Merge branch 'chgvncserer' into 'master'

setting default xsessionmanager via update alternatives rather than changing...

See merge request !510

roles/vncserver/tasks/main.yml

@@ -5,16 +5,30 @@
   when: ansible_distribution == "CentOS" and ansible_distribution_major_version == "7"
 
 - name: install system packages apt
-  apt: name={{ system_packages }} state=present update_cache=true  force=yes
+  apt: name={{ system_packages }} state=present update_cache=true
   become: true
   when: ansible_os_family == 'Debian'
 
-- name: force the use of KDE desktop
-  template: src=vncserver.centos dest=/bin/vncserver
+- name: force the use of mate desktop
+  template:
+    src: vncserver.ubuntu
+    dest: /usr/bin/vncserver
+    owner: root
+    group: root
+    mode: u=rxw,g=rx,o=rx
   become: true
-  when: ansible_os_family == 'RedHat'
+  when: ansible_os_family == 'Debian'
 
-- name: force the use of mate desktop
-  template: src=vncserver.ubuntu dest=/usr/bin/vncserver
+- name: query the default x-session
+  shell: update-alternatives --query x-session-manager | grep Value
   become: true
+  check_mode: no
+  changed_when: false
+  register: qxsessionmanager
   when: ansible_os_family == 'Debian'
+
+- name: make mate the default x-session
+  shell: update-alternatives --set x-session-manager /usr/bin/mate-session
+  become: true
+  when: ansible_os_family == 'Debian' and "mate" not in qxsessionmanager.stdout 
+