby programmers are also in demand, but it's not clear to me which market is actually better. One thing is for sure: demand for iOS Ruby programmers is zero. Jean-Denis

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hotcocoa virus
by Vincenzo Piombo 31 Mar '11

31 Mar '11

Hi all, I was trying to add drag & drop capabilities to a hotcocoa program and stumbled into a problem that really puzzles me: a macruby program can freeze your mac ! I uploaded the buggy fragment here: https://gist.github.com/893300 Don't run it unless you are prepared to reboot your machine the hard way, don't even "Force quit" works. In the instructions I say to launch it twice, but every drag & drop with any app after the crash freezes the app. I'm using macruby 0.9, tried 0.10 but hotcocoa does not work with it (but this is another story !) Hope someone can tell me if I did something wrong or found a bug somewhere. Enzp

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RoxorReturnFromBlockException*
by Rob Gleeson 31 Mar '11

31 Mar '11

> > def trigger_action(sender) > a_proc = Proc.new { |var| > puts "hello in proc" > return 1 > } > a_proc.call('test') > puts "hello after proc" > end > That code runs without triggering an exception, and prints only "hello in proc" as expected. However, this variation on the code behaves differently: This shouldn't print "hello after proc". an explicit return should not return control to the caller within a method, it should return for that method. F. ex, 1 should be the return value of trigger_action. If it were a lambda, that behavior is expected (printing "hello after proc"), so I guess there's a bug somewhere. P.S: Gabriel, sorry, I replied to you directly instead of to the list :) - Rob

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How to do Drag and Drop
by Morgan Schweers 31 Mar '11

31 Mar '11

Greetings, On Wed, Mar 30, 2011 at 2:32 PM, Vincenzo Piombo <vipenzo(a)gmail.com> wrote: > By the way, do you know where can I find a working drag&drop macruby > example ? > > Enzo > Well...crud. My email on this got eaten because I used syntax highlighted code which bulked the email beyond the 40k limit on the mailing list. You can view my drag-and-drop answer here: https://docs.google.com/document/pub?id=1htdHAArZ0g0ooDiSdTJ89vUhUHmPoHJjls… Hopefully it helps... I should build it into a proper blog post and gists and stuff... -- Morgan Schweers, CyberFOX! On Wed, Mar 30, 2011 at 11:17 PM, Gary Weaver <gary.weaver(a)duke.edu> wrote: > >> Enzo, >> >> It might be a translation issue, but I wouldn't call that a virus (it >> doesn't replicate, it is just something that freezes your computer). I >> wouldn't call it "Virus" in the gist either, if I were you. >> >> If it is a bug in HotCocoa, than it may be a bug (or at least undesired >> functionality if it freezes your Mac) in MacRuby or OS X, so you might want >> to dig deeper and provide more info on version (and where you got it, since >> it is in various places in GitHub) of HotCocoa. >> >> Thanks! >> Gary >> >> >> On 3/29/11 5:27 PM, Vincenzo Piombo wrote: >> >> Hi all, >> I was trying to add drag & drop capabilities to a hotcocoa program and >> stumbled into a problem that really puzzles me: a macruby program can freeze >> your mac ! >> >> I uploaded the buggy fragment here: https://gist.github.com/893300 >> >> Don't run it unless you are prepared to reboot your machine the hard >> way, don't even "Force quit" works. >> In the instructions I say to launch it twice, but every drag & drop with >> any app after the crash freezes the app. >> >> >> I'm using macruby 0.9, tried 0.10 but hotcocoa does not work with it >> (but this is another story !) >> >> Hope someone can tell me if I did something wrong or found a bug >> somewhere. >> >> Enzp >> >> >> >> >> >> _______________________________________________ >> MacRuby-devel mailing list >> MacRuby-devel(a)lists.macosforge.org >> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel >> >> > > _______________________________________________ > MacRuby-devel mailing list > MacRuby-devel(a)lists.macosforge.org > http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel > >

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