Helpful command line utility to generate a package manifest including package names and versions for both deb packages and snap packges.
This is a strict snap and requires you to connect the system-backup interface (https://snapcraft.io/docs/the-system-backup-interface) to access the host system package list. This is access read-only.
snap connect ubuntu-package-manifest:system-data
Source available @ https://github.com/CanonicalLtd/ubuntu-package-manifest