support pathlib.Path

[karlicoss]

Path is a trivial wrapper around str. I guess generally think of a good way to allow adhoc mapping of simple types.
Perhaps current Exception makes sense.

[ankostis]

Wouldn't be interesting to hash & compare the actual file it refers to see if it has changed, to invalidate the cache?
That way, promensia indexcould benefit if nothing has changed on disk.

[karlicoss]

Yep, this is the idea! Even the stat().st_mtime is probably a good proxy for the file modification time?

It's possible to support something like it, for example:
https://github.com/karlicoss/HPI/blob/ed47e98d5c85b3334b3be059ad31b82c6fc0d19c/my/emfit/__init__.py#L27-L33

Another example (which Promnesia already benefits from) is caching org-mode files -- it makes incremental indexing pretty instantaneous on my computer, at least

https://github.com/karlicoss/HPI/blob/e81dddddf083ffd81aa7e2b715bd34f59949479c/my/orgmode.py#L78-L81

but would be nice to make it 'native'!