Dynamic defaultOnboardingPreset location

[jvmdc]

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We're currently in the process of migrating from a platform (BitBucket) that has nesting to a platform that does not (GitHub).

In our previous setup, each area would be grouped under a project in BitBucket and would thus be able to create a renovate-config repository that would be auto-detected as part of onboarding. In GitHub, it would only be possible to have one repository in the entire organization that does this.

Our repositories follow a naming convention of separating components of the name by dots, sort of emulating a nested hierarchy, e.g. the following could all be repositories:

MyArea.MySystem.MyService
MyArea.MySystem.MyPackage
MyArea.MyPackage
MyArea2.MyPackage

etc.

I would love to be able to override the locations that Renovate look for the default onboarding preset dynamically. I am thinking being able to pass in a function(repositoryName: string) => string that we could then do whatever inside to make it look in the correct location for us, e.g. when onboarding MyArea.MyPackage, it would look in MyArea.RenovateConfig or similar.

Alternatively, it would be nice to override it with a static string. I initially thought it was using the setting inheritConfigRepoName for this purpose, but I see the code (https://github.com/renovatebot/renovate/blob/38.58.0/lib/workers/repository/onboarding/branch/config.ts) does not refer that. If the string was static, I could group repositories in my script that spawns Renovate by each logical grouping and tweak that setting for each group.