module BuildCanary
  class Leak < Struct.new(:location, :line, :pattern)
    def short_lines(context_length = 30)
      matchdata = pattern.match(line)
      [].tap do	|lines|
      	0.upto(matchdata.size-1) do |i|
          start, finish = matchdata.offset(i)
          start -= context_length

          lines << self.line[start, matchdata[i].size + (context_length*2)]
        end
      end
    end
  end
end