nvim-lspconfig/lua/lspconfig/configs/bashls.lua

-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-- This config is DEPRECATED.
-- Use the configs in `lsp/` instead (requires Nvim 0.11).
--
-- ALL configs in `lua/lspconfig/configs/` will be DELETED.
-- They exist only to support Nvim 0.10 or older.
-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
return {
  default_config = {
    cmd = { 'bash-language-server', 'start' },
    settings = {
      bashIde = {
        -- Glob pattern for finding and parsing shell script files in the workspace.
        -- Used by the background analysis features across files.

        -- Prevent recursive scanning which will cause issues when opening a file
        -- directly in the home directory (e.g. ~/foo.sh).
        --
        -- Default upstream pattern is "**/*@(.sh|.inc|.bash|.command)".
        globPattern = vim.env.GLOB_PATTERN or '*@(.sh|.inc|.bash|.command)',
      },
    },
    filetypes = { 'bash', 'sh' },
    root_dir = function(fname)
      return vim.fs.dirname(vim.fs.find('.git', { path = fname, upward = true })[1])
    end,
    single_file_support = true,
  },
  docs = {
    description = [[
https://github.com/bash-lsp/bash-language-server

`bash-language-server` can be installed via `npm`:
```sh
npm i -g bash-language-server
```

Language server for bash, written using tree sitter in typescript.
]],
  },
}