dgu-vagrant-puppet | Container environment for booting fresh DGU | Continuous Deployment library

I'm not sure if this is the 'easiest way' but in short you would:

• add a form to templates/package/read.html with a to be created action (for example action="/dataset/{{ pkg.id }}/comment"). You might add a condition based on user.id or something.
• create a controller method for this action that get's the comment from request and sends the email

• add a route map to your plugin that connects the form's action URL with the controller method, for example:

  map.connect('/dataset/{id}/comment', controller="ckanext-.controller:YourPluginControllerClass", action="send_comment",)

I've done something similiar, and also added a modal box (based on bootstrap in that case) so that the form would appear as popup after clicking a link.