#!/bin/bash

usage() {
  >&2 echo 'Verwendung: '
  >&2 echo "  $0"' [--32] [-f|--force] [-n|--no-cache] [-j|--jobs=${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="$1"
  local cache_file
  local i
  cache_file=$(
    {
      printf '%s\n' "$1"
      printf '%s\n' "$@" | \
        sort -u
    } | \
      sha512sum | \
      awk '{print $1}'
  )
  shift
  cache_file="${curl_cache}/${cache_file}"
  if ${use_cache} && \
    [ -s "${cache_file}" ] && \
    [ "0$(stat -c%Y "${cache_file}")" -gt "$(($(date +%s)-86400))" ] &&
    ! grep -qiF 'access denied' "${cache_file}"; then
    cat "${cache_file}"
    return
  fi
  tmp_file=$(mktemp)
  for i in {1..5}; do
    curl --compressed -o "${tmp_file}" --connect-timeout 10 -s -x socks5h://127.0.0.1:9050 "$@" "${source}"
    if grep -qiF "$(
      printf '%s\n' \
        'access denied' \
        'Repository seems to be empty'
    )" "${tmp_file}"; then
      : >"${tmp_file}"
    fi
    if [ -s "${tmp_file}" ]; then
      break
    fi
  done
  if [ ! -s "${tmp_file}" ]; then
    curl --compressed -o "${tmp_file}" --connect-timeout 10 -s "$@" "${source}"
  fi
  cat "${tmp_file}"
  local trials
  if grep -qiF "$(
    printf '%s\n' \
      'access denied' \
      'Repository seems to be empty'
  )" "${tmp_file}"; then
    trials=-1
  else
    trials=5
    while [ ${trials} -gt 0 ] && \
      ! mv "${tmp_file}" "${cache_file}"; do
      sleep 1
      trials=$((trials-1))
    done
  fi
  if [ ${trials} -le 0 ]; then
    rm -f "${tmp_file}"
  fi
}

latest_version() {
  if [ "x$1" = 'xperl' ]; then
    local versions
    versions=$(cat)
    printf '%s\n' "${versions}" \
    | if printf '%s\n' "${versions}" \
      | grep -q '\..*\.'; then
      sort -V
    else
      sort -g
    fi
  else
    sort -V
  fi \
  | tail -n1
}

extract_sourceforge_file_list() {
  local verzeichnis
  verzeichnis="$1"
  curl_it "${verzeichnis}" \
  | sed -n '
    /^\s*<table id="files_list">\s*$/,/^\s*<\/table>\s*$/p
  ' \
  | sed -n '
    /^\s*<tbody>\s*$/,/^\s*<\/tbody>\s*$/p
  ' \
  | sed -n '
    /^\s*<th /,/^\s*<\/th>/ p
  ' \
  | sed '
    s@^.*<a href="\('"${verzeichnis%/${verzeichnis#*//*/}}"'\)\?/'"${verzeichnis#*//*/}"'\([^"]\+\)".*$@\2@
    t
    d
  '
}

me=$(readlink -f $0)
cd "$(dirname "${me}")"
versionenDatei="/var/cache/$(basename "$(dirname "${me}")")/lastVersions"
curl_cache="/var/cache/$(basename "$(dirname "${me}")")/curl-cache"
jobs=50
maschinenlesbar=false
force=false
unForce=false
archlinuxewe=true

eval set -- "$(
  getopt \
    -o fj:mn \
    --long 32 \
    --long force \
    --long jobs: \
    --long noUpdate \
    --long no-cache \
    -n "$(basename "$0")" \
    -- \
    "$@" \
    || echo "usage"
)"
args=("$@")
optArgs=()

use_cache=true

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
    ;;
    -n|--no-cache)
      use_cache=false
    ;;
    --)
      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}
[ ! -x "${versionenDatei%/*}" ] && versionenSchreiben=false
[ -r "${versionenDatei}" ] && [ ! -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=$?
    else
      /usr/src/archlinux32/devops/watch-versions | sed 's/$/ (arch32)/' | tee -a "${tmpFile}"
      ${me} "${args[@]}" $(echo *32/PKGBUILD | tr ' ' '\n' | sed 's|/PKGBUILD||') | tee -a "${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

  unset pkgbase
  unset pkgname
  unset pkgver
  if ${archlinuxewe}; then
    . $1/PKGBUILD
    srcKnown=false
  else
    eval "$(
      grep '^pkg\(base\|name\|ver\)=' $1/PKGBUILD
    )"
    remVer=$(
      for a in i486 i686 pentium4; do
        for r in core extra community testing community-testing staging community-staging; do
          curl -Ss 'https://mirror.archlinux32.org/'"${a}"'/'"${r}"'/'"${r}"'.db' \
          | bsdtar -Oxf - \
          | sed -n '
            /^%FILENAME%/ {
              N
              s/^%FILENAME%\n//
              /^'"${1%32}"'-[^-]\+-[^-]\+-any\.pkg\.tar\.\(xz\|zst\)$/ p
            }
          '
        done
      done \
      | sed '
        s/-[^-]\+-[^-]\+$//
        s/^.*-//
      ' \
      | latest_version
    )
    srcKnown=true
    source=()
  fi
  if [ -n "${pkgbase}" ]; then
    pkgname="${pkgbase}"
  fi

  for src in "${source[@]}" "${source_i686[@]}" "${source_x86_64[@]}"
  do
    src_name="${src%%::*}"
    src="${src#*::}"

    if echo "${src}" | \
      grep '^https://archive-server\.archlinux32\.org/' | 
      grep '[&?]t=git' | \
      grep '[&?]r=' | \
      grep -q '[&?]tag='; then
      remDir=$(
        printf '%s\n' "${src}" \
        | sed 's,^.*[?&]r=\([^&]\+\)\(\&.*\)\?$,\1,' \
        | sed 's/%3D/=/g'
      )
      remTag=$(
        printf '%s\n' "${src}" \
        | sed 's,^.*[?&]tag=\([^&]\+\)\(\&.*\)\?$,\1,' \
        | sed 's/%3D/=/g'
      )
      remVer=$(
        git -C "/usr/src/skripte/archive-server/work/repositories/git/${remDir}" tag \
        | sed '
          s/^[^0-9.*]*'"$(
            printf '%s\n' "$remTag" \
            | sed 's/[0-9.]\+$/\\([0-9.]\\+\\)/'
          )"'$/\1/
          t
          d
        ' \
        | latest_version
      )
    elif [ "${pkgname}" = 'local-certificates' ]; then
      remVer=$(
        curl_it 'https://eckner.net/certs/sha512sums' \
        | sed '
          s/^\S\+  \([0-9]\{4\}\)-\([0-9]\{2\}\)-\([0-9]\{2\}\)T\([0-9]\{2\}\):\([0-9]\{2\}\):\([0-9]\{2\}\)\.\S\+$/\1.\2.\3.\4.\5.\6/
          t
          d
        ' \
        | latest_version
      )
    elif [ "${pkgbase}" = 'bareos' ]; then
      remVer=$(
        curl_it 'https://github.com/bareos/bareos/releases' \
          | sed '
            s,^.* src="https://github.com/bareos/bareos/releases/expanded_assets/Release/\([0-9.]\+\)"\( [^>]*\)\?>.*$,\1,
            t
            d
          ' \
          | latest_version
      )
    elif [ "${pkgname}" = 'pacman-static' ]
    then
      git submodule update "${pkgname}"
      eval "$(
        sed -n '
          s/^pkgver=/remVer=/
          T
          p
        ' "${pkgname}/PKGBUILD"
      )"
    elif [ "${pkgname}" = 'otf-grundschrift' ]; then
      if curl_it 'https://fontlibrary.org/en/font/grundschrift' \
        | sed '
          s@^.*<a href="/assets/downloads/grundschrift/\([0-9a-f]\{32\}\)/grundschrift\.zip" .*$@\1@
          t
          d
        ' \
        | grep -qxF "${md5sums[0]}"; then
        remVer="${pkgver}"
      else
        remVer="${pkgver%.*}.$((${pkgver##*.}+1))"
      fi
    elif echo "${src}" | \
      grep -qwF 'https://registry.npmjs.org/@vue/cli/'; then
      remVer=$(
        curl_it "${src%-/*}" \
        | jq -r '.["dist-tags"]["latest"]'
      )
    elif echo "${src}" | \
      grep -qF '/ssacli-'; then
      centosVer=$(
        curl_it "${src%/*/*/*/*}/" | \
          tr '"' '\n' | \
          sed '
            s,^\([0-9]\+\)/$,\1,
            t
            d
          ' | \
          latest_version
      )
      remVer=$(
        curl_it "${src%/*/*/*/*}/${centosVer}/x86_64/current/" | \
          tr '"' '\n' | \
          sed '
            s,^ssacli-\([0-9.]\+\)-\([0-9.]\+\)\.x86_64\.rpm$,\1_\2,
            t
            d
          ' | \
          latest_version
      )
    elif [ "${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/Dropbox-desktop-client-builds/bd-p/101003016' | \
          tr '<>' '\n' | \
          sed '
            s/^\s*Stable Build \([0-9.-]\+\)\s*$/\1/
            t
            d
          ' | \
          latest_version
      )
    elif [ "${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|" | \
          latest_version
      )
    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|" | \
          latest_version
      )
    elif [ "${pkgname}" == "archiso32" ] || [ "${pkgname}" == 'archiso-dual' ]
    then
      git -C /usr/src/archlinux/archiso fetch upstream
      git -C /usr/src/archlinux32/archiso32 fetch origin
      remVer=$(
        {
          git -C /usr/src/archlinux/archiso tag
          git -C /usr/src/archlinux32/archiso32 tag
        } | \
          sed -n '
            s/^v//
            T
            p
          ' | \
          latest_version
      )
    elif [ "${pkgname}" == 'devtools32' ]
    then
      git -C /usr/src/archlinux/devtools fetch origin
      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.]\+$/p
            '
        ) | \
          latest_version
      )
    elif [ "${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
        } | \
          latest_version
      )
    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="\([0-9.]\+\)/"$,\1,
            T
            p
          ' | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q '//download\.virtualbox\.org/'
    then
      quVer=$(
        echo "${src}" | \
          sed 's|/[^/]\+/[^/]\+$||'
      )
      remVer=$(
        curl_it "${quVer}/" | \
          sed -n '
            s,^.*<a href="\([0-9.]\+\)/">.*$,\1,
            T
            p
          ' | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q "//raw\.githubusercontent\.com/qemu/qemu/"; then
      sum=$(
        curl -Ss "${src}" | \
          sha512sum - | \
          awk '{print $1}'
      )
      if printf '%s\n' "${sha512sums[@]}" | \
        grep -qxF "${sum}"; then
        remVer="${pkgver}"
      else
        remVer=$(
          date +%Y%m%d
        )
      fi
    elif echo "${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 "${aVers}" | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q '^git://anonscm\.debian\.org/\|^git\(+https\?\)\?://git\(hub\.com\|\.archlinux32\.org\)/.*#tag='
    then
      src="${src#git+}"
      src="${src%#*}"
      src="${src%?signed}"
      remVer=$(
        {
          git ls-remote --tags "${src}" 2>/dev/null || \
          git ls-remote --tags "${src//git.archlinux32.org\/archlinux32\//git2.archlinux32.org/archlinux32/}" 2>/dev/null
        } | \
          awk '{print $2}' | \
          sed '
            s|^refs/tags/'"$(
              if ! echo "${src}" | \
                grep -qF archlinux32; then
                printf 'v'
              fi
            )"'\([0-9.]\+\)$|\1|
            t
            d
          ' | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q '^git\(+[^:]\+\)\?://[^#]\+\(#commit=[^#]\+\)\?$'
    then
      remVer=$(
        cd "$1"
        makepkg --verifysource >/dev/null 2>&1
        git -C "${src_name}" fetch --all -p >/dev/null 2>&1
        _commit='HEAD'
        srcdir=$(pwd)
        pkgver
      )
    elif echo "${src}" | \
      grep -q '^svn\(+[^:]\+\)\?://[^#]\+\(#revision=[^#]\+\)\?$'
    then
      remVer=$(
        cd "$1"
        makepkg --verifysource >/dev/null 2>&1
        (
          cd "${src_name}"
          svn update >/dev/null
        )
        srcdir=$(pwd)
        pkgver
      )
    elif echo "${src}" | \
      grep -q "^https://pypi\.python\.org/packages/"
    then
      qu=$(
        echo "${src}" | \
          sed '
            s|^.*/packages/.*/\([^/]\+\)-[^/-]\+\.tar\.gz$|https://pypi.org/project/\1/|
            s|-[^-]\+\.linux/$|/|
          '
      )
      _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|" | \
          latest_version
      )
      remHash=$(
        curl_it "${qu}${remVer}/" | \
          tr '"#' '\n' | \
          sponge | \
          grep -m1 "^https://files\.pythonhosted\.org/packages/.*/[0-9a-f]\{60\}/${_pkgname}-${remVer}\(\.linux-x86_64\)\?\.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}" != "${locHash}" ] && \
        echo "sed_extra='s@${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|/$||' | \
          latest_version
      )
    elif echo "${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$,\1,
            T
            p
          ' | \
          latest_version
      )
    elif echo "${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|\.|\\\.|'
      )
      remVer=$( \
        curl_it "${quVer}" | \
          tr '"<>' '\n' | \
          grep "^${quNam}-v\?[0-9.-]*\.${quEnd}\$" | \
          sed "s|^${quNam}-v\?\([0-9.-]*\)\.${quEnd}\$|\1|" | \
          latest_version 'perl'
      )
    elif echo "${src}" \
    | grep -q '^ftp://ftp.freepascal.org/'; then
      quVer="${src%/*/*/*}/"
      remVer=$(
        curl_it "${quVer}" \
        | awk 'substr($1,1,1) == "d" {print $9}' \
        | sort -Vr \
        | while read -r ver; do
          curl_it "${quVer}/${ver}/source/" \
          | awk '{print $9}' \
          | sed '
            s@^fpcbuild-\([0-9.]\+\)\.tar\.gz$@\1@
            t
            d
          ' \
          | latest_version \
          | grep -F '' \
          && break
        done
      )
    elif echo "${src}" | \
      grep -q "ftp://"
    then
      quVer="${src%/*}/"
      quNam="${src##*/}"
      quEnd=$( \
        echo "${quNam}" |
          sed "s|^.*v\?[0-9.]*[0-9]\(.\)|\1|"
      )
      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\?\([0-9.]*\)${quEnd}\$|\1|" | \
          latest_version
      )
      [ "${pkgname}" == "pgplot" ] \
        && [ -n "${tmpVer}" ] \
        && remVer="${tmpVer:0:1}.${tmpVer:1:1}.${tmpVer:2}" \
        || remVer="${tmpVer}"
    elif echo "${src}" | \
      grep -q '//ftp\.gwdg\.de/\|//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\}\.${quEnd}\$|\1|" | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q '^https\?://github\.com/'
    then
      quVer=$(
        echo "${src#*::}" | \
          sed '
            s@/archive/\(Release/\|refs/tags/\)\?[^/]*$@/releases@
            s|/download/[^/]*/[^/]*$||
            s|http:|https:|
          '
      )
      quNam=$(
        echo "/${quVer#*.com/}/tag/" | \
          tr '[[:upper:]]' '[[:lower:]]'
      )
      if [ "${pkgname}" == 'boulder' ]; then
        us_chars='-'
        dot_chars=''
        ex_chars=''
      elif [ "${pkgname}" == 'jamulus-headless' ]; then
        us_chars=''
        dot_chars='_'
        ex_chars=''
      elif [ "${pkgname}" == 'hyperrogue' ]; then
        us_chars=''
        dot_chars=''
        ex_chars='[a-z]*'
      else
        us_chars=''
        dot_chars=''
        ex_chars=''
      fi
      remVer=$( \
        curl_it "${quVer}" | \
          tr '"' '\n' | \
          tr '[[:upper:]]' '[[:lower:]]' | \
          sed '
            s@^'"${quNam}"'\([rv]\|release\(%2f\|-\)\|\)\(['"${dot_chars}${us_chars}"'_0-9.]\+'"${ex_chars}"'\)$@\3@
            t
            d
          ' | \
          if [ -n "${dot_chars}" ]; then
            tr "${dot_chars}" '.'
          else
            cat
          fi | \
          if [ -n "${us_chars}" ]; then
            tr "${us_chars}" '_'
          else
            cat
          fi | \
          if [ "${pkgname}" == "conky-irc" ]; then
            grep -v '\.999$'
          elif [ "${pkgname}" == 'textmail' ]; then
            grep -vx '[0-9]\{8\}'
          else
            cat
          fi | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q "//\(\(pr\)\?downloads\.\)\?sourceforge\.net/code-snapshots/svn/"
    then
      quVer=$(
        echo "${src}" \
        | sed '
          s@^\([^/]\+//[^/]\+/\)code-snapshots/svn/\([^/]\)/\(\2[^/]\)\(/\3[^/]\+/[^/]\+\)/[^/]\+$@\1p\4/HEAD/@
        '
      )
      remVer=$(
        curl_it "${quVer}" \
        | sed '
          s@^.*>Commit <a href="[^"]\+">\[\([^][]\+\)]</a>.*$@\1@
          t
          d
        ' \
        | sort -V \
        | tail -n1
      )
    elif echo "${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/files/\1,
            t end
            s,^\([^/]\+\)/\(files/\)\?\([^/]\+\)/[0-9.]\+/[^/]\+$,\1/files/\3,
            t end
            s,^\([^/]\+\)/files/\1/\1-[0-9.]\+/[^/]\+$,\1/files/\1,
            t end
            s,^\([^/]\+\)/\(files/\)\?branch_[0-9.]\+/[^/]\+$,\1/files,
            t end
            s,^\([^/]\+\)/\(\1-[0-9.]\+\)/\2\.tar\.gz$,\1/files,
            t end
            s,^,unmatched sourceforge url: ,
            w /dev/stderr
            d
            :end
            s,/scidavis$,/SciDAVis,
            s,^.*$,https://sourceforge.net/projects/\0/,
          '
      )
      for ver in $(
        extract_sourceforge_file_list "${quVer}" \
        | sed '
          s@/$@@
          t
          d
        ' \
        | sed '
          s@^\(\('"${pkgname}"'\|'"${_pkgname}"'\)\([-.]\|%20\)\)\(.*\)@\0 \4@
          t
          s@^.*$@\0 \0@
        ' \
        | sort -k2Vr,2 \
        | if [ "${pkgname}" = 'qwt5' ]; then
          grep ' 5'
        else
          cat
        fi \
        | cut -d' ' -f1
      ); do
        remVer=$( \
          extract_sourceforge_file_list "${quVer}${ver}/" \
          | sed '
            s@/download$@@
            t
            d
          ' \
          | sed '
            s@^\(\('"${pkgname}"'\|'"${_pkgname}"'\)\([-.]\|%20\|\)\)\?\([0-9.][-0-9.]*\)\(-src\)\?\(\.tar\.\([xgl]z\|bz2\)\|\.tgz\|\.zip\|-win-dist\.msi\)$@\4@
            t
            d
          ' \
          | tr '-' '.' \
          | latest_version
        )
        if [ -n "${remVer}" ]; then
          break
        fi
      done
    elif echo "${src}" | \
      grep -q '//support\.hdfgroup\.org/'
    then
      quVer="${src%/*/*/*}/"
      quNam="${src##*/}"
      quNam="${quNam%-*}"
      quNAM="${src#${quVer}}"
      quNAM="${quNAM%%.*}"
      quNAM=$(echo "${quNAM}" | tr '[:lower:]' '[:upper:]')
      remVer=$(
        curl_it "${quVer}" \
        | tr '"' '\n' \
        | sed "
          s|^${quNAM}\.\(.*\)/\$|\1|
          t
          d
        " \
        | sort -Vr \
        | while read -r verKandidat; do
          curl_it "${quVer}${quNAM}.${verKandidat}/src/" \
          | sed '
            s@^.*<a href="'"${quNam}"'-'"${pkgname#${quNam}}"'\.\([0-9.]\+\)\.tar\.gz">.*$@\1@
            t
            d
          ' \
          | sort -Vr \
          | grep -Fm1 '' \
          && break
        done
      )
    elif echo "${src}" | \
      grep -q 'https://bitbucket\.org/.*/get/[^/]\+$'
    then
      srcPreNam=$(
        echo "${src}" | \
          sed 's|^.*/\([^/0-9]\+[-_]\)[0-9][^/]\+$|\1|'
      )
      srcEndg=$(
        echo "${src}" | \
          sed '
            s|^.*\(\.tar[^/]*\)$|\1|
            s|\.|\\.|g
          '
      )
      remVer=$(
        curl_it "${src%/get/*}/downloads/?tab=tags" | \
          tr '"' '\n' | \
          sed '
            s|^.*/'"${srcPreNam}"'\(.*\)'"${srcEndg}"'$|\1|
            t
            d
          ' | \
          tr -- '-_' '.' | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q '^https\?://lilypond\.org/'
    then
      if echo "${src}" \
      | grep -q '/v\?\([^/]\+\)/[^/]\+-\1[^/]\+$'; then
        quVers=$(
          curl_it "${src%/*/*}/" \
          | sed '
            s@^.*<a href="\(v[0-9.]\+\)/">\1/</a>.*$@\1/@
            t
            d
          ' \
          | sort -Vr \
          | sed 's@^@'"${src%/*/*}/"'@'
        )
      else
        quVers="${src%/*}/"
      fi
      for quVer in ${quVers}; do
        remVer=$(
          curl_it "${quVer}" \
          | tr '"<>' '\n' \
          | sed '
            s@^lilypond-\([0-9.]\+\)\(-[0-9]\+\.documentation\)\?\.t\(ar\(\.[gx]z\|\.bz2\)\?\|gz\)$@\1@
            t
            d
          ' \
          | tr '_' '.' \
          | latest_version
        )
        if [ -n "${remVer}" ]; then
          break
        fi
      done
    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/\|' \
          'archlinuxarm\.org' \
          'arch\.eckner\.net' \
          'bitbucket\.org' \
          'bindfs\.org' \
          'dist\.schmorp\.de' \
          'dl\.suckless\.org' \
          'download\.osgeo\.org' \
          'download\.qemu\.org' \
          'downloads\.powerdns\.com' \
          'ftp\.daper\.net' \
          'ftp\.pcre\.org' \
          'isl\.gforge\.inria\.fr' \
          'www\.lcdf\.org' \
          'www\.vanheusden\.com'\
          'packages\.microsoft\.com' \
          'people\.gnome\.org' \
          'pkgbuild\.com' \
          'qgis\.org' \
          'ftp\.recompile\.se' \
          'software\.is\.never\.null' \
          'sources\.archlinux\(32\)\?\.org' \
          'webhome\.phy\.duke\.edu' \
          'www\.charlesproxy\.com' \
          'www\.dragonsdawn\.net' \
          'www\.gaia-gis\.it' \
          'www\.hashcash\.org' \
          'www\.iozone\.org' \
          'www\.tana\.it' \
          'www\.tinc-vpn\.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
      pkgname="${pkgname%-static}"
      case "${pkgname}" in
        'qemu-user')
          pkgname='qemu'
        ;;
        'netkit-bsd-finger')
          pkgname='bsd-finger'
        ;;
        'charles')
          pkgname='charles-proxy'
        ;;
      esac
      quVer="${src%/*}/"
      if printf '%s\n' "${pkgver}" \
      | grep -qx '[0-9.]\+_[0-9.]\+_rc[0-9]\+'; then
        ist_rc=true
        ver_match='[0-9._]\+[a-z]\?\(-rc[0-9]\+\)\?'
      elif printf '%s\n' "${pkgver}" \
      | grep -qx '[0-9.]\+_[0-9.]\+pre[0-9]\+'; then
        ist_rc=true
        ver_match='[0-9.]\+\(\.[0-9]\+pre[0-9]\+\)\?'
      else
        ist_rc=false
        ver_match='[0-9._]\+[a-z]\?'
      fi
      if [ "${pkgname}" = 'spatialite-tools' ]; then
        ver_match=$(
          bsdtar -tf /var/lib/pacman/sync/community.db \
          | grep -x 'libspatialite-.*-.*/desc' \
          | xargs -r bsdtar -Oxf /var/lib/pacman/sync/community.db \
          | sed -n '
            /^%VERSION%/ {
              N
              s/^%VERSION%\n\([0-9]\+\.\).*$/\1/
              T
              p
            }
          '
        )"${ver_match}"
      fi
      remVer=$( \
        curl_it "${quVer}" | \
          tr '"<>' '\n\n\n' | \
          sed '
            s@^'"${pkgname#python2-}"'\(-src\)\?[-_]\?v\?\('"${ver_match}"'\)\(_amd64\.deb\|\(\.orig\)\?\.t\(ar\(\.[gx]z\|\.bz2\)\?\|gz\)\)$@\2@
            t
            d
          ' | \
          tr '_' '.' | \
          sed '
            s/^\(\S\+\)-\(rc[0-9]\+\)$/'"${pkgver%%_*}"'_\1_\2/
            s/^\(\S\+pre\S\+\)$/'"${pkgver%_*pre*}"'_\0/
          ' | \
          latest_version
      )
    elif echo "${src}" | \
      grep -qF "$(
        printf '%s\n' \
          'https://www.kernel.org/pub/linux/utils/cryptsetup' \
          'https://archive.apache.org/' \
          'http://ftp.gnome.org/pub/gnome/sources/glib/'
        )"; then
      fileName=$(
        printf '%s\n' "${src}" \
        | sed '
          s@^.*/@@
          s@-[0-9.]\+[^0-9]\+$@@
        '
      )
      for mainVer in $(
        curl_it -L "${src%/*/*}/" \
        | sed '
          s@^.*<a href="\(\(v\|'"${fileName}"'-\)\?[0-9.]\+\)/"\( [^>]\+\)\?>\1/</a>.*$@\1@
          t
          d
        ' \
        | sort -Vr
      ); do
        remVer=$(
          curl_it -L "${src%/*/*}/${mainVer}/" \
          | sed '
            s@^.*<a href="\('"${fileName}"'-\([0-9.]\+\)\.t\(ar\.\)\?\(gz\|bz2\|xz\)\)"\( [^>]\+\)\?>\1</a>.*$@\2@
            t
            d
          ' \
          | latest_version
        )
        if [ -n "${remVer}" ]; then
          break
        fi
      done
    elif echo "${src}" | \
      grep -q "https://www\.mkgmap\.org\.uk/download"
    then
      remUrl=$(
        echo "${src}" | \
          sed 's|-r[0-9]\+\.zip$|.html|'
      )
      remVer=r$(
        curl_it "${remUrl}" \
        | sed '
          s@^.*"text: current()\.version">\([0-9]\+\)<.*$@\1@
          t
          d
        ' \
        | latest_version
      )
    elif echo "${src}" | \
      grep -q '//www\.apache\.org/dist/spamassassin/source/'
    then
      remVer=$(
        curl_it 'https://spamassassin.apache.org/downloads.cgi' | \
          tr '"' '\n' | \
          sed '
            s,^.*/Mail-SpamAssassin-\([0-9.]\+\)\.tar\.gz$,\1,
            t
            d
          ' | \
          latest_version
      )
    elif echo "${src}" | \
      grep -q '//zircon\.org\.uk/topal/'
    then
      remVer=$(
        curl_it "${src%/*/*}/" | \
          sed '
            s,^.*<a href="\(rel-\([0-9.]\+\)\)">\1</a>.*$,\2,
            t
            d
          ' | \
          latest_version
      )
    elif echo "${src}" \
    | grep -q 'https://download\.qt\.io/archive/qt/'; then
      for major in $(
        curl_it 'https://download.qt.io/archive/qt/' \
        | sed -n '
          s@^.*<a href="\([0-9.]\+/\)">\1</a>.*$@\1@
          T
          s@/$@@
          /^'"${pkgname#qt}"'/ p
        ' \
        | sort -rV
      ); do
        remVer=$(
          curl_it 'https://download.qt.io/archive/qt/'"${major}"'/' \
          | sed -n '
            s@^.*<a href="\([0-9.]\+/\)">\1</a>.*$@\1@
            T
            s@/$@@
            p
          ' \
          | sort -V \
          | tail -n1
        )
        if [ -n "${remVer}" ]; then
          break;
        fi
      done
    elif echo "${src}" \
    | grep -q 'https://www\.quinapalus\.com/'; then
      remVer=$(
        curl_it 'https://www.quinapalus.com/qxwdownload.html' \
        | sed '
          s@^<h2>Release \([0-9]\+\)</h2>$@\1@
          t
          d
        ' \
        | sort -V \
        | tail -n1
      )
    elif echo "${src}" \
    | grep -q '//zoom\.us/client/'; then
      remVer=$(
        curl_it 'https://zoom.us/download' --user-agent 'Mozilla/5.0 (X11; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0' \
        | sed '
          s@^.*<span class="linux-ver-text"[^>]*>Version \([0-9.]\+\) (\([0-9.]\+\))</span>.*$@\1.\2@
          t
          d
        '
      )
    elif echo "${src}" \
    | grep -q '//downloads\.slack-edge\.com/'; then
      remVer=$(
        curl_it 'https://slack.com/downloads/linux' \
        | sed '
          s@^.*>Version \([0-9.]\+\)</span>.*$@\1@
          t
          d
        '
      )
    else
      continue
    fi
    srcKnown=true
    break
  done

  if [ -z "${source[*]}${source_i686[*]}${source_x86_64[*]}" ]; then
    srcKnown=true
    if declare -f pkgver >/dev/null; then
      remVer=$(pkgver)
    else
      remVer="${pkgver}"
    fi
  fi

  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