nixos-config/home-manager/modules/nushell/config.nu

let carapace_completer = {|spans| 
    carapace $spans.0 nushell $spans | from json
}

# The default config record. This is where much of your global configuration is setup.
$env.config = {
  explore: {
    status: {
      warn: {bg: 'yellow', fg: 'blue'}
      error: {bg: 'yellow', fg: 'blue'}
      info: {bg: 'yellow', fg: 'blue'}
    }

    try: {
      border_color: 'blue'
      highlighted_color: 'white'

      reactive: true
    }
  }

  history: {
    file_format: "sqlite" # "sqlite" or "plaintext"
  }
  completions: {
    algorithm: "fuzzy"  # prefix or fuzzy
    external: {
      enable: true # set to false to prevent nushell looking into $env.PATH to find more suggestions, `false` recommended for WSL users as this look up my be very slow
      completer: $carapace_completer # check 'carapace_completer' above as an example
    }
  }
  filesize: {
    metric: false # true => KB, MB, GB (ISO standard), false => KiB, MiB, GiB (Windows standard)
  }
  show_banner: false

  hooks: {
    command_not_found: { |cmdname| (
      try {
        let candidates = (open $env.command_not_found_db | query db $"select package from Programs where system = '($env.NIX_SYSTEM)' and name = '($cmdname)'")
        if ($candidates | is-empty) {
          return null
        }
        let packages = ($candidates | each {|pkg| $"\tnix shell  nixpkgs#($pkg.package)" } | str join "\n")
        let multiple = if ($candidates | length) > 1 { " one of the following" } else { "" }
        (
          $"The program (ansi $env.config.color_config.shape_external)($cmdname)(ansi reset) " +
          $"is not in your PATH. You can make it available in an ephemeral shell by typing($multiple):\n" +
          $"($packages)"
        )
      }
    )}
  }
  keybindings: [
    {
      name: insert_last_token
      modifier: alt
      keycode: char_.
      mode: emacs
      event: [
        { edit: InsertString, value: " !$" }
        { send: Enter }
      ]
    }
  ]
}