I installed libreoffice from snap. The program works fine but I'm locked in the snap container. Trying to open an office attachment in Evolution results in:
Access to /home/user/.cache/evolution/tmp/evolution-user/Document.xlsx was denied.
I get the idea that snap packages are self contained and secure, but in order to work within a system other packages that were installed from .deb should be granted access to snap. How can I do this without compromising security?
Update: In response to user spktkpkt, when I list
$snap interfaces Slot Plug :bluetooth-control - ... :gsettings emacs-tealeg :hardware-observe canonical-livepatch :home emacs-tealeg,libreoffice
I can see that libreoffice is connected to :home but, maybe because my document is in a hidden folder (.cache) it can't be accessed.
Note that home interface can only access non-hidden files as described on the interfaces reference page of snap:
[home Interface] Can access non-hidden files in user's $HOME and gvfs mounted directories owned by the user to read/write/lock.