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#!/bin/bash

FRIEND="world"
HELP="
    Usage: hello [OPTION]...
    Greets the given friend. Defaults to \"$FRIEND\"

      -f, --friend <name>   specify friend to greet
      -h, --help            print this help text
"

while [ "$#" -gt 0 ]; do
    case "$1" in
        -f | --friend)
            FRIEND="$2"
            shift 1
            ;;

        *)
            echo "Unrecognized argument ${1#*=}"
            print-help "$HELP"
            exit 1
            ;;
    esac

    shift
done

echo "Hello, $FRIEND!"
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