#!/usr/bin/env sh
#
# Custom functions for debian-like systems.
#

# Machine architecture
trashman_debian_arch() {
  local arch="`uname -m`"

  # Fix arch
  if [ "$arch" = "x86_64" ]; then
    arch="amd64"
  fi

  echo $arch
}

# Check if package is installed
trashman_apt_check() {
  if [ -z "$1" ]; then
    return
  fi

  #dpkg -s $1 > /dev/null 2>&1
  # See https://stackoverflow.com/questions/1298066/check-if-a-package-is-installed-and-then-install-it-if-its-not#1298103
  dpkg-query -W -f='${Status}' $1 > /dev/null 2>&1 | grep -q '^install ok'
  return $?
}

trashman_apt_update() {
  $SUDO apt-get update
}

trashman_apt_install() {
  if [ -z "$1" ]; then
    return
  fi

  trashman_apt_update

  local install=""

  for package in $*; do
    if ! trashman_apt_check $package; then
      install="$install $package"
    fi
  done

  LC_ALL=C DEBIAN_FRONTEND=noninteractive $SUDO apt-get install -y $install || exit 1
}

# Install an apt repository key
trashman_install_apt_key() {
  local orig="$1"
  local dest="$2"
  local base_dest="$3"

  if [ ! -e "$orig" ]; then
    exit 1
  fi

  if [ -z "$base_dest" ]; then
    base_dest="/etc/apt/trusted.gpg.d"
  fi

  $SUDO cp $orig $base_dest/$dest || exit 1
  $SUDO chown root.root $base_dest/$dest && $SUDO chmod 644 $base_dest/$dest || exit 1
}

# Determine Debian major version name
trashman_debian_major_version_name() {
  if [ ! -e "/etc/debian_version" ]; then
    return 1
  fi

  local number="`cut -d . -f 1 /etc/debian_version`"

  if [ "$number" = "12" ]; then
    echo "bookworm"
  elif [ "$number" = "11" ]; then
    echo "bullseye"
  elif [ "$number" = "10" ]; then
    echo "buster"
  elif [ "$number" = "9" ]; then
    echo "stretch"
  fi
}