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Top Forums UNIX for Dummies Questions & Answers What Makes an App the System Default? Post 302770436 by sudon't on Friday 15th of February 2013 09:07:01 PM
Old 02-15-2013
What Makes an App the System Default?

Hi!
I'm not sure how, (or if), Apple updates stuff in the standard unix installation of OS X, but whenever I have occasion to check a version number of something in my standard install, it is outdated. Normally, I will then install the newer version via ports, which usually becomes the default. Being a long-time Mac user, I am used to these things happening automagically, and I don't always give it much thought.
But today, I wanted to install a little Scrabble Solver script I found, and it required ruby 1.9.2, or better. I checked my version in /bin, and found I had 1.8, so I installed ruby19 via ports. Then I tried to install the script.
Code:
$ sudo gem install scrabble-solver
ERROR:  Error installing scrabble-solver:
	scrabble-solver requires Ruby version >= 1.9.2

$ which ruby
/usr/bin/ruby

$ ls -l /opt/local/bin/ |grep ruby
-rwxr-xr-x   1 root  admin     9024 Feb  6 11:21 ruby1.9
$

Why didn't ruby 1.9 become the default? How does the system determine which app is the default? I used to think it simply accepted the first one it came across in my PATH, but clearly that is not the case.
Code:
$ echo $PATH
/opt/local/bin:/opt/local/sbin:/Library/Frameworks/Python.framework/Versions/3.2/bin:/opt/local/bin:/opt/local/sbin:/sw/bin:/sw/sbin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/MacGPG2/bin:/usr/X11/bin

I haven't had occasion to invoke ruby myself, but I suppose other stuff uses it. Is there any reason I couldn't just set an alias to ruby 19 in my bash config? Would that solve the problem in terms of installing this script?
TIA!
 

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Mac::AETE::App(3)					User Contributed Perl Documentation					 Mac::AETE::App(3)

NAME
Mac::AETE::App - reads the Macintosh Apple event dictionary from an application. SYNOPSIS
use Mac::AETE::App; use Mac::AETE::Format::Dictionary; $app = App->new("My Application"); $formatter = Dictionary->new; $app->set_format($formatter); $app->read; $app->write; DESCRIPTION
The App module simplifies reading the Apple event dictionary from an application. It will launch the application if necessary to obtain the dictionary. Methods new Example: ($name is the name of the application.) use Mac::AETE::App; use Mac::AETE::Format::Dictionary; $app = App->new($aete_handle, $name); read (Inherited from Mac::AETE::Parser.) Reads the data contained in the AETE resource or handle. Example: $app->read; set_format (Inherited from Mac::AETE::Parser.) Sets the output formatter used during by the 'write' subroutine. Example: $formatter = Dictionary->new; $app->set_format($formatter); copy (Inherited from Mac::AETE::Parser.) Copies all suites from one Parser object into another. Example: $aete2 = Parser->new($aete_handle2, $another_name); $app->copy($aete2); copies the suites from $aete2 into $aete. merge (Inherited from Mac::AETE::Parser.) Merges suites from one Parser object into another. Only the suites that exist in both objects will be replaced. Example: $aete3 = Parser->new($aete_handle2, $another_name); $app->merge($aete3); write (Inherited from Mac::AETE::Parser.) Prints the contents of the AETE or AEUT resource using the current formatter. $app->write; INHERITANCE
Inherits from Mac::AETE::Parser. AUTHOR
David Schooley <dcschooley@mediaone.net> perl v5.10.0 2005-05-16 Mac::AETE::App(3)
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