Class: Which

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-which.rb

Overview

<manveru> you need organization…

Class Method Summary collapse

Class Method Details

.which(lib) ⇒ Object Also known as: require

Example usage:

puts Which.which( 'rails' )

Or from your shell:

rwhich rails

Returns the full library path if the given library is found in the $LOAD_PATH. Under rare circumstances, an Array may be returned in the case of multiple matches under one path.



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# File 'lib/ruby-which.rb', line 19

def self.which( lib )
  begin
    Kernel#require( lib )
  rescue LoadError
    return nil
  end

  $LOAD_PATH.each do |path|
    extension = nil
    if File.extname( lib ).empty?
      extension = '.{rb,so,o,dll,class}'
    end
    found = Dir[ "#{path}/#{lib}#{extension}" ]
    if found.size == 1
      return found[ 0 ]
    elsif found.any?
      return found
    end
  end

  nil
end