Standalone File Support - simrat39/rust-tools.nvim GitHub Wiki

rust-tools supports rust analyzer for standalone files (not in a cargo project). The language server is automatically started when you start a rust file which is not in a cargo file (nvim abc.rs). If you want to attach some other buffer to the standalone client (after opening nvim and switching to a new rust file), then use the RustStartStandaloneServerForBuffer command.