Quick background thread reloader and scaffolding

[CmdrDats]

I wrote a quick function to fire off a background thread when your app starts so that it would automatically reload your namespaces without any extra fuss - a call to (start-nstracker ["src" "test" "checkouts"]) and you're done.

The other part is a bit more interesting - I've built a (scaffold!) macro that you can wrap around most any piece of code - then when that code executes, it will remember it and keep running it with its local state on every reload. I'm finding it immensely useful for GUI development - I can wrap it around panel generation and code almost live after getting to a certain state in the app with it automatically reconstructing the tweaked UI with it's local state.

It's not perfect, but I figured maybe it's useful to others, so I decided to contribute it to this project since it makes sense in here :)

[CmdrDats]

Another thing I wanted to mention - This is what I call on startup to hook the two concepts together:

(tracker/start-nstracker ["src" "checkouts"] 500 
    (fn [_] (info "Reloading") (run-scaffolds)))

I'd put that into the library too, but I can't really get a good grip on where it belongs - should ns-tracker.core :require scaffold, or the other way round? So I'm going to go with letting people hook it up themselves :)

[weavejester]

These look like very useful additions, but they're beyond the scope of the library. The ns-tracker library is just for tracking changes to namespaces, not for reloading them.

However, I'd encourage you to take these changes and create a new library that depends on ns-tracker.

[CmdrDats]

Ok, cool - I'll pull them out into another library then :) Thanks for the feedback!