Improve config.rst formatting (#72354)

* Indent Jinja2 directives.

* Show version_added and deprecations for ini settings and environment variables.

* Make default conditional, add choices. Copied from #55474.

* Add Ansible variables. Copied from #55474.

* Turn ini keys and environment variables into lists. Copied from #55474.

* Improve formatting. Copied from #55474.

docs/templates/config.rst.j2

@@ -111,22 +111,80 @@ you can use the command line utility mentioned above (`ansible-config`) to brows
 {%     if config['type'] %}
 :Type: {{config['type']}}
 {%     endif %}
+{%     if 'default' in config %}
 :Default: {{config['default']}}
+{%     endif %}
+{%     if config.get('choices', False) %}
+:Choices:
+{%       if config['choices'] is mapping %}
+{%         for key in config['choices'].keys() %}
+    - :{{key}}: {{ config['choices'][key] }}
+{%         endfor %}
+{%       else %}
+{%         for key in config['choices'] %}
+    - :{{key}}:
+{%         endfor %}
+{%       endif %}
+{%     endif %}
 {%     if config['version_added'] %}
 :Version Added: {{config['version_added']}}
 {%     endif %}
+{%     if config.get('ini', False) %}
+:Ini:
 {%       for ini_map in config['ini']|sort(attribute='section') %}
-:Ini Section: {{ini_map['section']}}
-:Ini Key: {{ini_map['key']}}
+     {% if config['ini']|length > 1 %}- {% endif %}:Section: [{{ini_map['section']}}]
+     {% if config['ini']|length > 1 %}  {% endif %}:Key: {{ini_map['key']}}
+{%         if ini_map['version_added'] %}
+       :Version Added: {{ini_map['version_added']}}
+{%         endif %}
+{%         if ini_map['deprecated'] %}
+       :Deprecated in: {{ini_map['deprecated']['version']}}
+       :Deprecated detail: {{ini_map['deprecated']['why']}}
+{%           if ini_map['deprecated']['alternatives'] %}
+       :Deprecated alternatives: {{ini_map['deprecated']['alternatives']}}
+{%           endif %}
+{%         endif %}
 {%       endfor %}
+{%     endif %}
+{%     if config.get('env', False) %}
+:Environment:
 {%       for env_var_map in config['env']|sort(attribute='name') %}
-:Environment: :envvar:`{{env_var_map['name']}}`
+     {% if config['env']|length > 1 %}- {% endif %}:Variable: :envvar:`{{env_var_map['name']}}`
+{%         if env_var_map['version_added'] %}
+       :Version Added: {{env_var_map['version_added']}}
+{%         endif %}
+{%         if env_var_map['deprecated'] %}
+       :Deprecated in: {{env_var_map['deprecated']['version']}}
+       :Deprecated detail: {{env_var_map['deprecated']['why']}}
+{%           if env_var_map['deprecated']['alternatives'] %}
+       :Deprecated alternatives: {{env_var_map['deprecated']['alternatives']}}
+{%           endif %}
+{%         endif %}
 {%       endfor %}
+{%     endif %}
+{%     if config.get('vars', False) %}
+:Variables:
+{%       for a_var in config['vars']|sort(attribute='name') %}
+     {% if config['vars']|length > 1 %}- {%endif%}:name: `{{a_var['name']}}`
+{%       if a_var['version_added'] %}
+       :Version Added: {{a_var['version_added']}}
+{%       endif %}
+{%         if a_var['deprecated'] %}
+       :Deprecated in: {{a_var['deprecated']['version']}}
+       :Deprecated detail: {{a_Var['deprecated']['why']}}
+{%           if a_var['deprecated']['alternatives'] %}
+       :Deprecated alternatives: {{a_var['deprecated']['alternatives']}}
+{%           endif %}
+{%         endif %}
+{%       endfor %}
+{%     endif %}
 {%     if config['deprecated'] %}
 :Deprecated in: {{config['deprecated']['version']}}
 :Deprecated detail: {{config['deprecated']['why']}}
+{%       if config['deprecated']['alternatives'] %}
 :Deprecated alternatives: {{config['deprecated']['alternatives']}}
 {%       endif %}
+{%     endif %}
 
 {%   endfor %}
 
@@ -151,6 +209,17 @@ Environment Variables
 
     See also :ref:`{{config_option}} <{{config_option}}>`
 
+{%       if env_var_map['version_added'] %}
+    :Version Added: {{env_var_map['version_added']}}
+{%       endif %}
+{%       if env_var_map['deprecated'] %}
+    :Deprecated in: {{env_var_map['deprecated']['version']}}
+    :Deprecated detail: {{env_var_map['deprecated']['why']}}
+{%         if env_var_map['deprecated']['alternatives'] %}
+    :Deprecated alternatives: {{env_var_map['deprecated']['alternatives']}}
+{%         endif %}
+{%       endif %}
+
 {%     endfor %}
 
 {%   endfor %}

lib/ansible/config/base.yml

@@ -852,9 +852,9 @@ DEFAULT_LIBVIRT_LXC_NOSECLABEL:
   env:
   - name: LIBVIRT_LXC_NOSECLABEL
     deprecated:
-      why: environment variables without "ANSIBLE_" prefix are deprecated
+      why: environment variables without ``ANSIBLE_`` prefix are deprecated
       version: "2.12"
-      alternatives: the "ANSIBLE_LIBVIRT_LXC_NOSECLABEL" environment variable
+      alternatives: the ``ANSIBLE_LIBVIRT_LXC_NOSECLABEL`` environment variable
   - name: ANSIBLE_LIBVIRT_LXC_NOSECLABEL
   ini:
   - {key: libvirt_lxc_noseclabel, section: selinux}
@@ -1342,9 +1342,9 @@ DISPLAY_SKIPPED_HOSTS:
   env:
   - name: DISPLAY_SKIPPED_HOSTS
     deprecated:
-      why: environment variables without "ANSIBLE_" prefix are deprecated
+      why: environment variables without ``ANSIBLE_`` prefix are deprecated
       version: "2.12"
-      alternatives: the "ANSIBLE_DISPLAY_SKIPPED_HOSTS" environment variable
+      alternatives: the ``ANSIBLE_DISPLAY_SKIPPED_HOSTS`` environment variable
   - name: ANSIBLE_DISPLAY_SKIPPED_HOSTS
   ini:
   - {key: display_skipped_hosts, section: defaults}
@@ -1695,9 +1695,9 @@ NETWORK_GROUP_MODULES:
   env:
   - name: NETWORK_GROUP_MODULES
     deprecated:
-      why: environment variables without "ANSIBLE_" prefix are deprecated
+      why: environment variables without ``ANSIBLE_`` prefix are deprecated
       version: "2.12"
-      alternatives: the "ANSIBLE_NETWORK_GROUP_MODULES" environment variable
+      alternatives: the ``ANSIBLE_NETWORK_GROUP_MODULES`` environment variable
   - name: ANSIBLE_NETWORK_GROUP_MODULES
   ini:
   - {key: network_group_modules, section: defaults}