T4 output filename

Question

How can i use generated file's name in template? I'd like to something like this:

// This file: <#= OutputFileName #> was autogenerated

How can i do that in T4 or in T4Toolbox?

Answer 1

This seemed like something that should be as simple as reading a property but after reflecting over the Host variable and disassembling the text generator code I think the simplest way of doing this is:

<#@ template language="C#" hostspecific="true"  #>
<#@ import namespace="System.IO"                #>

// <#=Path.ChangeExtension (Host.TemplateFile, "cs")#>

Answer 2

It better to define it as a directive

for example for a xaml file

<#@ output extension="xaml" #>

or for txt

<#@ output extension=".txt" #>