class Utils::Grepper

def match(filename)
  @filename = filename
  @output = []
  bn, s = File.basename(filename), File.stat(filename)
  if !s || s.directory? && @config.search.prune?(bn)
    @args['v'] and warn "Pruning #{filename.inspect}."
    prune
  end
  if s.file? && !@config.search.skip?(bn) &&
    (!@name_pattern || @name_pattern.match(bn))
  then
    File.open(filename, 'rb') do |file|
      if file.binary? != true
        @args['v'] and warn "Matching #{filename.inspect}."
        if @args['f']
          @output << filename
        else
          match_lines file
        end
      else
        @args['v'] and warn "Skipping binary file #{filename.inspect}."
      end
    end
  else
    @args['v'] and warn "Skipping #{filename.inspect}."
  end
  unless @output.empty?
    case
    when @args['l'], @args['e']
      @output.uniq!
      @paths.concat @output
    else
      STDOUT.puts @output
    end
    @output.clear
  end
  self
end