9 core roles check their vars + 3 roles record to iiab_state.yml

roles/minetest/tasks/enable.yml

@@ -7,30 +7,10 @@
     state: restarted
   when: minetest_enabled | bool
 
-- name: Disable 'minetest-server' service
+- name: Disable & Stop 'minetest-server' service
   systemd:
     daemon_reload: yes
     name: minetest-server
     enabled: no
     state: stopped
   when: not minetest_enabled
-
-- name: Add 'minetest' variable values to {{ iiab_ini_file }}
-  ini_file:
-    path: "{{ iiab_ini_file }}"
-    section: minetest
-    option: "{{ item.option }}"
-    value: "{{ item.value | string }}"
-  with_items:
-    - option: name
-      value: Minetest Server
-    - option: description
-      value: '"Minetest is an open source clone of the Minecraft building blocks game."'
-    - option: minetest_world_dir
-      value: "{{ minetest_world_dir }}"
-    - option: minetest_port
-      value: "{{ minetest_port }}"
-    - option: minetest_enabled
-      value: "{{ minetest_enabled }}"
-    - option: minetest_world_dir
-      value: "{{ minetest_world_dir }}"

roles/minetest/tasks/main.yml

@@ -1,5 +1,48 @@
-- include_tasks: provision.yml
-  when: minetest_install and not minetest_installed is defined
+# "How do i fail a task in Ansible if the variable contains a boolean value?
+# I want to perform input validation for Ansible playbooks"
+# https://stackoverflow.com/questions/46664127/how-do-i-fail-a-task-in-ansible-if-the-variable-contains-a-boolean-value-i-want/46667499#46667499
 
-- include_tasks: enable.yml
-  when: minetest_install or minetest_installed is defined
+# We assume 0-init/tasks/validate_vars.yml has DEFINITELY been run, so no need
+# to re-check whether vars are defined here.  As Ansible vars cannot be unset:
+# https://serverfault.com/questions/856729/how-to-destroy-delete-unset-a-variable-value-in-ansible
+
+- name: Assert that "minetest_install is sameas true" (boolean not string etc)
+  assert:
+    that: minetest_install is sameas true
+    fail_msg: "PLEASE SET 'minetest_install: True' e.g. IN: /etc/iiab/local_vars.yml"
+    quiet: yes
+
+- name: Assert that "minetest_enabled | type_debug == 'bool'" (boolean not string etc)
+  assert:
+    that: minetest_enabled | type_debug == 'bool'
+    fail_msg: "PLEASE GIVE VARIABLE 'minetest_enabled' A PROPER (UNQUOTED) ANSIBLE BOOLEAN VALUE e.g. IN: /etc/iiab/local_vars.yml"
+    quiet: yes
+
+
+- name: Install Minetest if 'minetest_installed' not defined, e.g. in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
+  include_tasks: provision.yml    # i.e. install.yml in other roles
+  when: minetest_installed is undefined
+
+
+- include_tasks: enable.yml    # i.e. enable-or-disable.yml in other roles
+
+
+- name: Add 'minetest' variable values to {{ iiab_ini_file }}
+  ini_file:
+    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
+    section: minetest
+    option: "{{ item.option }}"
+    value: "{{ item.value | string }}"
+  with_items:
+    - option: name
+      value: Minetest Server
+    - option: description
+      value: '"Minetest is an open source clone of the Minecraft building blocks game."'
+    - option: minetest_world_dir
+      value: "{{ minetest_world_dir }}"
+    - option: minetest_port
+      value: "{{ minetest_port }}"
+    - option: minetest_enabled
+      value: "{{ minetest_enabled }}"
+    - option: minetest_world_dir
+      value: "{{ minetest_world_dir }}"