renovate.json

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "labels": ["dependencies"],
  "enabledManagers": ["regex"],
  "customManagers": [
    {
      "customType": "regex",
      "description" : "Update tool versions in the Makefile",
      "fileMatch": [
        "(^|/)Makefile$"
      ],
      "matchStrings": [
        "# renovate: datasource=(?<datasource>[a-z-.]+?) depName=(?<depName>[^\\s]+?)(?: (?:packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: extractVersion=(?<extractVersion>[^\\s]+?))?(?: registryUrl=(?<registryUrl>[^\\s]+?))?\\s+[A-Za-z0-9_]+?_VERSION\\s*:*\\??=\\s*[\"']?(?<currentValue>.+?)[\"']?\\s"
      ]
    }
  ],
  "packageRules": [
    {
      "matchManagers": ["regex"],
      "matchFileNames": ["Makefile"],
      "commitMessageTopic": "tool {{depName}}"
    }
  ]
}