Snaps using the cups interface with the cups snap as of snapd 2.55 will create
a bind mount of /run/cups -> /var/cups, which since /var/cups does not exist
will trigger the writable mimic code to create a writable mimic on /var. This
results in a fair amount of extra bind mounts for every directory in /var, so
creating this directory empty in the base snap ensures that no writable mimic
need be created.
Note that this will result in review-tools complaining when this is merged and a
new core18 is uploaded since a new directory is being added to the base snap,
but this is okay.
anonymouse64
commented
2 years ago
Snaps using the cups interface with the cups snap as of snapd 2.55 will create a bind mount of /run/cups -> /var/cups, which since /var/cups does not exist will trigger the writable mimic code to create a writable mimic on /var. This results in a fair amount of extra bind mounts for every directory in /var, so creating this directory empty in the base snap ensures that no writable mimic need be created.
Note that this will result in review-tools complaining when this is merged and a new core18 is uploaded since a new directory is being added to the base snap, but this is okay.