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8637155
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2011-12-26T15:47:42.920
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2011-12-26T17:29:35.433
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2011-12-26T17:29:35.433
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In your example you add working directory (<code>"."</code>) to ruby load path (<code>$:</code>). Working directory (<code>"."</code>) was removed from load path (global variable <code>$:</code> or <code>$-I</code> or <code>$LOAD_PATH</code>) in Ruby 1.9 because it was considered a security risk: <ul> <li>Your working directory may be any folder, and your script will require files from this folder if these files have appropriate names. For example you have 2 files in Project1 folder main.rb and init.rb:</li> </ul> <blockquote> ==Project1/main1.rb: $: << "." require 'init' ==Project1/init.rb: puts 'init 1' </blockquote> And you have alike project: <blockquote> ==Project2/main2.rb: $: << "." require 'init' ==Project2/init.rb: puts 'init 2' </blockquote> If you run Project1 from Project2 folder, then main1.rb will require Project2/init.rb, not Project1/init.rb: <blockquote> ~/Projects/Project2$ ruby ../Project1/main1.rb init 2 # may be unexpected an dangerous ~/Projects/Project2$ ruby main2.rb init 2 </blockquote> <ul> <li>You can change your working directory in your code, e.g. using <code>Dir.chdir</code>: <pre><code>ruby-1.9.2-p290 :002 > puts File.expand_path('.') => /home/alex/Projects ruby-1.9.2-p290 :003 > Dir.chdir('..') ruby-1.9.2-p290 :004 > puts File.expand_path('.') => /home/alex </code></pre></li> </ul> I recommend you to use the following techniques instead of <code>$: << '.'</code>: <ul> <li><a href="http://extensions.rubyforge.org/rdoc/classes/Kernel.html#M000039" rel="nofollow">require_relative</a> (Ruby 1.9 only)</li> <li>Add folder of the file to the working directory (common approach because it is compatible with Ruby 1.8): <code>$: << File.expand_path('..', __FILE__) etc.</code>. <code>__FILE__</code> is a reference to the current file name. <a href="http://www.ruby-doc.org/core-1.9.3/File.html#method-c-expand_path" rel="nofollow">File.expand_path</a> converts a pathname to an absolute pathname.</li> </ul>
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1. POWhat does $:<< "." do to Ruby's require path?
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1. USAliaksei Kliuchnikau
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1. USAliaksei Kliuchnikau
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