nixos/test/nominatim: replace activation script by ExecStartPre (#475396)

      { config, pkgs, ... }:

      {

        # Database password

        system.activationScripts = {

          passwordFile.text = with config.services.nominatim.database; ''

        systemd.services.nominatim = {

          serviceConfig.ExecStartPre =

            let

              createPasswordFile = lib.getExe (

                pkgs.writeShellApplication {

                  name = "nominatim-pre-start";

                  text =

                    let

                      inherit (config.services.nominatim.database)

                        host

                        port

                        dbname

                        apiUser

                        ;

                    in

                    ''

                      mkdir -p /run/secrets

                      echo "${host}:${toString port}:${dbname}:${apiUser}:password" \

                        > /run/secrets/pgpass

                      chown nominatim-api:nominatim-api /run/secrets/pgpass

                      chmod 0600 /run/secrets/pgpass

                    '';

                }

              );

            in

            [

              "+${createPasswordFile}"

            ];

        };

        # Nominatim