fix conditions for enabling services

Without this fix, kresd and others would get enabled even though the
main mailserver option is disabled.

mail-server/borgbackup.nix

@@ -19,7 +19,7 @@
 let
   cfg = config.mailserver.borgbackup;
 
-  methodFragment = lib.optional (cfg.compression.method != null) cfg.compression.method;  
+  methodFragment = lib.optional (cfg.compression.method != null) cfg.compression.method;
   autoFragment =
     if cfg.compression.auto && cfg.compression.method == null
     then throw "compression.method must be set when using auto."
@@ -56,7 +56,7 @@ let
     ${cmdPostexec}
   '';
 in {
-  config = lib.mkIf config.mailserver.borgbackup.enable {
+  config = lib.mkIf (config.mailserver.enable && cfg.enable) {
     environment.systemPackages = with pkgs; [
       borgbackup
     ];

mail-server/clamav.nix

@@ -20,7 +20,7 @@ let
   cfg = config.mailserver;
 in
 {
-  config = lib.mkIf cfg.virusScanning {
+  config = lib.mkIf (cfg.enable && cfg.virusScanning) {
     services.clamav.daemon.enable = true;
     services.clamav.updater.enable = true;
   };

mail-server/kresd.nix

@@ -20,7 +20,7 @@ let
   cfg = config.mailserver;
 in
 {
-  config = lib.mkIf cfg.localDnsResolver {
+  config = lib.mkIf (cfg.enable && cfg.localDnsResolver) {
     services.kresd.enable = true;
     networking.nameservers = [ "127.0.0.1" ];
   };

mail-server/monit.nix

@@ -20,7 +20,7 @@ let
   cfg = config.mailserver;
 in
 {
-  config = lib.mkIf cfg.monitoring.enable {
+  config = lib.mkIf (cfg.enable && cfg.monitoring.enable) {
     services.monit = {
       enable = true;
       config = ''

mail-server/nginx.nix

@@ -24,7 +24,7 @@ let
   acmeRoot = "/var/lib/acme/acme-challenge";
 in
 {
-  config = lib.mkIf (cfg.certificateScheme == 3) {
+  config = lib.mkIf (cfg.enable && cfg.certificateScheme == 3) {
     services.nginx = {
       enable = true;
       virtualHosts."${cfg.fqdn}" = {

mail-server/post-upgrade-check.nix

@@ -22,17 +22,17 @@ let
   cfg = config.mailserver;
 in
 {
-  config = mkIf cfg.rebootAfterKernelUpgrade.enable {
+  config = mkIf (cfg.enable && cfg.rebootAfterKernelUpgrade.enable) {
     systemd.services.nixos-upgrade.serviceConfig.ExecStartPost = pkgs.writeScript "post-upgrade-check" ''
       #!${pkgs.stdenv.shell}
-      
+
       # Checks whether the "current" kernel is different from the booted kernel
       # and then triggers a reboot so that the "current" kernel will be the booted one.
       # This is just an educated guess. If the links do not differ the kernels might still be different, according to spacefrogg in #nixos.
-      
+
       current=$(readlink -f /run/current-system/kernel)
       booted=$(readlink -f /run/booted-system/kernel)
-      
+
       if [ "$current" == "$booted" ]; then
         echo "kernel version seems unchanged, skipping reboot" | systemd-cat --priority 4 --identifier "post-upgrade-check";
       else

mail-server/rsnapshot.nix

@@ -39,7 +39,7 @@ let
   '';
   postexecString = optionalString postexecDefined "cmd_postexec	${postexecWrapped}";
 in {
-  config = mkIf cfg.backup.enable {
+  config = mkIf (cfg.enable && cfg.backup.enable) {
     services.rsnapshot = {
       enable = true;
       cronIntervals = cfg.backup.cronIntervals;