feat(t8s-common): add helm templates

charts/t8s-common/templates/_helm.tpl

@@ -0,0 +1,35 @@
+{{/*
+Creates a labels block for a HelmRelease resource.
+{{ include "common.helm.labels" (dict) -}}
+*/}}
+{{- define "common.helm.labels" -}}
+  {{- include "common.labels.standard" (dict "Release" (dict "Name" "{{ .Release.Name }}" "Service" "{{ .Release.Service }}") "Chart" (dict "Name" "{{ .Chart.Name }}" "Version" "{{ .Chart.Version }}") "Values" (dict)) -}}
+{{- end -}}
+
+{{/*
+Returns the chart version for a given chart in a given repository.
+{{ include "common.helm.chartVersion" (dict "context" $ "repo" "bitnami" "chart" "redis") -}}
+*/}}
+{{- define "common.helm.chartVersion" -}}
+  {{- $_ := set . "Values" .context.Values -}}
+  {{- dig .repo "charts" .chart nil .Values.global.helmRepositories | required (printf "The repo '%s' is either missing or doesn't contain the chart '%s'" .repo .chart) -}}
+{{- end -}}
+
+{{/*
+Returns a HelmRelease.spec.chart.spec for a given chart in a given repository.
+{{ include "common.helm.chartSpec" (dict "context" $ "repo" "bitnami" "chart" "redis" "prependReleaseName" true) -}}
+*/}}
+{{- define "common.helm.chartSpec" -}}
+  {{- $_ := set . "Release" .context.Release -}}
+  {{- dict
+        "chart" .chart
+        "version" (include "common.helm.chartVersion" (dict "repo" .repo "chart" .chart "context" .context))
+        "sourceRef" (dict
+          "kind" "HelmRepository"
+          "name" (eq .prependReleaseName true | ternary (printf "%s-%s" .Release.Name .repo) .repo)
+          "namespace" .Release.Namespace
+        )
+      | toYaml
+   -}}
+{{- end -}}
+