#!/bin/bash

usage() {
  >&2 echo 'Verwendung: '
  >&2 echo "  $0"' [--32] [-f|--force] [-j|--jobs=${jobs}]'
  >&2 echo '    --32:                   Versionen in archlinux32 statt archlinuxewe prüfen'
  >&2 echo '    -f|--force|--noUpdate:  prüfe Versionen unhabhängig von Zeit der letzten Prüfung'
  >&2 echo '    -j|--jobs:              Anzahl parallel auszufuehrender Anfragen'
  >&2 echo '    -m:                     maschinenlesbare Ausgabe erzeugen'
  exit 1
}

curl_it() {
  local source="$1"
  local cache_file
  cache_file=$(
    {
      printf '%s\n' "$1"
      printf '%s\n' "$@" | \
        sort -u
    } | \
      sha512sum | \
      awk '{print $1}'
  )
  shift
  cache_file="${curl_cache}/${cache_file}"
  if [ -s "${cache_file}" ] && \
    [ $(stat -c%Y "${cache_file}") -gt $(($(date +%s)-300)) ]; then
    cat "${cache_file}"
    return
  fi
  tmp_file=$(mktemp)
  curl --compressed -o "${tmp_file}" --connect-timeout 10 -s "$@" "${source}"
  if [ ! -s "${tmp_file}" ]; then
    curl --compressed -o "${tmp_file}" --connect-timeout 10 -s -x socks5://127.0.0.1:9050 "$@" "${source}"
  fi
  local trials=5
  while ! mv "${tmp_file}" "${cache_file}" && \
    [ ${trials} -gt 0 ]; do
    sleep 1
    trials=$((trials-1))
  done
  rm -f "${tmp_file}"
  cat "${cache_file}"
}

me="$(readlink -f $0)"
cd $(dirname "${me}")
versionenDatei="/var/cache/$(basename "$(dirname "${me}")")/lastVersions"
curl_cache="/var/cache/$(basename "$(dirname "${me}")")/curl-cache"
jobs=0
maschinenlesbar=false
force=false
unForce=false
archlinuxewe=true

eval set -- "$(
  getopt \
    -o fj:m \
    --long 32 \
    --long force \
    --long jobs: \
    --long noUpdate \
    -n "$(basename "$0")" \
    -- \
    "$@" \
    || echo "usage"
)"
args=("$@")
optArgs=()

while true
do
  case $1 in
    --32)
      archlinuxewe=false
      versionenDatei="/var/cache/$(basename "$(dirname "${me}")")/lastVersions32"
      optArgs[${#optArgs[@]}]="--32"
    ;;
    -f|--force)
      force=true
      optArgs[${#optArgs[@]}]="-f"
    ;;
    --noUpdate)
      unForce=true
      optArgs[${#optArgs[@]}]="--noUpdate"
    ;;
    -j|--jobs)
      shift
      jobs="$1"
      optArgs[${#optArgs[@]}]="-j"
      optArgs[${#optArgs[@]}]="$1"
    ;;
    -m)
      optArgs[${#optArgs[@]}]="-m"
      maschinenlesbar=true
    ;;
    --)
      shift
      break
    ;;
    *)
      >&2 echo "FEHLER: Verstehe Option \"$1\" doch nicht! Ich beende."
      rm -rf "${tmpDir}"
      usage
  esac
  shift
done

[ ! -r "${versionenDatei}" ] && force=true
versionenErmitteln=${force}
! ${versionenErmitteln} && [ "$(head -n1 "${versionenDatei}")" -le $[$(date "+%s")-300] ] && versionenErmitteln=true
${maschinenlesbar} && versionenErmitteln=true
${unForce} && versionenErmitteln=false
versionenSchreiben=${versionenErmitteln}
[ ! -w "${versionenDatei}" ] && versionenSchreiben=false
${maschinenlesbar} && versionenSchreiben=false

if [ $# -eq 0 ]
then
  if ${versionenSchreiben}
  then
    tmpFile="$(mktemp /tmp/versionen.XXXXXX)"
    date "+%s" > "${tmpFile}"
    set -o pipefail
    if ${archlinuxewe}; then
      ${me} "${args[@]}" $(echo */PKGBUILD | tr " " "\n" | sed "s|/PKGBUILD||") | tee -a "${tmpFile}"
      err=$?
    else
      if ! mountpoint -q /mnt/archlinux32; then
        mount /mnt/archlinux32
      fi
      /usr/src/archlinux32/devops/watch-versions | sed 's/$/ (arch32)/' | tee -a "${tmpFile}"
      ${me} "${args[@]}" $(echo */PKGBUILD | tr " " "\n" | sed "s|/PKGBUILD||" | grep '32$') | tee -a "${tmpFile}"
      err=$?
    fi
    set +o pipefail
    cat "${tmpFile}" > "${versionenDatei}"
    rm "${tmpFile}"
  elif ! ${versionenErmitteln}
  then
    sed '1d' "${versionenDatei}"
    err=$?
  elif ${archlinuxewe}; then
    ${me} "${args[@]}" $(echo */PKGBUILD | tr " " "\n" | sed "s|/PKGBUILD||")
    err=$?
  else
    /usr/src/archlinux32/devops/watch-versions | sed 's/$/ (arch32)/'
    ${me} "${args[@]}" $(echo */PKGBUILD | tr " " "\n" | sed "s|/PKGBUILD||" | grep '32$')
    err=$?
  fi
  exit ${err}

elif [ $# -eq 1 ] && ${versionenErmitteln}
then

  if ${archlinuxewe}; then
    . $1/PKGBUILD
    srcKnown=false
  else
    eval "$(
      grep '^pkgname=' $1/PKGBUILD
      grep '^pkgver=' $1/PKGBUILD
    )"
    source=(dummy)
  fi

  for src in "${source[@]}" "${source_i686[@]}" "${source_x86_64[@]}"
  do

    if ! ${archlinuxewe}; then
      remVer=$(
        find '/mnt/archlinux32' -regextype sed \
          -type f \
          -regex '.*/'"${1%32}"'-[^-]\+-[^-]\+-any\.pkg\.tar\.xz' \
          -printf '%f\n' | \
          sed '
            s/-[^-]\+-[^-]\+$//
            s/^.*-//
          ' | \
          sort -V | \
          tail -n1
      )
      srcKnown=true
      continue
    fi

    src_name="${src%%::*}"
    src="${src#*::}"

    if [ "${pkgname}" = 'pacman-static' ]
    then
      git submodule update "${pkgname}"
      eval "$(
        sed -n '
          s/^pkgver=/remVer=/
          T
          p
        ' "${pkgname}/PKGBUILD"
      )"
    elif echo "${src}" | \
      grep -qF '/ssacli-'; then
      centosVer=$(
        curl_it "${src%/*/*/*/*}/" | \
          tr '"' '\n' | \
          sed '
            s,^\([0-9]\+\)/$,\1,
            t
            d
          ' | \
          sort -V | \
          tail -n1
      )
      remVer=$(
        curl_it "${src%/*/*/*/*}/${centosVer}/x86_64/current/" | \
          tr '"' '\n' | \
          sed '
            s,^ssacli-\([0-9.]\+\)-\([0-9.]\+\)\.x86_64\.rpm$,\1_\2,
            t
            d
          ' | \
          sort -V | \
          tail -n1
      )
    elif [ "${pkgname}" = 'adduser' ]
    then
      remVer=$(
        curl_it "${source[0]#*::}" '-L' | \
          grep '^# Version: ' | \
          sed 's|^# Version: \+||'
      )
    elif [ "${pkgname}" = 'dropbox' ]
    then
      remVer=$(
        curl_it 'https://www.dropboxforum.com/t5/Desktop-client-builds/bd-p/101003016' | \
          tr '<>' '\n' | \
          sed '
            s/^\s*Stable Build \([0-9.-]\+\)\s*$/\1/
            t
            d
          ' | \
          sort -V | \
          tail -n1
      )
    elif [ "${pkgname}" = 'tightvnc' ]
    then
      remVer=$(
        curl_it 'https://www.tightvnc.com/download-old.php' | \
          tr '"' '\n' | \
          grep -x 'https://www\.tightvnc\.com/download/\([0-9.]\+\)/tightvnc-\1_unixsrc\.tar\.bz2' | \
          sed 's|^https://www\.tightvnc\.com/download/\([0-9.]\+\)/tightvnc-\1_unixsrc\.tar\.bz2$|\1|'
      )
    elif [ "${pkgname}" = 'g95' ]
    then
      remVer='0.94'
    elif [ "${pkgname}" = 'pgplot-for-ifeffit' ]
    then
      remVer=$(
        curl_it "ftp://ftp.astro.caltech.edu/pub/pgplot/" | \
          grep "\spgplot[0-9.]\+\.tar\.gz -> \S\+\$" | \
          sed "s|^.*\spgplot\([0-9.]\+\)\.tar\.gz -> \S\+\$|\1|" | \
          sort -V | \
          tail -n1
      )
    elif [ "${pkgname}" == "wurzel-old" ]
    then
      remVer="0.1"
    elif echo "${src}" | \
      grep -q '^http://ftp.linux.org.uk/.*/netkit/'
    then
      quVer="${src%/*}/"
      remVer="$(
        curl_it "${quVer}" | \
          tr '<>' '\n' | \
          grep "^${pkgname#netkit-}-[0-9.-]\+\.tar\.gz\$" | \
          sed "s|^${pkgname#netkit-}-\([0-9.-]\+\)\.tar\.gz\$|\1|" | \
          sort -V | \
          tail -n1
      )"
    elif [ "${pkgname}" == "archiso32" ] || [ "${pkgname}" == 'archiso-dual' ]
    then
      git -C /usr/src/archlinux/archiso fetch upstream
      git -C /usr/src/archlinux32/archiso32 fetch origin
      remVer="$(
        {
          git -C /usr/src/archlinux/archiso tag
          git -C /usr/src/archlinux32/archiso32 tag
        } | \
          sed -n '
            s/^\(i686-\|dual-\)v//
            T
            p
          ' | \
          sort -V | \
          tail -n1
      )"
    elif [ "${pkgname}" == 'devtools32' ]
    then
      git -C /usr/src/archlinux/devtools fetch upstream
      git -C /usr/src/archlinux32/devtools32 fetch origin
      remVer="$(
        (
          git -C /usr/src/archlinux/devtools archive --format=tar upstream/master -- Makefile | \
            tar -Ox | \
            grep -m1 '^V=[0-9.]\+$' | \
            cut -d= -f2
          git -C /usr/src/archlinux32/devtools32 tag | \
            sed -n '
              s/^v//
              /^[0-9.]\+$/p
            '
        ) | \
          sort -V | \
          tail -n1
      )"
    elif [ "${pkgname}" == 'pacman-mirrorlist32' ]
    then
      git -C "/usr/src/archlinux32/packages" fetch origin >/dev/null 2>&1
      remVer=$(
        {
          git -C "/usr/src/archlinux32/packages" archive origin/master -- core/pacman-mirrorlist/PKGBUILD | \
            tar -Ox | \
            grep -m1 '^pkgver=[0-9.]\+$' | \
            cut -d= -f2
        } | \
          sort -V | \
          tail -n1
      )
    elif echo "${src}" | \
      grep -q '//www\.abisource\.com/'
    then
      quVer="$(
        echo "${src}" | \
          sed 's|\(/[^/]\+\)\{3\}$|/|'
      )"
      remVer="$(
        curl_it "${quVer}" | \
          tr '<>' '\n' | \
          sed -n '
            s,^a href="\([0-9.]\+\)/"$,\1,
            T
            p
          ' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q '//download\.virtualbox\.org/'
    then
      quVer="$(
        echo "${src}" | \
          sed 's|/[^/]\+/[^/]\+$||'
      )"
      remVer="$(
        curl_it "${quVer}/" | \
          sed -n '
            s,^.*<a href="\([0-9.]\+\)/">.*$,\1,
            T
            p
          ' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q "//www\.mpich\.org/"
    then
      quVer="${src%/*/*}/"
      aVers="$(
        curl_it "${quVer}" | \
          tr '"' '\n' | \
          grep '^[0-9.]\+/$' | \
          sed 's|/$||'
      )"
      if [ ! "${pkgname}" == "mpich" ]
      then
        aVers="$(
          (
            echo "${aVers}"
            echo "${pkgname#mpich} %%%SCHNIPP%%%"
          ) |
            sort -V | \
            sed '/%%%SCHNIPP%%%/q' | \
            grep -v '%%%SCHNIPP%%%'
        )"
      fi
      remVer="$(
        echo "${aVers}" | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q '^git://anonscm\.debian\.org/\|^git\(+https\?\)\?://github\.com/.*#tag='
    then
      src="${src#git+}"
      remVer="$(
        git ls-remote --tags "${src%#*}" | \
          awk '{print $2}' | \
          grep '^refs/tags/v[0-9.]\+$' | \
          sed 's|^refs/tags/v\([0-9.]\+\)$|\1|' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q '^git\(+[^:]\+\)\?://[^#]\+\(#commit=[^#]\+\)\?$'
    then
      remVer=$(
        cd "$1"
        git -C "${src_name}" fetch --all -p >/dev/null 2>&1
        _commit='HEAD'
        srcdir=$(pwd)
        pkgver
      )
    elif echo "${src}" | \
      grep -q "^https://pypi\.python\.org/packages/"
    then
      qu=$(
        echo "${src}" | \
          sed 's|^.*/packages/.*/\([^/]\+\)-[^/-]\+\.tar\.gz$|https://pypi.org/project/\1/|'
      )
      _pkgname=$(
        echo "${qu}" | \
          sed '
            s|/$||
            s|^.*/||
          '
      )
      remVer="$(
        curl_it "${qu}" | \
          tr '"' '\n' | \
          grep "^/project/\(python-\)\?${_pkgname}/[0-9.-]\+/\$" | \
          sed "s|^/project/\(python-\)\?${_pkgname}/\([0-9.-]\+\)/\$|\2|" | \
          sort -V | \
          tail -n1
      )"
      remHash="$(
        curl_it "${qu}${remVer}/" | \
          tr '"#' '\n' | \
          sponge | \
          grep -m1 "^https://files\.pythonhosted\.org/packages/.*/[0-9a-f]\{60\}/${_pkgname}-${remVer}\.tar\.\(gz\|bz2\|xz\)\$" | \
          sed 's|/[^/]\+$|/|; s|^https://files\.pythonhosted\.org/packages/|/|'
      )"
      locHash="$(
        echo "${src}" | \
          sed 's|/[^/]\+$|/|; s|^https://pypi\.python\.org/packages/|/|'
      )"
      ${maschinenlesbar} && \
        [ "${remHash}" != "${locHash}" ] && \
        echo "sedExtra='s@${locHash}@${remHash}@g;'"
    elif echo "${src}" | \
      grep -q "//bundles\.openttdcoop\.org/"
    then
      qu="$(
        echo "${src}" | \
          sed 's|^\(https\?://\([^/]\+/\)\{3\}\).*$|\1|'
      )"
      remVer="$(
        curl_it "${qu}" | \
          tr "\"" "\n" | \
          grep '^[0-9.]\+/$' | \
          sed 's|/$||' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q "//opensources\.eckner\.net/"
    then
      qu=${src#*::}
      qu=${qu%-*}
      quNam=${qu#*=}
      remVer=$( \
        curl_it "$(\
          echo "${qu}" | \
            sed "s|\?dl=|?ls=|" \
          )" | \
          tr "<>" "\n\n" | \
          grep "^${quNam}-" | \
          sed "s|^${quNam}-||" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//git\.eckner\.net/"
    then
      quVer="${src%/*/*}"
      quNam=$(
        printf '%s\n' "${src}" | \
          sed '
            s,^.*/,,
            s,-[0-9.]\+\.tar\.xz$,,
          '
      )
      remVer=$( \
        curl_it "${quVer}" | \
          tr "<>'\"" '\n' | \
          sed -n '
            s,^/'"${quVer#*//*/}"'/snapshot/'"${quNam}"'-\([0-9.]\+\)\.tar\.xz$,\1,
            T
            p
          ' | \
          sort -V | \
          tail -n1
      )
    elif echo "${src}" | \
      grep -q "//\(search\.m\?\)\?cpan\.org/\|//cpan\.metacpan\.org/authors/\|cpan\.org/modules/by-module/"
    then
      quVer=$( \
        echo "${src%/*}/" | \
          sed 's|//\(search\.m\?\)\?cpan\.org/|//www.cpan.org/|' | \
          sed 's|/CPAN/|/|'
      )
      quNam=${src##*/}
      quNam=${quNam%-*}
      quEnd=$( \
        echo "${src##*-}" | \
          sed "s|^v\?[0-9.]*||" | \
          sed 's|\.|\\\.|'
      )
      if [ "${pkgname}" = 'perl-chi' ] || \
        [ "${pkgname}" = 'perl-perl-metrics-simple' ]
      then
        pre='s|\(\...\)$|\10|'
        post='s|\(\...\)0$|\1|'
      elif [ "${pkgname}" = 'perl-opengl' ] || \
        [ "${pkgname}" = 'perl-array-diff' ] || \
        [ "${pkgname}" = 'perl-module-cpants-analyse' ] || \
        [ "${pkgname}" = 'perl-data-clean' ]
      then
        pre='s|\(\...\)\(.\)|\1.\2|'
        post='s|\(\...\)\.\(.\)|\1\2|'
      else
        pre=''
        post=''
      fi
      remVer=$( \
        curl_it "${quVer}" | \
          tr '"<>' '\n' | \
          grep "^${quNam}-v\?[0-9.-]*\.${quEnd}\$" | \
          sed "s|^${quNam}-v\?\([0-9.-]*\)\.${quEnd}\$|\1|" | \
          sed "${pre}" | \
          sort -V | \
          tail -n1 | \
          sed "${post}"
      )
    elif echo "${src}" | \
      grep -q "ftp://"
    then
      quVer="${src%/*}/"
      quNam=${src##*/}
      quEnd=$( \
        echo "${quNam}" |
          sed "s|^.*v\?[0-9.]*[0-9]||" \
      )
      quNam=$( \
        echo ${quNam} | \
          sed "s|v\?[0-9.]\+.*\$||" \
      )
      tmpVer=$( \
        curl_it "${quVer}" | \
          awk '{print $9}' | \
          grep "^${quNam}v\?[0-9.]*${quEnd}\$" | \
          sed "s|^${quNam}v\?\([0-9.]*\)${quEnd}\$|\1|" | \
          sort -V | \
          tail -n1 \
      )
      [ "${pkgname}" == "pgplot" ] && remVer="${tmpVer:0:1}.${tmpVer:1:1}.${tmpVer:2}" || remVer="${tmpVer}"
    elif echo "${src}" | \
      grep -q '//arch\.eckner\.net/\|//mirror\.archlinux32\.org/'
    then
      quVer="${src%/*}"
      quVer="${quVer#*::}"
      quNam=${src##*/}
      quNam=${quNam%-*}
      quNam=${quNam%-*}
      quNam=${quNam%-*}
      quEnd=${src##*-}
      quEnd=${quEnd#*.}
      remVer=$( \
        curl_it "${quVer}/" | \
          tr "\"" "\n" | \
          grep "^${quNam}\(-[^-]*\)\{3\}\.${quEnd}\$" | \
          sed "s|^${quNam}-\([^-]*\)\(-[^-]*\)\{2\}\.${quEnd}\$|\1|" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q '^https\?://github\.com/'
    then
      quVer=$(
        echo "${src#*::}" | \
          sed '
            s|/archive/[^/]*$|/releases|
            s|/download/[^/]*/[^/]*$||
            s|http:|https:|
          '
      )
      quNam=$(
        echo "/${quVer#*.com/}/tag/" | \
          tr '[[:upper:]]' '[[:lower:]]'
      )
      remVer=$( \
        curl_it "${quVer}" | \
          tr "\"" "\n" | \
          tr '[[:upper:]]' '[[:lower:]]' | \
          grep "^${quNam}v\?[0-9.]\+\$" | \
          sed "s|^${quNam}v\?||" | \
          (
            if [ "${pkgname}" == "conky-irc" ]
            then
              grep -v '\.999$'
            else
              cat
            fi
          ) | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q '^https\?://git\.archlinux32\.org/'
    then
      quVer=$(
        echo "${src#*::}" | \
          sed '
            s|/archive/[^/]*$|/releases|
            s|/download/[^/]*/[^/]*$||
            s|http:|https:|
          '
      )
      quNam=$(
        echo "/${quVer#*.org/}" | \
          tr '[[:upper:]]' '[[:lower:]]' | \
          sed 's,/releases$,/archive/,'
      )
      remVer=$( \
        curl_it "${quVer}" | \
          tr "\"" "\n" | \
          tr '[[:upper:]]' '[[:lower:]]' | \
          grep "^${quNam}v\?[0-9.]\+\.tar\.gz\$" | \
          sed '
            s|^'"${quNam}"'v\?||
            s/\.tar\.gz$//
          ' | \
          if [ "${pkgname}" = 'asp32' ]; then
            grep -vx '[12]'
          else
            cat
          fi | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//\(\(pr\)\?downloads\.\)\?sourceforge\.net/"
    then
      quVer=$( \
        echo "${src}" | \
          sed '
            s,^https\?://\(\(pr\)\?downloads\.\)\?sourceforge\.net/,,
            s,^sourceforge/,,
            s,^projects\?/,,
          ' | \
          sed '
            s,^\([^/]\+\)/[^/]\+$,\1/\1,
            t end
            s,^\([^/]\+\)/\(files/\)\?\([^/]\+\)/[0-9.]\+/[^/]\+$,\1/\3,
            t end
            w /dev/stderr
            d
            :end
            s,/scidavis$,/SciDAVis,
            s,\([^/]\+\)/\([^/]\+\),https://sourceforge.net/projects/\1/files/\2/,
          '
      )
      remVer=$( \
        curl_it "${quVer}" | \
          tr "\"" "\n" | \
          grep "^${quVer#*sourceforge.net}\(${pkgname}\(-\|%20\)\)\?[0-9.-]" | \
          sed '
            '"s@/${pkgname}\(-\|%20\)@/@"'
            s|\.tar.*$||
            '"s|^${quVer#*sourceforge.net}\([0-9.-]\+\).*\$|\1|"'
            s|-$||
            s|\.$||
          ' | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q '//support\.hdfgroup\.org/'
    then
      quVer="${src%/*/*/*}/"
      quNam="${src#${quVer}}"
      quNam="${quNam%%.*}"
      quNam="$(echo "${quNam}" | tr '[:lower:]' '[:upper:]')"
      remVer=$( \
        curl_it "${quVer}" | \
          tr '"' '\n' | \
          grep "^${quNam}\.[.0-9]\+/\$" | \
          sed "s|^${quNam}\.\(.*\)/\$|\1|" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q 'https://bitbucket\.org/.*/get/[^/]\+$'
    then
      srcPreNam="$(
        echo "${src}" | \
          sed 's|^.*/\([^/0-9]\+_\)[0-9][^/]\+$|\1|'
      )"
      srcEndg="$(
        echo "${src}" | \
          sed 's|^.*\(\.tar[^/]*\)$|\1|' | \
          sed 's|\.|\\.|g'
      )"
      remVer="$(
        curl_it "${src%/get/*}/downloads/?tab=tags" | \
          tr '"' '\n' | \
          grep "${srcEndg}\$" | \
          sed "s|^.*/${srcPreNam}\(.*\)${srcEndg}\$|\1|" | \
          tr '_' '.' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q '^https\?://lilypond\.org/'
    then
      quVer="${src%/*}/"
      remVer="$( \
        curl_it "${quVer}" | \
          tr '"<>' '\n\n\n' | \
          grep "^lilypond-[0-9.]\+\(-[0-9]\+\.documentation\)\?\.t\(ar\(\.[gx]z\|\.bz2\)\?\|gz\)\$" | \
          sed "s@^lilypond-\([0-9.]\+\)\(-[0-9]\+\.documentation\)\?\.t\(ar\(\.[gx]z\|\.bz2\)\?\|gz\)\$@\1@" | \
          tr '_' '.' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -qF '//www.cybernoia.de/'; then
      quVer="${src%/*}.html"
      remVer=$(
        curl_it "${quVer}" | \
          tr '<>' '\n' | \
          sed -n '
            s,^a href="'"${pkgname}/${pkgname}"'-\([0-9.]\+\)\.tar\.gz"$,\1,
            T
            p
          '
      )
    elif echo "${src}" | \
      grep -q "$(
        printf '^https\\?://%s/\|' \
          'alpine\.freeiz\.com' \
          'bitbucket\.org' \
          'bindfs\.org' \
          'dl\.suckless\.org' \
          'download\.osgeo\.org' \
          'ftp\.daper\.net' \
          'isl\.gforge\.inria\.fr' \
          'pkgbuild\.com' \
          'qgis\.org' \
          'sources\.archlinux32\.org' \
          'webhome\.phy\.duke\.edu' \
          'www\.gaia-gis\.it' \
          'www\.hashcash\.org' \
          'www\.iozone\.org' \
          'www\.vandenoever\.info' \
          'www\.wurzel\.org' \
          'www.xcrysden.org' \
          | sed 's@\\|$@\n@'
      )"
    then
      for _pkgname in "${provides[@]}"; do
        if [ "${pkgname#${_pkgname%=*}}" != "${pkgname}" ]; then
          pkgname="${_pkgname%=*}"
          break
        fi
      done
      quVer="${src%/*}/"
      remVer="$( \
        curl_it "${quVer}" | \
          tr '"<>' '\n\n\n' | \
          grep "^${pkgname}\(-src\)\?-\?v\?[0-9._]\+[a-z]\?\.t\(ar\(\.[gx]z\|\.bz2\)\?\|gz\)\$" | \
          sed "s@^${pkgname}\(-src\)\?-\?v\?\([0-9._]\+[a-z]\?\)\.t\(ar\(\.[gx]z\|\.bz2\)\?\|gz\)\$@\2@" | \
          tr '_' '.' | \
          sort -V | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q '^https\?://\(www\.\)\?paraview\.org/files/'
    then
      remVerz="$(
        echo "${src}" | \
          sed 's|/v[0-9.]\+/ParaView-v[0-9.]\+\.tar\.gz$|/|' | \
          sed 's|^\(http://\)|\1www.|'
      )"
      for mainVer in $(
          curl_it "${remVerz}" | \
            tr ' >' '\n' | \
            grep '^href="v[0-9.]\+/"$' | \
            sed 's|href="v\([0-9.]\+\)/"$|\1|' | \
            sort -Vr
        )
      do
        remVer="$(
          curl_it "${remVerz}v${mainVer}/" | \
            tr ' >' '\n' | \
            grep '^href="ParaView-v[0-9.]\+\.tar\.gz"$' | \
            sed 's|^href="ParaView-v\([0-9.]\+\)\.tar\.gz"$|\1|' | \
            sort -V | \
            tail -n1
        )"
        [ -n "${remVer}" ] && break
      done
    elif echo "${src}" | \
      grep -q '^https://download\.kde\.org/stable/plasma/'
    then
      remVerz=$(
        echo "${src}" | \
          sed 's|\(/[^/]\+\)\{2\}$|/|'
      )
      for mainVer in $(
          curl_it "${remVerz}" | \
            tr '"' '\n' | \
            grep '^[0-9.]\+/$' | \
            sed 's|/$||' | \
            sort -Vr
        )
      do
        remVer=$(
          curl_it "${remVerz}${mainVer}/" | \
            tr '"' '\n' | \
            grep '^oxygen-fonts-[0-9.]\+\.tar\.xz$' | \
            sed 's|^oxygen-fonts-\([0-9.]\+\)\.tar\.xz$|\1|' | \
            sort -V | \
            tail -n1
        )
        [ -n "${remVer}" ] && break
      done
    elif echo "${src}" | \
      grep -q '^https://archive\.apache\.org/'
    then
      remVerz="$(
        echo "${src}" | \
          sed 's|[^/]\+/[^/]\+$||'
      )"
      for mainVer in $(
          curl_it "${remVerz}" | \
            tr '"' '\n' | \
            grep "^${pkgname#apache-}-[0-9.]\+/\$" | \
            sed "s|^${pkgname#apache-}-\([0-9.]\+\)/\$|\1|" | \
            sort -Vr
        )
      do
        remVer="$(
          curl_it "${remVerz}${pkgname#apache-}-${mainVer}/" | \
            tr '"' '\n' | \
            grep "^${pkgname#apache-}-[0-9.]\+\.t\(ar\.\)\?\(gz\|bz2\|xz\)\$" | \
            sed "s@^${pkgname#apache-}-\([0-9.]\+\)\.t\(ar\.\)\?\(gz\|bz2\|xz\)\$@\1@" | \
            sort -V | \
            tail -n1
        )"
        [ -n "${remVer}" ] && break
      done
    elif echo "${src}" | \
      grep -q "http://www\.mkgmap\.org\.uk/download"
    then
      remUrl="$(
        echo "${src}" | \
          sed 's|-r[0-9]\+\.zip$|.html|'
      )"
      remVer="r$(
        curl_it "${remUrl}" | \
          grep '"text: current()\.version"' | \
          tr '<>' '\n' |
          grep '^[0-9]\+$' | \
          sort -n | \
          tail -n1
      )"
    elif echo "${src}" | \
      grep -q '://semiletov\.org/[^/]*/dloads/'
    then
      remVer=$(
        curl_it "${source%%/dloads/*}/" | \
          tr '"' '\n' | \
          sed -n '
            s,^\(http://.*/\|dloads/\|\)'"${pkgname}"'-\([0-9.]\+\)\.tar\.bz2$,\2,
            T
            p
          '
      )
    else
      continue
    fi
    srcKnown=true
    break
  done

  if ! ${srcKnown}
  then
    printf '%s: Unknown source:\n' "$1"
    printf "'%s'\n" "${source[@]}" "${source_i686[@]}" "${source_x86_64[@]}"
    exit 1
  fi

  if ${maschinenlesbar}
  then
    echo "remVer='${remVer}'"
    echo "pkgver='${pkgver}'"
    echo "pkgrel='${pkgrel}'"
  else
    if [ ! "${pkgver}" == "${remVer}" ]
    then
      if ! ${archlinuxewe}; then
        printf '(32) '
      fi
      echo "$1: ${pkgname}: ${remVer} vs. ${pkgver}" | \
        sed "s|^\([^:]\+\): \1:|\1:|"
    fi
  fi

elif ${versionenErmitteln}
then
  echo "$@" | \
    tr " " "\n" | \
    parallel -j${jobs} "${me}" "${optArgs[@]}" {} \;
  exit $?

else
  for s in "$@"
  do
    grep "^${s}:" "${versionenDatei}"
  done
fi