renovate.json

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "config:recommended"
  ],
  "automerge": true,
  "automergeType": "pr",
  "customManagers": [
    {
      "customType": "regex",
      "description": "Update VERSION variables in Dockerfiles",
      "managerFilePatterns": [
        "/^Dockerfile$/"
      ],
      "matchStrings": [
        "# renovate: datasource=(?<datasource>[a-z-]+?) depName=(?<depName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) .+?_VERSION=\"(?<currentValue>.+?)\"\\s",
        "# renovate: datasource=(?<datasource>[a-z-]+?) depName=(?<depName>.+?)(?: versioning=(?<versioning>[a-z-]+?))?\\s(?:ENV|ARG) VERSION=\"(?<currentValue>.+?)\"\\s"
      ],
      "versioningTemplate": "{{#if versioning}}{{versioning}}{{else}}semver{{/if}}"
    }
  ]
}