itzg/docker-minecraft-server

Add REMOVE_OLD_CONFIGS

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#3883 opened on Jan 24, 2026

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enhancementhelp wanted

Description

Enhancement Type

Improve an existing feature

Describe the enhancement

It would be awesome if you could implement env var REMOVE_OLD_CONFIGS.

Aim is to delete/cleanup all files in config folder on server boot before it downloads the modpack.

Why do I need this?

Because some mod authors have designed their mod configs badly and have put client and server configurations in single file. Due to that, so that every modpack update wouldn't override client's custom settings, I've moved some of those settings to defaultoptions configs (which are only copied using some specific mods when the file doesn't already exist).

Contributor guide

Tech stack
shelldocker
Domain
devopsinfrastructure
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic shell scriptingDocker basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75
Research direction
Examine the existing startup script, likely `start.sh` or `start deployMojang.sh` in the repository, to understand how environment variables like `REMOVE OLD CONFIGS` should be integrated. Look for similar env vars (e.g., `FORCE REDOWNLOAD`, `OVERRIDE SERVER PROPERTIES`) to see the pattern. The implementation should remove config files before downloading modpack; ensure it handles paths correctly.