[Gpsbabel-code] What's the best practice for changing what an input module does?

[Ron P. <ro...@pa...>]

I've been looking at the saroute input module, and I'd like to add
functionality to it to create waypoints for the start point, end
point, stop points, and via points in addition to the routes it
already creates.  But I'm concerned that this will cause problems
for anyone who's got scripts that expect saroute to only do routes.
In particular, anyone converting .anr files to arcs for use with
the arc filter wouldn't like the extra points at the beginning of
their arc.

So what's the done thing?  Should I make it an option, ensuring that
95% of Windows users will never know it exists or be able to use it?
Or should I just steamroll the handful of people who depend on the
current behavior?

(Obviously, it'd be nice if xcsv allowed us to say that the arc format
only wants route points and track points, but since that was just an
example I don't think it's the best solution to this problem.)