Move/rename *-{m|h|xh|xxh|xxxh}dpi.png" assets into proper folder structure, ready for copypasta

prepareassets.sh

#!/bin/bash
# License for any modification to the original (linked below):
# ----------------------------------------------------------------------------
# "THE BEER-WARE LICENSE" (Revision 42):
# Sebastiano Poggi wrote this file.  As long as you retain this notice you
# can do whatever you want with this stuff. If we meet some day, and you think
# this stuff is worth it, you can buy me a beer in return.
# ----------------------------------------------------------------------------
prefix=${1-"drawable"}
buckets=( mdpi hdpi xhdpi xxhdpi xxxhdpi )

for density in "${buckets[@]}"
do
	mkdir -p "$prefix-${density}"
	for f in *-"$density.png"
	do 
		newName=${f/-$density.png/.png}
		mv -i "$f" "$prefix-$density/$newName" 
	done
done

This gist is a bash script that takes in all the files in the current directory that match this regex:
(.*)-((:?m|h|xh|xxh|xxxh)dpi)\.png$
and renames/moves them to:
drawable-$2/$1.png

E.g.: the file ic_test_icon-hdpi.png is moved/renamed to drawable-hdpi/ic_test_icon.png

As a side note, if your file names don't have dashes but underscores to separate the density bucket from the rest of the file name (e.g. my_image_hdpi.png instead of my_image-hdpi.png), just edit line 6 and swap out the - replacing it with whatever you might need.