横書きのepubファイルを縦書きに変更するスクリプト

epubVertical.sh

#!/usr/bin/env sh

if [ $# -ne 1 ]; then
  echo "need epub file!" 1>&2
  echo "example:" 1>&2
  echo "    $ $0 ebook.epub" 1>&2
  exit 1
fi

FILE=`basename "$1" .epub`
DIR=/tmp/$FILE.vertical

mkdir "$DIR"

unzip "$1" -d "$DIR"

echo '@charset "utf-8";
* {
    line-height: 150%;
}

.vertical,.vrtl {
    writing-mode: vertical-rl;
    -epub-writing-mode: vertical-rl;
    -webkit-writing-mode: vertical-rl;
    line-break: normal;
    -epub-line-break: normal;
    -webkit-line-break: normal;
}

p{
    margin: 0;
}

h2{
    margin-left:3rem;
    margin-top:3rem;
}' >> "$DIR/page_styles.css"

OUT=`pwd`"/$FILE.vertical.epub"

cd "$DIR"

zip -0 -X "$OUT" mimetype
zip -r "$OUT" * -x mimetype

cd /tmp
rm -rf "$DIR"

Thank you for the script! It still works!