Show user if config migration is needed for their own config or for an extends

[HonkingGoose]

What would you like Renovate to be able to do?

Rescuing a good idea from getting lost in the discussion. 😄 Source:

• "Config needs migrating" but shows no steps needing migration? #19960

Right now, Renovate shows a log message when there's an extends that needs migrating:

 WARN: Config needs migrating
       "originalConfig": {
         "username": "...",
         "gitAuthor": "...",
         "requireConfig": "optional",
         "onboarding": false,
         "platform": "github",
         "includeForks": true,
         "extends": ["github>org/presets"],
         "hostRules": [{"hostType": "docker"}]
       },
       "migratedConfig": {
         "username": "...",
         "gitAuthor": "...",
         "requireConfig": "optional",
         "onboarding": false,
         "platform": "github",
         "includeForks": true,
         "extends": ["github>org/presets"],
         "hostRules": [{"hostType": "docker"}]
       }

It's not immediately clear to the user that the extends part is causing the problem:

I've worked it out that it's that inside the extends there's a includeForks: true that needs migrating.

Would be good if we can try and highlight that it may be an extends that's at fault in this case, as it could be confusing - maybe in the case that originalConfig == migratedConfig?

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

@rarkins said:

I think we should differentiate between "YOUR config needs migrating" (which is actionable) versus "An extends you depend on needs migrating" (which may not be actionable)

Is this a feature you are interested in implementing yourself?

No