Fix link issue in copy_dir when link target exists

#!/bin/bash

# Copyright (c) 2020, 2022 Dom Sekotill <dom.sekotill@kodo.org.uk>

# Copyright (c) 2020, 2022, 2024 Dom Sekotill <dom.sekotill@kodo.org.uk>

#

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

	if [[ -h $1 ]]; then

		copy_link "$1"

	elif [[ -d $1 ]]; then

		# copy_dirs may create a link to an existing tree, so use `mkdir -p`

		copy_dirs "$(dirname "$1")"

		mkdir "$STAGE/$1"

		mkdir -p "$STAGE/$1"

	else

		echo >&2 "$1 does not appear to be a directory"

		exit 2