fix: don't error if lspconfig is not installed

lua/neoconf/health.lua

@@ -44,9 +44,9 @@ function M.check()
     warn("**neodev.nvim** is not installed. You won't get any proper completion for your Neovim config.")
   end
 
-  local _, lspconfig = pcall(require, "lspconfig.util")
+  local has_lspconfig, lspconfig = pcall(require, "lspconfig.util")
 
-  if lspconfig then
+  if has_lspconfig then
     ok("**lspconfig** is installed")
     local available = lspconfig.available_servers()
     if vim.tbl_contains(available, "jsonls") then
@@ -60,7 +60,7 @@ function M.check()
       warn("**lspconfig lua_ls** is not installed? You won't get any auto completion in your lua settings files")
     end
   else
-    error("**lspconfig** not installed?")
+    warn("**lspconfig** not installed?")
   end
 end
 

lua/neoconf/util.lua

@@ -23,20 +23,35 @@ function M.merge(...)
 end
 
 function M.root_pattern(...)
-  return require("lspconfig.util").root_pattern(...)
+  local has_lspconfig, lsputil = pcall(require, "lspconfig.util")
+  if has_lspconfig then
+    return lsputil.root_pattern(...)
+  end
+  local patterns = vim.tbl_flatten({ ... })
+  return function(startpath)
+    local results = vim.fs.find(patterns, { upward = true, path = startpath })
+    return not vim.tbl_isempty(results) and vim.fs.dirname(results[1])
+  end
 end
 
 function M.find_git_ancestor(...)
-  return require("lspconfig.util").find_git_ancestor(...)
+  local has_lspconfig, lsputil = pcall(require, "lspconfig.util")
+  if has_lspconfig then
+    return lsputil.find_git_ancestor(...)
+  end
 end
 
 function M.has_lspconfig(server)
-  return vim.tbl_contains(require("lspconfig.util").available_servers(), server)
+  local has_lspconfig, lsputil = pcall(require, "lspconfig.util")
+  return has_lspconfig and vim.tbl_contains(lsputil.available_servers(), server)
 end
 
 ---@param opts { on_config: fun(config, root_dir:string, original_config), root_dir: fun(), name: string }
 function M.on_config(opts)
-  local lsputil = require("lspconfig.util")
+  local has_lspconfig, lsputil = pcall(require, "lspconfig.util")
+  if not has_lspconfig then
+    return
+  end
   local hook = lsputil.add_hook_after
 
   lsputil.on_setup = hook(lsputil.on_setup, function(initial_config)