feat(helpers): sort schema apply sequence

Custom schema filenames are inserted into LDAP_EXTRA_SCHEMAS in an
unsorted fashion, causing inconsistencies every time a new schema is
added, or even in a different version of the helm.
This commit enable customSchemaFiles keys sorting, allowing control over
the loading sequence and using dependent custom schemas.

Author: Arano-kai

templates/_helpers.tpl

@@ -188,7 +188,7 @@ Cannot return list => return string comma separated
 */}}
 {{- define "openldap.customSchemaFiles" -}}
   {{- $schemas := "" -}}
-  {{- $schemas := ((join "," (.Values.customSchemaFiles | keys))  | replace ".ldif" "") -}}
+  {{- $schemas := ((join "," (.Values.customSchemaFiles | keys | sortAlpha))  | replace ".ldif" "") -}}
   {{- print $schemas -}}
 {{- end -}}
 

values.yaml

@@ -121,6 +121,8 @@ pdb:
 # group: readers
 
 # Custom openldap schema files used to be used in addition to default schemas
+# Note that the supplied files are sorted by name and inserted into 'LDAP_EXTRA_SCHEMAS' env var
+# after chart default schemas, allowing you to control the loading sequence.
 # customSchemaFiles:
 #   custom.ldif: |-
 #     # custom schema