I’ve got a light-weight haml-based site that I’m building with Middleman (not Rails, but I’m tagging this with Rails because I think Rails people might know the answer).

Is it possible to define a function in-line in the haml file and then use it later in that same file?

(Yes, I know how to use separately-defined helper files. That’s not the question.)

I have a page with a function that is uniquely specialized to that page. Defining it in a helper file is to me an unnecessary separation.

Example:

-def foo(color,text)
  -content_tag :p, style: "color: #{color}" do
    -text

%html
  %head
    %title Demo page

  %body
    %h1 demo page

    =foo("red", "this is red")
    =foo("blue", "this is blue")

Rendering the above page results in undefined method 'foo'.

Is there a way to make that work? (Did I define the function incorrectly?)