February 2009 - MacRuby-devel - lists.macosforge.org

Who wants to install gems anyways?! Introducing MicroGem
by Eloy Duran 11 Feb '09

11 Feb '09

Hi, As most people know installing gems on MacRuby still fails for most gems. I was getting so annoyed looking through the source of RubyGems that I decided to write a clean room implementation of it. For now it only does installing, but was the only goal since that's what fails on MacRuby. It might try to do more to replace RubyGems in the future, discussion/ patches are all welcome. For instance, I'm gonna use it do gem vendoring in Rucola. Anyways, to the real interesting part of this mail :-) I was actually gonna wait with a first release until MicroGem was able to bootstrap itself and install, but I haven't had time for that yet. So for now follow these instructions: Get source: $ git clone git://github.com/alloy/microgem.git $ cd microgem Install the remote gem: $ sudo env PRODUCTION=true macruby ./bin/µgem install alloy- microgem --simple --debug Then to install a gem: $ sudo macµgem install mocha --simple For more information see: http://github.com/alloy/microgem/tree/master Looking forward to reactions. Cheers, Eloy

7 9

Using 'Pointer.new_with_type'
by Michael Winterstein 10 Feb '09

10 Feb '09

Hi all, Is there a particular framework that's required in order to use 'Pointer.new_with_type'? I'm using the trunk (build 809) and it's apparently not available in either my Xcode project or in macirb. Is there an alternative method for working with pointers? My specific case is that I want to call the C function mkstemp. Is this what I should be doing? : @tmpfInfo += "/"+"resynch.fileinfo.XXXXXX" tmptr = Pointer.new_with_type('*') tmptr.assign(@tmpfInfo) fd_tmpInfo = mkstemp(tmptr) tmpInfoFileHandle = NSFileHandle.initWithFileDescriptor(@fd_tmpInfo) Michael

3 4

[MacRuby] #221: rb_objc_ocval_to_rval crashing when returning Modal Panel Return values
by MacRuby 06 Feb '09

06 Feb '09

#221: rb_objc_ocval_to_rval crashing when returning Modal Panel Return values -------------------------------------+-------------------------------------- Reporter: parzival@… | Owner: lsansonetti@… Type: defect | Status: new Priority: major | Milestone: Component: MacRuby | Keywords: -------------------------------------+-------------------------------------- My guess is that this is a problem in rb_objc_method_get_type, or in rb_objc_ocval_to_rval when dealing with objects of unknown type. It's causing my code to crash when trying to call the selector from an NSOpenPanel sheet. Here's a bit of the MacRuby code I'm working on: {{{ oPanel.beginSheetForDirectory(nil, file: nil, types: nil, modalForWindow: spWindow, modalDelegate: self, didEndSelector: "mediaSourceSheetDidEnd:returnCode:contextInfo:", contextInfo: nil) end # Delegate (from modal sheet) def mediaSourceSheetDidEnd(oPanel, returnCode: rCode, contextInfo: cInfo) p oPanel # <NSOpenPanel:0x1321300> p rCode # nil, but only if 'cancel' was selected p cInfo # nil end }}} Whenever a file is selected & 'Open' is pressed, it crashes with EXC_BAD_ACCESS. If 'Cancel' is pressed, it proceeds but rcode is nil. Here's the trace of the crash: {{{ Thread 1 (process 665 local thread 0x2d03): #0 0x002df287 in rb_objc_ocval_to_rval (ocval=0xbfffe0ac, octype=0xbfffdf4c "@", rbval=0xbfffdfcc) at objc.m:882 #1 0x002e48d6 in rb_ruby_to_objc_closure_handler_main (ctx=0x12) at objc.m:1546 #2 0x002e4bcb in rb_ruby_to_objc_closure_handler (cif=0x31d404, resp=0x31d404, args=0x31d404, userdata=0x31d404) at objc.m:1607 #3 0x911af424 in ffi_closure_SYSV () #4 0x92f0d2ae in -[NSSavePanel(NSSavePanelRuntime) _didEndSheet:returnCode:contextInfo:] () #5 0x92d15233 in -[NSApplication endSheet:returnCode:] () #6 0x92e5f7e1 in -[NSSavePanel(NSSavePanelRuntime) dismissWindow:] () #7 0x92e5f69d in -[NSSavePanel(NSSavePanelRuntime) ok:] () #8 0x92cd353b in -[NSApplication sendAction:to:from:] () #9 0x92cd3478 in -[NSControl sendAction:to:] () #10 0x92cd32fe in -[NSCell _sendActionFrom:] () #11 0x92cd2957 in -[NSCell trackMouse:inRect:ofView:untilMouseUp:] () #12 0x92cd21aa in -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] () #13 0x92cd1a64 in -[NSControl mouseDown:] () #14 0x92cd01a3 in -[NSWindow sendEvent:] () #15 0x92c9cd49 in -[NSApplication sendEvent:] () #16 0x92bfa69f in -[NSApplication run] () #17 0x92bc78a4 in NSApplicationMain () #18 0x911af1dd in .LCFI1 () #19 0x911af771 in ffi_call () #20 0x002e45f0 in rb_bsfunc_call (bs_func=0x93bc1a0, sym=0x92bc7666, argc=2, argv=0x690050) at objc.m:1967 #21 0x002d0b12 in vm_call_method (th=0x1013e50, cfp=0x70ff88, num=2, blockptr=0x1, flag=2145, id=<value temporarily unavailable, due to optimizations>, recv=16879904, klass=4267712, mcache=0x10a29c0) at vm_insnhelper.c:680 #22 0x002c552e in vm_eval (th=0x1013e50, initial=<value temporarily unavailable, due to optimizations>) at insns.def:1067 #23 0x002cbaab in vm_eval_body (th=0x1013e50) at vm.c:1032 #24 0x002cbd14 in rb_iseq_eval (iseqval=17439584) at vm.c:1236 #25 0x001f79d9 in ruby_exec_node (n=0x10a1b60, file=0x0) at eval.c:252 #26 0x001fa9d0 in ruby_run_node (n=0x10a1b60) at eval.c:280 #27 0x002de84b in macruby_main (path=0x1ff3 "rb_main.rb", argc=3, argv=0x4094a0) at objc.m:2834 #28 0x00001fed in main (argc=1, argv=0xbffff788) at /Users/parzival/devo/buried/sinker/main.m:13 Program received signal: “EXC_BAD_ACCESS”. }}} Examining memory in the debugger, I can see that the memory holding the args in rb_ruby_to_objc_closure_handler_main is as follows: 0xbfffe0a0: 01075510 093f5290 0134e070 00000001 00000000 The last three are the arguments to be converted in rb_objc_ocval_to_rval, and the problem comes on the second one (when i=1), which is the return code from the panel. It's being treated as type 'id', and then the crash comes when attempting to dereference it as a'Class *'. I can also add that *ocval = 0x40. The fact that NULL is treated as a special case in ocval_to_rval likely explains why it doesn't crash when 'Cancel' is selected, since NSCancelButton = 0 by definition. I haven't looked at rb_objc_method_get_type so I can't say for sure that's it, but I would expect that NSCancel & NSOK ought to come back as integers. Thinking about it a bit more, it may be that hard to know what type these ought to be since it's not declared. Is there a way to work that in to the beginSheet call? Substituting this function fails as well, however : {{{ def mediaSourceSheetDidEnd(oPanel, returnCode: rCode, contextInfo: cInfo) if rCode == NSCancelButton puts "Canceled." end if rCode == NSOKButton puts "OK!" end p oPanel p rCode p cInfo end }}} -- Ticket URL: <http://www.macruby.org/trac/ticket/221> MacRuby <http://macruby.org/>

1 2

presentation slides
by Matt Aimonetti 06 Feb '09

06 Feb '09

Tonight I presented MacRuby to the local San Diego Ruby group, here are the slides: http://www.slideshare.net/mattetti/macruby-when-objectivec-and-ruby-meet - Matt

1 0

Request for proposals for the first Ruby+Cocoa only conference.
by Eloy Duran 05 Feb '09

05 Feb '09

Hi, As some of you might already know, we are organizing a Ruby and Cocoa only conference in may in Amsterdam. This email is purely meant as a request for proposals, so we can work on the schedule. Once we have the details we will post an elaborate article about it on our blog. So please send your proposals or questions to me, or ping me (alloy) on IRC; #ruby-osx on freenode. The available time slots for talks range from 10 mins. to 45 mins. Cheers, Eloy

2 1

Framework callbacks in macirb
by Barry Walker 05 Feb '09

05 Feb '09

I'm clearly in over my head here, but I'm hoping macruby can simplify some complexity. I've cobbled together an objective c framework with a class that handles some IO Kit transactions. The framework seems to work with objective c cocoa applications. I would like to use this framework from macirb or a simple standalone ruby script. The framework appears to load from macirb and I can make an object and call it's methods. I can see packets sent out the FireWire port as expected. A key feature of the framework is accepting callbacks from IO kit. Certain FireWire packets on the bus should invoke method callbacks. The callbacks do not seem to make it to the objects created in macirb or a simple script. I'm researching run loops and threads and trying to understand if macirb or macruby uses NSApplication and its run loop, but I'm not getting very far and I may be way off base. Any advice or insight is appreciated. Hopefully I'm missing something simple, but if what I'm trying to achieve is extremly difficult or impossible it would be good to know that also. Regards, Barry

2 1

[MacRuby] #220: Ruby ranges should be usable whenever an NSRange is required
by MacRuby 04 Feb '09

04 Feb '09

#220: Ruby ranges should be usable whenever an NSRange is required ------------------------------------+--------------------------------------- Reporter: carl@… | Owner: lsansonetti@… Type: enhancement | Status: new Priority: major | Milestone: Component: MacRuby | Keywords: NSRange ranges ------------------------------------+--------------------------------------- It seems to me that any Objective-C method that requires an NSRange should be able to accept a ruby range. Also, NSRanges should be usable as ruby ranges (enumerable, to_a, etc..). -- Ticket URL: <http://www.macruby.org/trac/ticket/220> MacRuby <http://macruby.org/>

1 0

[MacRuby] #219: Feature: ObjC <=> Ruby Proxy interface
by MacRuby 04 Feb '09

04 Feb '09

#219: Feature: ObjC <=> Ruby Proxy interface -----------------------------------------+---------------------------------- Reporter: ash@… | Owner: lsansonetti@… Type: enhancement | Status: new Priority: blocker | Milestone: Component: MacRuby | Keywords: -----------------------------------------+---------------------------------- Working with MacRuby is nice, but I saw an interesting feature of another ruby project called Johnson. Its a javascript bridge for ruby, it literally ties Spidermonkey into the Ruby runtime and lets you do everything from run and parse html DOM and pass objects between Ruby's runtime and Javascripts runtime. My point is they have a proxy class that gives one the ability to pass objects between the environments. This kind of feature might be useful for MacRuby, if I could define my ruby class in ruby then pass it to an Objective C proxy then have an Objective C class call it, it would be kind of nice. Here is Johnson: http://github.com/jbarnette/johnson/tree/master and here is a presentation that talks about some of the things I am talking about: http://rubyconf2008.confreaks.com/how-i-learned-to-love- javascript.html they use Johnson to make a ruby object and pass it to javascript and vise- versa. I am not an Objective C expert so there might be something in Objective C that might prevent this but if you can dynamically create a class that's function calls just bounce from an Objective C caller to a proxy to their Ruby implementation and I know you can do the opposite in ruby. This might be unnecessary or not needed for MacRuby, but I could see this being very useful for prototyping things, plus if you could proxy other Objective C classes into ruby without much work. -- Ticket URL: <http://www.macruby.org/trac/ticket/219> MacRuby <http://macruby.org/>

1 2