Merge pull request #139 from horriblename/feat-lsp-lua

docs/release-notes/rl-0.5.adoc

@@ -16,6 +16,8 @@ https://github.com/horriblename[horriblename]:
 
 * Allow using command names in place of LSP packages to avoid automatic installation.
 
+* Add lua LSP and treesitter support, and neodev.nvim plugin support.
+
 https://github.com/amanse[amanse]:
 
 * Added daily notes options for obsidian plugin.

flake.nix

@@ -133,6 +133,11 @@
       flake = false;
     };
 
+    neodev-nvim = {
+      url = "github:folke/neodev.nvim";
+      flake = false;
+    };
+
     elixir-ls = {
       url = "github:elixir-lsp/elixir-ls";
       flake = false;

lib/types/plugins.nix

@@ -80,6 +80,7 @@ with lib; let
     "vim-repeat"
     "smartcolumn"
     "project-nvim"
+    "neodev-nvim"
     "elixir-ls"
     "elixir-tools"
     "nvim-colorizer-lua"

modules/languages/default.nix

@@ -24,6 +24,7 @@ in {
     ./html.nix
     ./svelte.nix
     ./java.nix
+    ./lua.nix
   ];
 
   options.vim.languages = {

modules/languages/lua.nix

@@ -0,0 +1,59 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+with lib;
+with builtins; let
+  cfg = config.vim.languages.lua;
+in {
+  options.vim.languages.lua = {
+    enable = mkEnableOption "Lua language support";
+    treesitter = {
+      enable = mkEnableOption "Enable Lua Treesitter support" // {default = config.vim.languages.enableTreesitter;};
+      package = nvim.types.mkGrammarOption pkgs "lua";
+    };
+    lsp = {
+      enable = mkEnableOption "Enable Lua LSP support via LuaLS" // {default = config.vim.languages.enableLSP;};
+
+      package = mkOption {
+        description = "LuaLS package, or the command to run as a list of strings";
+        type = with types; either package (listOf str);
+        default = pkgs.lua-language-server;
+      };
+
+      neodev.enable = mkEnableOption "Enable neodev.nvim integration, useful for neovim plugin developers";
+    };
+  };
+
+  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.lua-lsp = ''
+        lspconfig.lua_ls.setup {
+          capabilities = capabilities;
+          on_attach = default_on_attach;
+          ${optionalString cfg.lsp.neodev.enable "before_init = require('neodev.lsp').before_init;"}
+          cmd = ${
+          if isList cfg.lsp.package
+          then nvim.lua.expToLua cfg.lsp.package
+          else ''{"${getExe cfg.lsp.package}"}''
+        };
+        }
+      '';
+    })
+
+    (mkIf cfg.lsp.neodev.enable {
+      vim.startPlugins = ["neodev-nvim"];
+      vim.luaConfigRC.neodev = nvim.dag.entryBefore ["lua-lsp"] ''
+        require("neodev").setup({})
+      '';
+    })
+  ]);
+}