detect appVersion in Chart.yaml

Signed-off-by: Michael Sprauer <[email protected]>

charts/docker-mailserver/templates/deployment.yaml

@@ -79,7 +79,7 @@ spec:
         - name: dockermailserver
           env:
 {{- include "dockermailserver.upstream-env-variables" . | nindent 10 }}
-          image: {{ .Values.image.name }}:{{ .Values.image.tag }}
+          image: {{ .Values.image.name }}:{{ default .Chart.AppVersion .Values.image.tag }}
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           resources:
 {{ toYaml .Values.resources | indent 12 }}

charts/docker-mailserver/values.yaml

@@ -1,9 +1,10 @@
 ---
 image:
-  # image.name is the name of the container image to use. Refer to https://hub.docker.com/r/mailserver/docker-mailserver
+  ## image.name is the name of the container image to use. Refer to https://hub.docker.com/r/mailserver/docker-mailserver
   name: "mailserver/docker-mailserver"
-  # image.tag is the tag of the container image to use. Refer to https://hub.docker.com/r/mailserver/docker-mailserver
-  tag: "11.0.0"
+  ## image.tag is the tag of the container image to use. Refer to https://hub.docker.com/r/mailserver/docker-mailserver
+  ## If image.tag is not defined it will default to `.Chart.appVersion`
+  # tag: "latest"
   pullPolicy: "IfNotPresent"
 
 initContainer:

renovate.json

@@ -2,5 +2,15 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:base"
+  ],
+  "regexManagers": [
+    {
+      "description": "Update docker-mailserver docker image references in appVersion",
+      "fileMatch": ["Chart\\.yaml$"],
+      "matchStrings": ["appVersion:\\s+['\"]?(?<currentValue>\\d+\\.\\d+\\.\\d+)['\"]?"],
+      "depNameTemplate": "mailserver/docker-mailserver",
+      "datasourceTemplate": "docker",
+      "versioningTemplate": "docker"
+    }
   ]
 }