I don't think this is what you're supposed to do, it feels criminal

javascript.haml

-# this does NOT work
- content_for :javascripts do
    :javascript
      alert(1);
      - if should_render_console_log
        console.log('butt');

-# this works and I hate it
- console_log_stmt = should_render_console_log ? "console.log('butt');" : ""
- content_for :javascripts do
    :javascript
      alert(1);
      #{console_log_stmt}