Add renovate config

 - Changes tag if present
 - Tracks the same docker image version in appversion using regex

Incrementing the `Chart.yaml` version is tricker than expected,
postupgrade isn't available using the not-self-hosted app, and
the docker tags do not follow SemVer or we could just track that

.github/renovate.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base",
+    "config:recommended"
+  ],
+  "regexManagers": [
+    {
+      "datasourceTemplate": "docker",
+      "fileMatch": [
+        "(^|/)Chart\\.yaml$"
+      ],
+      "matchStrings": [
+        "#\\s*renovate: image=(?<depName>.*?)\\s+appVersion:\\s*[\"']?(?<currentValue>[\\w+\\.\\-]*)"
+      ]
+    }
+  ]
+}

.github/workflows/release-charts.yml

@@ -17,16 +17,18 @@ jobs:
           fetch-depth: 0
 
       - name: Configure Git
-        env:
-          GITHUB_TOKEN: "${{ secrets.ELEMENT_BOT_TOKEN }}"
         run: |
           git config user.name "$GITHUB_ACTOR"
           git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
 
       - name: Install Helm
         uses: azure/setup-helm@v3
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
 
       - name: Run chart-releaser
         uses: helm/chart-releaser-action@v1.5.0
         env:
-          CR_TOKEN: "${{ secrets.ELEMENT_BOT_TOKEN }}"
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_SKIP_EXISTING: true
+

charts/element-call/Chart.yaml

@@ -6,8 +6,8 @@ type: application
 
 # This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
-version: 0.1.3
-
+version: "0.1.3"
 # This version number should be incremented each time you make changes
 # to the application.
+# renovate: image=ghcr.io/vector-im/element-call
 appVersion: "v0.3.13"

charts/element-call/values.yaml

@@ -8,7 +8,7 @@ image:
   repository: ghcr.io/vector-im/element-call
   pullPolicy: IfNotPresent
   # Overrides the image tag whose default is the chart appVersion.
-  tag: ""
+  tag: "v0.3.13"
 
 imagePullSecrets: []
 nameOverride: ""

charts/ghost/Chart.yaml

@@ -6,4 +6,5 @@ maintainers:
   - name: Element SRE Team
 
 version: "0.82.0"
+# renovate: image=ghost
 appVersion: "5.38.0-alpine"