[LRUG] Working out the path of a gem from within the gem

[Martin Sadler]

The Reliable Message gem does that I believe.. goes to look:

         def initialize file, logger = nil
             @logger = logger
             # If no file specified, attempt to look for file in  
current directory.
             # If not found in current directory, look for file in  
Gem directory.
             unless file
                 file = if File.exist?(CONFIG_FILE)
                     CONFIG_FILE
                 else
                     file = File.expand_path(File.join(File.dirname 
(__FILE__), '..'))
                     File.basename(file) == 'lib' ? File.join(file,  
'..', CONFIG_FILE) : File.join(file, CONFIG_FILE)
                 end
             end
             @file = File.expand_path(file)
             @config = {}
         end



On 3 Mar 2008, at 11:21, Dan Webb wrote:

> Hello all,
>
> Having a problem that I can't successfully google and I wondered if
> any of you had come across the problem before and have any wisdom.
> Here goes...
>
> I'm writing a gem where some of the code in the lib dir refers to a
> yaml file in the data directory of the gem.  In the code I try to load
> the yaml file like this:
>
> YAML.load_file(File.join(File.dirname(__FILE__), '..', 'data',
> 'country_codes.yml'))
>
> But, when you load the gem it turns out that __FILE__ is set to:
>
> /Library/Ruby/Site/1.8/country_codes.rb
>
> Instead of the actual file.  Which is annoying but hey, its all the
> fun of ruby.  My question is though, how can I refer the installed gem
> directory?
>
> Cheers,
>
> -- 
> Dan Webb
> http://www.danwebb.net
>
> aim: danwrong123
> skype: danwrong
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