#!/bin/bash

preCmds=('hostname')
cmds=()
postCmds=('sync')

for mp in '/' '/boot'; do
  mountpoint -q "${mp}" || continue
  mount \
  | cut -d' ' -f3,6 \
  | grep "^${mp}\s" \
  | cut -d' ' -f2 \
  | grep -qwF 'ro' || continue
  [ "${mp}" = '/boot' ] && [ -d '#ETCDIR#/ports' ] && continue
  preCmds+=('mount -o remount,rw '"${mp}")
  postCmds+=('mount -o remount,ro '"${mp}")
done

if command -v check-kernel >/dev/null; then
  postCmds+=('check-kernel -r')
fi

. #ETCDIR#/update-me.conf

if ! command -v sudo >/dev/null; then
  hasSudo=false
fi

if [ ! "$(whoami)" == "root" ]; then
  if ! "${hasSudo}"; then
    hostname
    err=1
    maxCount=3
    while [ ${err} -eq 1 ] && [ ${maxCount} -gt 0 ]
    do
      su -c "$(readlink -f "$0") || exit 2"
      err=$?
      maxCount=$[${maxCount} - 1]
    done
    exit ${err}
  fi
  pre='sudo'
else
  pre=''
fi

if [ ${#cmds[@]} -eq 0 ]
then
  if [ -d '#ETCDIR#/pacman.d' ]
  then
    cmds=('pacman -Syu' 'pacdiff')
  elif [ -d '#ETCDIR#/ports' ]
  then
    cmds=('ports -u' 'prt-get --install-scripts sysup' 'rejmerge' 'revdep')
  elif [ -d '#ETCDIR#/apt' ]
  then
    cmds=('apt-get update' 'apt-get upgrade' 'apt-get dist-upgrade' 'apt-get autoremove')
  else
    >&2 echo 'Unknown distribution!'
    exit 1
  fi
fi

for cmd in "${preCmds[@]}"
do
  if [ -z "${cmd%%check-kernel*}" ] \
  || [ -z "${cmd%%mount*}" ]; then
    ${pre} ${cmd}
  else
    ${cmd}
  fi
  err=$?
  if [ ${err} -ne 0 ]
  then
    >&2 echo 'Fehler'
    read s
    exit ${err}
  fi
done

for cmd in "${cmds[@]}"
do
  ${pre} ${cmd}
  err=$?
  if [ ${err} -ne 0 ]
  then
    >&2 echo 'Fehler'
    read s
    exit ${err}
  fi
done

for cmd in "${postCmds[@]}"
do
  if [ -z "${cmd%%check-kernel*}" ] \
  || [ -z "${cmd%%mount*}" ]; then
    ${pre} ${cmd}
  else
    ${cmd}
  fi
  err=$?
  if [ ${err} -ne 0 ]
  then
    >&2 echo 'Fehler'
    read s
    exit ${err}
  fi
done

>&2 echo 'Erfolg'
read s
exit 0