Unstow a package by replaceing all symbolic links with a copy of the files they were pointing to.

unstow.sh

#!/bin/sh

HELP_TEXT="
Usage: $0 [PACKAGE]...

Unstow a package by replacing all symbolic links with a copy of the files they
were pointing to. 
 
This script currently assumes the 'stow dir' is the current dir and that the
'target' is the parent directory. These are the current default values for
stow.
"

unstow_package() {
	stow -D -n -v "$1" 2>&1 | sed -n '/UNLINK:/ba :a s/UNLINK: //p' \
		| while read -r input; do
		printf 'Unstowing: %s\n' "$input"
		if real_path=$(realpath "../$input") \
			&& link_path=$(realpath -s "../$input"); then
			if [ -z "$SIMULATE" ]; then
				rm "$link_path"
				cp -ar "$real_path" "$link_path"
			else
				printf '%s -> %s\n' \
					"$real_path" \
					"$link_path"
			fi
		else
			printf '%s\n' 'Error, unable to find backing file for link!'
		fi
	done
}

if [ $# -eq 0 ]; then
	printf '%s\n' "$HELP_TEXT"
else
	for package in "$@"; do
		unstow_package "$package"
	done
fi