zip2cbz.sh

#!/bin/bash -ex
# zip2cbz.sh
# Written by Takashi UNO
# require: zip, ImageMagick

# if [ $# -ne 1 ]; then
# 	echo "USAGE: $(basename $0) hogehoge.zip"
# 	exit 1
# fi

OPTIPNGOPTIONS="-quiet"
SIZE="600x800"
CWD="$(pwd)"

for cmd in zip unzip unrar convert; do
	if [ ! -x "$(which $cmd)" ]; then
		echo "command $cmd is not found."
		exit 1
	fi
done

if [ ! -f "$1" ]; then
	echo "$1: file not exist."
	exit 1
fi

file=$1

if [[ "$file" =~ \ |\' ]]; then
	newname=${file//[^0-9A-Za-z_.]/_}
	echo "newname $newname"
	if [ ! -e "$newname" ]; then
		cp "$file" "$newname"
	fi
	file=$newname
fi
echo "file: $file"

if [[ ${file: -3} == "cbz" ]]; then
	mv "$file" "$(basename "$file" .cbz).zip"
	file="$(basename "$file" .cbz).zip"
elif [[ ${file: -3} == "cbr" ]]; then
	mv "$file" "$(basename "$file" .cbr).rar"
	file="$(basename "$file" .cbr).rar"
fi
echo "file: $file"

if [[ ${file: -3} == "zip" ]]; then
	TMPDIR="$CWD/tmp/$(basename "$file" .zip)"
elif [[ ${file: -3} == "rar" ]]; then
	TMPDIR="$CWD/tmp/$(basename "$file" .rar)"
fi
echo "tmpdir ${TMPDIR}"

#trap 'rm -rf "${TMPDIR}"' EXIT
mkdir -p "${TMPDIR}/unzip"
mkdir "${TMPDIR}/png"
if [[ ${file: -3} == "zip" ]]; then
	unzip -q "$file" -d "${TMPDIR}/unzip"
elif [[ ${file: -3} == "rar" ]]; then
	unrar x "$file" "${TMPDIR}/unzip"
else
	exit 3
fi

pushd "${TMPDIR}/unzip" >/dev/null

SAVEIFS=IFS
IFS=$(echo -en "\n\b")
array=($(find . -depth -type d)) # Find catalogs recursively.
pattern=" |'"
for i in "${array[@]}"; do
	pushd "$i" >/dev/null 2>&1
	for name in *; do
		if [[ "$name" =~ $pattern ]]; then
			newname_inside=${name//[^0-9A-Za-z_.]/_}
			if [ ! -e "$newname_inside" ]; then
				mv "$name" "$newname_inside"
			fi
		fi
	done
	popd >/dev/null 2>&1
done
IFS=$SAVEIFS

SAVEIFS=IFS
IFS=$(echo -en "\n\b")
array=($(find . -type d -printf "%P\n")) # Find catalogs recursively.
for i in "${array[@]}"; do
	mkdir -p "${TMPDIR}/png/$i"
done
IFS=$SAVEIFS

# if [ ! -x "$(which parallel)" ]; then
	find . -name "*.jpg" -printf "%P\n" | while read -r src; do
		echo "$src"
		convert "$src" -type grayscale -fuzz 50% png:- | convert - -depth 4 -resize $SIZE "${TMPDIR}/png/${src%.jpg}.png" && optipng ${OPTIPNGOPTIONS} "${TMPDIR}/png/${src%.jpg}.png"
	done
# else
# 	find . -name "*.jpg" -printf "%P\n" | while read -r src; do
# 		echo "$src"
# 		parallel -j4 "convert $src -type grayscale -fuzz 50% png:- | convert - -depth 4 -resize $SIZE ${TMPDIR}/png/${src%.jpg}.png && optipng ${OPTIPNGOPTIONS} ${TMPDIR}/png/${src%.jpg}.png"
# 	done
# fi
popd >/dev/null
if [[ ${file: -3} == "zip" ]]; then
	zip -qr "${file%.zip}_kobo.cbz" "${TMPDIR}/png"
elif [[ ${file: -3} == "rar" ]]; then
	zip -qr "${file%.rar}_kobo.cbz" "${TMPDIR}/png"
fi
echo "$file"