Hi Thibault, it's actually me who wrote the tutorial, and Emil who gave me 
really solid feedback on some required steps I managed to miss out first time 
round.

I've done what you've recommended and changed the example irb session to use 
simple-prompt mode.  It's now pushed to 
http://github.com/nickludlam/macruby_website/tree/bundle-tutorial and awaiting 
a merge from Matt.

Nick

On 23 Aug 2010, at 18:58, Thibault Martin-Lagardette wrote:

> Hi Emil!
> 
> That's very awesome work, thanks for the dedication of making a tutorial!
> 
> I would simply want to add, maybe you should launch macirb with 
> --simple-prompt, it makes the output a little nicer and clearer I think (at 
> least for that kind of examples where line numbers are not really needed).
> 
> Thank you again!
> -- 
> Thibault Martin-Lagardette
> 
> 
> 
> On Aug 22, 2010, at 12:46, Nick Ludlam wrote:
> 
>> 
>> Fantastic feedback, thanks again. I've included comments inline below, and 
>> I've updated the preview at 
>> http://recoil.org/~nick/macruby/documentation/realworld-dynamic-bundles.h
>> 
>> On 20 Aug 2010, at 14:51, Emil Tin wrote:
>> 
>>> progress!
>>> I downloaded your project, and it builds without problems. Comparing them I 
>>> found out that:
>>> 
>>> 1. my project was missing the 'Copy Headers' build phase.
>> 
>> You're right, I've added this into the text.
>> 
>> 
>>> 2. after adding a 'copy headers' phase, and using the get info.. then 
>>> checkbox method to add headers files from the taglib target to the 
>>> taglibbundle target, it still couldn't build because my project had 
>>> list.tcc and tmap.tcc in the 'compile sources' build phase. for some 
>>> reason, it seems that when i use 'get info' method, files with the .tcc 
>>> extension are added to the 'compile source' phase isntead of the 'copy 
>>> headers' phase.
>> 
>> Yeah it seems XCode gets confused with that suffix. I've simplified the 
>> method of cloning the header and source settings by getting the reader to 
>> drag and drop the files from the existing folders directly into the new.
>> 
>> 
>>> after moving the two .tcc files to the 'copy headers phase', my project 
>>> builds. moving on i found.
>>> 
>>> 
>>> 3.  TagLib.h needs #import <Cocoa/Cocoa.h>
>> 
>> Linking to <Foundation/Foundation.h> should be all thats needed, but the 
>> template uses Cocoa, so I'll add a step to edit this from Cocoa to 
>> Foundation.
>> 
>> 
>>> 4. TagLib.m needs #import "tag_c.h"
>> 
>> Correct, and fixed!
>> 
>> 
>>> 5. the copy script at the end failed. the reason was i copied it from the 
>>> webpage, which had a line break. you might add a "\" to the code at the 
>>> webapge:
>>> 
>>> cp -v "${TARGET_BUILD_DIR}/${EXECUTABLE_PATH}" \
>>> "${SOURCE_ROOT}/${FULL_PRODUCT_NAME}"
>> 
>> I've now added the backslash to help with the line wrapping.
>> 
>> 
>>> 6. i need to require the full path to the bundle (or modify load paths). 
>>> simply using require 'TagLibBundle' fails even if i'm inside the folder the 
>>> bundle is?
>> 
>> I think this is because I missed a step where you give the project the 
>> '.bundle' suffix, so you end up with a 'TagLibBundle.bundle' filename. I've 
>> added it to the tutorial text. 
>> 
>> 
>>> 7. it works! i can use test.tags[:title] and get the title af an mp3.
>>> 
>>> 8. if i call test.tags i get a segmentation fault:
>>> 
>>> ~/Desktop/MacRuby/TagLib.framework$ macirb
>>> Couldn't load Wirble: no such file to load -- wirble
>>> irb(main):001:0> require 
>>> '/Users/emiltin/Desktop/MacRuby/TagLib.framework/TagLibBundle.bundle'
>>> => true
>>> irb(main):002:0> test = 
>>> TagLib.alloc.initWithFileAtPath("/Users/emiltin/Music/Elysium\ 
>>> etc/Celestial_Sounds_and_Tribal_Beats_mp3/05.Wisdom.mp3")
>>> => #<TagLib:0x200031f40>
>>> irb(main):003:0> test.tags[:title]=> "Wisdom"
>>> irb(main):004:0> test.tagsSegmentation fault
>> 
>> Ok this is a weird one, and I think related to reference counting and 
>> release pools. I've now altered the way the wrapper works, and it now uses 
>> discreet ivars and getters instead of a dictionary, which is a little more 
>> verbose, but nicer from the Ruby side of things.
>> 
>> 
>>> 
>>> On 20/08/2010, at 14.42, Nick Ludlam wrote:
>>> 
>>>> Thanks very much Emil. I'll go through the points:
>>>> 
>>>> 1. Good catch. I'll replace this with 'curl' since it's part of the base 
>>>> system. 
>>>> 
>>>> 2. I'll describe this step in a little more detail, perhaps with a 
>>>> screenshot. There is a reasonable familiarity with XCode that's assumed, 
>>>> though.
>>>> 
>>>> 3. I suspect this is related to build setting change that I may have 
>>>> missed out. If you have time, could you grab the project from 
>>>> http://github.com/nickludlam/TagLib.framework and try compiling ?
>>>> 
>>>> 
>>>> Nick
>>>> 
>>>> 
>>>> On 20 Aug 2010, at 12:42, Emil Tin wrote:
>>>> 
>>>>> 
>>>>> nice tutorials!
>>>>> 
>>>>> i tried following the tutorial but ran into a few problems:
>>>>> 
>>>>> 1.
>>>>> wget command was not found. wget is not installed by default in os x, it 
>>>>> seems.
>>>>> 
>>>>> 2.
>>>>> linking agains foundation and libz: as an xcode beginner, i had to guess 
>>>>> a bit to figure out how to do this. i suppose you mean adding items in 
>>>>> the 'linked libraries' area of the taglibbundle target info pane. maybe 
>>>>> describe in a sentence the simple steps involved.
>>>>> 
>>>>> 3.
>>>>> can't compile. when i try to build the project, i get a lot of errors. 
>>>>> here's the first:
>>>>> 
>>>>> 
>>>>> CompileC 
>>>>> /Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/Objects-normal/x86_64/tlist.o
>>>>>  taglib-src/taglib/toolkit/tlist.tcc normal x86_64 c++ 
>>>>> com.apple.compilers.gcc.4_2
>>>>> cd /Users/emiltin/Desktop/MacRuby/TagLib.framework
>>>>> setenv LANG en_US.US-ASCII
>>>>> /Developer/usr/bin/gcc-4.2 -x c++ -arch x86_64 -fmessage-length=0 -pipe 
>>>>> -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type 
>>>>> -Wunused-variable -DHAVE_CONFIG_H -isysroot 
>>>>> /Developer/SDKs/MacOSX10.6.sdk -mfix-and-continue 
>>>>> -fvisibility-inlines-hidden -mmacosx-version-min=10.6 -gdwarf-2 -iquote 
>>>>> /Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/TagLibBundle-generated-files.hmap
>>>>>  
>>>>> -I/Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/TagLibBundle-own-target-headers.hmap
>>>>>  
>>>>> -I/Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/TagLibBundle-all-target-headers.hmap
>>>>>  -iquote 
>>>>> /Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/TagLibBundle-project-headers.hmap
>>>>>  -F/Users/emiltin/Desktop/builds/Debug 
>>>>> -I/Users/emiltin/Desktop/builds/Debug/include 
>>>>> -I/Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/DerivedSources/x86_64
>>>>>  
>>>>> -I/Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/DerivedSour
 c
> e
>> s 
>>>> -c 
>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc
>>>>  -o 
>>>> /Users/emiltin/Desktop/builds/TagLib.build/Debug/TagLibBundle.build/Objects-normal/x86_64/tlist.o
>>>>> 
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:42:
>>>>>  error: expected class-name before '{' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:51:
>>>>>  error: 'List' is not a template
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:51:
>>>>>  error: 'List' has not been declared
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:51:
>>>>>  error: expected unqualified-id before ':' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:66:
>>>>>  error: 'List' is not a template
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:66:
>>>>>  error: 'List' has not been declared
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:66:
>>>>>  error: expected unqualified-id before '<' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:90:
>>>>>  error: expected constructor, destructor, or type conversion before '<' 
>>>>> token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:96:
>>>>>  error: expected constructor, destructor, or type conversion before '<' 
>>>>> token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:102:
>>>>>  error: expected constructor, destructor, or type conversion before '<' 
>>>>> token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:109:
>>>>>  error: expected nested-name-specifier before 'List'
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:109:
>>>>>  error: expected initializer before '<' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:116:
>>>>>  error: expected nested-name-specifier before 'List'
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:116:
>>>>>  error: expected initializer before '<' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:122:
>>>>>  error: expected nested-name-specifier before 'List'
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:122:
>>>>>  error: expected initializer before '<' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:129:
>>>>>  error: expected nested-name-specifier before 'List'
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:129:
>>>>>  error: expected initializer before '<' token
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:135:
>>>>>  error: expected nested-name-specifier before 'List'
>>>>> /Users/emiltin/Desktop/MacRuby/TagLib.framework/taglib-src/taglib/toolkit/tlist.tcc:135:
>>>>>  error: expected initializer before '<' token
>>>>> .....
>>>>> 
>>>>> 
>>>>> i'm using taglib 1.6.3, os x 10.6.4 and xcode 3.2.3
>>>>> 
>>>>> I'm not very experienced with xcode, and not sure what to do next. i 
>>>>> followed the steps you described wtih setting up xcode build settings, 
>>>>> etc. it seems the header files is somehow not included correctly?
>>>>> 
>>>>> thanks,
>>>>> emil
>>>>> 
>>>>> 
>>>>> On 19/08/2010, at 19.12, Nick Ludlam wrote:
>>>>> 
>>>>>> I've written up a first draft of a tutorial on taking C/C++, wrapping 
>>>>>> the code in a simple Obj-C class, then exporting this as a bundle which 
>>>>>> can be loaded by MacRuby. In this case, it's about wrapping the 
>>>>>> open-source TagLib library in order to extract ID3 tags from mp3 files.
>>>>>> 
>>>>>> If people have the time, I'd really appreciate any feedback on things 
>>>>>> like length, clarity, and accuracy of describing steps in XCode etc etc. 
>>>>>> 
>>>>>> http://recoil.org/~nick/macruby/documentation/realworld-dynamic-bundles.html
>>>>>> 
>>>>>> 
>>>>>> Thanks,
>>>>>> Nick
>>>>>> 
>>>>>> _______________________________________________
>>>>>> MacRuby-devel mailing list
>>>>>> MacRuby-devel@lists.macosforge.org
>>>>>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>>>>> 
>>>>> _______________________________________________
>>>>> MacRuby-devel mailing list
>>>>> MacRuby-devel@lists.macosforge.org
>>>>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>>>> 
>>>> _______________________________________________
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>>>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>>> 
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>> 
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