How to display wiki markup in script custom email?

[Goodgame Studios]

I would like to convert wiki markup from custom field (free text) to HTML by the script runner post function - send custom email.

How would the path look like?
Now I have the wiki style:

<% out <<
issue.getCustomFieldValue(componentManager.getCustomFieldManager().getCustomFieldObjectByName("Expected Problems")) %>

2015-08-07_11h51_49.png

[Goodgame Studios · Accepted solution]

I have resolved this issue 

<% 
def rendererManager = com.atlassian.jira.component.ComponentAccessor.getComponent( com.atlassian.jira.issue.RendererManager.class)
def fieldLayoutItem = com.atlassian.jira.component.ComponentAccessor.getFieldLayoutManager().getFieldLayout(issue).getFieldLayoutItem(componentManager.getCustomFieldManager().getCustomFieldObjectByName("field name"))
def renderer = rendererManager.getRendererForField(fieldLayoutItem)
String desc = renderer.render(issue.getCustomFieldValue(componentManager.getCustomFieldManager().getCustomFieldObjectByName("field name")), null)
%>
<%= desc %>

[Fazila Ashraf]

For any one who was looking for a solution on this, scriptrunner documentation has a latest solution. See https://scriptrunner.adaptavist.com/5.0.9/jira/builtin-scripts.html#_send_a_custom_email

If you are sending HTML mails you will want fields containing wiki markup to be converted to HTML. You can use the following code in your templates.

${helper.render(issue.description)}