43 lines
1.3 KiB

import os
from datetime import datetime
from os.path import join as pathjoin
from os.path import exists
DATADB_ROOT = "/nexus/datadb/backups/"
DATADB_TMP = "/nexus/datadb/tmp/"
DATADB_DIR_TIMESTAMP_FORMAT = "%Y-%m-%dT%H:%M:%S.%f" # Same as isoformat(), but we need to parse it back
class NoBackupException(Exception):
def get_backup_dir(backup_name):
Returns path to this profile's backup base dir. The base dir contains the 'data' directory
return pathjoin(DATADB_ROOT, backup_name)
def get_latest_backup(backup_name):
Get the absolute local path to a backup or raise an exception if none exists. When getting a backup, sort folder
names (they're timestamps) and return newest.
:returns: str absolute path to backup seq /0/
backups_dir = pathjoin(get_backup_dir(backup_name), 'data')
if not exists(backups_dir):
raise NoBackupException("Backup {} does not exist".format(backup_name))
dirs = os.listdir(backups_dir)
if not dirs:
raise NoBackupException("No backups exist for {}".format(backup_name))
dirs = sorted([datetime.strptime(d, DATADB_DIR_TIMESTAMP_FORMAT) for d in dirs])
return pathjoin(backups_dir, dirs[-1].strftime(DATADB_DIR_TIMESTAMP_FORMAT), 'data')