add Renovate annotation for Keycloak

.woodpecker/keycloak.yaml

@@ -19,6 +19,7 @@ workspace:
 # Also because global environment variables aren't a thing.
 matrix:
   KEYCLOAK_VERSION:
+    # renovate: datasource=docker depName=quay.io/keycloak/keycloak
     - 26.5.7
   IMAGE_NAME:
   - git.hamburg.ccc.de/ccchh/oci-images/keycloak

renovate.json

@@ -2,5 +2,19 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
+  ],
+  "packageRules": {
+    "customManagers": [
+      // Custom manager using regex for letting Renovate find dependencies in woodpecker Matrix variables.
+      {
+        "customType": "regex",
+        "managerFilePatterns": [
+          "/^\\.woodpecker/.*\\.ya?ml$/"
+        ],
+        "matchStrings": [
+          "# renovate: datasource=(?<datasource>[a-zA-Z0-9-._]+?) depName=(?<depName>[^\\s]+?)(?: packageName=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?\\s*-\\s*[\"']?(?<currentValue>.+?)[\"']?\\s"
         ]
       }
+    ]
+  }
+}