nix-community.nixvim/plugins/lsp/language-servers/rust-analyzer.nix

{
  config,
  lib,
  pkgs,
  ...
}:
with lib; let
  cfg = config.plugins.lsp.servers.rust-analyzer;
in {
  options.plugins.lsp.servers.rust-analyzer = {
    # https://github.com/nix-community/nixvim/issues/674
    installCargo = mkOption {
      type = with types; nullOr bool;
      default = null;
      example = true;
      description = "Whether to install `cargo`.";
    };

    cargoPackage = mkOption {
      type = types.package;
      default = pkgs.cargo;
      description = "Which package to use for `cargo`.";
    };

    installRustc = mkOption {
      type = with types; nullOr bool;
      default = null;
      example = true;
      description = "Whether to install `rustc`.";
    };

    rustcPackage = mkOption {
      type = types.package;
      default = pkgs.rustc;
      description = "Which package to use for `rustc`.";
    };
  };
  config = mkIf cfg.enable {
    warnings =
      (
        optional
        (cfg.installCargo == null)
        ''
          `rust_analyzer` relies on `cargo`.
          - Set `plugins.lsp.servers.rust-analyzer.installCargo = true` to install it automatically
            with Nixvim.
            You can customize which package to install by changing
            `plugins.lsp.servers.rust-analyzer.cargoPackage`.
          - Set `plugins.lsp.servers.rust-analyzer.installCargo = false` to not have it install
            through Nixvim.
            By doing so, you will dismiss this warning.
        ''
      )
      ++ (
        optional
        (cfg.installRustc == null)
        ''
          `rust_analyzer` relies on `rustc`.
          - Set `plugins.lsp.servers.rust-analyzer.installRustc = true` to install it automatically
            with Nixvim.
            You can customize which package to install by changing
            `plugins.lsp.servers.rust-analyzer.rustcPackage`.
          - Set `plugins.lsp.servers.rust-analyzer.installRustc = false` to not have it install
            through Nixvim.
            By doing so, you will dismiss this warning.
        ''
      );

    extraPackages = with pkgs;
      (
        optional
        ((isBool cfg.installCargo) && cfg.installCargo)
        cfg.cargoPackage
      )
      ++ (
        optional
        ((isBool cfg.installRustc) && cfg.installRustc)
        cfg.rustcPackage
      );
  };
}