nvim: add nil_ls language server for nix files

Author: cbrxyz

.aerospace.toml

@@ -73,7 +73,7 @@ inner.horizontal = 0
 inner.vertical =   0
 outer.left =       3
 outer.bottom =     3
-outer.top =        [{ monitor.main = 8 }, { monitor.secondary = 42 }, 8]
+outer.top =        [{ monitor.main = 42 }, { monitor.secondary = 42 }, 8]
 outer.right =      3
 
 [workspace-to-monitor-force-assignment]

nvim/lsp/nil_ls.lua

@@ -0,0 +1,17 @@
+---@brief
+---
+--- https://github.com/oxalica/nil
+---
+--- A new language server for Nix Expression Language.
+---
+--- If you are using Nix with Flakes support, run `nix profile install github:oxalica/nil` to install.
+--- Check the repository README for more information.
+---
+--- _See an example config at https://github.com/oxalica/nil/blob/main/dev/nvim-lsp.nix._
+
+---@type vim.lsp.Config
+return {
+	cmd = { "nil" },
+	filetypes = { "nix" },
+	root_markers = { "flake.nix", ".git" },
+}

nvim/lua/plugins/lsp.lua

@@ -72,22 +72,22 @@ return {
 					vim.diagnostic.config({
 						virtual_text = true,
 					})
+
+					-- Enable LSP servers
+					vim.lsp.enable("nil_ls")
+					vim.lsp.enable("clangd")
+					vim.lsp.enable("yamlls")
+					vim.lsp.enable("lua_ls")
+					vim.lsp.enable("pyright")
+					vim.lsp.enable("ruff")
+					vim.lsp.enable("starpls")
+					vim.lsp.enable("beancount")
+					vim.lsp.enable("ts_ls")
+					vim.lsp.enable("jsonls")
+					vim.lsp.enable("ltex")
+					vim.lsp.enable("bashls")
 				end,
 			})
-
-			-- this is named cameron_clangd to avoid conflicts with the existing
-			-- clangd definition, which is taking precedence, something to fix later!
-			vim.lsp.enable("clangd")
-			vim.lsp.enable("yamlls")
-			vim.lsp.enable("lua_ls")
-			vim.lsp.enable("pyright")
-			vim.lsp.enable("ruff")
-			vim.lsp.enable("starpls")
-			vim.lsp.enable("beancount")
-			vim.lsp.enable("ts_ls")
-			vim.lsp.enable("jsonls")
-			vim.lsp.enable("ltex")
-			vim.lsp.enable("bashls")
 		end,
 	},
 	{