ArrowLoop

Two-way file sync that shows you the plan before it moves anything.

What is this?

ArrowLoop keeps two folders in step: an Unraid share and a laptop, a share and a cloud, or two servers. It remembers what both sides last agreed on, so it can tell a file that is new on one side from one that was deleted on the other. Before a run it lists every change with its direction and its reason; untick what you disagree with, and nothing is touched until you start it. It reaches every rclone backend, compiled in rather than shelled out to: local folders and shares, SMB, SFTP, S3-compatible storage, WebDAV clouds such as Nextcloud and OpenCloud, and the rest. The same engine runs as this container, as a desktop app for Windows, macOS and Linux, and as an Android app.

Highlights & Features

• Every change is listed before a run, and single ones can be dropped

• Deletions go to a trash on the side that loses the file, never straight away

• A run that would delete more than half the known files stops and says so, and a side that suddenly lists nothing is refused, because an unmounted disk looks exactly like an emptied folder

• An edit on both sides keeps both versions, and an edit beats a deletion

• Schedules, real-time watching, scripts before and after a run, and a notification when a run fails

• Encryption at the destination through rclone's crypt

• A password, two-factor authentication and passkeys for the WebUI, under Settings, Security

• 42 languages, light and dark themes

• Images: junkerderprovinz/arrowloop:latest on Docker Hub and ghcr.io/junkerderprovinz/arrowloop:latest, for amd64 and arm64

Requirements

• Unraid 6.10+

• Keep the WebUI on your LAN until you set a password under Settings, Security: until then anyone who can reach it can start a sync that deletes files

• The Data path is mounted read-write, because a two-way job writes to both sides

Bugs, Problems, Wishes

Something not working, a question or an idea? The best place for it is an issue on GitHub: github.com/junkerderprovinz/arrowloop/issues. Everything stays in one place there, and nothing gets lost in a long thread.

For a bug, whether you post it there or here, these help:

• Unraid version (Settings → System Information)

• Image tag (latest or a pinned version)

• Output of docker logs --tail 200 ArrowLoop

• The job's two sides (a local path, an SMB share, a cloud and so on), and what you expected against what happened

• Whether the run stopped with a message, and its text

Credits

Built on rclone, embedded as a library, which is what lets one engine reach every backend. If ArrowLoop keeps your files where they belong, you can buy me a coffee.

Self-hosted, AGPL-3.0 licensed: you run it, you own your data and the responsibility.