#!/bin/bash
args="$@" # save arguments to variable 
## Read input arguments, if so 
while [ $# -ge 1 ]; do 
    case $1 in 
        -v | --verbose ) verbose=true;; 
        -z | --gzip ) compression="gz";; 
        -b | --bzip2 ) compression="bz";; 
        -n | --no-compress) compression="none";;
        -h | --help ) showUsage; exit 0 ;; 
        *) echoErr "Invalid option $1. Use -h or --help to show usage"; exit 1 ;; 
    esac
    shift
done

args="$@" # store into args variable
# [...] previous while
argsIterate=($args) # I don't know how to iterate over $args, except convert into an array
for (( i=0;i<${#argsIterate[@]};i++)); do # 1st loop over all arguments
    for (( j=i+1;j<${#argsIterate[@]};j++)); do # 2nd loop over rest arguments
        if ([ "${argsIterate[${i}]}" == "-z" ] && ([ "${argsIterate[${j}]}" == "-b" ] || [ "${argsIterate[${j}]}" == "-n" ])) || \
                ([ "${argsIterate[${i}]}" == "-b" ] && ([ "${argsIterate[${j}]}" == "-z" ] || [ "${argsIterate[${j}]}" == "-n" ])) || \
                ([ "${argsIterate[${i}]}" == "-n" ] && ([ "${argsIterate[${j}]}" == "-z" ] || [ "${argsIterate[${j}]}" == "-b" ])) ; then 
            echo "Incompatible arguments ${argsIterate[${i}]} and ${argsIterate[${j}]}"
            exit -1; 
        fi
    done
done