How would you dive into a big codebase

[Jonathan M Davis via Digitalmars-d-learn]

On Wednesday, 22 October 2014 at 01:21:19 UTC, Freddy wrote:
> Is there any advice/tips for reading medium/big D codebases?

I'm not aware of there being anything about D which makes it any 
different to dig into a large codebase than it is for any other 
language. The usual suggestion that I've heard given (without any 
particular language in mind) is to start by tracking down and 
fixing a bug in it, though if the codebase isn't too large for 
it, personally, I'd be highly tempted to just read through it 
all. I don't think very many people function that way though.