Convert cbr to cbz (comic book archives)

cbr2cbz.zsh

#            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
#                    Version 2, December 2004
#
# Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
#
# Everyone is permitted to copy and distribute verbatim or modified
# copies of this license document, and changing it is allowed as long
# as the name is changed.
#
#            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
#   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
#
#  0. You just DO WHAT THE FUCK YOU WANT TO.

# depends on p7zip (7z command) with rar support
# should be compatible with bash (tested on zsh)
# for batch call:
# find -name '*.cbr' -print -exec zsh -c 'source ~/.zshrc;cbr2cbz "{}"' \;

function cbr2cbz() {
	TMP="$XDG_RUNTIME_DIR"
	CBZ=$(basename "$1" .cbr).cbz
	DN=$(dirname "$1")
	if [ -f "$DN/$CBZ" ]; then
		echo "$DN/$CBZ already exists"
	else
		echo "Will create $DN/$CBZ"
		DIR=$(mktemp -d -p "$TMP")
		7z x "$1" -o"$DIR"
		find "$DIR" -type f -print -exec 7z a -tzip "$DN/$CBZ" {} \;
		rm -rf "$DIR"
	fi
}