language/just: init

Create the module `vim.languages.just` which provides support for
treesitting and just-lsp.

modules/plugins/languages/just.nix

@@ -0,0 +1,64 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (builtins) attrNames;
+  inherit (lib.options) mkEnableOption mkOption;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.meta) getExe;
+  inherit (lib.types) enum listOf;
+  inherit (lib.nvim.attrsets) mapListToAttrs;
+  inherit (lib.nvim.types) mkGrammarOption;
+
+  cfg = config.vim.languages.just;
+
+  defaultServers = ["just-lsp"];
+  servers = {
+    just-lsp = {
+      enable = true;
+      cmd = [(getExe pkgs.just-lsp)];
+      filetypes = ["just"];
+      root_markers = [".git" "justfile"];
+    };
+  };
+in {
+  options.vim.languages.just = {
+    enable = mkEnableOption "Just support";
+
+    treesitter = {
+      enable =
+        mkEnableOption "Just treesitter" // {default = config.vim.languages.enableTreesitter;};
+      package = mkGrammarOption pkgs "just";
+    };
+
+    lsp = {
+      enable =
+        mkEnableOption "Just LSP support" // {default = config.vim.lsp.enable;};
+      servers = mkOption {
+        type = listOf (enum (attrNames servers));
+        default = defaultServers;
+        description = "Just LSP server to use";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter = {
+        enable = true;
+        grammars = [cfg.treesitter.package];
+      };
+    })
+
+    (mkIf cfg.lsp.enable {
+      vim.lsp.servers =
+        mapListToAttrs (n: {
+          name = n;
+          value = servers.${n};
+        })
+        cfg.lsp.servers;
+    })
+  ]);
+}