Add support for external config generation

README.rst

@@ -687,6 +687,32 @@ Disabled multipath (the default setup)
           multipath:
             enabled: false
 
+External config generation
+--------------------------
+
+You are able to use config support metadata between formulas and only generate
+config files for external use, eg. docker, etc.
+
+.. code-block:: yaml
+
+    parameters:
+      linux:
+        system:
+          config:
+            pillar:
+              jenkins:
+                master:
+                  home: /srv/volumes/jenkins
+                  approved_scripts:
+                    - method java.net.URL openConnection
+                  credentials:
+                    - type: username_password
+                      scope: global
+                      id: test
+                      desc: Testing credentials
+                      username: test
+                      password: test
+
 
 Usage
 =====

linux/system/config.sls

@@ -0,0 +1,33 @@
+{%- from "linux/map.jinja" import system with context %}
+{%- macro load_support_file(file, pillar, grains) %}{% include file %}{% endmacro %}
+
+{%- if system.enabled %}
+
+  {%- for config_name, config in system.get('config', {}).iteritems() %}
+    {%- if config.enabled|default(True) %}
+      {%- for service_name in config.pillar.keys() %}
+        {%- if pillar.get(service_name, {}).get('_support', {}).get('config', {}).get('enabled', False) %}
+          {%- set support_fragment_file = service_name+'/meta/config.yml' %}
+          {%- set service_config_files = load_support_file(support_fragment_file, config.pillar, config.get('grains', {}))|load_yaml %}
+          {%- for service_config_name, service_config in service_config_files.config.iteritems() %}
+
+{{ service_config.path }}:
+  file.managed:
+    - source: {{ service.config.source }}
+    {%- if service.config.template is defined %}
+    - template: {{ service.config.template }}
+    {%- endif %}
+    - makedirs: true
+    - defaults:
+        pillar: {{ config.pillar|yaml }}
+        grains: {{ config.get('grains', {}) }}
+
+          {%- endfor %}
+        {%- endif %}
+      {%- endfor %}
+    {%- else %}
+      {# TODO: configmap not using support between formulas #}
+    {%- endif %}
+  {%- endfor %}
+
+{%- endif %}

linux/system/init.sls

@@ -60,3 +60,6 @@ include:
 {%- if system.haveged is defined %}
 - linux.system.haveged
 {%- endif %}
+{%- if system.config is defined %}
+- linux.system.config
+{%- endif %}