if [ -z "`type -t $ZIP_PATH`" ]
then
  echo >&2 "Missing zip utility at $ZIP_PATH, conversion to epub not possible."
  echo >&2 "Exiting !"
  exit 3
fi

case "$1" in
  stylesheet)
   if [ "$VERBOSE" -ge 1 ]
    then
      echo >&2 "Converting Docbook to epub"
    fi
    echo "http://docbook.sourceforge.net/release/xsl/current/epub/docbook.xsl"
  ;;
  post-process)
  if [ "$VERBOSE" -ge 1 ]
    then
    echo >&2 "Creating epub file"
  fi
  INPUT_DIR=`dirname $INPUT_FILE`
  CSS_DEST_DIR=$PWD/OEBPS
  mkdir $PWD/OEBPS
  USED_CSS_LIST=`${GREP_PATH} 'link rel="stylesheet"' $CSS_DEST_DIR/*.html | ${SED_PATH} -e's/.*<link rel="stylesheet" type="text\/css" href="\(.*\.css\)"\/>.*/\1/' | uniq`
  for CSS_SOURCE in $USED_CSS_LIST
  do
    ${GCP_PATH:-cp} -R -P -p -- $INPUT_DIR/$CSS_SOURCE $CSS_DEST_DIR/
  done
  echo -n "application/epub+zip" > mimetype
  EPUB_NAME=$(basename "${XSLT_PROCESSED%.*}").epub
  [ -e "$XSLT_PROCESSED" ] && rm "$XSLT_PROCESSED"
  ${ZIP_PATH} -0Xq $EPUB_NAME mimetype
  ${ZIP_PATH} -Xr9D $EPUB_NAME *
  ${GCP_PATH:-cp} -R -P -p -- $EPUB_NAME "$OUTPUT_DIR" 2>/dev/null
  ;;
esac