A Checkstyle checks counter

README.md

Checkstyle Violation Counter

A short script to count Checkstyle violation types.

Usage

$ ruby xml.rb /path/to/checkstyle-results.xml

Output

{"MethodNameCheck"=>218,
 "LineLengthCheck"=>139,
 "WhitespaceAroundCheck"=>93,
 "NewlineAtEndOfFileCheck"=>54,
 "JavadocStyleCheck"=>35,
 "OperatorWrapCheck"=>30,
 "UpperEllCheck"=>18,
 "MemberNameCheck"=>17,
 "HideUtilityClassConstructorCheck"=>16,
 "StaticVariableNameCheck"=>14,
 "ModifierOrderCheck"=>7,
 "UnusedImportsCheck"=>2,
 "ParameterNameCheck"=>1,
 "FileTabCharacterCheck"=>1,
 "WhitespaceAfterCheck"=>1}

xml.rb

require 'nokogiri'
require 'pp'

fail 'must supply 1 argument: checkstyle results XML file' if ARGV.length != 1

xml = Nokogiri::XML(File.open(ARGV[0]))

pp xml.xpath('//error[@source]')
  .inject([]) { |a, e| a.push(e.attributes['source'].value) }
  .map { |e| e.split('.')[-1].strip }
  .reduce({}) { |a, e| a.update(e => a.fetch(e, 0) + 1) }
  .sort_by { |_, v| -v }
  .to_h