nuget.config packageSourceCredentials support

[rarkins]

Discussed in #30498

^{Originally posted by theKBro July 31, 2024}

What would you like help with?

I would like help with my configuration

How are you running Renovate?

Self-hosted

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

GitLab with ghcr.io/renovatebot/renovate:37.440.7

Please tell us more about your question or problem

I would like to use renovate to update packages from private nuget repositories.
The nuget.config file contains all information needed to access the private packageSources

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <add key="myPrivateRepo" value="https://gitlab.myCompany.com/api/v4/groups/94/-/packages/nuget/index.json" />
  </packageSources>
  <packageSourceCredentials>
    <myPrivateRepo>
      <add key="Username" value="shared_read" />
      <add key="ClearTextPassword" value="passwordInClearText" />
    </myPrivateRepo>
  </packageSourceCredentials>
</configuration>

but renovate does not seem to use the packageSourceCredentials at all.
We have many different repositories with different read access tokens. Is there any way that this is working or do I need to add hostRules to my runner configuration for all possible autodetected repositories?

Logs (if relevant)

Logs

DEBUG: Found NuGet.config at nuget.config (repository=myRepo)
DEBUG: Adding registry URL https://gitlab.myCompany.com/api/v4/groups/94/-/packages/nuget/index.json (repository=myRepo)
       "registryUrl": "https://gitlab.myCompany.com/api/v4/groups/94/-/packages/nuget/index.json",
       "sourceMappedPackagePatterns": undefined

DEBUG: GET https://gitlab.myCompany.com/api/v4/groups/94/-/packages/nuget/metadata/otherProject/index.json = (code=ERR_NON_2XX_3XX_RESPONSE, statusCode=401 retryCount=0, duration=33) (repository=myRepo)
DEBUG: Datasource unauthorized (repository=myRepo)
       "datasource": "nuget",
       "packageName": "otherProject",
       "url": "https://gitlab.myCompany.com/api/v4/groups/94/-/packages/nuget/metadata/otherProject/index.json"