rake aptana:aptana task for generating both .loadpath and .projects file to load a rails project into eclipse aptana IDE

aptana.rake

namespace :aptana do
  RAILS_APPDIR = RAILS_ROOT.sub("/config/..","")

  LIBS = %w{rails activerecord actionmailer actionpack
            actionwebservice activeresource activesupport}

  def project_name
    Pathname.new(RAILS_APPDIR).basename.to_s
  end

  def project_file(name)
    <<END
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
  <name>#{name}</name>
  <comment>Project #{name} with ruby on rails</comment>
  <projects>
  </projects>
  <buildSpec>
    <buildCommand>
      <name>org.rubypeople.rdt.core.rubybuilder</name>
      <arguments>
      </arguments>
    </buildCommand>
  </buildSpec>
  <natures>
    <nature>org.rubypeople.rdt.core.rubynature</nature>
    <nature>org.radrails.rails.core.railsnature</nature>
  </natures>
</projectDescription>
END
  end

  def loadpath_file(excludes, libs)
    content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<loadpath>\n"
    content << "\t<pathentry "
    content << "excluding=\"" << excludes.join('|') << '" '
    content << 'path="" type="src"/>'
    content << "\n\t"
    content << '<pathentry path="org.rubypeople.rdt.launching.RUBY_CONTAINER" type="con" />'
    content << "\n"
    pathentry = proc {|l| "\t<pathentry path=\"GEM_LIB/#{l}/lib\" type=\"var\"/>\n"}
    libs.each {|lib| content << pathentry.call(lib)}
    content << '</loadpath>'
  end

  task :aptana => :environment do
    FileUtils.chdir(RAILS_APPDIR)
    File.open(".loadpath", 'w') do |f|
      includes = []
      excludes = []
      Gem.path.each do |gem_path_base|
        FileUtils.cd( gem_path_base )
        FileUtils.cd( 'gems' )
        gems = Pathname.new('.')
        LIBS.each do |lib|
          gems.entries.each do |e|
            gem_lib = File.basename(e)
            if gem_lib == "#{lib}-#{RAILS_GEM_VERSION}"
              includes << File.basename(e)
            end
          end
        end

        FileUtils.cd(RAILS_APPDIR); FileUtils.cd('vendor')
        vendors = Pathname.new('.')
        vendors.entries.each do |e|
          name = File.basename(e)
          if e.symlink? and name.index('rails') == 0
            FileUtils.rm(e)
          else
            unless name.index('plugin') == 0 || name.index('.') == 0
              excludes << 'vendor' + File::SEPARATOR + name
            end
          end
        end
      end
      f.write loadpath_file(excludes, includes)
    end
    FileUtils.chdir(RAILS_APPDIR)
    File.open(".project", 'w+') do |f|
      f.write project_file(project_name)
    end
  end
end