Ignore cache directories for flatpak apps

[Michael Catanzaro]

I noticed Deja Dup was spending a huge time backing up my ~/.var/app/org.gnome.Epiphany/cache. Deja Dup is already careful to never back up ~/.cache, so it should probably automatically ignore application caches under ~/.var/app as well.

This is currently difficult to do manually because I currently have to either (a) manually exclude all of ~/.var/app (too much! I do want to back that up!) or (b) manually exclude the cache directories of individual apps (silly and fragile as it breaks when I install new apps).

My suggestion is to skip any directory matching the form ~/.var/app/ANYTHING/cache

I'm using Fedora 27:

$ deja-dup --version
deja-dup 37.1

deja-dup is actually version 38.0-1.fc27. Did you forget to bump the version number, or did something horrible go wrong downstream?

$ duplicity --version
duplicity 0.7.17

[Will Thompson (wjt)]

Duplicate of #1766489

[Michael Terry (mterry)]

https://git.launchpad.net/deja-dup/commit/?id=5ea74ba480bc53acaaaf45b8510f40ce5509de02