#!/bin/sh -
#
# To use this filter with less, define LESSOPEN:
# export LESSOPEN="|/usr/bin/lesspipe.sh %s"

# Helper function to list contents of ISO files (CD images)
iso_list() {
   isoinfo -d -i "$1"
   isoinfo -d -i "$1" | grep -q ^Rock\.Ridge && iiopts="$iiopts -R"
   isoinfo -d -i "$1" | grep -q ^Joliet && iiopts="$iiopts -J"
   echo
   isoinfo -f $iiopts -i "$1"
}

lesspipe() {
   case `echo "$1" | tr '[:upper:]' '[:lower:]'` in
      *.[1-9n]|*.man|*.[1-9n].bz2|*.man.bz2|*.[1-9].gz|*.[1-9]x.gz|*.man.gz|*.[1-9].xz|*.[1-9]x.xz|*.man.xz)
      case `echo "$1" | tr '[:upper:]' '[:lower:]'` in
         *.gz)  DECOMPRESSOR="gunzip -c" ;;
         *.bz2) DECOMPRESSOR="bunzip2 -c" ;;
         *.xz)  DECOMPRESSOR="unxz -c" ;;
         *)     DECOMPRESSOR="cat" ;;
      esac
      if $DECOMPRESSOR -- "$1" | file - | grep -q troff; then
         if echo "$1" | grep -q ^/; then   #absolute path
            man -- "$1" | cat -s
         else
            man -- "./$1" | cat -s
         fi
      else
         $DECOMPRESSOR -- "$1"
      fi
   ;;

   *.tar.gz|*.tgz|*.tar.z|*.tar.dz)
      tar tzvf "$1" ;;

   *.tar.xz)
      tar Jtvvf "$1" ;;

   *.xz)
      if [ -x "`which xz`" ]; then xz -dc -- "$1"
      else echo "No xz available"; fi ;;

   *.tar.bz2|*.tbz2)
      if [ -x "`which bunzip2`" ]; then bunzip2 -dc "$1" | tar tvvf -
      else echo "No bunzip2 available"; fi ;;

   *.bin|*.raw)
      if [ -x "`which isoinfo`" ]; then
         file "$1" | grep -q ISO\.9660 && iso_list "$1"
      else
         echo "No isoinfo available"
         echo "Install mkisofs to view ISO images"
      fi ;;

   *.bz2)
      if [ -x "`which bunzip2`" ]; then bunzip2 -dc "$1"
      else echo "No bunzip2 available"; fi ;;

   *.cpi|*.cpio)
      cpio -itv < "$1" ;;

   *.gz|*.z|*.dz)
      gzip -dc "$1" ;;

   *.gif|*.jpeg|*.jpg|*.pcd|*.png|*.tga|*.tiff|*.tif)
      if [ -x "`which identify`" ]; then
         identify "$1"
      else
         echo "No identify available"
         echo "Install ImageMagick to browse images"
      fi ;;

   *.iso)
      if [ -x "`which isoinfo`" ]; then iso_list "$1"
      else
         echo "No isoinfo available"
         echo "Install cdrtools to view ISO images"
      fi ;;

   *.lha|*.lzh)
      if [ -x "`which lha`" ]; then lha v "$1"
      else echo "No lha available"; fi ;;

   *.pdf)
      if [ -x "`which pdftotext`" ]; then pdftotext "$1" -
      else echo "No pdftotext available"; fi ;;

   *.rar|*.r[0-9][0-9])
      if [ -x "`which unrar`" ]; then unrar v "$1"
      else echo "No rar or unrar available"; fi ;;

   *.rpm)
      if [ -x "`which rpm`" ]; then
         echo "$1:"; rpm -q -i -p "$1"
         echo
         echo '*** Contents:'
         rpm -qlp "$1"
      else
         echo "rpm isn't available, no query on rpm package possible"
      fi ;;

   *.tar)
      tar tvvf "$1" ;;

   *.jar|*.war|*.ear|*.xpi)
      if [ -x "`which unzip`" ]; then unzip -v "$1";
      else echo "No unzip available"; fi ;;

   *.zip)
       zipinfo -- "$1" ;;

   esac
}

if [ -d "$1" ] ; then
   /bin/ls -alF -- "$1"
else
   # Allow for user defined filters
   if [ -x ~/.lessfilter ]; then
      ~/.lessfilter "$1"
      exit 0
   else
      lesspipe "$1" 2>/dev/null
   fi
fi