Massive problem trying to replace strings within a configmap yaml file

[cheuk209]

Hello I have created a bunch of Alert rules (for Grafana) in the form of a configmap:

kind: ConfigMap
apiVersion: v1
metadata:
  name: thanos-ruler-custom-rules
  namespace: open-cluster-management-observability
  annotations:
    argocd.argoproj.io/sync-wave: "2"
data:
  custom_rules.yaml: |
    groups:
      - name: app-XXXXX
        rules:
        - alert: XXXRefreshXX
          annotations:
            description: "TEST TESTXXXXX {{ $labels.zoneId }} {{ $labels.cluster }}"
            summary: "EPC Refresh rate above 7s for more than 1 minute."
            runbook_url: bitbucket-xxx.com/projects/XXX/rXXXXXX/k8s/argocd/overlay/env/XXXXrunbook.md
            dashboard_url: "grafana-xxx.com/d/bey8yi92day2oe/XXXXX=1&from=now-1h&to=now&timezone=XXX%2FLondon&var-cluster=$__all&var-envname=XXXXr&var-App=$__all&var-Filters=&var-XXX=$__all&refresh=1m&actionView=breakdown&var-groupby=app_type&metricPrefix=all&viewPanel=panel-886"
          expr: max by (zoneId, cluster)(zone_cache_update_times_seconds_max) > 5
          for: 1m
          labels:
            severity: critical
            ServiceType: "App XXX"

This DOES WORK. My problem is I need to promote this configmap into many different environments.

So currently the runbook and dashboard URLs are both hardcoded. Is there a way to use Kustomize to painlessly substitute these URLs?

I have experimented with patchstrategicmerge locally, but it is a pain. It seems there is no "elegant" way to replace them strings. I have tried using replacement and it does not work well at all, and I fell down a rabbit hole experimenting with delimiters and replacements.

No good. PLease halp!