users task: check if /etc/aliases exists

roles/users/tasks/main.yml

@@ -40,6 +40,11 @@
   when: item.sudo == true
   with_items: "{{ users }}"
 
+- name: Check if /etc/aliases exists
+  stat:
+    path: /etc/aliases
+  register: aliases
+
 - name: Set system email alias
   lineinfile:
     path: /etc/aliases
@@ -47,5 +52,7 @@
     regexp: "^{{ item.logname }}:"
     line: "{{ item.logname }}: {{ item.email }}"
   notify: Update aliases
-  when: item.email is defined
+  when:
+    - item.email is defined
+    - aliases.stat.exists
   with_items: "{{ users }}"