A simple converter for css in EPUB which covert 100vw/100vh to 100%

batch_convert.sh

#!/bin/bash
# For batch convertion:

find *.epub | xargs -I FILE ./convert.sh FILE

convert.sh

#!/bin/bash

usage() {
	echo "Usage: ./convert.sh FILE.epub"
	echo "Will save new EPUB under output/FILE.epub"
	exit 1
}

# Params check
if [ $# != 1 ]; then
	usage
fi

FILE=$1
if [ ! -f "$FILE" ]; then
	usage
fi

# Clear ./tmp/
if [ -d tmp ]; then
	rm -r tmp
fi

mkdir tmp
cd tmp

# Unzip EPUB
unzip -q "../$FILE"

if [ -d OEBPS/Styles ]; then
	cd OEBPS/Styles
else
	exit 1
fi

# For check
echo "========== Match: 100vw =========="
grep "100vw" *.css
echo "========== Match: 100vh =========="
grep "100vh" *.css
echo "=================================="

# Change 100vw/100vh -> 100%
sed "s/100vw/100\%/g" -i *.css
sed "s/100vh/100\%/g" -i *.css

cd ../..

# Pack new EPUB files
if [ ! -d "../output" ]; then
	mkdir ../output
fi

zip -qr "../output/$FILE" *

# Clean tmp/
cd ..
rm -r tmp