find_config_file (CWrp::Cli)

    # File ../lib/roller.rb, line 501
        def self.find_config_file(filename)
          filename += EXT_CONFIG if File.extname(filename).empty?
          # Check CWD then check default location.
          default_file = File.expand_path(File.join(DEFAULT_CONFIG_DIR, filename))

          if File.exist? filename
            return filename
          elsif File.exist? default_file
            return default_file
          else
            puts "Config file for replacement, '#{filename}', not found."
            return nil
          end
        end