How to validate path in configuration ?

[qpautrat]

A simple validation is done at compilation to check if file exist with file_exists().
That means that file can be moved after compilation for some reason.
On the other hand doing a verification on each execution is bad imo.
In any case, people should be able to use a remote path.

Should we keep validation ? If yes how to do that ?

[qpautrat]

I removed validation for 1.0.0 (2c3cd77).
But still i let this issue open.