dotfiles/.local/bin/scripts/denest

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#!/bin/sh -e
# Flatten folder hierarchy
# Args: depth
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depth=$(expr 1 \& $# \| 2)
case $1 in ([0-9]|[0-9][0-9]) depth=$1; shift;; esac
find "$@" -mindepth $depth -maxdepth $depth -depth -type d | while read folder; do
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newname="$(echo "$folder" | sed 's|^./||;s|/|_|g')"
mv -v "$folder" "$newname"
parent="$(dirname "$folder")"
test "$(basename "$folder")" = "$(basename "$parent")" &&
rm -d "$parent" &&
mv -v "$newname" "$parent"
done
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find -maxdepth $depth -empty -type d -delete