It would be good to have an info property, say Apt.mirror, which sets a host's preferred apt mirror. Then all properties in Propellor.Property.Apt would use this mirror when generating sources lists, falling back to the deb.debian.org default. The value of Apt.mirror could be an apt cache on the LAN, or a mirror that is known to be better than the Debian CDN from where the host is located. --spwhitton
apt-mirrorof repohttps://git.spwhitton.name/propellorfor an implementation of this.