arch-installer/lib/validate-args.sh

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function validate_args(){
local num_args="${1}"
shift
if [ "$#" -ne "${num_args}" ]; then
printf '%s\n' "ERROR: ${num_args} arguments required"
return 1
fi
for i in "$@"; do
if [ -z "${i}" ]; then
printf '%s\n' 'ERROR: All given args must not be empty'
return 1
fi
done
}