f326e5a35e
Enhance the heuristics to make sure that a user doesn't accidentally upgrade across two major versions of Nextcloud (e.g. from v17 to v19). The original idea/discussion has been documented in the nixpkgs manual[1]. This includes the following changes: * `nextcloud19` will be selected automatically when having a stateVersion greater or equal than 20.09. For existing setups, the package has to be selected manually to avoid accidental upgrades. * When using `nextcloud18` or older, a warning will be thrown which recommends upgrading to `nextcloud19`. * Added a brief paragraph about `nextcloud19` in the NixOS 19.09 release notes. * Restart `phpfpm` if the Nextcloud-package (`cfg.package`) changes[2]. [1] https://nixos.org/nixos/manual/index.html#module-services-nextcloud-maintainer-info [2] https://github.com/NixOS/nixpkgs/pull/89427#issuecomment-638885727