Conditionally decide on how to operate on 'Desktop' for Ansible

.ansible/desktop.yaml

@@ -0,0 +1,10 @@
+- name: Desktop installation and configuration
+  hosts: desktop
+
+  roles:
+    - role: linux_desktop
+      when: ansible_system == 'Linux'
+    - role: jaredhocutt.gnome_extensions
+      when: ansible_system == 'Linux'
+    - role: mac_desktop
+      when: ansible_system == 'Darwin'

.ansible/inventory.yaml

@@ -1,9 +1,4 @@
-mac_desktops:
+desktop:
-  hosts:
-    localhost:
-      ansible_connection: local
-
-linux_desktops:
   hosts:
     localhost:
       ansible_connection: local

.ansible/linux_desktop.yaml

@@ -1,7 +0,0 @@
-- name: Linux desktops
-  hosts: linux_desktops
-  roles:
-    - linux_desktop
-    - jaredhocutt.gnome_extensions
-  vars:
-    gnome_extension_ids: "{{ gnome_extensions }}"

.ansible/mac_desktop.yaml

@@ -1,4 +0,0 @@
-- name: Mac desktops
-  hosts: mac_desktops
-  roles:
-    - mac_desktop

.ansible/roles/linux_desktop/vars/main.yaml

@@ -45,7 +45,7 @@ linux_apps:
   - skype
   - wireguard-ammp
 
-gnome_extensions:
+gnome_extension_ids:
   - 358    # activities configurator
   - 1206   # clock-override
   - 28     # gtile