bin/make-parent-dirs


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#! /bin/sh
# make-parent-dirs : lines path |> lines directory
# List all parent directories of a path.
set -euf

set -- "$(sed -n 's|/[^/]*$||p' | grep . | sort | uniq)"
if echo "$1" | grep -q .; then
  echo "$1"
  echo "$1" | make-parent-dirs
fi