[BUG] Docker image is built using unrar 7.x, but LazyLibrarian requires 4.x, 5.x, or 6.x

[Cryowatt]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

The dockerfile for LazyLibrarian includes unrar from docker image built from docker-unrar on this line:

docker-lazylibrarian/Dockerfile

Line 3 in c22b2a3

FROM ghcr.io/linuxserver/unrar:latest AS unrar

However, since Feb 29, 2024 the latest tag has pointed to unrar v7.x. This version of unrar causes LazyLibrarian to throw errors similar to the following:

Failed to read rar file /books/_Comics/{title}/{file}.cbr, UnpackerNotInstalled b'Unsupported RAR version, expected 4.x, 5.x or 6.x, found: UNRAR 7.11 freeware Copyright (c) 1993-2025 Alexander Roshal'

Expected Behavior

No errors should occur when LazyLibrarian is processing .cbr files.

Steps To Reproduce

1. Enable comics by enabling the Show Comics flag in settings/interface
2. Add a .cbr comic file to /books/_Comics/{title}/{file}
3. Run Library Scan from Comics tab

Environment

OS: TrueNas 25.04.2.4
Installed via Apps

CPU architecture

x86-64

Docker creation

N/A

Container logs

N/A

[github-actions]

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[aptalca]

I feel like this should be reported upstream. It's not like we just switched to a brand new major version and broke it because upstream is lagging slightly. The major version in question came out around 2 years ago. It's better for upstream to add support for it. It may honestly be just an arbitrary restriction (only tested up to v6 perhaps back when the check was implemented), not causing any actual issues.