Systemd/units/meson-add-wants.sh

#!/bin/sh -eu

unitdir="$1"
target="$2"
unit="$3"

case "$target" in
    */?*) # a path, but not just a slash at the end
        dir="${DESTDIR}${target}"
        ;;
    *)
        dir="${DESTDIR}${unitdir}/${target}"
        ;;
esac

unitpath="${DESTDIR}${unitdir}/${unit}"

case "$target" in
    */)
        mkdir -p -m 0755 "$dir"
        ;;
    *)
        mkdir -p -m 0755 "$(basename "$dir")"
        ;;
esac

ln -vfs --relative "$unitpath" "$dir"