convert *.cbr to *.cbz

cbr2cbz.sh

#!/usr/bin/env bash
#
# Convert cbr files to cbz.

# depends
type -p 7z >/dev/null || exit 3

# trap SIGINT
trap 'trap - INT; kill -s INT "$$"' INT

file() {
    local base=$(basename $1 '.cbr')
    7z x "$1" -o "${temp}/${base}"
    7z a -tzip "${base}.cbz" "${temp}/${base}"
}

usage() {
    cat <<EOF
$(basename $0) <mode> <source>

 Usage:
$(basename $0) --file/-f <target>   convert <target> file
$(basename $0) --dir/-d <target>    convert all files in <target>
$(basename $0) --all                same thing as doing --dir .
EOF
}

main() {
    temp=$(mktemp -d)
    case $1 in
        --file|-f) file "$2" ;;
        --dir|-d)
            find "$2" -type f -name '*.cbr' | while read f; do
                file "$f"
            done ;;
        --all|-a) main --dir . ;;
        *) usage ;;
    esac
    rm -r ${temp}
}

main "$@"