May 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 and nokogiri - LoadError on some mac
by Francis Chong 14 Oct '11

14 Oct '11

Hi I tried to use macruby_deploy to embed my macruby based mac app with gems (/usr/local/bin/macruby_deploy --compile --embed --gem nokogiri) The resulting app run fine on my machine. However, on many of our testers, the app failed with "LoadError". It seems nokogiri depends on a libiconv with different version. (nokogiri.bundle requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0) We cant ask our user to install each of those library. Are there any way I can build the app embed the correct version of libiconv? Logs: dlopen(/Applications/ChineseIdiom.app/Contents/Frameworks/MacRuby.framework/Versions/0.10/usr/lib/ruby/site_ruby/1.9.2/nokogiri/nokogiri.bundle, 9): Library not loaded: /opt/local/lib/libiconv.2.dylib 18/05/2011 10:44:53 PM [0x0-0x157b57a].hk.ignition.mac.ChineseIdiom[1576] Referenced from: /Applications/ChineseIdiom.app/Contents/Frameworks/MacRuby.framework/Versions/0.10/usr/lib/ruby/site_ruby/1.9.2/nokogiri/nokogiri.bundle 18/05/2011 10:44:53 PM [0x0-0x157b57a].hk.ignition.mac.ChineseIdiom[1576] Reason: Incompatible library version: nokogiri.bundle requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0 - /Applications/ChineseIdiom.app/Contents/Frameworks/MacRuby.framework/Versions/0.10/usr/lib/ruby/site_ruby/1.9.2/nokogiri/nokogiri.bundle (LoadError) 18/05/2011 10:44:53 PM [0x0-0x157b57a].hk.ignition.mac.ChineseIdiom[1576] from /Applications/ChineseIdiom.app/Contents/Resources/rb_main.rb:20:in `<main>' 18/05/2011 10:44:53 PM com.apple.launchd.peruser.501[191] ([0x0-0x157b57a].hk.ignition.mac.ChineseIdiom[1576]) Exited with exit code: 1 Thanks Francis Chong Ignition Soft http://ignition.hk

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MacRuby WWDC Meetup
by Christian Niles 07 Jun '11

07 Jun '11

Hey Everyone! WWDC is getting close and I wanted to make sure the MacRuby community has a chance to get together while everyone's in town. If you're going to be in town and want to join us, please RSVP here: http://macrubymeetup.eventbrite.com/ Right now I have Erik Michaels-Ober and Laurent Sansonetti on board to give some brief presentations. If anyone else feels like presenting a topic or a project, let me know. Also, please help out and publicize this event. Attendance is limited to 50 people, and it'd be nice to have a full house. christian.

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Nokogiri leaks
by Guido Soranzio 29 May '11

29 May '11

While experimenting with array controllers and NSTableViews, I was facing huge memory leaks. I thought the culprits were the Cocoa bindings but I have discovered that the Nokogiri gem is what is causing them. The following little test doesn't leak under Ruby 1.9.2 compiled with MacPorts, so it seems there is a problem with the underlying linking with libxml2 instead. -------------------------------------------------------------- require 'rubygems' require 'nokogiri' loop do doc = Nokogiri::HTML('<html><body><p>TEST </p></body></html>') p = doc.css("p")[0].text print p end -------------------------------------------------------------- -- Guido

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Can't run ack subprocess
by Majd Taby 28 May '11

28 May '11

Hey there, I'm trying to build a gui around the ack (betterthangrep.com) utility. I've built this before, and it worked great (macruby 0.7) but now I can't seem to get it to run. I was wondering if you could help me figure it out. https://gist.github.com/997085 In that gist, you'll find the code I'm using as well as the output generated. Interesting thing is, if I run that sequence of commands manually, it generates the expected output. If you need more information from me, let me know. - Majd

1 0

How do we center label text?
by azzzz＠gmx.net 27 May '11

27 May '11

Couple of quick questions I hope someone can help with. 1. How do we center text in labels? I have a text label, and it is set to blank (text deleted via interface builder) but when the text comes in I'd like it to center, any ideas how to do it? I'm setting my label via self.label.stringValue. I've googled and tried this but it doesn't seem to work: self.label.textAlignment = UITextAlignmentCenter 2. Is it possible to add images to the window (via interface builder - this bit I can do) but set them to hide and then only show them if I need to via my ruby code? Once I make the connection to an image how would I do that? Sorry to be a pita - hope someone can help. Cheers.

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Dynamic refresh in a view - xcode 4 / MacRuby
by azzzz＠gmx.net 26 May '11

26 May '11

I have a label that I have set to blank, and after a user clicks 'go' I generate a random word or number and use: self.label.stringValue = "some_word" to update the view. However, I would like to show 200 or so random words in quick succession before the final one is shown - just because it's too plain at the moment. Alternatively, I'd be happy with showing an animated graphic in its place - which is replaced by the final random word after a few seconds. I've tried things like: 100.times do num = rand(40) self.label.stringValue = num sleep 1 end But it doesn't work. I've also (after googling) tried .reloadData but to no avail as well. Any ideas on how to achieve this? Or pointers on how to add animations to my window/views?

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Break in Block Fails only in Macruby
by Shannon Love 25 May '11

25 May '11

Greetings, If I run the following under the system ruby 1.8.7: require 'find' starting_directory="/Users/developer/Desktop/Top" file_name_I_want_to_find="target_file.txt" path=Find.find(starting_directory) {|p| break p if p.include?(file_name_I_want_to_find) } puts "path = #{path}" ... I get the expected output: path = /Users/developer/Desktop/Top/Lev_1-2/Lev_2.1/target_file.txt However, if I run it under Macruby I get nothing, just: path = I'm running MacRuby 0.10 (ruby 1.9.2) [universal-darwin10.0, x86_64] on 10.6.7 Not sure what is going on. Thanks, Shannon

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Constant definitions
by Robert Rice 25 May '11

25 May '11

Hi Fans: What changed on 5/19/2011? I haven't been able to use the nightly builds since 5/18/2011. Constant definitions stopped working and I get an uninitialized constant xxx (NameError) message wherever my code tries to reference a constant defined in the same class. Thanks, Bob Rice

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How do I add a background image in xcode4/macruby
by azzzz＠gmx.net 24 May '11

24 May '11

Hi All - I'm new to MacRuby so please be gentle! I am trying to add a background image to my app. I drag an 'image view' over to the window, but none of the options in any of the utilities drawers allows me to specify an image (which is what seems I need to do - according to various youtube vids... although they are for the iphone). I'd also like to set a splash screen - again have watched youtube videos but they all seem to be for the iPhone (and so adding a 'Default.png' image and 'sleep 5' doesn't work). Any help appreciate - and sorry to be such a nube.

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