Make tests for group membership more readable

roles/lmn_networkd/tasks/main.yml

@@ -12,7 +12,7 @@
       ipv4.route-metric=2048
       [keyfile]
       unmanaged-devices=interface-name:en*;interface-name:vm*
-  when: groups.teacherlaptop is defined and inventory_hostname in groups.teacherlaptop
+  when: "'teacherlaptop' in group_names"
 
 - name: Use iwd for USB-Wlan-Sticks but ignore interfaces managed by systemd-networkd (wlan0,en*)
   blockinfile:
@@ -26,7 +26,7 @@
       ipv4.route-metric=2048
       [keyfile]
       unmanaged-devices=interface-name:wlan0;interface-name:en*;interface-name:vm*
-  when: not (groups.teacherlaptop is defined and inventory_hostname in groups.teacherlaptop)
+  when: "'teacherlaptop' not in group_names"
 
 - name: Enable Networkmanager
   ansible.builtin.systemd:
@@ -59,7 +59,7 @@
        Name=enx{{ ansible_facts[ansible_interfaces | select('search', '^enp.*') | first].macaddress | replace(':','') }}
        [Network]
        Bridge=virbr1
-  when: groups.teacherlaptop is defined and inventory_hostname in groups.teacherlaptop
+  when: "'teacherlaptop' in group_names"
 
 - name: Configure systemd-networkd ethernet.network
   ansible.builtin.copy:
@@ -113,7 +113,7 @@
        DHCP=yes
        [DHCPv4]
        UseDomains=true
-  when: not (groups.teacherlaptop is defined and inventory_hostname in groups.teacherlaptop)
+  when: "'teacherlaptop' not in group_names"
 
 - name: Enable systemd-networkd
   ansible.builtin.systemd: