title: How to run kiba etl in a rails environment?
body: <p>I have to load data into a Spree application. Spree makes use of Rails Engines.</p>
  
  <p>All examples use pretty print or CSV destinations, but I want to use spree models in the destination, eg. <code>SpreeModel.create!(row)</code></p>
  
  <p>I tried to do <code>rails runner "exec('kiba db/etl/convert-csv.etl')"</code>, but I get this error:</p>
  
  <pre><code>db/etl/convert-csv.etl:4:in `parse': uninitialized constant Kiba::Context::Spree (NameError)
  </code></pre>
  
  <p>I've also tried within the Rails console, without success.</p>