#!/usr/bin/env ruby -w

# argv: logfile, [only tops]
# Collects all the URIs mentioned in the JS stacks, computes how many times
# each appears, and ranks them.  If the only-tops arg is present, this only
# looks at the top of each stack.

filename = ARGV.shift
onlyTops = ARGV.shift

uris = {}
open(filename, 'r') do |file|
  file.each do |line|
    next if onlyTops && /^0/ !~ line
    # e.g., ["chrome://browser/content/tabbrowser.xml":2445]
    match = /\["(.+?)"/.match(line)
    if match
      uri = match[1]
      uris[uri] ||= 0
      uris[uri] += 1
    end
  end
end

uris = uris.to_a.sort_by { |uri, cnt| -cnt }
maxCntLen = uris[0][1].to_s.size
uris.each { |uri, cnt| puts "%*d  %s" % [maxCntLen, cnt, uri] }