@dhh's bash argument parsing example <https://x.com/dhh/status/1988152033900122174> now amplified with Dorothy's bash conventions and utilities. Dorothy, a dotfile ecosystem, can be found at <https://dorothy.bevry.me>

dhh-example.bash

#!/usr/bin/env bash

function dhh_example() (
	if [[ -n ${DOROTHY-} ]]; then
		source "$DOROTHY/sources/bash.bash"
	else
		eval "$(curl -fsSL 'https://raw.githubusercontent.com/bevry/dorothy/HEAD/sources/bash.bash')"
		eval "$(curl -fsSL 'https://raw.githubusercontent.com/bevry/dorothy/HEAD/sources/styles.bash')"
	fi
	function help {
		__print_help "$@" <<-EOF || return $?
			ABOUT:
			Example for @dhh

			USAGE:
			dhh-example [...options]

			OPTIONS:
			--[no-]cache
			    Do not use cached downloads, redownload everything.

			--[no-]boot-offer
			    Do not offer to set up Dorothy to run at boot/login.

			--[no-]local-source
			    Use local source files instead of downloading from the internet.

			--dev
			    Use the development version of Omarchy Installer.
		EOF
		return 22 # EINVAL 22 Invalid argument
	}
	local item option_cache='yes' option_boot_offer='yes' option_local_source='no' OMARCHY_INSTALLER_REF
	while [[ $# -ne 0 ]]; do
		item="$1"
		shift
		case "$item" in
		--help | -h) help ;;
		--no-cache* | --cache*) __flag --source={item} --target={option_cache} --affirmative ;;
		--no-boot-offer* | --boot-offer*) __flag --source={item} --target={option_boot_offer} --affirmative ;;
		--no-local-source* | --local-source*) __flag --source={item} --target={option_local_source} --affirmative ;;
		--dev) OMARCHY_INSTALLER_REF=dev ;;
		--*) help 'An unrecognised flag was provided: ' --variable-value={item} ;;
		*) help 'An unrecognised argument was provided: ' --variable-value={item} ;;
		esac
	done
	__dump {option_cache} {option_boot_offer} {option_local_source} {OMARCHY_INSTALLER_REF}
)

# fire if invoked standalone
if [[ $0 == "${BASH_SOURCE[0]}" ]]; then
	dhh_example "$@"
fi