publish diagnostics when auto-build is disabled

[CsCherrYY]

Signed-off-by: Shi Chen chenshi@microsoft.com

This PR is a follow-up for #2437. When auto-build is disabled and some configurations changed, which need re-validate and publish diagnostics (e.g., null analysis configuration changed), we can do the publish job for open editors (via BaseDocumentLifeCycleHandler.publishDiagnostics) without triggering a rebuild.

null.mp4

[rgrunber]

This works for me. Are there other instances aside from null analysis where we could re-publish diagnostics when the autobuild is off ?

[CsCherrYY]

Are there other instances aside from null analysis where we could re-publish diagnostics when the autobuild is off ?

@testforstephen and me are investigating the features that could be affected if we disable the auto build. Aside from this, now we found

• manually rename a symbol without any tips from references (when auto build is on, user can see errors from references)
• hot code replace when debugging

The following PRs and issues will be created these days.