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#!/usr/bin/env python3
Takes a fake root and appends them into a provided ignition configuration.
import argparse
import json
import os
import stat
from urllib.parse import quote
__version__ = '1.0.0'
def file_to_ignition(file_path, file_contents, mode):
Turns a file into an ignition snippet.
:param file_path: Path to where the file should be placed.
:type file_path: str
:param file_contents: The raw contents of the file
:type file_contents: str
:param mode: Octal mode to use (will translate to decimal)
:type mode: int
:returns: Ignition config snippet
:rtype: dict
return {
'path': file_path,
"filesystem": 'root',
'mode': int(mode, 8),
'contents': {
'source': 'data:,{}'.format(quote(file_contents))
def merge_with_ignition(ignition_cfg, files):
Merge file snippets into the ignition config.
:param ignition_cfg: Ignition structure to append to
:type ignition_cfg: dict
:param files: List of Ignition file snippets
:type files: list
:returns: Merged ignition dict
:rtype: dict
# Check that the storage exists
storage_check = ignition_cfg.get('storage')
if storage_check is None:
ignition_cfg['storage'] = {}
# Check that files exists
files_check = ignition_cfg['storage'].get('files')
if files_check is None:
ignition_cfg['storage']['files'] = []
for a_file in files:
return ignition_cfg
def main():
Main entry point
parser = argparse.ArgumentParser()
'-i', '--ignition', help='Path to ignition file to use as the base',
'-f', '--fake-root', help='Path to the fake root',
'-o', '--output',
help='Where to output the file. If empty, will print to stdout')
'-p', '--pretty', default=False, action='store_true',
help='Make the output pretty')
'--version', action='version',
version='%(prog)s {}'.format(__version__))
args = parser.parse_args()
# Open the ignition file and load it
with open(args.ignition, 'r') as f:
# Get the ignition config
ignition_cfg = json.load(f)
# Walk through the files and append them for merging
all_files = []
for root, _, files in os.walk(args.fake_root):
for file in files:
path = os.path.sep.join([root, file])
host_path = path.replace(args.fake_root, '')
if not host_path.startswith(os.path.sep):
host_path = os.path.sep + host_path
mode = oct(stat.S_IMODE(os.stat(path).st_mode))
with open(path, 'r') as file_obj:
snippet = file_to_ignition(
host_path,, mode)
# Merge the and output the results
merged_ignition = merge_with_ignition(ignition_cfg, all_files)
if args.pretty:
ignition_out = json.dumps(
merged_ignition, sort_keys=True,
indent=4, separators=(',', ': '))
ignition_out = json.dumps(merged_ignition)
if args.output:
with open(args.output, 'w') as out_f:
if __name__ == '__main__':
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