nixos/samba: migrate to structural settings (RFC42)

nixos/doc/manual/release-notes/rl-2411.section.md

@@ -335,6 +335,13 @@
 
 - The `replay-sorcery` package and module was removed as it unmaintained upstream. Consider using `gpu-screen-recorder` or `obs-studio` instead.
 
+- To follow [RFC 0042](https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md) a few options of `samba` have been moved from `extraConfig` to the new freeform option `settings` and renamed, e.g.:
+  - `services.samba.invalidUsers` to `services.samba.settings.global."invalid users"`
+  - `services.samba.securityType` to `services.samba.settings.global."security type"`
+  - `services.samba.shares` to `services.samba.settings`
+  - `services.samba.enableWinbindd` to `services.samba.winbindd.enable`
+  - `services.samba.enableNmbd` to `services.samba.nmbd.enable`
+
 - `zx` was updated to v8, which introduces several breaking changes.
   See the [v8 changelog](https://github.com/google/zx/releases/tag/8.0.0) for more information.
 

nixos/modules/services/network-filesystems/samba.nix

@@ -3,36 +3,13 @@
 with lib;
 
 let
-
-  smbToString = x: if builtins.typeOf x == "bool"
-                   then boolToString x
-                   else toString x;
-
   cfg = config.services.samba;
 
+  settingsFormat = pkgs.formats.ini { };
+  configFile = settingsFormat.generate "smb.conf" cfg.settings;
+
   samba = cfg.package;
 
-  shareConfig = name:
-    let share = getAttr name cfg.shares; in
-    "[${name}]\n " + (smbToString (
-       map
-         (key: "${key} = ${smbToString (getAttr key share)}\n")
-         (attrNames share)
-    ));
-
-  configFile = pkgs.writeText "smb.conf"
-    (if cfg.configText != null then cfg.configText else
-    ''
-      [global]
-      security = ${cfg.securityType}
-      passwd program = /run/wrappers/bin/passwd %u
-      invalid users = ${smbToString cfg.invalidUsers}
-
-      ${cfg.extraConfig}
-
-      ${smbToString (map shareConfig (attrNames cfg.shares))}
-    '');
-
   # This may include nss_ldap, needed for samba if it has to use ldap.
   nssModulesPath = config.system.nssModules.path;
 
@@ -68,6 +45,19 @@ in
   imports = [
     (mkRemovedOptionModule [ "services" "samba" "defaultShare" ] "")
     (mkRemovedOptionModule [ "services" "samba" "syncPasswordsByPam" ] "This option has been removed by upstream, see https://bugzilla.samba.org/show_bug.cgi?id=10669#c10")
+
+    (lib.mkRemovedOptionModule [ "services" "samba" "configText" ] ''
+      Use services.samba.settings instead.
+
+      This is part of the general move to use structured settings instead of raw
+      text for config as introduced by RFC0042:
+      https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md
+    '')
+    (lib.mkRemovedOptionModule [ "services" "samba" "extraConfig" ] "Use services.samba.settings instead.")
+    (lib.mkRenamedOptionModule [ "services" "samba" "invalidUsers" ] [ "services" "samba" "settings" "global" "invalid users" ])
+    (lib.mkRenamedOptionModule [ "services" "samba" "securityType" ] [ "services" "samba" "settings" "global" "security type" ])
+    (lib.mkRenamedOptionModule [ "services" "samba" "shares" ] [ "services" "samba" "settings" ])
+
   ];
 
   ###### interface
@@ -125,41 +115,6 @@ in
         example = "samba4Full";
       };
 
-      invalidUsers = mkOption {
-        type = types.listOf types.str;
-        default = [ "root" ];
-        description = ''
-          List of users who are denied to login via Samba.
-        '';
-      };
-
-      extraConfig = mkOption {
-        type = types.lines;
-        default = "";
-        description = ''
-          Additional global section and extra section lines go in here.
-        '';
-        example = ''
-          guest account = nobody
-          map to guest = bad user
-        '';
-      };
-
-      configText = mkOption {
-        type = types.nullOr types.lines;
-        default = null;
-        description = ''
-          Verbatim contents of smb.conf. If null (default), use the
-          autogenerated file from NixOS instead.
-        '';
-      };
-
-      securityType = mkOption {
-        type = types.enum [ "auto" "user" "domain" "ads" ];
-        default = "user";
-        description = "Samba security type";
-      };
-
       nsswins = mkOption {
         default = false;
         type = types.bool;
@@ -170,25 +125,31 @@ in
         '';
       };
 
-      shares = mkOption {
+      settings = lib.mkOption {
+        type = lib.types.submodule { freeformType = settingsFormat.type; };
         default = {};
-        description = ''
+        example = {
-          A set describing shared resources.
+          "global" = {
-          See {command}`man smb.conf` for options.
+            "security" = "user";
-        '';
+            "passwd program" = "/run/wrappers/bin/passwd %u";
-        type = types.attrsOf (types.attrsOf types.unspecified);
+            "invalid users" = "root";
-        example = literalExpression ''
+          };
-          { public =
+          "public" = {
-            { path = "/srv/public";
+            "path" = "/srv/public";
-              "read only" = true;
+            "read only" = "yes";
-              browseable = "yes";
+            "browseable" = "yes";
             "guest ok" = "yes";
-              comment = "Public samba share.";
+            "comment" = "Public samba share.";
           };
-          }
+        };
+        description = ''
+          Configuration file for the Samba suite in ini format.
+          This file is located in /etc/samba/smb.conf
+
+          Refer to <https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html>
+          for all available options.
         '';
       };
-
     };
 
   };

nixos/tests/samba.nix

@@ -1,15 +1,14 @@
-import ./make-test-python.nix ({ pkgs, ... }:
+import ./make-test-python.nix ({ pkgs, ... }: {
-
-{
   name = "samba";
 
   meta.maintainers = [ ];
 
-  nodes =
+  nodes = {
-    { client =
+    client =
-        { pkgs, ... }:
+      { ... }:
-        { virtualisation.fileSystems =
+      {
-            { "/public" = {
+        virtualisation.fileSystems = {
+          "/public" = {
             fsType = "cifs";
             device = "//server/public";
             options = [ "guest" ];
@@ -19,22 +18,26 @@ import ./make-test-python.nix ({ pkgs, ... }:
 
     server =
       { ... }:
-        { services.samba.enable = true;
+      {
-          services.samba.openFirewall = true;
+        services.samba = {
-          services.samba.shares.public =
+          enable = true;
-            { path = "/public";
+          openFirewall = true;
+          settings = {
+            "public" = {
+              "path" = "/public";
               "read only" = true;
-              browseable = "yes";
+              "browseable" = "yes";
               "guest ok" = "yes";
-              comment = "Public samba share.";
+              "comment" = "Public samba share.";
+            };
+          };
         };
       };
   };
 
   # client# [    4.542997] mount[777]: sh: systemd-ask-password: command not found
 
-  testScript =
+  testScript = ''
-    ''
     server.start()
     server.wait_for_unit("samba.target")
     server.succeed("mkdir -p /public; echo bar > /public/foo")