spacevim/bundle/nvim-lspconfig/lua/lspconfig/server_configurations/elixirls.lua

local util = require 'lspconfig.util'

return {
  default_config = {
    filetypes = { 'elixir', 'eelixir' },
    root_dir = function(fname)
      return util.root_pattern('mix.exs', '.git')(fname) or vim.loop.os_homedir()
    end,
  },
  docs = {
    package_json = 'https://raw.githubusercontent.com/elixir-lsp/vscode-elixir-ls/master/package.json',
    description = [[
https://github.com/elixir-lsp/elixir-ls

`elixir-ls` can be installed by following the instructions [here](https://github.com/elixir-lsp/elixir-ls#building-and-running).

```bash
curl -fLO https://github.com/elixir-lsp/elixir-ls/releases/latest/download/elixir-ls.zip
unzip elixir-ls.zip -d /path/to/elixir-ls
# Unix
chmod +x /path/to/elixir-ls/language_server.sh
```

**By default, elixir-ls doesn't have a `cmd` set.** This is because nvim-lspconfig does not make assumptions about your path. You must add the following to your init.vim or init.lua to set `cmd` to the absolute path ($HOME and ~ are not expanded) of your unzipped elixir-ls.

```lua
require'lspconfig'.elixirls.setup{
    -- Unix
    cmd = { "/path/to/elixir-ls/language_server.sh" };
    -- Windows
    cmd = { "/path/to/elixir-ls/language_server.bat" };
    ...
}
```
]],
    default_config = {
      root_dir = [[root_pattern("mix.exs", ".git") or vim.loop.os_homedir()]],
    },
  },
}