wp-base-chart/www-example-com/templates/_helpers.tpl

{{- define "chart.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
{{- end }}

{{- define "chart.fullname" -}}
{{- if .Values.fullnameOverride }}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
{{- else }}
{{- printf "%s-%s" .Release.Name (include "chart.name" .) | trunc 63 | trimSuffix "-" }}
{{- end }}
{{- end }}

{{- define "chart.namespace" -}}
{{- default .Release.Namespace .Values.namespaceOverride }}
{{- end }}

{{- define "chart.labels" -}}
helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
app.kubernetes.io/name: {{ include "chart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
{{- end }}

{{- define "chart.selector" -}}
app.kubernetes.io/name: {{ include "chart.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
{{- end }}