background image file from repository

defaults/main.yml

@@ -3,6 +3,5 @@ display_manager_state: multiuser
 display_manager_mainentance_text: Wartungsmodus – bitte nicht abschalten!
 display_manager_mainentance_icon: preferences-system
 
-display_manager_background_image_url: https://upload.wikimedia.org/wikipedia/commons/5/52/Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg
-display_manager_background_image_path: /usr/share/lightdm/background.jpg
-display_manager_background_image_checksum: sha256:df1106e46a2cb9ec46fb50c415f9648270bafb11c0762072f9804f8d1705e4b5
+display_manager_background_image: Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg
+# source: https://upload.wikimedia.org/wikipedia/commons/5/52/Hubble2005-01-barred-spiral-galaxy-NGC1300.jpg

tasks/main.yml

@@ -50,11 +50,15 @@
   when: display_setup_commands is defined
   notify: restart lightdm
 
-- name: download background image
-  get_url:
-    url: "{{display_manager_background_image_url}}"
-    dest: "{{display_manager_background_image_path}}"
-    checksum: "{{display_manager_background_image_checksum}}"
+- name: background image directory
+  file:
+    path: /usr/share/lightdm/background
+    state: directory
+
+- name: background image
+  copy:
+    src: "{{display_manager_background_image}}"
+    dest: "/usr/share/lightdm/background/{{display_manager_background_image}}"
 
 - name: lightdm started
   service:

templates/lightdm-gtk-greeter.conf.j2

@@ -47,7 +47,7 @@
 #  transition-duration = overrides default value
 #
 [greeter]
-background={{display_manager_background_image_path}}
+background=/usr/share/lightdm/background/{{display_manager_background_image}}
 user-background=false
 #theme-name=
 #icon-theme-name=