Report On the Worst code in your codebase (for some definition of worst) as reported by Team City and NCover

worst_code.rb

# Report On the Worst code in your codebase (for some definition of worst) as reported by Team City and NCover
# *******This works for us.. may need editing to work for you!********
# By Nigel Thorne (nwt) www.nigelthorne.com
# https://gist.github.com/gists/1403141

#install : 
# once ruby is installed... 
# and in your path
# gem install nokogiri
# gem install mechanize
# change the username password and server 
# then run from the folder you want to recurse down from 
# by calling "ruby worst_code.rb"
# from a command prompt.

@@USERNAME = 'username'
@@PASSWORD = 'password'
@@SERVER = 'http://server:8000'
@@TEAMCITYBUILDID = "bt01"


require 'rubygems'
require 'open-uri'
require 'nokogiri'
require 'mechanize'

def worst(node_set)
  node_set.map{|m| [m,score(m)] }.sort { |a,b| b[1]<=>a[1] }[0]
end

def score(node)
  count(node) > 0 ? percent(node) * coverage(node) : 0.0
end

def uncovered_count(node)
   node.xpath(".//seqpnt[@vc = '0']").length
end

def count(node)
   node.xpath(".//seqpnt").length
end

def percent(node)
   uncovered_count(node).to_f/count(node).to_f
end

def coverage(node)
  node['cc'].to_f
end

def old_score(node)
  uncovered_count(node) * coverage(node)
end

def login_to_TeamCity
  a = Mechanize.new { |agent|
      agent.user_agent_alias = 'Mac Safari'
      agent.auth(@@USERNAME, @@PASSWORD)
    }

  a.get(@@SERVER + "/httpAuth/") # log us in
  a
end

def get_latest_build_number(a)
    p = a.get(@@SERVER + "/viewType.html?tab=buildTypeStatusDiv&buildTypeId=#{@@TEAMCITYBUILDID}")
    p.search(".testList").search("a").select{|x| /Tests passed:/ =~ x.text }.first[:href].match(/buildId=([0-9]+)/)[1]
end

def csv(*args)
   args.map{|a| "\"#{a.to_s.gsub(/"/,'""')}\""}.join(",")
end

 
if (File.exists?("merged.xml"))
	@content = File.read("merged.xml")
else
	a = login_to_TeamCity
	build = get_latest_build_number(a)
	@content = a.get(@@SERVER + "/repository/download/#{@@TEAMCITYBUILDID}/#{build}:id/ncover/All/Full/merged.xml").content
#	@content = a.get(@@SERVER + "/repository/download/#{@@TEAMCITYBUILDID}/.lastFinished/ncover/All/Full/merged.xml").content
	x = File.open("merged.xml","w+"){|f| f << @content} 
end

methods = Nokogiri.XML(@content).xpath('.//method')
scored_methods = methods.map{|m| [m,score(m)] }.sort { |a,b| b[1]<=>a[1] }
File.open("worst_code_results.csv", "w+") do |output|
  output.write("Score,Class,Method,CC,Old Score\n")
  output.write(scored_methods.map{|m| csv(m[1],m[0].parent['name'],m[0]['signature'],m[0]['cc'],old_score(m[0]))}.join("\n"))
end