renovate/docs/usage/modules/datasource.md

Datasources

Once Renovate's manager is done scanning files and extracting dependencies, it will assign a datasource to each extracted package file and/or dependency so that Renovate then knows how to search for new versions. You do not need to ever configure/override datasources directly, but you may use them in a packageRules array to configure other aspects of Renovate's behavior, e.g.

{
  "packageRules": [
    {
      "datasources": ["npm"],
      "packageNames": ["lodash"],
      "automerge": true
    }
  ]
}

Supported Datasources