add custom manager for letting Renovate find deps in woodpecker matrix

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"
         ]
       }
+    ]
+  }
+}