[Feature Request] Function name stack

[ptusch]

Hi,

I'd love to hear your thoughts about an optional function stack trace that simple tracks the names of a function and simply pops it when it finishes.

I think it's rather easy to add external functions functionPush (or fPush) / functionPop (or fPop) with fPush having the argument of a string (name of function).
Those names need to be stored in an array and should be added to the namespace* whenever a debug in that function is called.

To not break the current pattern, the functionname stack can be concatted with a simple -> so you still call you debug from the cli like DEBUG=test:run and have results like:
*test:run->funcA* Hello from funcA

Function a would look like this:

function funcA() {
  debug.fPush('funcA');

  debug('Hello from funcA');

  debug('fPop');
}

This allows a developer to see the live stacktrace if you want to.
The drawback is obvious though - you have to take care of the push and pop.
But the advantages might overweight.

If you like this idea, I'll add it and PR it to you.
Any thoughts?

• Or simply added to the output when a debug is called. I don't think string operations left and right are a good way.

[thebigredgeek]

middleware should help with this: #370