# File lib/buildr/packaging/zip.rb, line 68
    def contain?(*patterns)
      content = Zip::ZipFile.open(zipfile) { |zip| zip.file.read(@name) }
      patterns.map { |pattern| Regexp === pattern ? pattern : Regexp.new(Regexp.escape(pattern.to_s)) }.
        all? { |pattern| content =~ pattern }
    end