bigbang 3rd party package chart not properly passing some toplevel chart values to subpackages

Bug

Description

While working on Jira #67 I discovered that some of the builtin networkPolicies do not function because the controlPlaneCidr is not properly inherited from the parent chart values.

Consider:

egress-kube-api.yaml

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: egress-kube-api
  namespace: {{ .Release.Namespace }}
spec:
  podSelector: {}
  policyTypes:
  - Egress
  egress:
  - to:
    - ipBlock:
        cidr: {{ .Values.networkPolicies.controlPlaneCidr }}

... the assumption is that the bigbang 3rd party package chart will appropriately pass through the networkPolicies.controlPlaneCidr, which was set at the top level parent (bigbang/chart/values.yaml). However this isn't the behavior of the 3rd party package chart. The global values are not merged into (or beneath) the values for the 3rd party package.

bigbang/chart/templates/package/values.yaml

{{- $pkg = include "resourceName" $pkg -}}
{{- $defaults := $.Files.Get (printf "defaults/%s.yaml" $pkg) -}}
{{- if $defaults -}}
{{- $vals := mergeOverwrite $vals ($defaults | fromYaml).package -}}
{{- end -}}
apiVersion: v1
kind: Secret
metadata:
  name: {{ $pkg }}-values
  namespace: {{ dig "namespace" "name" $pkg $vals }}
  labels:
    {{- include "commonLabels" $ | nindent 4 }}
type: Opaque
stringData:
  {{ if and (dig "enabled" true $vals) (not $vals.kustomize) -}}
  values.yaml: |
  {{- tpl (toYaml $vals.values) $ | nindent 4 }}
  {{ else }}
  {{- tpl (toYaml $vals.values) $ | nindent 2 }}
  {{ end }}

Deploying these charts in this state results in helm installation failures:

1s          Warning   InstallFailed      HelmRelease/jira   Helm install failed for release jira/jira with chart jira@1.18.1-bb.0+3ab13cc1dbc2: 1 error occurred:
            * NetworkPolicy.extensions "egress-kube-api" is invalid: spec.egress[0].to[0].ipBlock.cidr: Required value

Maybe this is working as designed, but it is confusing to me to have the global spaces inherited/extended by all the other bigbang charts but not these packages.

BigBang Version

bigbang-2.22.0