dotfiles/home/private_dot_config/nvim/lua/plugins/language/rust.lua

-- adapted from https://www.lazyvim.org/extras/lang/rust
return require("util").if_exe("rust", {
  {
    "hrsh7th/nvim-cmp",
    opts = function(_, opts)
      opts.sources = opts.sources or {}
      table.insert(opts.sources, { name = "crates" })
    end,
  },
  {
    "Saecki/crates.nvim",
    event = { "BufRead Cargo.toml" },
    opts = {
      completions = {
        cmp = { enabled = true },
      },
    },
  },
  {

    "nvim-treesitter/nvim-treesitter",
    opts = function(_, opts)
      opts.ensure_installed = opts.ensure_installed or {}
      vim.list_extend(opts.ensure_installed, { "ron", "rust", "toml" })
    end,
  },
  {
    "mrcjkb/rustaceanvim",
    version = "^4", -- Recommended
    ft = { "rust" },
    opts = {
      server = {
        on_attach = function(_, bufnr)
          vim.keymap.set("n", "<leader>cR", function()
            vim.cmd.RustLsp("codeAction")
          end, { desc = "Code Action", buffer = bufnr })
          vim.keymap.set("n", "<leader>dr", function()
            vim.cmd.RustLsp("debuggables")
          end, { desc = "Rust debuggables", buffer = bufnr })
        end,
        default_settings = {
          -- rust-analyzer language server configuration
          ["rust-analyzer"] = {
            cargo = {
              allFeatures = true,
              loadOutDirsFromCheck = true,
              runBuildScripts = true,
            },
            -- Add clippy lints for Rust.
            checkOnSave = {
              allFeatures = true,
              command = "clippy",
              extraArgs = { "--no-deps" },
            },
            procMacro = {
              enable = true,
              ignored = {
                ["async-trait"] = { "async_trait" },
                ["napi-derive"] = { "napi" },
                ["async-recursion"] = { "async_recursion" },
              },
            },
          },
        },
      },
    },
    config = function(_, opts)
      vim.g.rustaceanvim = vim.tbl_deep_extend("keep", vim.g.rustaceanvim or {}, opts or {})
    end,
  },
  {
    "neovim/nvim-lspconfig",
    opts = {
      servers = {
        rust_analyzer = {},
        taplo = {
          keys = {
            {
              "K",
              function()
                if vim.fn.expand("%:t") == "Cargo.toml" and require("crates").popup_available() then
                  require("crates").show_popup()
                else
                  vim.lsp.buf.hover()
                end
              end,
              desc = "Show Crate Documentation",
            },
          },
        },
      },
      setup = {
        rust_analyzer = function()
          return true
        end,
      },
    },
  },
})