Rust Extra

lang.rust adds Rust and TOML editor support. It assumes the Rust toolchain is managed outside Blak with rustup or your system package manager.

Enable it

-- ~/.config/blak/lua/blak/user.lua
return {
  extras = {
    enabled = {
      "lang.rust",
    },
  },
}

Or toggle it from Neovim:

:BlakExtras enable lang.rust

Run :BlakExtras sync after enabling because this extra adds a plugin.

What it adds

Surface	Contribution
Treesitter	rust, toml
Mason	codelldb
LSP	rust_analyzer, taplo
Formatting	rustfmt with LSP fallback for rust; taplo with LSP fallback for toml
Plugins	saecki/crates.nvim for Cargo.toml

The extra configures rust-analyzer with cargo.allFeatures = true and check.command = "clippy".

Configure rust-analyzer

Add non-conflicting rust-analyzer settings in user.lua:

return {
  extras = {
    enabled = { "lang.rust" },
  },
  lsp = {
    servers = {
      rust_analyzer = {
        settings = {
          ["rust-analyzer"] = {
            procMacro = { enable = true },
            diagnostics = {
              disabled = { "unresolved-proc-macro" },
            },
          },
        },
      },
    },
  },
}

Because extras apply after user.lua, the extra’s own defaults win if you set the same exact keys, such as check.command. If you need to change those defaults, make a small local extra or contribute a Blak option for that behavior.

Configure formatting

The default uses external formatters where available and falls back to LSP:

return {
  extras = {
    enabled = { "lang.rust" },
  },
  format = {
    formatters_by_ft = {
      rust = { "rustfmt", lsp_format = "fallback" },
      toml = { "taplo", lsp_format = "fallback" },
    },
  },
}

Tooling notes

Install Rust itself outside Blak:

rustup component add rust-analyzer rustfmt clippy

Blak installs codelldb through Mason because that tool is editor-facing and works well as a Mason-managed binary.

Install and verify

:BlakExtras sync
:BlakToolsInstall
:BlakTreesitterInstall
:BlakDoctor

Open a Rust file and check :LspInfo for rust_analyzer.