More compressed and more privacy in zip files

better_zip.sh

#!/bin/bash

usage(){
    echo "Usage:"
    echo "$0 FOLDER_TO_COMPRESS [-e] [-v]"
    echo "-e: encrypt"
    echo "-v: verbose"
}

compress(){
    local TMP_ZIP="${FOLDER_TO_COMPRESS}.zip"
    zip $VERBOSE -0 -r $TMP_ZIP "${FOLDER_TO_COMPRESS}" && \
    zip $VERBOSE -9 $ENCRYPT $ARCHIVE_NAME $TMP_ZIP && \
    rm "$TMP_ZIP"
}

main(){

    FOLDER_TO_COMPRESS=$1
    ARCHIVE_NAME="${FOLDER_TO_COMPRESS}_archive.zip"
    ENCRYPT=""
    VERBOSE="-q"

    if [ -z "$FOLDER_TO_COMPRESS" ]
    then
        usage
        exit 1
    fi

    shift

    while test $# -gt 0
    do
        case "$1" in
            -e)
                ENCRYPT="-e"
                ;;
            -v)
                VERBOSE=""
                ;;
            *)
                echo "Unknown argument $1"
                echo
                usage
                exit 1
                ;;
        esac
        shift
    done

    compress

    echo "Archive: $ARCHIVE_NAME"
}

main $@