feat(synapse): add ansible role

roles/synapse/tasks/check.yml

@@ -0,0 +1,32 @@
+---
+- name: Ensure synapse_state is valid
+  ansible.builtin.fail:
+    msg: "State '{{ synapse_state }}' is not known, supported states are {{ synapse_states | join(', ') }}"
+  when: synapse_state not in synapse_states
+
+- name: Ensure synapse deployment method is supported
+  ansible.builtin.fail:
+    msg: >-
+      Deployment method '{{ synapse_deployment_method }}'
+      is unknown! Supported methods are:
+      {{ synapse_deployment_methods | join(', ') }}
+  when: synapse_deployment_method not in synapse_deployment_methods
+
+- name: Ensure required variables are given
+  ansible.builtin.fail:
+    msg: "Required variable '{{ item }}' is undefined!"
+  loop: "{{ synapse_required_variables }}"
+  when: >-2
+    item not in hostvars[ansible_host]
+    or hostvars[ansible_host][item] | length == 0
+
+- name: Ensure conditionally required variables are given
+  ansible.builtin.fail:
+    msg: "Required variable '{{ item.name }}' is undefined!"
+  loop: "{{ synapse_conditionally_required_variables }}"
+  loop_control:
+    label: "{{ item.name }}"
+  when: >-2
+    item.when
+    and (item.name not in hostvars[ansible_host]
+        or hostvars[ansible_host][item.name] | length == 0)