modules/languages: add nu

modules/plugins/languages/default.nix

@@ -25,6 +25,7 @@ in {
     ./ts.nix
     ./typst.nix
     ./zig.nix
+    ./nu.nix
   ];
 
   options.vim.languages = {

modules/plugins/languages/nu.nix

@@ -0,0 +1,137 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}: let
+  inherit (lib.options) mkEnableOption mkOption mkPackageOption;
+  inherit (lib.types) str either package listOf enum;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.nvim.lua) expToLua;
+  inherit (pkgs) fetchFromGitHub;
+  inherit (builtins) attrNames isList;
+
+  defaultServer = "nushell";
+  servers = {
+    nushell = {
+      package = pkgs.nushell;
+      lspConfig = ''
+        lspconfig.nushell.setup{
+          capabilities = capabilities,
+          on_attach = default_on_attach,
+          cmd = ${
+          if isList cfg.lsp.package
+          then expToLua cfg.lsp.package
+          else ''{"${cfg.lsp.package}/bin/nu", "--no-config-file", "--lsp"}''
+        }
+        }
+      '';
+    };
+  };
+
+  # FIX: uncomment formatting parts, once https://github.com/NixOS/nixpkgs/pull/341647 makes it into nixos-unstable
+  # defaultFormat = "nufmt";
+  # formats = {
+  #   nufmt = {
+  #     package = pkgs.nufmt.overrideAttrs {
+  #       src = fetchFromGitHub {
+  #         owner = "nushell";
+  #         repo = "nufmt";
+  #         rev = "63549df4406216cce7e744576b1ee8fcaba9a30a";
+  #         hash = "sha256-Y7LvsCuirhYPjuQSF0w7me8vYrV39i4OhVvyI3XskpE=";
+  #       };
+  #     };
+  #     nullConfig = ''
+  #       table.insert(
+  #         ls_sources,
+  #         {
+  #           name = "nufmt",
+  #           method = null_methods.internal.FORMATTING,
+  #           filetypes = { "nu" },
+  #           generator_opts = {
+  #             command = "${cfg.format.package}/bin/nufmt",
+  #             args = { "--stdin" },
+  #             to_stdin = true
+  #           },
+  #           factory = null_helpers.formatter_factory
+  #         }
+  #       )
+  #     '';
+  #   };
+  # };
+
+  cfg = config.vim.languages.nu;
+in {
+  options.vim.languages.nu = {
+    enable = mkEnableOption "Nu language support";
+
+    treesitter = {
+      enable = mkEnableOption "Nu treesitter" // {default = config.vim.languages.enableTreesitter;};
+      package = mkOption {
+        description = "The Nu treesitter package to use.";
+        type = package;
+        # FIX: this doesn't work, unofficial grammars probably need some extra lua code
+        default = pkgs.tree-sitter.buildGrammar {
+          language = "nu";
+          version = "0.0.0+rev=0bb9a60";
+          src = fetchFromGitHub {
+            owner = "nushell";
+            repo = "tree-sitter-nu";
+            rev = "0bb9a602d9bc94b66fab96ce51d46a5a227ab76c";
+            hash = "sha256-A5GiOpITOv3H0wytCv6t43buQ8IzxEXrk3gTlOrO0K0=";
+          };
+          meta.homepage = "https://github.com/nushell/tree-sitter-nu";
+        };
+        defaultText = "See code";
+      };
+    };
+
+    lsp = {
+      enable = mkEnableOption "Nu LSP support" // {default = config.vim.languages.enableLSP;};
+      server = mkOption {
+        description = "Nu LSP server to use";
+        type = str;
+        default = defaultServer;
+      };
+
+      package = mkOption {
+        description = "Nu LSP server package, or the command to run as a list of strings";
+        example = ''[(lib.getExe pkgs.nushell) "--lsp"]'';
+        type = either package (listOf str);
+        default = servers.${cfg.lsp.server}.package;
+      };
+    };
+
+    # format = {
+    #   enable = mkEnableOption "Nu formatting" // {default = config.vim.languages.enableFormat;};
+    #
+    #   type = mkOption {
+    #     description = "Nu formatter to use";
+    #     type = enum (attrNames formats);
+    #     default = defaultFormat;
+    #   };
+    #   package = mkOption {
+    #     description = "Nu formatter package";
+    #     type = package;
+    #     default = formats.${cfg.format.type}.package;
+    #   };
+    # };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter.enable = true;
+      vim.treesitter.grammars = [cfg.treesitter.package];
+    })
+
+    (mkIf cfg.lsp.enable {
+      vim.lsp.lspconfig.enable = true;
+      vim.lsp.lspconfig.sources.nu-lsp = servers.${cfg.lsp.server}.lspConfig;
+    })
+
+    # (mkIf cfg.format.enable {
+    #   vim.lsp.null-ls.enable = true;
+    #   vim.lsp.null-ls.sources.nu-format = formats.${cfg.format.type}.nullConfig;
+    # })
+  ]);
+}