Bundler extract should not set registryUrls for git-refs datasource

[rarkins]

The bundler manager should not set registryUrls when datasource=git-refs.

Discussed in #36873

^{Originally posted by manicmaniac July 7, 2025}

How are you running Renovate?

A Mend.io-hosted app

If you're self-hosting Renovate, tell us which platform (GitHub, GitLab, etc) and which version of Renovate.

41.23.4

Please tell us more about your question or problem

Overview

Renovate emits the warning 'Custom registries are not allowed for this datasource and will be ignored' for Gemfiles that reference Git packages.

Details

This problem occurs both on the Mend.io-hosted app and with self-hosted Renovate.

The following repository is a minimal reproduction of the issue:
https://github.com/manicmaniac/renovate-bundler-warnings

My Gemfile and renovate.json look like the following:

# frozen_string_literal: true

source "https://rubygems.org"

gem 'danger', git: 'https://github.com/danger/danger.git', tag: '9.5.3'

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
    "config:recommended"
  ],
  "npm": {
    "enabled": false
  }
}

In this environment, Renovate issues the following warning: 'Custom registries are not allowed for this datasource and will be ignored.'

$ npm install
$ GITHUB_COM_TOKEN="$(gh auth token)" LOG_LEVEL=info npx renovate --platform=local
 INFO: Repository started (repository=local)
       "renovateVersion": "41.23.4"
 INFO: Dependency extraction complete (repository=local)
       "stats": {
         "managers": {"bundler": {"fileCount": 1, "depCount": 1}},
         "total": {"fileCount": 1, "depCount": 1}
       }
 WARN: Custom registries are not allowed for this datasource and will be ignored (repository=local)
       "datasource": "git-refs",
       "registryUrls": ["https://rubygems.org"],
       "defaultRegistryUrls": null,
       "additionalRegistryUrls": undefined
 INFO: Repository finished (repository=local)
       "cloned": undefined,
       "durationMs": 630
 INFO: Renovate was run at log level "info". Set LOG_LEVEL=debug in environment variables to see extended debug logs.

This warning appears harmless, but it can be a bit distracting since it shows up on the Mend Renovate Dashboard like this.

⚠️ Repository problems
These problems occurred while renovating this repository.

Custom registries are not allowed for this datasource and will be ignored

Logs (if relevant)

Logs

 INFO: Repository started (repository=local)
       "renovateVersion": "41.23.4"
 INFO: Dependency extraction complete (repository=local)
       "stats": {
         "managers": {"bundler": {"fileCount": 1, "depCount": 1}},
         "total": {"fileCount": 1, "depCount": 1}
       }
 WARN: Custom registries are not allowed for this datasource and will be ignored (repository=local)
       "datasource": "git-refs",
       "registryUrls": ["https://rubygems.org"],
       "defaultRegistryUrls": null,
       "additionalRegistryUrls": undefined
 INFO: Repository finished (repository=local)
       "cloned": undefined,
       "durationMs": 630
 INFO: Renovate was run at log level "info". Set LOG_LEVEL=debug in environment variables to see extended debug logs.