Provide a script that parses a command and prints out its options and positional arguments.

parse-command.sh

#!/bin/bash

# Define variables for holding positional arguments and options
POSITIONAL=()
OPTIONS=()

# Loop through all arguments passed to the script
while [[ $# -gt 0 ]]
do
    key="$1"

    # Check if the argument is an option or a positional argument
    if [[ "$key" == "--" ]]
        then
            # If -- is encountered, stop parsing options and treat remaining arguments as positional
            shift
            POSITIONAL+=("$@")
            break
    elif [[ ${key:0:2} == "--" ]]
    then
        # Handle options with a value provided using --option value or --option=value syntax
        if [[ "$key" =~ "=" ]]
        then
            option="${key%=*}"
            value="${key#*=}"
        elif [[ "$2" != "" && ${2:0:2} != "--" ]]
        then
            option="$key"
            value="$2"
            shift
        else
            # Handle boolean options
            option="$key"
            value=""
        fi

        # Save the option to the OPTIONS array
        if [[ -z "$value" ]]
        then
          OPTIONS+=("$option")
        else
          OPTIONS+=("$option=$value")
        fi
    else
        # Save the positional argument to the POSITIONAL array
        POSITIONAL+=("$key")
    fi

    # Shift to the next argument
    shift
done

# Print out the positional arguments and options in an easy to understand format
echo "Positional arguments:"
for arg in "${POSITIONAL[@]}"
do
    echo " * $arg"
done

echo "Options:"
for option in "${OPTIONS[@]}"
do
    echo " * $option"
done