computer-playbook/roles/backup-to-usb/files/backup-to-usb.python

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#!/usr/bin/env python3
import sys
import subprocess
import shutil
import os
import glob
import datetime
def main():
source_path = sys.argv[1]
print(f"source path: {source_path}")
backup_to_usb_destination_path = sys.argv[2]
print(f"backup to usb destination path: {backup_to_usb_destination_path}")
if not os.path.isdir(backup_to_usb_destination_path):
print(f"Directory {backup_to_usb_destination_path} does not exist")
sys.exit(1)
machine_id = subprocess.run(["sha256sum", "/etc/machine-id"], capture_output=True, text=True).stdout.strip()[:64]
print(f"machine id: {machine_id}")
versions_path = os.path.join(backup_to_usb_destination_path, f"{machine_id}/backup-to-usb/")
print(f"versions path: {versions_path}")
if not os.path.isdir(versions_path):
print(f"Creating {versions_path}...")
os.makedirs(versions_path, exist_ok=True)
previous_version_path = max(glob.glob(f"{versions_path}*"), key=os.path.getmtime, default=None)
print(f"previous versions path: {previous_version_path}")
current_version_path = os.path.join(versions_path, datetime.datetime.now().strftime("%Y%m%d%H%M%S"))
print(f"current versions path: {current_version_path}")
print("Creating backup destination folder...")
os.makedirs(current_version_path, exist_ok=True)
print("Starting synchronization...")
try:
rsync_command = [
"rsync", "-abP", "--delete", "--delete-excluded"
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]
if previous_version_path is not None:
rsync_command.append("--link-dest=" + previous_version_path)
rsync_command.extend([source_path, current_version_path])
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rsync_output = subprocess.check_output(rsync_command, stderr=subprocess.STDOUT, text=True)
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print(rsync_output)
print("Synchronization finished")
sys.exit(0)
except subprocess.CalledProcessError as e:
print(e.output)
if "rsync warning: some files vanished before they could be transferred" in e.output:
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print("Synchronization finished with rsync warning")
sys.exit(0)
else:
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print("Synchronization failed")
sys.exit(1)
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if __name__ == "__main__":
main()