Parse command line arguments.

args.sh

#!/bin/sh

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set -Ceu

VERSION="1.0.0"

NAME="Honoka"

usage() {
cat << EOF
usage $(basename "$0") [-h] [-n NAME]
optional_arguments:
    -n, --name           your name. (default: $NAME)
    -h, --help           show this help message and exit.
    -v, --version        show version number.
EOF
}

for OPTION in $@
do
    case "$OPTION" in
        -n|--name)
            NAME="$2"
            shift 2
            ;;
        --name=*)
            NAME="${1#*=}"
            NAME="${NAME#[\'\"]}"
            NAME="${NAME%[\'\"]}"
            shift 1
            ;;
        -v|--version)
            echo "$VERSION"
            exit 0
            ;;
        -h|--help)
            usage
            exit 0
            ;;
    esac
done

echo "Hello, $NAME."



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