#!/bin/bash

remote_directory="ftp://ftp.archlinux.org/other/texlive/"
local_directory=${PWD}
page="/tmp/texlive-update"
pkgs="bibtexextra bin core fontsextra htmlxml latexextra"

wget -O ${page} ${remote_directory} &>/dev/null

page_data=$(cat ${page})


for pkg in ${pkgs} ; do
  echo " :: scanning ${pkg}.."

  unset found_pkg

  for x in {1..250} ; do
    if [ "${found_pkg}" == "true" ] ; then
      break
    fi

    pkg_match_line=$(echo ${page_data} | cut -d\" -f${x})
    pkg_match_file=$(echo ${pkg_match_line} | grep texlive-${pkg})
    if [ -n "${pkg_match_file}" ] ; then
      if [ "${pkg}" == "bin" ] ; then
        #-source
          local_revision=$(cat ${local_directory}/texlive-${pkg}/PKGBUILD | grep texlive-${pkg}-source | cut -d- -f4 | cut -d. -f1)
          if [ -n "$(echo ${pkg_match_file} | grep href | grep source)" ] ; then
            remote_revision=$(echo ${pkg_match_file} | cut -d- -f4 | cut -d. -f1)
            ver=$(vercmp ${local_revision} ${remote_revision})
            if [ "${ver}" == "-1" ] ; then
              echo " :: !! new texlive-bin-source tarball found"
              echo "   -- local: ${local_revision}"
              echo "   -- remote: ${remote_revision}"
              sed -i -e "s/${local_revision}/${remote_revision}/g" ${local_directory}/texlive-${pkg}/PKGBUILD
            fi
          fi
        #-texmf
          local_revision=$(cat ${local_directory}/texlive-${pkg}/PKGBUILD | grep texlive-${pkg}-texmf | cut -d- -f4 | cut -d. -f1)
          if [ -n "$(echo ${pkg_match_file} | grep href | grep texmf)" ] ; then   
            remote_revision=$(echo ${pkg_match_file} | cut -d- -f4 | cut -d. -f1)
            ver=$(vercmp ${local_revision} ${remote_revision})
            if [ "${ver}" == "-1" ] ; then
              echo " :: !! new texlive-bin-texmf tarball found"
              echo "   -- local: ${local_revision}"
              echo "   -- remote: ${remote_revision}"
              sed -i -e "s/${local_revision}/${remote_revision}/g" ${local_directory}/texlive-${pkg}/PKGBUILD
            fi
          fi
        #luatext
          if [ "${found_luatext}" == "true" ] ; then
            continue
          fi

          local_revision=$(cat ${local_directory}/texlive-${pkg}/PKGBUILD | grep "luatex-svn" | cut -d- -f2 | cut -d. -f1 | cut -dn -f2)
          remote_revision=$(echo ${page_data} | sed -e 's/\n//g' -e 's/xz/xz\n/g' -e 's/zip/zip\n/g' -e 's/a>/a>\n/g' -e 's/ref=/ref=\n/g' | grep luatex | cut -d. -f1 | cut -dn -f2 | sed -e 's/ /\n/g' | uniq | grep -v ftp)
          for match in ${remote_revision} ; do
            ver=$(vercmp ${local_revision} ${match})
            if [ "${ver}" == "-1" ] ; then
              echo " :: !! new luatext tarball found"
              echo "   -- local: ${local_revision}"
              echo "   -- remote: ${match}"
              sed -i -e "s/${local_revision}/${match}/g" ${local_directory}/texlive-${pkg}/PKGBUILD
              found_luatext="true"
            fi
          done
        fi
    elif [ "${pkg}" == "bibtexextra" ] ; then
      if [ "${found_match}" == "true" ] ; then
        continue
      fi

      local_revision=$(cat ${local_directory}/texlive-${pkg}/PKGBUILD | grep pkgver= | cut -d= -f2 | cut -d. -f2)
      remote_revision=$(echo ${page_data} | sed -e 's/\n//g' -e 's/xz/xz\n/g' -e 's/zip/zip\n/g' -e 's/a>/a>\n/g' -e 's/ref=/ref=\n/g' | grep ${pkg} | cut -d. -f2 | cut -d- -f1 | uniq | grep -v ftp)
      for match in ${remote_revision} ; do
        ver=$(vercmp ${local_revision} ${match})
        if [ "${ver}" == "-1" ] ; then
          echo " :: !! new tarball found"
          echo "   -- local: ${local_revision}"
          echo "   -- remote: ${match}"
          sed -i -e "s/${local_revision}/${match}/g" ${local_directory}/texlive-${pkg}/PKGBUILD
          found_match="true"
        fi
      done
    else
      if [ "${found_pkg}" == "true" ] ; then
        break
      fi

      local_revision=$(cat ${local_directory}/texlive-${pkg}/PKGBUILD | grep pkgver= | cut -d= -f2 | cut -d. -f2)
      remote_revision=$(echo ${page_data} | sed -e 's/\n//g' -e 's/xz/xz\n/g' -e 's/zip/zip\n/g' -e 's/a>/a>\n/g' -e 's/ref=/ref=\n/g' | grep ${pkg} | cut -d. -f2 | cut -d- -f1 | uniq | grep -v ftp)
      for match in ${remote_revision} ; do
        ver=$(vercmp ${local_revision} ${match})
        if [ "${ver}" == "-1" ] ; then
          echo " :: !! new tarball found"
          echo "   -- local: ${local_revision}"
          echo "   -- remote: ${match}"
          sed -i -e "s/${local_revision}/${match}/g" ${local_directory}/texlive-${pkg}/PKGBUILD
          found_pkg="true"
        fi
      done
    fi
  done
done