bug#35418: [PATCH] Don't poll auto-revert files that use notification

[Mattias Engdegård]

8 maj 2019 kl. 12.58 skrev Eli Zaretskii <eliz@gnu.org>:

> IOW, I wonder whether your proposed patch could be made more general
> in some way.

So do I, but since I could not come up with one, this ad-hoc solution appeared 
as a placeholder.
The code can be improved later on, but the patch is a strict improvement on the 
code in master.

An example of a generalisation: We could add a buffer-specific variable that 
tells autorevert that yes, this buffer can rely on directory notifications 
despite not having a buffer-file-name. All modes to which this applies would 
need to set that variable.

I don't think there is a passive condition, and furthermore, because of the 
nature of directory notifications, any mode that qualifies is likely to be some 
kind of variation on Dired: a buffer whose contents is determined by the set of 
files in its default-directory, but not their data.