Add per-workload replicas values and a chart-global scaleDown flag

Every Deployment/StatefulSet now takes its replica count from a replicas
value (default 1, explicit 0 allowed) via a new per-chart <chart>.replicas
helper; the helper uses a kindIs "invalid" nil check so an explicit 0 is
not swallowed by Helm's default function. A chart-global scaleDown flag
(default false) takes precedence: it renders every workload with
replicas: 0 and suspends the paperless-ngx consume CronJob, stopping the
app without uninstalling it (PVCs, Secrets, Services and Ingress remain).

Defaults leave the rendered manifests byte-identical to main, so all
published charts get a minor version bump; the template-chart carries the
reference helper implementation and stays unversioned.

Fixes #25

satisfactory/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: satisfactory
 description: A Helm chart to deploy a Satisfactory Gameserver on Kubernetes
 type: application
-version: 3.0.0+upv1.9.10
+version: 3.1.0+upv1.9.10
 appVersion: "v1.9.10"
 maintainers:
   - name: jklein

satisfactory/templates/_helpers.tpl

@@ -83,3 +83,34 @@ results are printed without a decimal point.
 {{- printf "%v%s" $product $suffix -}}
 {{- end -}}
 {{- end -}}
+
+{{/*
+Render the replica count for a Deployment/StatefulSet.
+
+Input: dict
+  "scaleDown"  the chart-global .Values.scaleDown flag (may be nil)
+  "replicas"   the workload's replicas value (may be nil)
+
+Rules (issue #25):
+  - scaleDown: true takes precedence and always yields 0.
+  - otherwise an explicitly set replicas value is used as given, including an
+    explicit 0 — Helm's "default" would swallow 0, hence the explicit
+    kindIs "invalid" nil check.
+  - a missing replicas value defaults to 1.
+
+Usage (the values path to the workload's replicas varies per chart):
+  replicas: {{ include "satisfactory.replicas" (dict "scaleDown" .Values.scaleDown "replicas" .Values.<app>.replicas) }}
+
+NOTE: like the resources helper above, this is duplicated into every chart's
+templates/_helpers.tpl with the chart's name as define prefix. This file in
+template-chart is the reference implementation.
+*/}}
+{{- define "satisfactory.replicas" -}}
+{{- if .scaleDown -}}
+0
+{{- else if not (kindIs "invalid" .replicas) -}}
+{{- .replicas -}}
+{{- else -}}
+1
+{{- end -}}
+{{- end -}}

satisfactory/templates/satisfactory-server.sfs.yaml

@@ -7,7 +7,7 @@ spec:
     matchLabels:
       app: "{{ .Release.Name }}-{{ .Chart.Name }}-sf-server"
   serviceName: "{{ .Release.Name }}-{{ .Chart.Name }}-sf-service"
-  replicas: 1
+  replicas: {{ include "satisfactory.replicas" (dict "scaleDown" .Values.scaleDown "replicas" .Values.server.replicas) }}
   template:
     metadata:
       labels:

satisfactory/values.yaml

@@ -1,3 +1,9 @@
+# Scale the whole chart down without uninstalling it: scaleDown: true renders
+# every Deployment/StatefulSet with replicas: 0 (and suspends CronJobs) and
+# takes precedence over any per-workload replicas value. PVCs, Secrets and
+# Services stay in place; scaleDown: false brings the workloads back up.
+scaleDown: false
+
 dev:
   debug: false
 
@@ -7,6 +13,9 @@ game:
   seasonalEvents: true
 
 server:
+  # Replica count for this workload; 0 is allowed and scales it down.
+  # The chart-global scaleDown flag takes precedence.
+  replicas: 1
   gamePort: 30777
   messagingPort: 30888
   storage: 20Gi
@@ -20,4 +29,4 @@ server:
     requests:
       memory: "4Gi"
       cpu: "1"
-      ephemeral-storage: "5Gi"
+      ephemeral-storage: "5Gi"