[tutorial Rougail 4.2] conditional disabled + hidden

NFS configuration
=================

Need could be activated. In this case, we need to add server domain name

Examples of Ops inventory file
==============================

1/ VALID:

---
env_nfs:
  configure: false

2/ INVALID, configure is false but default:

env_nfs:
  server: another-nfs.silique.fr

3/ VALID:

---
env_nfs:
  configure: true

4/ VALID

env_nfs:
  configure: true
  server: another-nfs.silique.fr

Rougail/socle/06-nfs.yml

@@ -20,3 +20,14 @@ env_nfs:
         {% if not socle.env_nfs.configure %}
         NFS is disabled
         {% endif %}
+  device:
+    default:
+      type: jinja
+      jinja: "{{ socle.env_nfs.server }}:/nfs"
+    hidden: true
+    disabled:
+      type: jinja
+      jinja: |
+        {% if not socle.env_nfs.configure %}
+        NFS is disabled
+        {% endif %}