Make tests for group membership more readable

lmn-client.yml

@@ -100,9 +100,9 @@
     - kerberize
     - lmn_security
     - role: lmn_localhome
-      when: groups.localhome is defined and inventory_hostname in groups.localhome
+      when: "'localhome' in group_names"
     - role: lmn_teacherlaptop
-      when: groups.teacherlaptop is defined and inventory_hostname in groups.teacherlaptop
+      when: "'teacherlaptop' in group_names"
 
   tasks:
     ## Temporary fixes and quirks:
@@ -157,7 +157,7 @@
             cmd: unzip -d /tmp/cb/ CodeBlocks.zip && dpkg -i cb/*.deb
             chdir: /tmp/
           when: new_codeblocks.changed | default(false)
-      when: groups.PCroom is defined and inventory_hostname in groups.PCroom
+      when: "'PCroom' in group_names"
 
 ## Clean up stuff from obsolete/faulty tasks:
     - name: Remove sddm login screen patch with deprecated marker (homeondisk)
@@ -301,7 +301,7 @@
       blockinfile:
         path: /etc/NetworkManager/NetworkManager.conf
         state: absent
-      when: groups.laptop is defined and inventory_hostname not in groups.laptop
+      when: "'laptop' not in group_names"
 
 ## bookworm fixes/hacks:
     - name: Work around sddm hang on shutdown
@@ -343,7 +343,7 @@
     - role: lmn_wlan_iwd
       when: ansible_interfaces | select('search', 'wl.+') | first is defined
     - role: lmn_localuser
-      when: not (groups.teacherlaptop is defined and inventory_hostname in groups.teacherlaptop)
+      when: "'teacherlaptop' not in group_names"
   tasks:
     - name: Remove deprecated files and directories (laptop-class)
       file: