Help with context-free grammar of lots of literal text with some special syntax

Question

How do you make a context free grammar that analyzes mostly literal text (spaces, characters, symbols, etc.) while also looking for expressions of the form ${...} or $someCommand{...}? Note if it finds "I got $10 today", it should not do anything special with it.

Is it possible?

Answer 1

Yes, it is possible.

Since this is the right answer, I believe you will accept it.