evomaintenance: install PG dependencies only when needed

CHANGELOG.md

@@ -51,6 +51,7 @@ The **patch** part changes incrementally at each release.
 * evolinux-base: use "evolinux_internal_group" for SSH authentication
 * evomaintenance: Turn on API by default (instead of DB)
 * evomaintenance: upstream version 0.6.0
+* evomaintenance: install PG dependencies only when needed
 * lxc-php: refactor tasks for better maintainability
 * lxc: rely on lxc_container module instead of command module
 * lxc: remove useless loop in apt execution

evomaintenance/tasks/install_vendor_debian.yml

@@ -3,13 +3,21 @@
 - name: Dependencies are installed
   apt:
     name:
-      - postgresql-client
       - sudo
       - curl
     state: present
   tags:
     - evomaintenance
 
+- name: PG dependencies are installed
+  apt:
+    name:
+      - postgresql-client
+    state: present
+  when: evomaintenance_hook_db
+  tags:
+    - evomaintenance
+
 - include_role:
     name: evolix/remount-usr
   tags: