--- /dev/null
+{
+ outputs = { self }: {
+ nixosModule = { config, lib, pkgs, ... }:
+ # https://github.com/michalrus/dotfiles/commit/ebd5fa9583f82589f23531647aa677feb3f8d344#diff-4d353005ef5b3e37f33c07332b8523edR1
+ # A temporary hack to `loginctl enable-linger $somebody` (for
+ # multiplexer sessions to last), until this one is unresolved:
+ # https://github.com/NixOS/nixpkgs/issues/3702
+ #
+ # Usage: `users.extraUsers.somebody.linger = true` or slt.
+
+ with lib;
+
+ let
+
+ dataDir = "/var/lib/systemd/linger";
+
+ lingeringUsers = map (u: u.name) (attrValues (flip filterAttrs config.users.users (n: u: u.linger)));
+
+ lingeringUsersFile = builtins.toFile "lingering-users"
+ (concatStrings (map (s: "${s}\n")
+ (sort (a: b: a < b) lingeringUsers))); # this sorting is important for `comm` to work correctly
+
+ updateLingering = pkgs.writeScript "update-lingering" ''
+ if [ ! -e ${dataDir} ]; then
+ install -m 0755 -o root -g root -d ${dataDir}
+ fi
+ if [ -e ${dataDir} ] ; then
+ ls ${dataDir} | sort | comm -3 -1 ${lingeringUsersFile} - | xargs -r ${pkgs.systemd}/bin/loginctl disable-linger
+ ls ${dataDir} | sort | comm -3 -2 ${lingeringUsersFile} - | xargs -r ${pkgs.systemd}/bin/loginctl enable-linger
+ fi
+ '';
+
+ in
+
+ {
+ # Necessary for situations where flake gets included multiple times
+ key = builtins.hashString "sha256" (builtins.path { path = self.sourceInfo.outPath; name = "source"; });
+ options = {
+ users.users = mkOption {
+ type = lib.types.attrsOf (lib.types.submodule {
+ options = {
+ linger = mkEnableOption "lingering for the user";
+ };
+ });
+ };
+ };
+
+ config = {
+ system.activationScripts.update-lingering = {
+ deps = ["users"];
+ text = "${updateLingering}";
+ };
+ };
+ };
+ };
+}