Do not deprecate directory argument

lib/build-clan/default.nix

@@ -8,8 +8,9 @@
 }:
 {
   ## Inputs
-  directory ? null, # The directory containing the machines subdirectory # allows to include machine-specific modules i.e. machines.${name} = { ... }
-  self ? null,
+  self ? null, # Reference to the current flake
+  directory ? null, # the directory containing the machines subdirectory. Optional: can be used if the machines is not in the root of the flake
+  # allows to include machine-specific modules i.e. machines.${name} = { ... }
   # A map from arch to pkgs, if specified this nixpkgs will be only imported once for each system.
   # This improves performance, but all nipxkgs.* options will be ignored.
   # deadnix: skip
@@ -20,27 +21,23 @@
   ...
 }@attrs:
 let
-  evalUnchecked = import ./eval.nix {
+  eval = import ./eval.nix {
     inherit
       lib
       nixpkgs
       clan-core
       ;
     inherit specialArgs;
-    self = if self != null then self else directory;
+    self =
+      if self == null then
+        lib.warn "The buildClan function requires argument 'self' to be set to the current flake" {
+          inputs = { };
+        }
+      else
+        self;
+    directory = if directory == null then self else directory;
   };
 
-  # Doing `self ? lib.trace "please use self" directory`, doesn't work
-  # as when both (directory and self) are set we get an infinite recursion error
-  eval =
-    if directory == null && self == null then
-      throw "The buildClan function requires argument 'self' to be set"
-    else if directory != null && self != null then
-      throw "Both 'self' and 'directory' are set, please remove 'directory' in favor of the 'self' argument"
-    else if directory != null then
-      lib.warn "The 'directory' argument in buildClan has been deprecated in favor of the 'self' argument" evalUnchecked
-    else
-      evalUnchecked;
   rest = builtins.removeAttrs attrs [ "specialArgs" ];
 in
 eval {

lib/build-clan/eval.nix

@@ -2,8 +2,9 @@
   lib,
   nixpkgs,
   clan-core,
-  specialArgs ? { },
   self,
+  directory ? null,
+  specialArgs ? { },
 }:
 # Returns a function that takes self, which should point to the directory of the flake
 module:
@@ -14,6 +15,9 @@ module:
   modules = [
     ./interface.nix
     module
-    { inherit specialArgs; }
+    {
+      inherit specialArgs;
+      directory = lib.mkIf (directory != null) directory;
+    }
   ];
 }).config

lib/build-clan/interface.nix

@@ -9,8 +9,18 @@ in
 {
   options = {
     self = lib.mkOption {
-      type = types.path;
+      type = types.raw;
       default = self;
+      readOnly = true;
+      defaultText = "Reference to the current flake";
+      description = ''
+        This is used to import external clan modules.
+      '';
+    };
+
+    directory = lib.mkOption {
+      type = types.path;
+      default = builtins.toString self;
       defaultText = "Root directory of the flake";
       description = ''
         The directory containing the clan.

lib/build-clan/module.nix

@@ -7,7 +7,7 @@
 }:
 let
   inherit (config)
-    self
+    directory
     machines
     pkgsForSystem
     specialArgs
@@ -44,7 +44,7 @@ let
   serviceConfigs = (
     buildInventory {
       inherit inventory;
-      inherit self;
+      inherit directory;
     }
   );
 
@@ -59,14 +59,14 @@ let
     nixpkgs.lib.nixosSystem {
       modules =
         let
-          hwConfig = "${self}/machines/${name}/hardware-configuration.nix";
-          diskoConfig = "${self}/machines/${name}/disko.nix";
+          hwConfig = "${directory}/machines/${name}/hardware-configuration.nix";
+          diskoConfig = "${directory}/machines/${name}/disko.nix";
         in
         [
           {
             # Autoinclude configuration.nix and hardware-configuration.nix
             imports = builtins.filter builtins.pathExists [
-              "${self}/machines/${name}/configuration.nix"
+              "${directory}/machines/${name}/configuration.nix"
               hwConfig
               diskoConfig
             ];
@@ -81,7 +81,7 @@ let
             {
               # Settings
               clan.core.settings = {
-                directory = self;
+                inherit directory;
                 inherit (config.inventory.meta) name icon;
 
                 machine = {
@@ -160,7 +160,7 @@ let
     ) supportedSystems
   );
 
-  inventoryFile = "${self}/inventory.json";
+  inventoryFile = "${directory}/inventory.json";
 
   inventoryLoaded =
     if builtins.pathExists inventoryFile then
@@ -172,7 +172,6 @@ in
 {
   imports = [
     ./auto-imports.nix
-    (lib.mkRenamedOptionModule [ "directory" ] [ "self" ])
     # Merge the inventory file
     {
       inventory = _: {
@@ -182,9 +181,9 @@ in
     }
     # TODO: Figure out why this causes infinite recursion
     {
-      inventory.machines = lib.optionalAttrs (builtins.pathExists "${self}/machines") (
+      inventory.machines = lib.optionalAttrs (builtins.pathExists "${directory}/machines") (
         builtins.mapAttrs (_n: _v: { }) (
-          (lib.filterAttrs (_: t: t == "directory") (builtins.readDir "${self}/machines"))
+          lib.filterAttrs (_: t: t == "directory") (builtins.readDir "${directory}/machines")
         )
       );
     }

lib/build-clan/tests.nix

@@ -16,6 +16,10 @@ in
   test_only_required =
     let
       config = evalClan {
+        self = {
+          inputs = { };
+        };
+        directory = ./.;
         meta.name = "test";
         imports = [ ./module.nix ];
       };
@@ -28,7 +32,10 @@ in
   test_all_simple =
     let
       config = evalClan {
-        self = ./.;
+        self = {
+          inputs = { };
+        };
+        directory = ./.;
         machines = { };
         inventory = {
           meta.name = "test";
@@ -43,6 +50,10 @@ in
   test_outputs_clanInternals =
     let
       config = evalClan {
+        self = {
+          inputs = { };
+        };
+        directory = ./.;
         imports = [
           # What the user needs to specif
           {
@@ -68,6 +79,9 @@ in
   test_fn_simple =
     let
       result = buildClan {
+        self = {
+          inputs = { };
+        };
         directory = ./.;
         meta.name = "test";
       };
@@ -84,6 +98,9 @@ in
   test_fn_extensiv_meta =
     let
       result = buildClan {
+        self = {
+          inputs = { };
+        };
         directory = ./.;
         meta.name = "test";
         meta.description = "test";
@@ -104,6 +121,9 @@ in
   test_fn_clan_core =
     let
       result = buildClan {
+        self = {
+          inputs = { };
+        };
         directory = ../../.;
         meta.name = "test-clan-core";
       };
@@ -119,6 +139,9 @@ in
   test_buildClan_all_machines =
     let
       result = buildClan {
+        self = {
+          inputs = { };
+        };
         directory = ./.;
         meta.name = "test";
         inventory.machines.machine1.meta.name = "machine1";
@@ -138,6 +161,9 @@ in
   test_buildClan_specialArgs =
     let
       result = buildClan {
+        self = {
+          inputs = { };
+        };
         directory = ./.;
         meta.name = "test";
         specialArgs.foo = "dream2nix";

lib/inventory/build-inventory/default.nix

@@ -197,7 +197,7 @@ let
     machinesFromInventory :: Inventory -> { ${machine_name} :: NixOSConfiguration }
   */
   buildInventory =
-    { inventory, self }:
+    { inventory, directory }:
     # For every machine in the inventory, build a NixOS configuration
     # For each machine generate config, forEach service, if the machine is used.
     builtins.mapAttrs (
@@ -207,8 +207,8 @@ let
           machineName
           machineConfig
           inventory
+          directory
           ;
-        directory = self;
       }
     ) (inventory.machines or { });
 in

lib/inventory/tests/default.nix

@@ -13,14 +13,14 @@ in
     # Empty inventory should return an empty module
     expr = buildInventory {
       inventory = { };
-      self = ./.;
+      directory = ./.;
     };
     expected = { };
   };
   test_inventory_role_imports =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {
@@ -62,7 +62,7 @@ in
   test_inventory_tag_resolve =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {
@@ -102,7 +102,7 @@ in
   test_inventory_multiple_roles =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {
@@ -132,7 +132,7 @@ in
   test_inventory_module_doesnt_exist =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {
@@ -157,7 +157,7 @@ in
   test_inventory_role_doesnt_exist =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {
@@ -183,7 +183,7 @@ in
   test_inventory_tag_doesnt_exist =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {
@@ -211,7 +211,7 @@ in
   test_inventory_disabled_service =
     let
       configs = buildInventory {
-        self = ./.;
+        directory = ./.;
         inventory = {
           modules = clan-core.clanModules;
           services = {