Ansible can upgrade ownCloud if needed

upgrade.yml

@@ -18,3 +18,33 @@
       register: apt_result
       retries: 3
       until: apt_result is succeeded
+
+- hosts: owncloud-srv.adm.crans.org
+  vars:
+    # Owncloud command line interface
+    occ_bin: '/var/www/owncloud/occ'
+  tasks:
+    - name: Upgrade owncloud
+      command: "{{ occ_bin }} upgrade"
+      become: yes
+      become_user: www-data
+      register: upgrade_owncloud
+      failed_when:
+        # occ return code is 3 when ownCloud is already latest version
+        - upgrade_owncloud.rc != 0
+        - upgrade_owncloud.rc != 3
+
+    - name: Upgrade owncloud output
+      debug:
+        msg:
+          - "stdout: {{ upgrade_owncloud.stdout_lines }}"
+          - "stderr: {{ upgrade_owncloud.stderr_lines }}"
+      when: not ansible_check_mode
+
+    - name: Disable maintenance mode
+      command: "{{ occ_bin }} maintenance:mode --off"
+      become: yes
+      become_user: www-data
+      when:
+        # Maintenance mode has not been enabled.
+        - upgrade_owncloud.rc != 3