add proof of concept

roles/grub/defaults/main.yml

@@ -0,0 +1,4 @@
+system:
+    shutdown: reboot
+    grub:
+        timeout: 0

roles/grub/handlers/main.yml

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+- name: Update GRUB
+  command: update-grub
+  failed_when: ('error' in grub_register_update.stderr)
+  register: grub_register_update
+
+  # TODO: Do we need to use grub-set-default?
+  # https://github.com/yavdr/yavdr-utils/blob/master/events/actions/update-grub

roles/grub/tasks/main.yml

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+- name: custom grub configuration for timeout and reboot halt
+  template:
+    src: templates/50_custom.j2
+    dest: /etc/grub.d/50_custom
+    mode: '0775'
+  notify: [ 'Update GRUB' ]
+
+- name: let the system boot quietly
+  lineinfile:
+      dest: /etc/default/grub
+      state: present
+      regexp: '^(GRUB_CMDLINE_LINUX_DEFAULT=")'
+      line: '\1quiet nosplash"'
+      backrefs: yes
+  notify: [ 'Update GRUB' ]

roles/grub/templates/50_custom.j2

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+#!/bin/sh
+exec tail -n +3 $0
+
+# This file is configured by the ansible configuration for yaVDR
+
+{% if system.shutdown is defined and system.shutdown == 'reboot' %}
+menuentry "PowerOff" {
+    halt
+}
+{% endif %}
+
+if [ "${recordfail}" = 1 ]; then
+    set timeout={{ 3 if system.grub.timeout < 3 else system.grub.timeout }}
+else
+    set timeout={{ system.grub.timeout if system.grub.timeout is defined else 0 }}
+fi
+