Extracts a filesystem from an ignition file

extract-ignition-filesystem.py

#!/usr/bin/env python3

import json
import os
import sys
import base64

ign_file = open(sys.argv[1])
ign_json = json.load(ign_file)
ign_file.close()
for file in ign_json['storage']['files']:
    path = file['path']
    contents = file['contents']['source'].split(',')[1]
    os.makedirs('ign-root' + os.path.dirname(path), exist_ok=True)
    out_file = open('ign-root' + path, "wb+")
    out_file.write(base64.b64decode(contents))
    out_file.close()