Preventing rust-analyzer from Spawning New Instances for Local Dependencies(hope useful for others)

[eihqnh]

Checked other resources

• This is not a bug report or feature request (Please use issues for those).
• This is a question about rustaceanvim, not rust-analyzer or Neovim.
• This is not a question about autocompletion.
• I have read the README.
• I have read the FAQ.
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Description

My project structure is:

deps/
  ├─ Cargo.toml (declares a workspace including dep-core, dep1, dep2, dep3)
  ├─ dep-core/
  │    └─ Cargo.toml
  ├─ dep1/
  │    └─ Cargo.toml
  ├─ dep2/
  │    └─ Cargo.toml
  └─ dep3/
       └─ Cargo.toml
Cargo.lock
Cargo.toml
src/

[package]
name = "repro"
version = "0.1.0"
edition = "2021"

[dependencies]
dep-core = { path = "deps/dep-core" }

The root Cargo.toml depends on deps/dep-core/.
The deps directory itself is a workspace containing multiple sub-crates (dep-core, dep1, dep2, dep3).

When I navigate from src/main.rs to code inside the deps directory, Rust Analyzer starts a new instance instead of reusing the existing one.
(However, when I jump to code inside ~/.cargo/registry, Rust Analyzer reuses the existing instance.)

Example Code

{}

Neovim version (nvim -v)

v0.10.1

Operating system/version

nixos 24.05

Output of :checkhealth rustaceanvim

none

[eihqnh]

add .nvim.lua at project root

vim.g.rustaceanvim = {
  server = {
    root_dir = vim.fn.getcwd()
  },
}

edited:

according to mrcjkb said
vim.lsp.config("rust-analyzer", { root_dir = vim.fn.getcwd() }) and :h vim.lsp.Config

• {reuse_client}?  (`fun(client: vim.lsp.Client, config: vim.lsp.ClientConfig): boolean`)
                         Predicate which decides if a client should be
                         re-used. Used on all running clients. The default
                         implementation re-uses a client if name and root_dir
                         matches.

vim.lsp.config("rust-analyzer", { root_dir = vim.fn.getcwd(), reuse_client = true })

[mrcjkb]

Thanks for posting 🙏

I'd suggest to use

• vim.lsp.config("*", { root_dir = vim.fn.getcwd() }) for all LSP clients
• or vim.lsp.config("rust-analyzer", { root_dir = vim.fn.getcwd() }) for the rustaceanvim client only.

If you set vim.g.rustaceanvim like that in a project-local exrc file, it will overwrite any existing vim.g.rustaceanvim config.

[eihqnh]

thank you very much.I learned a lot