add optional context variable "colon" to mapping.j2 for aliases file

postfix/aliases

@@ -1,3 +0,0 @@
-# Managed by config management
-# See man 5 aliases for format
-{{pillar['postfix']['aliases']['content']}}

postfix/files/mapping.j2

@@ -1,11 +1,14 @@
 # Managed by config management
 
+{%- if colon is not defined %}
+  {%- set colon = False %}
+{%- endif %}
 {%- macro format_value(key, value) %}
   {#- Some settings, like virtual_alias_maps can take multiple values. Handle this case. -#}
   {%- if value is iterable and value is not string -%}
-{{ key }}	{{ value|join(", ") }}
+{{ key }}{% if colon %}:{% endif %}	{{ value|join(", ") }}
   {%- else -%}
-{{ key }}	{{ value }}
+{{ key }}{% if colon %}:{% endif %}	{{ value }}
   {%- endif -%}
 {%- endmacro %}
 

postfix/init.sls

@@ -31,11 +31,14 @@ postfix:
 postfix_alias_database:
   file.managed:
     - name: {{ file_path }}
-    - source: salt://postfix/aliases
+    - source: salt://postfix/files/mapping.j2
     - user: root
     - group: {{ postfix.root_grp }}
     - mode: 644
     - template: jinja
+    - context:
+        data: {{ salt['pillar.get']('postfix:aliases:present') }}
+        colon: True
     - require:
       - pkg: postfix
   {%- if need_newaliases %}