Are you going to use racer or RLS?

No, we plan to implement most of the language analysis from scratch. This is a lot of work, but the benefits are substantial. We would be able to leverage IntelliJ Platform infrastructure for incremental analysis and indexing. With our own analysis we can provide more flexible quick fixes, intentions and typing assistance.

The same applies to the formatter (that is also from scratch, but we plan to support running rustfmt as an action). It is necessary for proper working of almost any feature which is modifying source code.

不用cargo装rls，编译大半天，而且还是预览版，很多坑还没填。