LN: configure "color" based on namespace

Author: pinheadmz

resources/charts/bitcoincore/charts/lnd/templates/_helpers.tpl

@@ -76,3 +76,12 @@ Create the name of the service account to use
 {{- default "default" .Values.serviceAccount.name }}
 {{- end }}
 {{- end }}
+
+{{/*
+Create a hex-encoded RGB color derived from the namespace
+*/}}
+{{- define "namespace.color" -}}
+{{- $hash := sha256sum .Release.Namespace -}}
+{{- printf "#%s" (substr 0 6 $hash) -}}
+{{- end -}}
+

resources/charts/bitcoincore/charts/lnd/templates/configmap.yaml

@@ -16,6 +16,7 @@ data:
     bitcoind.zmqpubrawblock=tcp://{{ include "bitcoincore.fullname" . }}:{{ .Values.global.ZMQBlockPort }}
     bitcoind.zmqpubrawtx=tcp://{{ include "bitcoincore.fullname" . }}:{{ .Values.global.ZMQTxPort }}
     alias={{ include "lnd.fullname" . }}.{{ .Release.Namespace }}
+    color={{ include "namespace.color" . }}
     externalhosts={{ include "lnd.fullname" . }}
     tlsextradomain={{ include "lnd.fullname" . }}
   tls.cert: |