erb relative inclusion

execute

$ erubis outer-template.erb
bash -x -c '

echo $(date +%s) > /tmp/test-templates
echo "this is an outer template" >> /tmp/test-templates
'
bash -x -c '

echo "This is an inner template" >> /tmp/test-templates
echo "Some inner ruby: 25"
'

inner-template.erb

bash -x -c '

echo "This is an inner template" >> /tmp/test-templates
echo "Some inner template ruby math results: <%= 5 * 5 %>"
'

outer-template.erb

bash -x -c '

echo $(date +%s) > /tmp/test-templates
echo "this is an outer template" >> /tmp/test-templates
'
<%
  def import(fname)
    eruby = Erubis::Eruby.new
    here = Pathname.new(__FILE__).dirname.realpath
    input = File.read(File.join(here, fname))
    src = eruby.convert(input)
    eval src
  end
-%>
<%= import('inner-template.erb') %>