Refactor all values in environments to come from an external file, and

then add support for HELMFILE_ENVIRONMENT.

+clusterIssuer:
+  jsonPatches: []
+  strategicMergePatches: []
+  caIssuer:
+    secretName: root-ca
+  letsencrypt:
+    enabled: true
+    email: name@example.com
+    tls_key: replace-me
+root-ca:
+  crt: null
+  key: null
+version:
+  raw: 1.1.0

-environments:
-  default:
-    values:
-      - clusterIssuer:
-          jsonPatches: []
-          strategicMergePatches: []
-          caIssuer:
-            secretName: root-ca
-          letsencrypt:
-            enabled: true
-            email: name@example.com
-            tls_key: replace-me
-        root-ca:
-          crt: null
-          key: null
-        version:
-          raw: 1.1.0
+bases:
+  - ../common/environments.yaml
 
 repositories:
   - name: jetstack

+environments:
+  {{ .Environment.Name }}:
+    missingFileHandler: Debug
+    values:
+      - environments/default-values.yaml
+      {{- if ne .Environment.Name "default" }}
+      - environments/{{ .Environment.Name }}-values.yaml
+      {{- end }}
+

+namespace: istio-system
+namePrefix: ""
+version:
+  istio: 1.14.1
+  raw: 1.1.0
+gateways:
+  - name: cluster-local-gateway
+    hosts:
+      - "*"

-environments:
-  default:
-    values:
-      - namespace: istio-system
-        namePrefix: ""
-        version:
-          istio: 1.14.1
-          raw: 1.1.0
-        gateways:
-          - name: cluster-local-gateway
-            hosts:
-              - "*"
+bases:
+  - ../common/environments.yaml
 
 repositories:
   - name: istio

+namespace: keycloak-operator
+

-environments:
-  default:
-    values:
-      - namespace: keycloak-operator
+bases:
+  - ../common/environments.yaml
+
 ---
 
 repositories:

+namespace: kube-system
+storageClass:
+  default: true
+  name: local-path
+
+nodePaths:
+  - node: DEFAULT_PATH_FOR_NON_LISTED_NODES
+    paths:
+      - /opt/local-path-provisioner
+

-environments:
-  default:
-    values:
-      - namespace: kube-system
-        storageClass:
-          default: true
-          name: local-path
-
-        nodePaths:
-          - node: DEFAULT_PATH_FOR_NON_LISTED_NODES
-            paths:
-              - /opt/local-path-provisioner
+bases:
+  - ../common/environments.yaml
 ---
 
 repositories:

+namespace: postgres-operator
+

-environments:
-  default:
-    values:
-      - namespace: postgres-operator
+bases:
+  - ../common/environments.yaml
 
 repositories:
   - name: postgres-operator-charts
     url: https://opensource.zalando.com/postgres-operator/charts/postgres-operator
 
+---
+
 releases:
   - name: postgres-operator
     namespace: {{ .Values.namespace }}