#!/usr/bin/env?python
#
#?UnityPackage?Extractor
#
#?Extracts?files/folders?from?a?.unitypackage?file?reading?the?‘pathname‘
#?files?it?contains?to?rebuild?a?“readable“?file/folder?structure.
#
#?Usage:?extractunitypackage.py?input_file?[output_path]
#
#?“input_file“?should?be?a?.unitypackage?file.?The?part?of?the?filename
#?before?the?extension?will?be?used?as?the?name?of?the?directory?that?the?
#?packages?contents?will?be?extracted?to.
#
#?“output_path“?is?an?optional?path?where?the?package‘s?files?will?be
#?extracted?to.?If?omitted?the?current?working?directory?is?used.?If
#?specified?the?path?should?already?exist.

#?Update?（by?Entwicklerpages）:?Simple?fixes?for?python3?support.?Now?works?on?both?versions.

import?os
import?stat
import?shutil
import?sys
import?tarfile

if?len（sys.argv）?	print?（‘No?input?file?specified.‘）
	sys.exit（）

name?extension?=?os.path.splitext（sys.argv[1]）

outputDir?=?‘‘
if?len（sys.argv）?>?2:
	outputDir?=?os.path.join（sys.argv[2]?name）
else:
	outputDir?=?‘./‘?+?name
workingDir?=?‘./.working‘

#?can‘t?proceed?if?the?output?dir?exists?already
#?but?if?the?temp?working?dir?exists?we?clean?it?out?before?extracting
if?os.path.exists（outputDir）:
	print?（‘Output?dir?“‘?+?outputDir?+?‘“?exists.?Aborting.‘）
	sys.exit（）;
if?os.path.exists（workingDir）:
	shutil.rmtree（workingDir）

#?extract?.unitypackage?contents?to?a?temporary?space
tar?=?tarfile.open（sys.argv[1]?‘r:gz‘）
tar.extractall（workingDir）;
tar.close（）

#?build?association?between?the?unitypackage‘s?root?directory?names
#?（which?each?have?1?asset?in?them）?to?the?actual?filename?（stored?in?the?‘pathname‘?file）
mapping?=?{}
for?i?in?os.listdir（workingDir）:
	ro