chrisortman

Rake task to update version information

I maintain assembly version numbers in my msbuild project files. It is (unfortunately) spread across 3 files for the time being, a .targets file, the master .proj file and a wix (.wxs) file.

So I thought I would hack a quick rake task that will update all these version numbers for me when it comes time to update the application. I ran into a snag though because REXML will by default output attributes like this

which is not what I want in my msbuild files. I instead want it to look like

What REXML outputs might still work correctly in MSBUILD, I never tested it, but it will be a lot harder to look at the file and maintain it by hand, so a solution is needed.

Thanks to the flexibility of ruby a solution is not that difficult. I found this post which got me started, then I just need to make a small addition (the Text::unnormalize call)

   REXML::Attribute.class_eval( %q^
      def to_string
            %Q[#@expanded_name="#{Text::unnormalize(to_s()).gsub(/"/,'&quot;')}"]
      end
   ^)

My complete task looks like this:

task :bump_version do |t|
   include REXML
   file_names = ["build.proj","project.targets","Install/program/install.wxs"]

   build_file, targets_file, install_file = file_names.collect do |file_name|
      f = File.new(file_name,"r")
      Document.new(f)
   end

   major,minor = build_file.root.elements["//ApplicationMajorVersion"].text, build_file.root.elements["//ApplicationMinorVersion"].text

   if minor.to_i == 9
      major = (major.to_i + 1).to_s
      minor = "0"
   else
      minor = (minor.to_i + 1).to_s
   end

   puts major + "." + minor

   build_file.root.elements["//ApplicationMajorVersion"].text = major
   build_file.root.elements["//ApplicationMinorVersion"].text = minor

   product_el = install_file.root.elements["Product"]
   product_el.attributes["Version"] = major + "." + minor + "." + "0.0"
   product_el.attributes["Id"] = new_guid[1..-2]
   product_el.elements["Upgrade"].each_element do |el|
      el.attributes["Minimum"] = product_el.attributes["Version"] unless el.attributes["Minimum"].nil?
      el.attributes["Maximum"] = product_el.attributes["Version"] unless el.attributes["Maximum"].nil?
   end

   targets_file.root.elements["//AssemblyMajor"].text = major
   targets_file.root.elements["//AssemblyMinor"].text = minor

# see:    http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/74224 ... slightly modified
   REXML::Attribute.class_eval( %q^
      def to_string
            %Q[#@expanded_name="#{Text::unnormalize(to_s()).gsub(/"/,'&quot;')}"]
      end
   ^)


   [build_file, targets_file, install_file].each_with_index do |file, index|
      File.open(file_names[index],'w') { |writeable| file.write(writeable,0) }
   end   
end

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chrisortman

Rake task to update version information

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