Take another pass at wiring up steps

plays/lib/database.yml

@@ -1,30 +1,34 @@
 ---
-- name: Setup preparatory facts
-  set_fact:
-    db_type: "{{ db['type'] }}"
-    mount_map:
-      mariadb: /var/lib/mysql
 
-- name: "Create {{ db_type }} database"
-  no_log: true
-  shell: "
-    dokku
-    {{ db_type }}:create
-    {{ app }}
-    --password {{ db_passwd }}
-    --root-password {{ root_db_passwd }}
-  "
-  args:
-    creates: "/var/lib/dokku/services/{{ db_type }}/{{ app }}"
+- name: Run database setup tasks
+  when: db is defined
+  block:
+    - name: Setup preparatory facts
+      set_fact:
+        db_type: "{{ db.type }}"
+        mount_map:
+          mariadb: /var/lib/mysql
 
-- name: Link mariadb database to application
-  dokku_service_link:
-    app: "{{ app }}"
-    name: "{{ app }}"
-    service: "{{ db_type }}"
+    - name: "Create {{ db_type }} database"
+      no_log: true
+      shell: "
+        dokku
+        {{ db_type }}:create
+        {{ app }}
+        --password {{ db_passwd }}
+        --root-password {{ root_db_passwd }}
+      "
+      args:
+        creates: "/var/lib/dokku/services/{{ db_type }}/{{ app }}"
 
-- name: "Specify {{ db_type }} volume mounts"
-  dokku_storage:
-    app: "{{ app }}"
-    mounts:
-      - "/var/lib/dokku/services/{{ db_type }}/{{ app }}:{{ mount_map[db_type] }}"
+    - name: Link mariadb database to application
+      dokku_service_link:
+        app: "{{ app }}"
+        name: "{{ app }}"
+        service: "{{ db_type }}"
+
+    - name: "Specify {{ db_type }} volume mounts"
+      dokku_storage:
+        app: "{{ app }}"
+        mounts:
+          - "/var/lib/dokku/services/{{ db_type }}/{{ app }}:{{ mount_map[db_type] }}"

plays/lib/domain.yml

@@ -1,8 +1,23 @@
 ---
-- name: "Configure {{ domain }} domain with Dokku"
+- name: "Configure {{ domain }} dedicated domain"
   dokku_domains:
     app: "{{ app }}"
     domains:
       - "{{ domain }}"
     state: present
   when: domain is defined
+
+- name: Provide information on domain configuration
+  debug:
+    msg:
+      - "Dedicated domain discovered for the deployment of {{ app }}"
+      - "Your application will be available at https://{{ domain }}"
+  when: domain is defined
+
+- name: Provide information on sub-domain configuration
+  debug:
+    msg:
+      - "No dedicated domain configured for the deployment of {{ app }}"
+      - "Dokku will provide a sub-domain configuration"
+      - "Your application will be available at https://{{ app }}.{{ dokku_hostname }}"
+  when: domain is not defined

plays/lib/prepare.yml

@@ -0,0 +1,9 @@
+---
+# Note(decentral1se): to avoid exploding when we import the config.yml from the
+# end-user, we spoof out variables that are referenced there but not populated
+# already (due to the order of the tasks we define for our deployment steps)
+- name: Export variable placeholders
+  set_fact:
+    dokku_db_addr: ""
+    dokku_db_user: ""
+    dokku_hostname: "{{ lookup('file', '/home/dokku/HOSTNAME') }}"

plays/lib/vars.yml

@@ -8,5 +8,5 @@
       - yaml
   with_items:
     - "{{ plugin_config_root }}"
-    # - "{{ app_config_root }}"
-    # - "{{ app_config_root }}/vault"
+    - "{{ app_config_root }}/vault"
+    - "{{ app_config_root }}"