fix idempotency with custom fact

tasks/install.yml

@@ -29,6 +29,7 @@
     with_items:
       - "{{ unifi_base_dir }}"
       - "{{ unifi_base_dir }}/{{ unifi_version }}"
+      - /etc/ansible/facts.d
   become: True
 
 - block:
@@ -44,19 +45,22 @@
       dest: "{{ unifi_base_dir }}/{{ unifi_version }}"
       remote_src: yes
 
-  - name: Create symlink for latest version
-    file:
-      src: "{{ unifi_base_dir }}/{{ unifi_version }}"
-      dest: "{{ unifi_base_dir }}/latest"
-      state: link
-    notify: __unifi_restart
-
   - name: Cleanup
     file:
       path: /tmp/UniFi.unix.zip
       state: absent
   become: True
   become_user: "{{ unifi_user }}"
+  when: ansible_local.unifi.version is is version_compare(unifi_version, ">")
+
+- name: Create symlink for latest version
+  file:
+    src: "{{ unifi_base_dir }}/{{ unifi_version }}"
+    dest: "{{ unifi_base_dir }}/latest"
+    state: link
+  notify: __unifi_restart
+  become: True
+  become_user: "{{ unifi_user }}"
 
 - block:
   - name: Create systemd unit files
@@ -73,4 +77,10 @@
       daemon_reload: yes
       enabled: yes
       name: unifi
+
+  - name: Set current version to custom fact
+    template:
+      src: etc/ansible/fact.d/unifi.json.j2
+      dest: /etc/ansible/fact.d/unifi.json
+    when: ansible_local.unifi.version is is version_compare(unifi_version, ">")
   become: True

templates/etc/ansible/fact.d/unifi.json.j2

@@ -0,0 +1,4 @@
+{
+  "comment" : "{{ ansible_managed }}"
+  "version" : "{{ unifi_version }}"
+}