Support relative paths for config presets

[remal]

What would you like Renovate to be able to do?

We have several repositories that have the same files automatically synchronized between them. Renovate's config is one of them.

It would be cool if we could use relative paths in shared config presets. It would allow us to use synchronized base Renovate config and included repository specific preset.

If you have any ideas on how this should be implemented, please tell us here.

If extends section has a value starting with ./ or ../, it should be treated as a relative path and loaded accordingly.

Is this a feature you are interested in implementing yourself?

Maybe

[rarkins]

What would the syntax look like?

[remal]

@rarkins If extends section has a value starting with ./ or ../, it should be treated as a relative path to the current config file.

However, I'm not sure how nested extends works (when an included file includes another file), there can be some difficulties here.

[viceice]

the main difficulty is that preset does know anything about paths at all, that info is only available on platform code, bit that doesn't know anything about parent preset.

[remal]

We can live without this feature (with some hacks), but we'd appreciate it if Renovate teams implemented it. However, I understand that it may take a lot of time to implement, and not many users need this feature, so it's not a high priority.

[github-actions]

Hi there,

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