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#!/bin/bash

# init variables
tmpDir="$(mktemp -d /tmp/archive.XXXXXX)"
pkgDir="/srv/arch-mirror/arch/arch/archlinuxewe/os/x86_64"
pkgSrcDir="$(dirname $(readlink -f -n "$0"))"
[ "$(hostname)" == "rechenknecht" ] && aufRechenknecht=true || aufRechenknecht=false
force=false
upload=true
updateMe=true

# parse arguments
eval set -- "$(getopt -o f --long force,no-upload,no-selfUpdate -n "$(basename "$0")" -- "$@")"
while true
do
  case $1 in
    -f|--force)
      force=true
      shift
    ;;
    --no-upload)
      upload=false
      shift
    ;;
    --no-selfUpdate)
      updateMe=false
      shift
    ;;
    --)
      shift
      break
    ;;
    *)
      >&2 echo "FEHLER: Verstehe Option \"$1\" doch nicht! Ich beende."
      exit 1
  esac
done

if [ ! $# -eq 0 ]
then
  >&2 echo 'FEHLER: Zu viele Argumente! Ich beende.'
  exit 1
fi

$aufRechenknecht && pkgSrcDir="${pkgSrcDir}/archPackages"
cd "${pkgSrcDir}"

# extract git HEAD
git archive --format tar HEAD | \
  tar -x -C "${tmpDir}" -f -

cd "${tmpDir}"

# update $0
if ${updateMe} && ${aufRechenknecht} && [ -e "$(basename $0)" ] && ! diff -q "$(basename $0)" "$0" &> /dev/null
then
  cp "$(basename $0)" "$0"
  $0 $@
  err=$?
  rm -rf "${tmpDir}"
  exit ${err}
fi

# collect packages
pakete="$( \
  for paket in $( \
    echo */PKGBUILD | \
      sed "s|/PKGBUILD||g" \
    )
  do
    [ -d "${paket}" ] || continue
    . ${paket}/PKGBUILD
    pkgFile="${paket}-${pkgver}-${pkgrel}-${arch[0]}.pkg.tar.xz"
    ${force} || \
      ! ${aufRechenknecht} || \
      [ ! -e "${pkgDir}/${pkgFile}" ] && \
        echo "${paket}"
  done
  )"

if ${aufRechenknecht}
then
# build packages
  for paket in ${pakete}
  do
    cd "${tmpDir}/${paket}"
    rm -f ${paket}-*.pkg.tyr.xz
    makepkg -fcsr || exit $?
    ${upload} && scp ${tmpDir}/${paket}/${paket}-*.pkg.tyr.xz paule@127.0.0.1:${pkgDir}/
  done

# upload packages
  ${upload} && ssh paule@127.0.0.1 ' \
    cd "'${pkgDir}'"
    for paket in '${pakete}'
    do
      alles="$(ls ${paket}*.pkg.tar.xz)"
      anz="$(echo "${alles}" | wc -l)"
      for version in $( \
        echo "${alles}" | \
          sed "s|^.*-\([^-]*-[^-]*\)-[^-]*\$|\1|" | \
          sort -V | \
          head -n$[${anz}-1] \
        )
      do
        rm ${paket}-${version}-*.pkg.tar.xz
      done
    done

# update db
    repo-add \
      '${pkgDir}'/archlinuxewe.db.tar.gz \
      '${pkgDir}'/*.pkg.tar.xz
  '
else

# check packages
  err=false
  for paket in ${pakete}
  do
    . ${paket}/PKGBUILD
    echo "${source}" | \
      grep -q "opensources\.eckner\.net" || \
        continue
    remSum="$(curl -o - "${source#*::}&post=sha256sum" 2> /dev/null)"
    if [ ! "${remSum}" == "${sha256sums}" ]
    then
      echo "sha256sum von ${pkgname} stimmt nicht: ${remSum} vs. ${sha256sums}."
      err=true
    fi

  done
  ${err} && exit 1

  cd "${pkgSrcDir}"
  git push || exit $?

  ${force} && opts="-f" || opts=""

  ssh rechenknecht ~/archPackagesUpdate ${opts} || exit $?
fi

# clean up
rm -rf "${tmpDir}"