Rabbitmq cluster: Improve slugify function (#36)

Co-authored-by: Rainer 'rei' Schuth <rainer.schuth@digital-results-international.com>

Author: reixd

charts/rabbitmq-cluster/Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v2
 name: rabbitmq-cluster
 description: Helm chart to define a RabbitMQ cluster via official rabbitmq.com CRDs (RabbitmqCluster).
 type: application
-version: "2.3.0"
+version: "2.3.1"
 appVersion: "4.2-management"
 kubeVersion: ">= 1.33.0-0"
 home: https://www.rabbitmq.com/kubernetes/operator/operator-overview.html

charts/rabbitmq-cluster/templates/_klicktipp.tpl

@@ -3,6 +3,23 @@
 slugify the string to be (k8s) DNS name compatible
 */}}
 {{- define "com.klicktipp.slugify-string" -}}
-{{- $r := . | lower | replace "." "-" | replace "/" "-" | replace "_" "-" | replace " " "-" | replace "--" "-" | trimPrefix "-" | trunc 63 | trimSuffix "-" }}
-{{- $r }}
+{{- /* 1) Make sure we’re working with a string, and lowercase it */ -}}
+{{- $text := . | toString | lower -}}
+
+{{- /* 2) Replace “anything that is NOT a-z or 0-9” (in runs) with a dash */ -}}
+{{- $text = regexReplaceAll "[^a-z0-9]+" $text "-" -}}
+
+{{- /* 3) Remove dashes at the start or end */ -}}
+{{- $text = trimAll "-" $text -}}
+
+{{- /* 4) Limit to 63 characters, then remove a trailing dash if truncation created one */ -}}
+{{- $text = $text | trunc 63 | trimSuffix "-" -}}
+
+{{- /* Step 5: If nothing is left (e.g. input was only symbols), fail fast */ -}}
+{{- if eq $text "" -}}
+{{- fail "slugify: input became empty after sanitizing (must contain at least one a-z/0-9)" -}}
+{{- end -}}
+
+{{- /* Final: output the slug */ -}}
+{{- $text -}}
 {{- end -}}