Method: Thor::Util.ruby_command

Defined in:
lib/vendor/thor/lib/thor/util.rb

.ruby_command ⇒ Object

Return the path to the ruby interpreter taking into account multiple installations and windows extensions.



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# File 'lib/vendor/thor/lib/thor/util.rb', line 218

def self.ruby_command
  @ruby_command ||= begin
    ruby_name = RbConfig::CONFIG['ruby_install_name']
    ruby = File.join(RbConfig::CONFIG['bindir'], ruby_name)
    ruby << RbConfig::CONFIG['EXEEXT']

    # avoid using different name than ruby (on platforms supporting links)
    if ruby_name != 'ruby' && File.respond_to?(:readlink)
      begin
        alternate_ruby = File.join(RbConfig::CONFIG['bindir'], 'ruby')
        alternate_ruby << RbConfig::CONFIG['EXEEXT']

        # ruby is a symlink
        if File.symlink? alternate_ruby
          linked_ruby = File.readlink alternate_ruby

          # symlink points to 'ruby_install_name'
          ruby = alternate_ruby if linked_ruby == ruby_name || linked_ruby == ruby
        end
      rescue NotImplementedError
        # just ignore on windows
      end
    end

    # escape string in case path to ruby executable contain spaces.
    ruby.sub!(/.*\s.*/m, '"\&"')
    ruby
  end
end