ci: add workflow to auto-update charts

.github/workflows/chart-update.yaml

@@ -0,0 +1,46 @@
+---
+name: "chart-update"
+
+on:
+  schedule:
+  - cron: "0 7 * * 1-5"
+
+  workflow_dispatch:
+    inputs:
+      update-strategy:
+        description: "Update strategy to use. Valid values are 'patch', 'minor' or 'major'"
+        type: choice
+        options:
+        - "patch"
+        - "minor"
+        - "major"
+        required: true
+      excluded-dependencies:
+        description: "Comma-separated list of dependencies to exclude from the update (i.e. 'dependency1,dependency2,dependency3')"
+        type: string
+        required: false
+        default: ""
+      dry-run:
+        description: "Activate dry-run mode"
+        type: boolean
+        required: false
+        default: true
+
+jobs:
+
+  chart-update-schedule:
+    if: ${{ github.event_name == 'schedule' }}
+    strategy:
+      matrix:
+        update-strategy: ["major", "minor"]
+    uses: camptocamp/devops-stack/.github/workflows/modules-chart-update.yaml@main
+    with:
+      update-strategy: ${{ matrix.update-strategy }}
+
+  chart-update-manual:
+    if: ${{ github.event_name == 'workflow_dispatch' }}
+    uses: camptocamp/devops-stack/.github/workflows/modules-chart-update.yaml@main
+    with:
+      update-strategy: ${{ inputs.update-strategy }}
+      excluded-dependencies: ${{ inputs.excluded-dependencies }}
+      dry-run: ${{ inputs.dry-run }}

README.adoc

@@ -1,6 +1,7 @@
 = devops-stack-module-thanos
 // Document attributes to replace along the document
-:chart-version: 12.6.3
+:thanos-chart-version: 12.6.3
+:original-repo-url: https://github.com/bitnami/charts/tree/master/bitnami/thanos
 
 A https://devops-stack.io[DevOps Stack] module to deploy and configure https://thanos.io[Thanos].
 
@@ -9,7 +10,7 @@ The Thanos chart used by this module is shipped in this repository as well, in o
 [cols="1,1,1",options="autowidth,header"]
 |===
 |Current Chart Version |Original Repository |Default Values
-|*{chart-version}* |https://github.com/bitnami/charts/tree/master/bitnami/thanos[Chart] |https://artifacthub.io/packages/helm/bitnami/thanos/{chart-version}?modal=values[`values.yaml`]
+|*{chart-version}* |{original-repo-url}[Chart] |https://artifacthub.io/packages/helm/bitnami/thanos/{chart-version}?modal=values[`values.yaml`]
 |===
 
 *Since this module is meant to be instantiated using its variants, the usage documentation is available in each variant* ( xref:./aks/README.adoc[AKS] | xref:./eks/README.adoc[EKS] | xref:./kind/README.adoc[KinD] ).

charts/thanos/Chart.yaml

@@ -4,5 +4,5 @@ name: "thanos"
 version: "0"
 dependencies:
   - name: "thanos"
-    version: "^12"
+    version: "12.6.3"
     repository: "https://charts.bitnami.com/bitnami"