[Fleet] TS project references migration

[jfsiii]

Summary

Now that the Kibana build system supports using TypeScript project references (#46773), the fleet plugin must be migrated to participate. This is part of the overall effort tracked at #80508.

Acceptance criteria

See PR at #87574
The fleet plugin can be referred to using a project reference, which means it...

• has a tsconfig.json file which conforms to the documented form
• references the dependencies
  • infra [Logs + Metrics UI] Migrate to TS project references #80995
  • licensing
  • data
  • encryptedSavedObjects
  • security
  • features
  • cloud
  • usageCollection
  • home
  • kibanaReact
  • kibanaUtils
  • esUiShared
• emits type definitions for its public API
• compiles in tsc's build mode

Related information

• https://github.com/elastic/kibana/blob/master/docs/developer/best-practices/typescript.asciidoc#project-references
• https://www.typescriptlang.org/docs/handbook/project-references.html

[elasticmachine]

Pinging @elastic/ingest-management (Team:Ingest Management)

[jfsiii]

Tagged as 7.11 & 7.12 see #80508 (comment) & #80508 (comment)

[ph]

Thanks @jfsiii for creating this, one question do you know the background in why in the meta issue (#80508) it's marked that the kibana platform will do it? Is is because of the dependencies? Could you take the lead on that effort for 7.12, looking at the weekly kibana update there is a hard deadline for 7.12 on this change.

[ph]

Also, what is the effort for us to migrate to TS project? Are we talking hours, days, or more?

[jfsiii]

@ph I missed that update, but it looks like @restrry updated it back in November.

Regarding scope, I'm not sure. I believe the work is dominated/dependent on the plugins listed in the description (data, security, features, etc) but let me look more into the Fleet code and ask around and I'll come back with an update.

@restrry, are you / platform working on this? Do you need anything from me / Fleet? I'm happy to help any way I can. I'll also probably drop in the Slack channel soon to ask some questions.

[ph]

Thanks @jfsiii for coordinating that effort.

[mshustov]

@jfsiii your help is appreciated if you have the capacity for it.
I assigned it to the Core team since I wasn't sure whether the plugin is maintained by anyone.