checkstyle2junit.rb

#!/usr/bin/env ruby

require 'open3'

module CheckstyleToJUnit
  # https://github.com/koalaman/shellcheck/wiki/JUnit
  XSLT = File.expand_path('../support/checkstyle2junit.xslt', __dir__)

  class << self
    def call
      puts translate(ARGF.read)
    end

    def translate(input)
      out, stat = Open3.capture2('xmlstarlet', 'tr', XSLT, stdin_data: input)
      abort('xmlstarlet failed') unless stat.success?
      out
    end

    def spawnwait(*args, **kwargs)
      _, stat = Process.waitpid2(Process.spawn(*args, **kwargs))
      stat
    end

    def must_spawnwait(*args, **kwargs)
      stat = spawnwait(*args, **kwargs)
      abort("#{args.first} failed") unless stat.success?
      stat
    end
  end
end

__FILE__ == $PROGRAM_NAME and CheckstyleToJUnit.call