Compile / edit time pluggable analyzers like C#

It would be nice to have similar plugabble compile time / editing time analyzer plugins as introduced in C# in Build 2015, see the video.

Analyzer is a library that can do additional syntax checks, tag lines as errors / warnings, and are interpreted by language service.

I can imagine one could do similar things with it as Facebook's flow does e.g. own nullable checking just by writing own analyzer. This would be configurable from tsconfig, maybe one could whitelist the files each analyzer works on. This way the nullability check analyzer would only complain about the code I want.

この issue には、最初に取りかかるファイル、テスト、エントリーポイントが記載されていません。まずコンパイラと language-service の拡張ポイントを見つけ、実装の前に analyzer API、設定の動作、診断の統合を定義してください。