borgmatic/tests/end-to-end/commands/fake_btrfs.py

94 lines
3.2 KiB
Python

import argparse
import json
import os
import shutil
import sys
def parse_arguments(*unparsed_arguments):
global_parser = argparse.ArgumentParser(add_help=False)
action_parsers = global_parser.add_subparsers(dest='action')
subvolume_parser = action_parsers.add_parser('subvolume')
subvolume_subparser = subvolume_parser.add_subparsers(dest='subaction')
show_parser = subvolume_subparser.add_parser('show')
show_parser.add_argument('subvolume_path')
snapshot_parser = subvolume_subparser.add_parser('snapshot')
snapshot_parser.add_argument('subvolume_path')
snapshot_parser.add_argument('snapshot_path')
delete_parser = subvolume_subparser.add_parser('delete')
delete_parser.add_argument('snapshot_path')
ensure_deleted_parser = subvolume_subparser.add_parser('ensure_deleted')
ensure_deleted_parser.add_argument('snapshot_path')
property_parser = action_parsers.add_parser('property')
property_subparser = property_parser.add_subparsers(dest='subaction')
get_parser = property_subparser.add_parser('get')
get_parser.add_argument('-t', dest='type')
get_parser.add_argument('subvolume_path')
get_parser.add_argument('property_name')
return (global_parser, global_parser.parse_args(unparsed_arguments))
def load_snapshots():
try:
return json.load(open('/tmp/fake_btrfs.json'))
except FileNotFoundError:
return []
def save_snapshots(snapshot_paths):
json.dump(snapshot_paths, open('/tmp/fake_btrfs.json', 'w'))
def print_subvolume_show(arguments):
assert arguments.subvolume_path == '/e2e/mnt/subvolume'
# borgmatic doesn't currently parse the output of "btrfs subvolume show"—it's just checking the
# exit code—so what we print in response doesn't matter in this test.
print('Totally legit btrfs subvolume!')
def main():
(global_parser, arguments) = parse_arguments(*sys.argv[1:])
snapshot_paths = load_snapshots()
if not hasattr(arguments, 'subaction'):
global_parser.print_help()
sys.exit(1)
if arguments.subaction == 'show':
print_subvolume_show(arguments)
elif arguments.subaction == 'snapshot':
snapshot_paths.append(arguments.snapshot_path)
save_snapshots(snapshot_paths)
subdirectory = os.path.join(arguments.snapshot_path, 'subdir')
os.makedirs(subdirectory, mode=0o700, exist_ok=True)
test_file = open(os.path.join(subdirectory, 'file.txt'), 'w')
test_file.write('contents')
test_file.close()
elif arguments.subaction == 'delete':
subdirectory = os.path.join(arguments.snapshot_path, 'subdir')
shutil.rmtree(subdirectory)
snapshot_paths = [
snapshot_path
for snapshot_path in snapshot_paths
if snapshot_path.endswith('/' + arguments.snapshot_path)
]
save_snapshots(snapshot_paths)
# Not a real btrfs subcommand.
elif arguments.subaction == 'ensure_deleted':
assert arguments.snapshot_path not in snapshot_paths
elif arguments.action == 'property' and arguments.subaction == 'get':
print(f'{arguments.property_name}=false')
if __name__ == '__main__':
main()