api/tags: split list into options and non-configurable tags

pkgs/clan-cli/clan_lib/tags/list.py

@@ -1,3 +1,4 @@
+from dataclasses import dataclass
 from typing import Any
 
 from clan_lib.api import API
@@ -5,8 +6,14 @@ from clan_lib.flake import Flake
 from clan_lib.persist.inventory_store import InventoryStore
 
 
+@dataclass
+class TagList:
+    options: set[str]
+    special: set[str]
+
+
 @API.register
-def list_tags(flake: Flake) -> set[str]:
+def list_tags(flake: Flake) -> TagList:
     inventory_store = InventoryStore(flake=flake)
     inventory = inventory_store.read()
 
@@ -28,7 +35,11 @@ def list_tags(flake: Flake) -> set[str]:
                 tags.add(tag)
 
     global_tags = inventory.get("tags", {})
-    for tag in global_tags:
-        tags.add(tag)
 
-    return tags
+    for tag in global_tags:
+        if tag not in tags:
+            continue
+
+        tags.remove(tag)
+
+    return TagList(options=tags, special=set(global_tags.keys()))

pkgs/clan-cli/clan_lib/tags/list_test.py

@@ -55,13 +55,8 @@ def test_list_inventory_tags(clan_flake: Callable[..., Flake]) -> None:
 
     tags = list_tags(flake)
 
-    assert tags == set(
+    assert tags.options == set(
         {
-            # Predefined tags
-            "all",
-            "global",
-            "darwin",
-            "nixos",
             # Tags defined in nix
             "bar",
             "baz",
@@ -76,3 +71,13 @@ def test_list_inventory_tags(clan_flake: Callable[..., Flake]) -> None:
             "managed2",
         }
     )
+
+    assert tags.special == set(
+        {
+            # Predefined tags
+            "all",
+            "global",
+            "darwin",
+            "nixos",
+        }
+    )