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

[MacRuby] #434: MacRuby should use arc4random() rather than random()
by MacRuby 22 Dec '09

22 Dec '09

#434: MacRuby should use arc4random() rather than random() ---------------------------+------------------------------------------------ Reporter: jkh@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: security crypto ---------------------------+------------------------------------------------ Recent discussion in #433 pointed out a flaw in using rand(), leading to the more pertinent observation that anything wanting genuinely cryptographic randomness should use arc4random(). See man page for arc4random() for instructions on how to use it as a drop-in replacement for random() / srandom(). -- Ticket URL: <http://www.macruby.org/trac/ticket/434> MacRuby <http://macruby.org/>

1 3

dtrace and macruby
by Scott Thompson 21 Dec '09

21 Dec '09

I'm trying to learn a bit more about dtrace and I thought that using it to add probes to macruby would be fun. I pulled up the sample dtrace scripts from the Macruby 0.5 b2 source and was working with the script: class World def say(message) puts message end end world = World.new world.say('hello') (taken from http://redartisan.com/2008/5/18/dtrace-ruby) I tried to run the trace as: $ sudo dtrace -s methods_count.d -c "macruby world.rb" (where methods_count.d is one of the sample dtrace scripts) This doesn't produce any meaningful results. After playing around for a bit, I have learned that if I add a bit to the end of my ruby script: while(true) sleep 1 end What I take from that is if the ruby script runs for a longer time, dtrace has a chance plugging into the ruby application which it does not have when the script exits quickly. Am I doing something the wrong way? Is there a better way to ask dtrace to attach to my ruby application and catch information? Scott

4 4

macruby in automator shell
by B. Ohr 19 Dec '09

19 Dec '09

Hi, sometimes it´s fun „programming“ a workflow or a service with the automator (and some times not). Because there is no macruby cmd in the shell script section, I wrote this install script: # file: automator-macruby.rb # # extend the automator shell script configuration # by simply copying the ruby configuration to macruby # (must be executed with sudo) AUTOMATOR_SHELL_CONFIG = "/System/Library/Automator/Run Shell Script.action/Contents/Resources/Shells.plist" shell_config = NSDictionary.dictionaryWithContentsOfFile AUTOMATOR_SHELL_CONFIG raise "automator shell config file: not found" if shell_config.nil? ruby_path = `which ruby`.strip ruby_config = shell_config[ruby_path] raise "ruby configuration: not found" if ruby_config.nil? macruby_path = `which macruby`.strip shell_config[macruby_path] = ruby_config ok = shell_config.writeToFile(AUTOMATOR_SHELL_CONFIG, atomically:false) raise "automator shell config file: write error" if ok == 0

1 0

need review for macrubyc man-page
by Laurent Sansonetti 18 Dec '09

18 Dec '09

Hi guys, I just committed an early draft of the macrubyc man-page. Would be nice to have some feedback about it. I'm not good at writing English neither at documenting stuff :) Please let me know if you find English mistakes or if there is something you do not understand, or if something is missing. http://svn.macosforge.org/repository/ruby/MacRuby/trunk/rubyc.1 To view it: $ groff -Tascii -man rubyc.1 | more Thanks, Laurent

5 6

How to test if you're running MacRuby vs. Ruby?
by Paul Howson 18 Dec '09

18 Dec '09

Is there a way to test if code is running in MacRuby rather than Ruby? I'm developing and testing some code using plain old Ruby 1.8.7 in TextMate, then integrating it into an Xcode project, so I need to be able to "comment out" some lines which are Cocoa-dependent when testing in plain Ruby. Paul Howson

4 5

[MacRuby] #510: website: How Ruby Programmers Should Learn Cocoa
by MacRuby 17 Dec '09

17 Dec '09

#510: website: How Ruby Programmers Should Learn Cocoa ----------------------------------------+----------------------------------- Reporter: ernest.prabhakar@… | Owner: lsansonetti@… Type: task | Status: new Priority: minor | Milestone: Component: MacRuby | Keywords: ----------------------------------------+----------------------------------- [From the mailing list - someone should add to the docs] Brian Chapados wrote: If MacRuby is your first exposure to mac programming and all of the associated tools and techniques, starting out by jumping into an IB-based project that uses CoreData & Bindings is going to be really confusing. I'd break up the tasks into pieces small enough that you can actually understand what's going on. You shouldn't feel like things are happening "magically". If that is the case, then try to take a step back and figure out how the magic trick works. For example, if you want to tackle CoreData first, then start with just CoreData. Build a command-line program that creates a CoreData stack by reading in your compiled .xcdatamodel (or create the model in code!), add some data, and save it. Once you've got that working, then make it download data from your web service and save it. Here is the approach I would take: 1. If you haven't already, read through the Core Data Programming guide: http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/CoreD… At the very least, browse through this to get a feel for what's going on. You won't understand everything, but at least you'll have some sense of where to look when you get stuck. 2. Read the Core Data Utility tutorial: http://developer.apple.com/mac/library/documentation/cocoa/conceptual/CoreD… This gives you a basic Obj-C version of a program the uses CoreData entirely through the API. Everything is done in code, even creating the model, so it should get you started on something basic. 3. As it turns out, Matt Gallagher (cocoawithlove.com) recently posted an excellent article on parsing CSV files and importing the data into CoreData: http://cocoawithlove.com/2009/11/writing-parser-using-nsscanner- csv.html I highly recommend you also download and read through his code to see how it works. 4. Use the code from #2 & #3 to write a minimal implementation in MacRuby that imports data into your model. 5. After getting #4 to work, go back and read the section on efficiently importing data in the CoreData programming guide and refactor your import code appropriately. At least this way, if you get stuck on #4 & #5, you'll have a fairly short, self-contained example program that you can put in a gist, post a link, and ask for help on specific parts. _________________________________ And 6. Once you believe you understand how everything works, submit a sample code to us! :-) -- Ticket URL: <http://www.macruby.org/trac/ticket/510> MacRuby <http://macruby.org/>

1 3

Would a macruby-newbie List Be Worthwhile?
by s.ross 17 Dec '09

17 Dec '09

There are a number of questions I know I have coming from a Ruby/Rails and not a Cocoa background. These questions can be difficult to answer in the context of Objective-C (and heck, Ruby makes a lot of the Objective-C syntactic vinegar just go away). They are also not specifically about MacRuby, but rather about how it interacts with the framework. Because MacRuby can open up Cocoa to developers who really didn't want to mess around with [[obj alloc] init] and all that stuff. Many of you on this list did go through that learning experience but have already answered these same questions before in a different context but shouldn't be imposed upon to answer them again. Would a newbie list be worth creating? I find myself coming up with seemingly stupid questions that I simply don't want to trouble the list with but that take hours to dig out of the documentation. That would be the proposed purpose. Post some code, expected results, and what's actually happening. Maybe an example: I want a single pane Core Data application but I forgot to select the template that creates an appDelegate. How do I get a managedObject context and how do I add some seed data to that collection once it's bound to an NSTableView. See? Complicated n00b question that requires IB steps and Ruby steps. Takes quite a bit of trekking around in the documentation to figure out. But someone who's walked the same path before could answer it right away. Comments?

6 7

[MacRuby] #339: YAML error with UTF-16 string
by MacRuby 17 Dec '09

17 Dec '09

#339: YAML error with UTF-16 string ------------------------+--------------------------------------------------- Reporter: dev@… | Owner: lsansonetti@… Type: defect | Status: new Priority: critical | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: YAML encoding ------------------------+--------------------------------------------------- {{{ macruby -e 'require "yaml"; puts "Rübe".to_yaml' }}} produces {{{ --- ! "R\xFCb" }}} with the last character missing! BTW, I googled that "YAML streams must be UTF-8 or UTF-16", so why is a escape sequence visible in the above puts statement? -- Ticket URL: <http://www.macruby.org/trac/ticket/339> MacRuby <http://macruby.org/>

3 6

Is the git repo stuck?
by Jordan Breeding 16 Dec '09

16 Dec '09

The last change I see in the public git repo is r3101, but the svn repo shows up to r3124 for trunk, is the git repo stuck? Jordan

3 3

[MacRuby] #427: MacRuby 0.5 trunk fails to install (rake install)
by MacRuby 15 Dec '09

15 Dec '09

#427: MacRuby 0.5 trunk fails to install (rake install) -------------------------------+-------------------------------------------- Reporter: fonseka@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: -------------------------------+-------------------------------------------- Hi! I've been trying to compile the Git head for the last days and can't install it. When I do "sudo rake install" the process stops at the middle, with this message: {{{ ./miniruby instruby.rb --make="/usr/bin/make" --dest-dir="" --extout=".ext" --mflags="" --make-flags="" --data-mode=0644 --prog- mode=0755 --installed-list .installed.list --mantype="doc" --sym-dest- dir="/usr/local" --rdoc-output="doc" installing rdoc rake aborted! }}} Running from gdb I got the following trace: {{{ Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000000033459a8f 0x00007fff858557e7 in libunwind::CFI_Parser<libunwind::LocalAddressSpace>::parseCIE () (gdb) bt #0 0x00007fff858557e7 in libunwind::CFI_Parser<libunwind::LocalAddressSpace>::parseCIE () #1 0x00007fff85856295 in libunwind::CFI_Parser<libunwind::LocalAddressSpace>::decodeFDE () #2 0x00007fff8575d428 in libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::setInfoBasedOnIPRegister () #3 0x00007fff8575de48 in libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::step () #4 0x00007fff85782bd8 in _Unwind_RaiseException () #5 0x00007fff80926bef in __cxa_throw () #6 0x00007fff801b23b2 in objc_exception_throw () #7 0x0000000100176475 in rb_vm_raise (exception=<value temporarily unavailable, due to optimizations>) at vm.cpp:3094 #8 0x000000010003cf89 in rb_exc_raise (mesg=<value temporarily unavailable, due to optimizations>) at eval.c:313 #9 0x000000010003afd1 in rb_sys_fail (mesg=0x20027dca1 "/Library/Frameworks/MacRuby.framework/Versions/0.5/usr/share/ri/1.9.0/system") at error.c:1177 #10 0x000000010009e513 in dir_s_mkdir (Obj=<value temporarily unavailable, due to optimizations>, sel=<value temporarily unavailable, due to optimizations>, argc=<value temporarily unavailable, due to optimizations>, argv=<value temporarily unavailable, due to optimizations>) at dir.c:848 #11 0x0000000100168b2f in rb_vm_dispatch (cache=0x1048d8f40, top=8590052928, self=8590410496, sel=0x100fbb160, block=0x0, opt=0 '\0', argc=2) at dispatcher.cpp:415 #12 0x000000010111759d in ?? () #13 0x000000010116db6a in ?? () #14 0x0000000100014c8b in rb_ary_each_imp (ary=8590052928, sel=<value temporarily unavailable, due to optimizations>) at ruby.h:1036 #15 0x0000000100168fcb in rb_vm_dispatch (cache=0x100f2b940, top=8590052928, self=8592619872, sel=0x100f2b850, block=0x200289ee0, opt=0 '\0', argc=<value temporarily unavailable, due to optimizations>) at dispatcher.cpp:131 #16 0x0000000101116f07 in ?? () #17 0x0000000101168b19 in ?? () #18 0x0000000101104491 in ?? () #19 0x0000000101100010 in ?? () Previous frame inner to this frame (gdb could not unwind past this frame) }}} -- Ticket URL: <http://www.macruby.org/trac/ticket/427> MacRuby <http://macruby.org/>

1 8