Merge pull request #90 from alxwr/fix-89

Fix #89 by ignoring only keys which are actually used in Pillar 'postfix:mapping'

pillar.example

@@ -235,3 +235,24 @@ postfix:
         - someuser_1@example.com
         - someuser_2@example.com
       - singlealiasexample: someuser_3@example.com
+
+
+###
+#
+# Multiple virtual_alias_maps entries:
+#
+# You are free to define alternative mapping names
+# and use them as 'variables' in your Postfix config:
+# (Credit for the idea and the example goes to @roskens.)
+
+postfix:
+  config:
+    virtual_alias_maps: $virtual_alias_1_maps $virtual_alias_2_maps
+    virtual_alias_1_maps: hash:/etc/postfix/virtual
+    virtual_alias_2_maps: pcre:/etc/postfix/virtual.pcre
+  mapping:
+    virtual_alias_1_maps:
+      root:
+        - me
+    virtual_alias_2_maps:
+      - '/(\S+)_(devel|preprod|prod)@sub.example.com$/': '$(1)@$(2).sub.example.com' 

postfix/files/main.cf

@@ -1,17 +1,8 @@
 {%- from "postfix/map.jinja" import postfix with context -%}
 {%- set config = salt['pillar.get']('postfix:config', {}) -%}
 
-{%- if not salt['pillar.get']('postfix:mapping', False) %}
-{#- Let the user configure mapping manually. -#}
-{%- set processed_parameters = [] %}
-{%- else -%}
-{#- TODO: alias_maps probably belongs here, too: #}
-{%- set processed_parameters = [
-        'virtual_alias_maps',
-        'smtp_sasl_password_maps',
-        'sender_canonical_maps',
-    ] %}
-{%- endif -%}
+{#- " | list": Python3.6 retuns dict_keys here, which needs to be converted into a list here. -#}
+{%- set processed_parameters = salt['pillar.get']('postfix:mapping', {}).keys() | list %}
 
 {%- macro set_parameter(parameter, default=None) -%}
 {% set value = config.get(parameter, default) %}

postfix/files/mapping.j2

@@ -21,6 +21,7 @@
 {%- else %}
 {#- Some settings need order, handle OrderedDict #}
 {% for item in data %}
-{{ format_value(item.keys()[0], item.values()[0]) }}
+{%-   set key, value = item.popitem() %}
+{{ format_value(key, value) }}
 {%- endfor -%}
 {%- endif %}