build all solutions in a folder.rb

require 'albacore'

task :default => [:buildall]

task :buildall do
  FileList.new("./**/*.sln").each do |sln|
    
    msbuild "build_#{sln}", [:solution] do |msb, args|
      msb.solution = args.solution
      msb.targets :clean, :build
      msb.properties :configuration => :release
    end
    
    Rake::Task["build_#{sln}"].invoke(sln)
  end
end