#!/bin/bash
set -euo pipefail
cd -- "$(dirname -- "$0")"

function install_dotfiles() {
  local home
  local dotfile
  home=$(eval echo ~"${SUDO_USER:-$(id -un)}")
  for dotfile in .*; do
    [[ $dotfile =~ ^(\.\.?|\.git)$ ]] && continue

    dotfile=$(realpath "$dotfile")
    (
      cd -- "$home"
      ln -svf "$dotfile" .
    )
  done
}

function install_apt_packages() {
  local packages
  local package
  packages=()
  for package in etc/apt/sources.list.d/*.list; do
    package=${package##*/}
    package=${package%.list}
    packages+=("$package")
  done

  rsync -rv etc/apt/keyrings/ /usr/share/keyrings/
  rsync -rv etc/apt/sources.list.d/ /etc/apt/sources.list.d/
  apt update
  apt install -y "${packages[@]}"
}

install_dotfiles
(($(id -u) == 0)) \
  && [[ -d /etc/apt/sources.list.d ]] \
  && install_apt_packages