Link plugin settings extension separately

At the moment Horizon plugins' local_settings are being symlinked
to the enabled folder, which is not entirely correct.

Today Horizon will produce a warning message during compression in
case a settings file will be present in enabled folder, ie:

WARNING:root:Skipping openstack_dashboard.local.enabled._1699_orchestration_settings because it doesn't have DASHBOARD, PANEL, PANEL_GROUP, or FEATURE defined.

To avoid such warning settings files are being search and symlinked
independently now.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-openstack_hosts/+/930272
Change-Id: I5b50bad91f00cd4f5b5c36e30753e88425cf9d13

tasks/horizon_post_install_source.yml

@@ -51,6 +51,21 @@
     use_regex: yes
   register: found_panels
 
+- name: Registering settings
+  find:
+    paths: |-
+      {% set dashboard_path = [] %}
+      {% for dashboard in found_dashboards.files %}
+      {%   for path in _dashboard_settings_location %}
+      {%     set _ = dashboard_path.append(dashboard.path + path) %}
+      {%   endfor %}
+      {% endfor %}
+      {{ dashboard_path }}
+    patterns: ["^_[0-9]{2,4}_.*.py$"]
+    file_type: file
+    use_regex: yes
+  register: found_settings
+
 - name: Registering default policy files
   find:
     paths: |-
@@ -99,6 +114,16 @@
   notify:
     - Compile messages
 
+- name: Enable project settings
+  file:
+    src: "{{ item.path }}"
+    path: "{{ horizon_dashboard_settings_dir }}/{{ item.path | basename }}"
+    state: link
+  with_items: "{{ found_settings.files }}"
+  notify:
+    - Compile messages
+    - Restart wsgi process
+
 - name: Enable project panels
   file:
     src: "{{ item.path }}"

vars/main.yml

@@ -39,6 +39,7 @@ _horizon_translations_pull:
     module: trove_dashboard
 
 horizon_dashboard_panel_dir: "{{ horizon_lib_dir }}/openstack_dashboard/local/enabled"
+horizon_dashboard_settings_dir: "{{ horizon_lib_dir }}/openstack_dashboard/local/local_settings.d"
 horizon_manage: "{{ horizon_bin }}/horizon-manage.py"
 
 _horizon_uwsgi_ini_requirements:

vars/source_install.yml

@@ -27,6 +27,8 @@ _horizon_bin: "/openstack/venvs/horizon-{{ horizon_venv_tag }}/bin"
 _dashboard_panels_location:
   - "/enabled"
   - "/conf"
-  - "/local_settings.d"
   - "/local/enabled"
+
+_dashboard_settings_location:
+  - "/local_settings.d"
   - "/local/local_settings.d"