Customize T4 Scaffolding With PowerShell


I want to create a Custom Scaffolder that uses arbitrary PowerShell logic. It can render T4 templates (multiple ones if I want), with the result being output:

  • As a new file in your project
  • as a new code block inserted into an existing class
  • my PowerShell logic can use Visual Studio’s “code model” API to manipulate files and code elements in other arbitrary ways.

How to Customize T4 Scaffolding With PowerShell?



In Package Manager Console of Visual Studio execute the following
command :

This adds a CodeTemplates folder to your project, containing files for
the new scaffolder.

As you can see, we’ve got two files:

  • A PowerShell script (.ps1), where we can put arbitrary logic to decide what templates get rendered and where the output goes. By
    default, it renders a T4 template and uses the output to create a new
    file called ExampleOutput in the root of your project.
  • A T4 template (.t4), i.e., the thing that the default .ps1 file renders. By default this generates a simple C#/VB class (depending on
    your project type). If you want to see this working, you can run the
    custom scaffolder right away:

    Scaffold ClassName

This will generate a new class file, ExampleOutput.cs, in the root
folder of your project. That’s really just to show you how it works.
We don’t really want that, so don’t run the new scaffolder yet, or if
you already have done, delete ExampleOutput.cs


Customize T4 Scaffolding With PowerShell by licensed under CC BY-SA | With most appropriate answer!

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