use lua locals

Co-authored-by: DianQK <dianqk@dianqk.net>

Author: jyn514

src/doc/rustc-dev-guide/src/building/suggested.md

@@ -125,23 +125,23 @@ configuration. The following code will work for any checkout of rust-lang/rust (
 ```lua
 lspconfig.rust_analyzer.setup {
  root_dir = function()
- default = lspconfig.rust_analyzer.config_def.default_config.root_dir()
+ local default = lspconfig.rust_analyzer.config_def.default_config.root_dir()
  -- the default root detection uses the cargo workspace root.
  -- but for rust-lang/rust, the standard library is in its own workspace.
  -- use the git root instead.
- compiler_config = vim.fs.joinpath(default, "../src/bootstrap/defaults/config.compiler.toml")
+ local compiler_config = vim.fs.joinpath(default, "../src/bootstrap/defaults/config.compiler.toml")
  if vim.fs.basename(default) == "library" and vim.uv.fs_stat(compiler_config) then
  return vim.fs.dirname(default)
  end
  return default
  end,
  on_init = function(client)
  local path = client.workspace_folders[1].name
- config = vim.fs.joinpath(path, "src/etc/rust_analyzer_zed.json")
+ local config = vim.fs.joinpath(path, "src/etc/rust_analyzer_zed.json")
  if vim.uv.fs_stat(config) then
  -- load rust-lang/rust settings
- file = io.open(config)
- json = vim.json.decode(file:read("*a"))
+ local file = io.open(config)
+ local json = vim.json.decode(file:read("*a"))
  client.config.settings["rust-analyzer"] = json.lsp["rust-analyzer"].initialization_options
  client.notify("workspace/didChangeConfiguration", { settings = client.config.settings })
  end