add lua language server using overlays

home.nix

@@ -6,6 +6,10 @@
 
   imports = (import ./programs);
 
+  nixpkgs.overlays = [
+    (import ./overlays/sumneko-lua-language-server)
+  ];
+
   home = {
     username = "salar";
     homeDirectory = "/Users/salar";
@@ -211,6 +215,7 @@
     pkgs.ripgrep
     pkgs.rnix-lsp
     pkgs.shellcheck
+    pkgs.sumneko-lua-language-server
     pkgs.tealdeer
     pkgs.tig
     pkgs.tokei

overlays/sumneko-lua-language-server/default.nix

@@ -0,0 +1,38 @@
+self: super: {
+  sumneko-lua-language-server = super.sumneko-lua-language-server.overrideAttrs (
+    o: rec {
+      version = "2.2.3";
+
+      src = builtins.fetchurl {
+        url = "https://github.com/sumneko/vscode-lua/releases/download/v${version}/lua-${version}.vsix";
+        sha256 = "16rpi6p7rslpdfi37ndy5g9qmvh22qljfk9w15kdrr668hfwp7nm";
+      };
+
+      unpackPhase = ''
+        ${super.pkgs.unzip}/bin/unzip $src
+      '';
+
+      platform = if super.stdenv.isDarwin then "macOS" else "Linux";
+
+      preBuild = "";
+      postBuild = "";
+      nativeBuildInputs = [
+        super.makeWrapper
+      ];
+
+      installPhase = ''
+        mkdir -p $out
+        cp -r extension $out/extras
+        chmod a+x $out/extras/server/bin/$platform/lua-language-server 
+        makeWrapper $out/extras/server/bin/$platform/lua-language-server \
+          $out/bin/lua-language-server \
+          --add-flags "-E -e LANG=en $out/extras/server/main.lua \
+          --logpath='~/.cache/sumneko_lua/log' \
+          --metapath='~/.cache/sumneko_lua/meta'"
+      '';
+
+      meta.platforms = super.lib.platforms.all;
+    }
+  );
+}
+

programs/neovim/init.lua

@@ -33,6 +33,7 @@ _G.load_config = function()
 
   require('nvim-autopairs').setup()
   require("which-key").setup()
+  require('gitsigns').setup()
   require("salargalaxyline")
 
   -- Treesitter
@@ -208,6 +209,42 @@ _G.load_config = function()
     nvim_lsp[lsp].setup { on_attach = on_attach }
   end
 
+  
+-- lua language server
+local sumneko_binary = vim.fn.getenv("HOME").."/.nix-profile/bin/lua-language-server" 
+local runtime_path = vim.split(package.path, ';')
+table.insert(runtime_path, 'lua/?.lua')
+table.insert(runtime_path, 'lua/?/init.lua')
+
+require('lspconfig').sumneko_lua.setup {
+  cmd = { sumneko_binary },
+  on_attach = on_attach,
+  capabilities = capabilities,
+  settings = {
+    Lua = {
+      runtime = {
+        -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
+        version = 'LuaJIT',
+        -- Setup your lua path
+        path = runtime_path,
+      },
+      diagnostics = {
+        -- Get the language server to recognize the `vim` global
+        globals = { 'vim' },
+      },
+      workspace = {
+        -- Make the server aware of Neovim runtime files
+        library = vim.api.nvim_get_runtime_file('', true),
+      },
+      -- Do not send telemetry data containing a randomized but unique identifier
+      telemetry = {
+        enable = false,
+      },
+    },
+  },
+}
+
+
   -- metals
   vim.opt_global.shortmess:remove("F"):append("c")
   metals_config = require("metals").bare_config