device_of_mount

in itchef/cookbooks/fb_helpers/libraries/node_methods.rb [420:450]

• 26 lines of code
• 7 McCabe index (conditional complexity)

    def device_of_mount(m)
      fs = self.filesystem_data
      unless Pathname.new(m).mountpoint?
        Chef::Log.warn(
          "fb_helpers: #{m} is not a mount point - I can't determine its " +
          'device.',
        )
        return nil
      end
      unless fs && fs['by_pair']
        Chef::Log.warn(
          'fb_helpers: no filesystem data so no node.device_of_mount',
        )
        return nil
      end
      fs['by_pair'].to_hash.each do |pair, info|
        
        next unless pair.start_with?('/')
        
        next unless pair.end_with?(",#{m}")
        
        next unless info['kb_size']

        return info['device']
      end
      Chef::Log.warn(
        "fb_helpers: #{m} shows as valid mountpoint, but Ohai can't find it.",
      )
      nil
    end