#!/bin/sh

move_content(){
	new_root=$1
	content=$2

	# Recreate the whole path into the new directory.
	new_dir="${new_root}/$(dirname $content)"
	[ -d "${new_dir}" ] || (
		echo mkdir -p "${new_dir}"
		mkdir -p "${new_dir}"
	)
	mv -v "${content}" "${new_dir}"
}

remove_empty_directories(){
	# Search for directories, reverse the order then try to remove them.
	find . -type d | sort -r | while read dir; do
		rmdir "${dir}" 2>/dev/null
	done
}

# usage: create_split new_root regex [regex...]
create_split(){
	new_root=$1 ; shift

	find . | while read F; do
		if [ -e "${F}" ]; then
			for regex in $* ; do
				echo $F | grep -E "${regex}" >/dev/null 2>/dev/null
				if [ $? -eq 0 ] ; then
					move_content "${new_root}" "${F}"
				fi
			done
		fi
	done

	remove_empty_directories
	: # Do not end the function with a potential error.
}