Haddock, Cabal: How to include source code examples?

I am the author of the operational package, which includes example code. I would like this e开发者_如何学JAVAxample code to be hscolored and installed together with the API documentation, which is generated by Haddock.

I probably have to use a custom Cabal build type and create a user hook for the Haddock phase. However, I never managed to make this work. Hence, my question is:

How to include full modules as example code in Haddock?

Could you give an example of a Cabal user hook that applies hscolor to an additional source code file example.hs and joins the result with the generated Haddock documentation?

I'm a total Haskell nube and this is a shot in the dark, but couldn't you use hscolour to output the code as HTML and then do something along the lines of cabal haddock --executables --hyperlink-source to include the colorized HTML?