#!/bin/bash

me="$(readlink -f $0)"
cd $(dirname ${me})

if [ $# -eq 0 ]
then
  ${me} $(echo */PKGBUILD | tr " " "\n" | sed "s|/PKGBUILD||")
  exit $?
elif [ $# -eq 1 ]
then
  . $1/PKGBUILD

  srcKnown=false

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

    if echo "${src}" | \
      grep -q "//opensources\.eckner\.net/"
    then
      qu=${src#*::}
      qu=${qu%-*}
      remVer=$( \
        curl -o - "$(\
          echo "${qu}" | \
            sed "s|\?dl=|?ls=|" \
          )" 2> /dev/null | \
          tr "<>" "\n\n" | \
          grep "^${pkgname}-" | \
          sed "s|^${pkgname}-||" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//search\.m\?cpan\.org/CPAN/authors/\|//cpan\.metacpan\.org/authors/"
    then
      quVer=$( \
        echo "${src%/*}" | \
          sed "s#//search\.m\?cpan\.org/CPAN/\|//cpan.metacpan.org/#//www.cpan.org/#" | \
          sed "s|^https:|http:|" | \
          sed "s|\([^/]\)\$|\1/|"
      )
      quNam=${src##*/}
      quNam=${quNam%-*}
      quEnd=$( \
        echo "${src##*-}" |
          sed "s|^v\?[0-9.]*||"
      )
      remVer=$( \
        curl -o - "${quVer}" 2> /dev/null | \
          tr "\"" "\n" | \
          grep "^${quNam}-v\?[0-9.-]*\.${quEnd}\$" | \
          sed "s|^${quNam}-v\?\(.*\)\.${quEnd}\$|\1|" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//cpan\.org/"
    then
      quVer=$( \
        echo "${src%/*}/" | \
          sed "s|//cpan|//www.cpan|"
      )
      quNam=${src##*/}
      quNam=${quNam%-*}
      quEnd=$( \
        echo "${src##*-}" |
          sed "s|^v\?[0-9.]*||"
      )
      remVer=$( \
        curl -o - "${quVer}" 2> /dev/null | \
          tr "\"" "\n" | \
          grep "^${quNam}-v\?[0-9.-]*\.${quEnd}\$" | \
          sed "s|^${quNam}-v\?\(.*\)\.${quEnd}\$|\1|" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${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 -o - "${quVer}" 2> /dev/null | \
          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 "${src}" | \
      grep -q "//arch\.eckner\.net/"
    then
      quVer="${src%/*}"
      quVer="${quVer#*::}"
      quNam=${src##*/}
      quNam=${quNam%-*}
      quNam=${quNam%-*}
      quNam=${quNam%-*}
      quEnd=${src##*-}
      quEnd=${quEnd#*.}
      remVer=$( \
        curl -o - "${quVer}/" 2> /dev/null | \
          tr "\"" "\n" | \
          grep "^${quNam}\(-[^-]*\)\{3\}\.${quEnd}\$" | \
          sed "s|^${quNam}-\([^-]*\)\(-[^-]*\)\{2\}\.${quEnd}\$|\1|" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//github.com/"
    then
      quVer=$(
        echo "${src#*::}" | \
          sed "s|/archive/[^/]*\$|/releases|"
      )
      quNam=/${quVer#*.com/}/tag/
      remVer=$( \
        curl -o - "${quVer}" 2> /dev/null | \
          tr "\"" "\n" | \
          grep "^${quNam}" | \
          sed "s|^${quNam}||" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//downloads\.sourceforge\.net/sourceforge/"
    then
      quVer=$( \
        echo "${src}" | \
          sed "s|//downloads\.sourceforge\.net/sourceforge/\([^/]*\)/[^/]*\$|//sourceforge.net/projects/\1/files/\1/|" | \
          sed "s|^http:|https:|"
      )
      remVer=$( \
        curl -o - "${quVer}" 2> /dev/null | \
          tr "\"" "\n" | \
          grep "^${quVer#*sourceforge.net}[0-9.-]" | \
          sed "s|^${quVer#*sourceforge.net}\([0-9.-]\+\).*\$|\1|" | \
          sed "s|-\$||" | \
          sort -V | \
          tail -n1 \
      )
    elif echo "${src}" | \
      grep -q "//www\.hdfgroup\.org/"
    then
      quVer="${src%/*}/"
      quNam="${src##*/}"
      quNam="${quNam%-*}"
      quEnd=$( \
        echo "${src}" | \
          sed "s|^.*[0-9]||"
      )
      mainVer=${pkgname#hdf}
      remVer=$( \
        curl -o - "${quVer}" 2> /dev/null | \
          tr "\"" "\n" | \
          grep "^${quNam}-${mainVer}\.\(.*\)${quEnd}\$" | \
          sed "s|^${quNam}-${mainVer}\.\(.*\)${quEnd}\$|\1|" \
      )
    elif [ "${pkgname}" == "openttd-svn" ]
    then
      remVer=$( \
        eval $(grep "^\s*svn " $1/PKGBUILD | \
          sed "s|export|log|; s|\s*trunk\$||") | \
          grep -v "^-.* WebTranslator " | \
          grep -v "^-.* Eints:" | \
          grep "^-[^-]" -B10 -m1 | \
          grep "^r" | \
          tail -n1 | \
          sed "s|^r\([[:digit:]]\+\)\s.*\$|\1|" \
        )
    else
      continue
    fi
    srcKnown=true
    break
  done

  if ! ${srcKnown}
  then
    echo "Unknown src: '${source[@]}'"
    exit 1
  fi

  if [ ! "${pkgver}" == "${remVer}" ]
  then
    echo "${pkgname} ist neuer verfügbar: ${remVer} vs. ${pkgver}"
  fi

else
  echo $* | \
    tr " " "\n" | \
    parallel -j0 $0 {} \;
  exit $?
fi