Update versions in poms

pommel.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'nokogiri'
require 'getopt/long'

@opt = Getopt::Long.getopts(
  ["--file", "-f", Getopt::REQUIRED],
  ["--artifact", "-a", Getopt::OPTIONAL],
  ["--expected", "-e", Getopt::OPTIONAL],
  ["--group", "-g", Getopt::REQUIRED],
  ["--version", "-v", Getopt::REQUIRED]
)

def updateVersion(node)
  node.css('> version').map do |version|
    if version.text == @opt['expected'] or not @opt['expected']
      version.content = @opt['version']
    end
  end
end

doc = Nokogiri::XML(open(@opt['file']))

doc.css('groupId').each do |group|
  if group.text == @opt['group']
    p = group.parent
    if @opt['artifact']
      p.css('> artifactId').map do |artifact|
        if artifact.text == @opt['artifact']
          updateVersion(p)
        end
      end
    else
      updateVersion(p)
    end
  end
end

File.open(@opt['file'], 'w') {|f| f.write(doc.to_xml)}