testing

- Pre-create bStats config with `enabled: false` by default
- Apply changes to CraftBukkit, Spigot, and Paper Dockerfiles
- Consistent with existing implementation in Velocity proxy image

.gitignore

@@ -1,3 +1,4 @@
-data
-.env
+/.env
+/plugins.json
+scratch
 screenlog.0

Makefile

@@ -1,22 +1,96 @@
-DOCKER_COMPOSE_COMMAND = docker compose -f docker-compose.build.yml
+DOCKER_BUILDKIT ?= 1
+BUILDKIT_PROGRESS ?= auto
+BUILD ?= basic
+
+DOCKER_COMPOSE_OPTS = BUILDX_GIT_LABELS=full \
+	DOCKER_BUILDKIT=$(DOCKER_BUILDKIT) \
+	BUILDKIT_PROGRESS=$(BUILDKIT_PROGRESS)
+DOCKER_COMPOSE_BUILD = $(DOCKER_COMPOSE_OPTS) docker compose -f docker-compose.build.yml build
+DOCKER_COMPOSE_UP = docker compose up -d
 
 PRUNE_IMAGES = \
-	localhost/minecraft \
-	localhost/minecraft-base \
-	localhost/minecraft-spigot
+	localhost/minecraft:latest \
+	localhost/minecraft:latest-paper \
+	localhost/minecraft:latest-spigot \
+	localhost/minecraft:latest-craftbukkit \
+	localhost/minecraft-jre:latest \
+	localhost/minecraft-jdk:latest \
+	localhost/velocity:latest
 
-.PHONY: all base vanilla spigot
+.PHONY: all clean configure craftbukkit default install jdk jre spigot vanilla
 default: vanilla
-all: vanilla spigot
+all: vanilla paper spigot craftbukkit velocity
 
-base:
-	$(DOCKER_COMPOSE_COMMAND) build minecraft-base
+jre:
+	$(DOCKER_COMPOSE_BUILD) minecraft-jre
 
-vanilla: base
-	$(DOCKER_COMPOSE_COMMAND) build minecraft-vanilla
+jdk:
+	$(DOCKER_COMPOSE_BUILD) minecraft-jdk
 
-spigot: base
-	$(DOCKER_COMPOSE_COMMAND) build minecraft-spigot
+vanilla: jre
+	$(DOCKER_COMPOSE_BUILD) minecraft-vanilla
+
+paper: jre
+	$(DOCKER_COMPOSE_BUILD) minecraft-paper
+
+spigot: jre jdk
+	$(DOCKER_COMPOSE_BUILD) minecraft-spigot
+
+craftbukkit: jre jdk
+	$(DOCKER_COMPOSE_BUILD) minecraft-craftbukkit
+
+velocity: jre
+	$(DOCKER_COMPOSE_BUILD) minecraft-velocity
+
+install:
+	$(DOCKER_COMPOSE_UP)
+
+# Macro to copy files if they don't already exist or are the same
+define copy_build_files
+	set -eu; \
+	BUILD=$(1) && \
+	FILE=$(2) && \
+	DIRECTORY=$(if $(3),$(3),builds) && \
+	SRC_FILE="./$${DIRECTORY}/$${BUILD}/$${FILE}" && \
+	DEST_FILE="./$${FILE}" && \
+	TEMP_DEST_FILE="$$(mktemp)" && \
+	if [ -f "$${SRC_FILE}" ]; then \
+		if [ -f "$${DEST_FILE}" ]; then \
+			cp "$${DEST_FILE}" "$${TEMP_DEST_FILE}"; \
+			if [ "$${FILE}" = ".env" ] && grep -q 'EULA=false' "$${SRC_FILE}"; then \
+				sed -i 's/EULA=true/EULA=false/' "$${TEMP_DEST_FILE}"; \
+			fi; \
+			if cmp -s "$${SRC_FILE}" "$${TEMP_DEST_FILE}"; then \
+				echo "[INFO]: \"$${DEST_FILE}\" is up to date."; \
+				rm "$${TEMP_DEST_FILE}"; \
+			else \
+				echo "[ERROR]: \"$${DEST_FILE}\" is different from \"$${SRC_FILE}\""; \
+				diff -u "$${DEST_FILE}" "$${SRC_FILE}"; \
+				rm "$${TEMP_DEST_FILE}"; \
+				exit 1; \
+			fi; \
+		else \
+			cp "$${SRC_FILE}" "$${DEST_FILE}"; \
+			echo "[INFO]: \"$${SRC_FILE}\" copied to \"$${DEST_FILE}\""; \
+		fi; \
+	else \
+		echo "[WARN]: Source file \"$${SRC_FILE}\" does not exist."; \
+	fi
+endef
+
+configure:
+	@if [ -d "./builds/$(BUILD)" ]; then \
+		echo "[INFO]: Configuring build $(BUILD) (./builds/$(BUILD))" && \
+		$(call copy_build_files,$(BUILD),.env); \
+		$(call copy_build_files,$(BUILD),plugins.json); \
+	elif [ -d "./scratch/$(BUILD)" ]; then \
+		echo "[INFO]: Configuring build $(BUILD) (./scratch/$(BUILD))" && \
+		$(call copy_build_files,$(BUILD),.env,scratch); \
+		$(call copy_build_files,$(BUILD),plugins.json,scratch); \
+	else \
+		echo "[ERROR]: Build directory for \"$(BUILD)\" not found"; \
+		exit 1; \
+	fi
 
 clean:
 	docker image rm $(PRUNE_IMAGES) || true

README.md

@@ -1,42 +1,79 @@
-# Minecraft Docker Image
-This Dockerfile sets up a Minecraft server based on the `debian-slim` image.
+# Minecraft Container Image
 
 ## Quick Start
-By running the following and building this image, you are agreeing to
-[Minecraft's EULA](https://www.minecraft.net/en-us/eula):
+Assume a clean repository (i.e., without .env and plugins.json in the top
+directory), and Docker cache. You can use `make clean` to clear specific
+default images and prune the unused build cache. However, you'll still need to
+inspect all containers and images to ensure you've removed them all.
+
+- `make clean` only removes certain images and prunes the builder cache.
+
+### Steps
+
+1. **Configure your build:**
+    ```
+    make configure
+    ```
+    This defaults to `make configure BUILD=basic`, but if you have directories
+    in `./scratch`, you can specify those build names here. Repository-included
+    builds are in`./builds`, but it's advised to copy `./builds/basic` or
+    whichever build configuration you are basing off and copy it into
+    `./scratch/X` to control your settings apart from the repository. This
+    separation allows you to manage your configurations independently and avoid
+    overwriting repository defaults.
+
+2.  **Build the PaperMC server:**
+
+    ```
+    make paper
+    ```
+    This builds the PaperMC server, which is likely what you want unless you
+    prefer a 100% vanilla server experience. PaperMC is recommended for its
+    performance benefits and support for Bukkit API server mods. Both
+    EssentialsX and WorldGuard suggest using Paper for better performance and
+    stability.
+
+3.  **(Optional) Install for testing:**
+
+    ```
+    make install
+    ```
+    This runs `docker compose up -d` and brings up a `minecraft-minecraft-1`
+    network/container compose stack using the `.env` and `plugins.json` in the
+    root of the repository. It includes settings for image overrides, the
+    `EULA` agreement, and a `DEBUG` option for the custom `entrypoint.sh`
+    script, Java options (defaulting to `-Xms1G -Xmx2G`), and the ability to
+    set any `server.properties` file entry using the `SETTINGS_` prefix in the
+    compose file. The purpose of `make install` is for testing only, and it is
+    advised not to rely on it for managing an actual server deployment. You
+    will likely want to add other settings not specified in the
+    `docker-compose.yml` and manage your own compose files.
+
+## Additional Notes
+
+### Image Management
+All images are tagged with `localhost/minecraft`, etc. It's acceptable not to
+override these default image names and just tag your own versions after
+building the `localhost` images. The images will include git hash information
+for extra traceability.
+
+After using the quick start, you'll get something like this:
 ```
-echo "EULA=true" > .env
+$ docker image ls
+REPOSITORY                TAG            IMAGE ID       CREATED          SIZE
+localhost/minecraft       1.20.1-paper   814edda474c4   9 seconds ago    568MB
+localhost/minecraft-jre   latest         50350d8d3947   30 seconds ago   379MB
 ```
 
-Build the image using the Makefile:
+It is advisable to tag your own images and push them to a private container
+repository, as you'll want to avoid pushing these images to a public DockerHub
+repository due to the Minecraft EULA with typical proprietary software
+non-redistribution rules.
+
 ```
-make build
+docker tag localhost/minecraft:1.20.1-paper example.org/minecraft:1.20.1-paper
+docker push example.org/minecraft:1.20.1-paper
 ```
 
-Optionally, build _and_ run to test it:
-```
-make install
-```
-
-Feel free to use `docker compose` directly to build and test:
-```
-docker compose build
-docker compose up -d
-docker logs -f minecraft-minecraft-1
-```
-
-## Copyright and License
-Copyright (C) 2024  Kris Lamoureux
-
-[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
-
-This program is free software: you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free Software
-Foundation, version 3 of the License.
-
-This program is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
-PARTICULAR PURPOSE.  See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along with
-this program. If not, see <https://www.gnu.org/licenses/>.
+## License
+This project is licensed under the GPLv3 License. See the LICENSE file for details.

builds/basic/.env

@@ -0,0 +1,28 @@
+# While setting EULA to false in 'builds' is potentially annoying, it is done
+# intentionally to bring to attention the need to manually and explicitly agree
+# to Minecraft's EULA before being able to run or build these images
+EULA=false
+VERSION=1.20.1
+RUN_TAG=${VERSION}-paper
+
+# Builds
+VANILLA_TAG=${VERSION}
+PAPER_TAG=${VERSION}-paper
+SPIGOT_TAG=${VERSION}-spigot
+CRAFTBUKKIT_TAG=${VERSION}-craftbukkit
+
+########################
+# Extra image settings #
+########################
+#
+# JAVA_VERSION=latest
+# JRE_IMAGE=localhost/minecraft-jre
+# JDK_IMAGE=localhost/minecraft-jdk
+# JRE_TAG=latest
+# JDK_TAG=latest
+#
+# VANILLA_IMAGE=localhost/minecraft
+# PAPER_IMAGE=localhost/minecraft
+# SPIGOT_IMAGE=localhost/minecraft
+# CRAFTBUKKIT_IMAGE=localhost/minecraft
+#

builds/basic/plugins.json

@@ -0,0 +1,39 @@
+{
+  "plugins": [
+    {
+      "name": "EssentialsX",
+      "version": "2.20.1",
+      "hash": "sha256:802ea30bda460ca4597e818925816933c123b08d8126a814fac28d03a61bf542",
+      "url": "https://github.com/EssentialsX/Essentials/releases/download/${version}/EssentialsX-${version}.jar",
+      "info_url": "https://essentialsx.net/wiki/Home.html"
+    },
+    {
+      "name": "EssentialsXChat",
+      "version": "2.20.1",
+      "hash": "sha256:40aa5c20241ceb3007ebcb5cfbf19bf2c467b0c090ae50e70653ee87ab775ca6",
+      "url": "https://github.com/EssentialsX/Essentials/releases/download/${version}/EssentialsXChat-${version}.jar",
+      "info_url": "https://essentialsx.net/wiki/Module-Breakdown.html#essentialsx-chat"
+    },
+    {
+      "name": "EssentialsXSpawn",
+      "version": "2.20.1",
+      "hash": "sha256:650d7c6a33865a02c5ffa4eb710def28e73d972c9aef85b2b1f4e71b9bd261a0",
+      "url": "https://github.com/EssentialsX/Essentials/releases/download/${version}/EssentialsXSpawn-${version}.jar",
+      "info_url": "https://essentialsx.net/wiki/Module-Breakdown.html#essentialsx-spawn"
+    },
+    {
+      "name": "WorldEdit",
+      "version": "7.3.1",
+      "hash": "md5:c44cd1c16c3d84d8efc57bbf417606cb",
+      "url": "https://dev.bukkit.org/projects/worldedit/files/5326355/download",
+      "info_url": "https://dev.bukkit.org/projects/worldedit"
+    },
+    {
+      "name": "WorldGuard",
+      "version": "7.0.9",
+      "hash": "md5:70d6418dd6a2e4492a9f18e5f9ecb10c",
+      "url": "https://dev.bukkit.org/projects/worldguard/files/4675318/download",
+      "info_url": "https://dev.bukkit.org/projects/worldguard"
+    }
+  ]
+}

builds/velocity/.env

@@ -0,0 +1,18 @@
+# No EULA requirement to run Velocity
+VERSION=3.3.0-SNAPSHOT
+VELOCITY_TAG=${VERSION}
+
+# Run
+RUN_IMAGE=${VELOCITY_IMAGE:-localhost/velocity}
+RUN_TAG=${VERSION}
+
+########################
+# Extra image settings #
+########################
+#
+# JAVA_VERSION=latest
+# JRE_IMAGE=localhost/minecraft-jre
+# JRE_TAG=latest
+#
+# VELOCITY_IMAGE=localhost/velocity
+#

docker-compose.build.yml

@@ -1,11 +1,21 @@
 services:
-  minecraft-base:
+  minecraft-jre:
     build:
       context: .
-      dockerfile: ./dockerfiles/Dockerfile.base
+      dockerfile: ./dockerfiles/Dockerfile.java
       args:
         JAVA_VERSION: ${JAVA_VERSION:-latest}
-    image: ${BASE_IMAGE:-localhost/minecraft-base}:${BASE_TAG:-latest}
+        JAVA_RUNTIME: 'true'
+    image: ${JRE_IMAGE:-localhost/minecraft-jre}:${JRE_TAG:-latest}
+
+  minecraft-jdk:
+    build:
+      context: .
+      dockerfile: ./dockerfiles/Dockerfile.java
+      args:
+        JAVA_VERSION: ${JAVA_VERSION:-latest}
+        JAVA_RUNTIME: 'false'
+    image: ${JDK_IMAGE:-localhost/minecraft-jdk}:${JDK_TAG:-latest}
 
   minecraft-vanilla:
     build:
@@ -13,24 +23,60 @@ services:
       dockerfile: ./dockerfiles/Dockerfile.vanilla
       args:
         VERSION: ${VERSION:-latest}
-    image: ${IMAGE:-localhost/minecraft}:${TAG:-latest}
+    image: ${VANILLA_IMAGE:-localhost/minecraft}:${VANILLA_TAG:-latest}
     depends_on:
-      - minecraft-base
+      - minecraft-jre
+    environment:
+      EULA: "${EULA:-false}"
+
+  minecraft-paper:
+    build:
+      context: .
+      dockerfile: ./dockerfiles/Dockerfile.paper
+      args:
+        VERSION: ${VERSION:-latest}
+    image: ${PAPER_IMAGE:-localhost/minecraft}:${PAPER_TAG:-latest-paper}
+    depends_on:
+      - minecraft-jre
     environment:
       EULA: "${EULA:-false}"
-      DEBUG: "${DEBUG:-false}"
-      JVM_OPTS: "${JAVA_OPTS:--Xms1G -Xmx2G}"
 
   minecraft-spigot:
     build:
       context: .
-      dockerfile: ./dockerfiles/Dockerfile.spigot
+      dockerfile: ./dockerfiles/Dockerfile.bukkit
       args:
-        VERSION: ${MINECRAFT_VERSION:-latest}
-    image: ${SPIGOT_IMAGE:-localhost/minecraft}:${SPIGOT_TAG:-spigot-latest}
+        VERSION: ${VERSION:-latest}
+        SPIGOT: 'true'
+    image: ${SPIGOT_IMAGE:-localhost/minecraft}:${SPIGOT_TAG:-latest-spigot}
     depends_on:
-      - minecraft-base
+      - minecraft-jre
+      - minecraft-jdk
+    environment:
+      EULA: "${EULA:-false}"
+
+  minecraft-craftbukkit:
+    build:
+      context: .
+      dockerfile: ./dockerfiles/Dockerfile.bukkit
+      args:
+        VERSION: ${VERSION:-latest}
+        SPIGOT: 'false'
+    image: ${CRAFTBUKKIT_IMAGE:-localhost/minecraft}:${CRAFTBUKKIT_TAG:-latest-craftbukkit}
+    depends_on:
+      - minecraft-jre
+      - minecraft-jdk
+    environment:
+      EULA: "${EULA:-false}"
+
+  minecraft-velocity:
+    build:
+      context: .
+      dockerfile: ./dockerfiles/Dockerfile.velocity
+      args:
+        VERSION: ${VELOCITY_VERSION:-latest}
+    image: ${VELOCITY_IMAGE:-localhost/velocity}:${VELOCITY_TAG:-latest}
+    depends_on:
+      - minecraft-jre
     environment:
       EULA: "${EULA:-false}"
-      DEBUG: "${DEBUG:-false}"
-      JVM_OPTS: "${JAVA_OPTS:--Xms1G -Xmx2G}"

docker-compose.yml

@@ -0,0 +1,13 @@
+services:
+  minecraft:
+    image: ${RUN_IMAGE:-localhost/minecraft}:${RUN_TAG:-latest}
+    ports:
+      - "0.0.0.0:25565:25565"
+    environment:
+      EULA: "${EULA:-false}"
+      DEBUG: "${DEBUG:-false}"
+      JVM_OPTS: "${JAVA_OPTS:--Xms1G -Xmx2G}"
+      SETTINGS_gamemode: "${GAMEMODE:-survival}"
+      SETTINGS_hardcore: "${HARDCORE:-false}"
+      SETTINGS_motd: "${MOTD:-A Minecraft Server}"
+      SETTINGS_pvp: "${PVP:-true}"

dockerfiles/Dockerfile.base

@@ -1,39 +0,0 @@
-FROM debian:stable-slim
-
-ARG JAVA_VERSION=latest
-ENV DEBIAN_FRONTEND=noninteractive
-
-# Create minecraft user
-RUN groupadd -g 1000 minecraft && \
-    useradd -m -u 1000 -g 1000 -d /app minecraft
-
-# Install scripting dependencies
-RUN apt-get update && \
-    apt-get install -y curl git gpg jq procps screen strace && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/*
-
-# Eclipse Adoptium DEB installer package
-RUN set -ux && \
-  # Download the Eclipse Adoptium GPG key
-  curl -s https://packages.adoptium.net/artifactory/api/gpg/key/public \
-    | gpg --dearmor | tee /etc/apt/trusted.gpg.d/adoptium.gpg > /dev/null && \
-  # Configure the Eclipse Adoptium apt repository
-  VERSION_CODENAME="$(awk -F= '/^VERSION_CODENAME/{print $2}' /etc/os-release)" && \
-  echo "deb https://packages.adoptium.net/artifactory/deb $VERSION_CODENAME main" \
-    | tee /etc/apt/sources.list.d/adoptium.list
-
-# Install Adoptium Temurin (OpenJDK Distribution)
-RUN set -ux && \
-  # Grab latest LTS version if not specified
-  if [ "$JAVA_VERSION" = "latest" ]; then \
-    JAVA_VERSION="$( \
-      curl -s https://api.adoptium.net/v3/info/available_releases \
-        | jq '.most_recent_lts' \
-    )"; \
-  fi && \
-  # Install the Temurin version
-  apt-get update && \
-  apt-get install -y "temurin-${JAVA_VERSION}-jre" && \
-  apt-get clean && \
-  rm -rf /var/lib/apt/lists/*

dockerfiles/Dockerfile.bukkit

@@ -0,0 +1,136 @@
+# Build from OpenJDK image
+FROM "${JDK_IMAGE:-localhost/minecraft-jdk}":"${JDK_TAG:-latest}" as build
+
+# Minecraft version
+ARG VERSION=latest
+
+# Defaults to building Spigot over CraftBukkit
+ARG SPIGOT=true
+
+# Plugins prefix
+ARG PREFIX="PLUGIN_"
+
+# SpigotMC BuildTools URL
+ARG BASE_URL="https://hub.spigotmc.org/jenkins/job/BuildTools/"
+ARG ARTIFACT_PATH="lastSuccessfulBuild/artifact/target/BuildTools.jar"
+
+# Consider turning bStats (https://bStats.org) on but I'm turning it off by
+# default because it collects information
+ARG BSTATS_ENABLED=false
+
+# Build in common container location
+WORKDIR /build
+
+# Download and build Spigot using BuildTools
+RUN set -eux && \
+# Grab latest version if not specified
+  if [ "$VERSION" = "latest" ]; then \
+    VERSION="$( \
+      curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \
+        | jq -r '.latest.release' \
+    )"; \
+  fi && \
+  # Download BuildTools.jar
+  curl -s -o BuildTools.jar "${BASE_URL}${ARTIFACT_PATH}" && \
+  # Build Craftbukkit if SPIGOT is false
+  case "$SPIGOT" in \
+    true) \
+      BUILD_TYPE='SPIGOT' ;; \
+    false) \
+      BUILD_TYPE='CRAFTBUKKIT' ;; \
+    *) \
+      echo "[ERROR]: Invalid value for SPIGOT. Set to 'true' or 'false'"; \
+      exit 1 ;; \
+  esac && \
+  # Run BuildTools to build specified version
+  java -jar BuildTools.jar --rev "$VERSION" --compile "$BUILD_TYPE" && \
+  ln -s \
+    "$(echo "$BUILD_TYPE" | tr '[:upper:]' '[:lower:]')-${VERSION}.jar" \
+    "server.jar"
+
+# Move into a directory just for storing plugins
+WORKDIR /plugins
+
+# Copy in plugins
+COPY ../plugins.json /plugins/
+
+# Download defined plugins
+RUN set -eux && \
+  # Download defined plugins and check against hash
+  tmp_downloads="$(mktemp -d)" && \
+  # Iterate over all plugins in plugins.json
+  jq -c '.plugins[]' plugins.json | while read -r PLUGIN; do \
+    # Set variables from plugins.json
+    name=$(echo "$PLUGIN" | jq -r '.name') && \
+    version=$(echo "$PLUGIN" | jq -r '.version') &&  \
+    # Interpolate instances of '${version}' in the URL
+    url=$(echo "$PLUGIN" | jq -r '.url' | sed "s/\${version}/$version/g") && \
+    hash=$(echo "$PLUGIN" | jq -r '.hash') &&  \
+    info=$(echo "$PLUGIN" | jq -r '.info_url') && \
+    # Extract hash type and value, e.g., `md5:6f5902ac237024bdd0c176cb93063dc4`
+    hash_type=$(echo "$hash" | cut -d':' -f1) && \
+    hash_value=$(echo "$hash" | cut -d':' -f2-) && \
+    # Download and compare the hash
+    tmp_file="${tmp_downloads}/${name}-${version}.jar" && \
+    curl -s -L "$url" -o "${tmp_file}" && \
+    case "$hash_type" in \
+      sha256) \
+        echo "${hash_value}  $tmp_file" | sha256sum -c - || { \
+          echo "SHA256 hash mismatch for ${name}-${version}.jar"; \
+          rm -rf "$tmp_downloads"; \
+          exit 1; \
+        } \
+        ;; \
+      md5) \
+        echo "${hash_value}  $tmp_file" | md5sum -c - || { \
+          echo "MD5 hash mismatch for ${name}-${version}.jar"; \
+          rm -rf "$tmp_downloads"; \
+          exit 1; \
+        } \
+        ;; \
+      *) \
+        echo "Unsupported hash type: ${hash_type}"; \
+        rm -rf "$tmp_downloads"; \
+        exit 1; \
+        ;; \
+    esac && \
+    mv "$tmp_file" "${name}-${version}.jar"; \
+  done && \
+  rm -rf "$tmp_downloads"
+
+# Use OpenJRE image for runtime
+FROM "${JRE_IMAGE:-localhost/minecraft-jre}":"${JRE_TAG:-latest}" as runtime
+
+# Run as Minecraft user
+USER minecraft
+WORKDIR /app
+
+# Copy the built bukkit jar from the build stage
+COPY --from=build /build/server.jar /app/server.jar
+
+# Copy in plugins
+COPY --from=build /plugins/ /app/plugins/
+
+# Generate initial settings
+RUN java -jar server.jar --initSettings --nogui && \
+  # Disable bStats by default
+  if [ "$BSTATS_ENABLED" = "false" ]; then \
+    mkdir -p /app/plugins/bStats/ && \
+    echo "enabled: false" > /app/plugins/bStats/config.yml; \
+  fi
+
+# Back to root to copy the entrypoint in
+USER root
+WORKDIR /app
+
+# Copy in entrypoint script
+COPY ../entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+# Run app as minecraft user
+USER minecraft
+WORKDIR /app
+
+# Expose port and run entrypoint script
+EXPOSE 25565
+ENTRYPOINT ["entrypoint.sh"]

dockerfiles/Dockerfile.java

@@ -0,0 +1,60 @@
+FROM debian:stable-slim
+
+ARG JAVA_RUNTIME
+ARG JAVA_VERSION=latest
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install scripting dependencies
+RUN apt-get update && \
+    apt-get install -y curl git gpg jq && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Eclipse Adoptium DEB installer package
+RUN set -eux && \
+  # Download the Eclipse Adoptium GPG key
+  curl -s https://packages.adoptium.net/artifactory/api/gpg/key/public \
+    | gpg --dearmor | tee /etc/apt/trusted.gpg.d/adoptium.gpg > /dev/null && \
+  # Configure the Eclipse Adoptium APT repository
+  VERSION_CODENAME="$(awk -F= '/^VERSION_CODENAME/{print $2}' /etc/os-release)" && \
+  echo "deb https://packages.adoptium.net/artifactory/deb $VERSION_CODENAME main" \
+    | tee /etc/apt/sources.list.d/adoptium.list
+
+# Install Adoptium Temurin (OpenJDK/OpenJRE)
+RUN set -eux && \
+  # Grab latest LTS version if not specified
+  if [ "$JAVA_VERSION" = "latest" ]; then \
+    JAVA_VERSION="$( \
+      curl -s https://api.adoptium.net/v3/info/available_releases \
+        | jq '.most_recent_lts' \
+    )"; \
+  fi && \
+  # Install OpenJDK if JAVA_RUNTIME is false
+  case "$JAVA_RUNTIME" in \
+    true) \
+      JAVA_TYPE='jre' ;; \
+    false) \
+      JAVA_TYPE='jdk' ;; \
+    *) \
+      echo "[ERROR]: Invalid value for JAVA_RUNTIME. Set to 'true' or 'false'"; \
+      exit 1 ;; \
+  esac && \
+  # Install the Temurin version
+  apt-get update && \
+  apt-get install -y "temurin-$JAVA_VERSION-$JAVA_TYPE" && \
+  apt-get clean && \
+  rm -rf /var/lib/apt/lists/*
+
+# Create minecraft user for runtime
+RUN if [ "$JAVA_RUNTIME" = "true" ]; then \
+      groupadd -g 1000 minecraft && \
+      useradd -m -u 1000 -g 1000 -d /app minecraft; \
+    fi
+
+# Install additional runtime dependencies
+RUN if [ "$JAVA_RUNTIME" = "true" ]; then \
+      apt-get update && \
+      apt-get install -y procps screen strace && \
+      apt-get clean && \
+      rm -rf /var/lib/apt/lists/*; \
+    fi

dockerfiles/Dockerfile.paper

@@ -0,0 +1,120 @@
+FROM "${JRE_IMAGE:-localhost/minecraft-jre}":"${JRE_TAG:-latest}"
+
+# Minecraft version to download
+ARG VERSION=latest
+
+# Plugins prefix
+ARG PREFIX="PLUGIN_"
+
+# PaperMC base URL
+ARG BASE_URL="https://api.papermc.io/v2/projects/paper/versions/${VERSION}"
+
+# Consider turning bStats (https://bStats.org) on but I'm turning it off by
+# default because it collects information
+ARG BSTATS_ENABLED=false
+
+# Download files
+USER root
+WORKDIR /app
+
+# Download and verify sha256sum for PaperMC server.jar
+RUN set -eux && \
+  # Grab latest version if not specified
+  if [ "$VERSION" = "latest" ]; then \
+    VERSION="$( \
+      curl -s https://api.papermc.io/v2/projects/paper | \
+        jq -r '.versions[-1]' \
+    )"; \
+  fi && \
+  # Get latest build for the specified version
+  BUILD="$( \
+    curl -s "$BASE_URL" \
+      | jq -r '.builds[-1]' \
+  )" && \
+  URL="${BASE_URL}/builds/${BUILD}/downloads/paper-${VERSION}-${BUILD}.jar" && \
+  curl -s -o /tmp/server.jar "$URL" && \
+  # Get SHA256 hash of server.jar and compare
+  SHA256="$(sha256sum /tmp/server.jar | awk '{print $1}')" && \
+  EXPECTED="$( \
+    curl -s "$BASE_URL/builds/$BUILD" \
+      | jq -r '.downloads.application.sha256' \
+  )" && \
+  if [ ! "$SHA256" = "$EXPECTED" ]; then \
+    echo "[ERROR]: SHA256=\"$SHA256\" expected \"$EXPECTED\""; \
+    exit 1; \
+  fi && \
+  mv /tmp/server.jar /app/server.jar
+
+# Move into a directory just for storing plugins
+WORKDIR /app/plugins
+
+# Copy in plugins
+COPY ../plugins.json /app/plugins
+
+# Download defined plugins
+RUN set -eux && \
+  # Download defined plugins and check against hash
+  tmp_downloads="$(mktemp -d)" && \
+  # Iterate over all plugins in plugins.json
+  jq -c '.plugins[]' plugins.json | while read -r PLUGIN; do \
+    # Set variables from plugins.json
+    name=$(echo "$PLUGIN" | jq -r '.name') && \
+    version=$(echo "$PLUGIN" | jq -r '.version') &&  \
+    # Interpolate instances of '${version}' in the URL
+    url=$(echo "$PLUGIN" | jq -r '.url' | sed "s/\${version}/$version/g") && \
+    hash=$(echo "$PLUGIN" | jq -r '.hash') &&  \
+    info=$(echo "$PLUGIN" | jq -r '.info_url') && \
+    # Extract hash type and value, e.g., `md5:6f5902ac237024bdd0c176cb93063dc4`
+    hash_type=$(echo "$hash" | cut -d':' -f1) && \
+    hash_value=$(echo "$hash" | cut -d':' -f2-) && \
+    # Download and compare the hash
+    tmp_file="${tmp_downloads}/${name}-${version}.jar" && \
+    curl -s -L "$url" -o "${tmp_file}" && \
+    case "$hash_type" in \
+      sha256) \
+        echo "${hash_value}  $tmp_file" | sha256sum -c - || { \
+          echo "SHA256 hash mismatch for ${name}-${version}.jar"; \
+          rm -rf "$tmp_downloads"; \
+          exit 1; \
+        } \
+        ;; \
+      md5) \
+        echo "${hash_value}  $tmp_file" | md5sum -c - || { \
+          echo "MD5 hash mismatch for ${name}-${version}.jar"; \
+          rm -rf "$tmp_downloads"; \
+          exit 1; \
+        } \
+        ;; \
+      *) \
+        echo "Unsupported hash type: ${hash_type}"; \
+        rm -rf "$tmp_downloads"; \
+        exit 1; \
+        ;; \
+    esac && \
+    mv "$tmp_file" "${name}-${version}.jar"; \
+  done && \
+  rm -rf "$tmp_downloads" && \
+  chown minecraft:minecraft /app/plugins/
+
+# Generate initial settings
+USER minecraft
+WORKDIR /app
+RUN java -jar server.jar --initSettings --nogui && \
+  # Disable bStats by default
+  if [ "$BSTATS_ENABLED" = "false" ]; then \
+    mkdir -p /app/plugins/bStats/ && \
+    echo "enabled: false" > /app/plugins/bStats/config.yml; \
+  fi
+
+# Back to root to copy the entrypoint in
+USER root
+COPY ../entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+# Run app as minecraft user
+USER minecraft
+WORKDIR /app
+
+# Expose port and run entrypoint script
+EXPOSE 25565
+ENTRYPOINT ["entrypoint.sh"]

dockerfiles/Dockerfile.spigot

@@ -1,45 +0,0 @@
-FROM "${BASE_IMAGE:-localhost/minecraft-base}":"${BASE_TAG:-latest}"
-
-# Minecraft version
-ARG VERSION=latest
-
-# SpigotMC BuildTools URL
-ARG BASE_URL="https://hub.spigotmc.org/jenkins/job/BuildTools/"
-ARG ARTIFACT_PATH="lastSuccessfulBuild/artifact/target/BuildTools.jar"
-
-# Download files and run as user
-USER minecraft
-WORKDIR /app
-
-# Download and build Spigot using BuildTools
-RUN set -ux && \
-# Grab latest version if not specified
-  if [ "$VERSION" = "latest" ]; then \
-    VERSION="$( \
-      curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \
-        | jq -r '.latest.release' \
-    )"; \
-  fi && \
-  # Download BuildTools.jar
-  curl -s -o BuildTools.jar "${BASE_URL}${ARTIFACT_PATH}" && \
-  ## Run BuildTools to build specified version
-  java -jar BuildTools.jar --rev "$VERSION" --compile SPIGOT
-
-# Generate initial settings
-RUN java -jar server.jar --initSettings --nogui
-
-# Back to root to copy the entrypoint in
-USER root
-WORKDIR /app
-
-# Copy in entrypoint script
-COPY ../entrypoint.sh /usr/local/bin/entrypoint.sh
-RUN chmod +x /usr/local/bin/entrypoint.sh
-
-# Run app as minecraft user
-USER minecraft
-WORKDIR /app
-
-# Expose port and run entrypoint script
-EXPOSE 25565
-ENTRYPOINT ["entrypoint.sh"]

dockerfiles/Dockerfile.vanilla

@@ -1,6 +1,6 @@
-FROM "${BASE_IMAGE:-localhost/minecraft-base}":"${BASE_TAG:-latest}"
+FROM "${JRE_IMAGE:-localhost/minecraft-jre}":"${JRE_TAG:-latest}"
 
-# Minecraft version
+# Minecraft version to download
 ARG VERSION=latest
 
 # Download files and run as user
@@ -8,7 +8,7 @@ USER minecraft
 WORKDIR /app
 
 # Download and verify sha1sum for server.jar
-RUN set -ux && \
+RUN set -eux && \
 # Grab latest version if not specified
   if [ "$VERSION" = "latest" ]; then \
     VERSION="$( \
@@ -25,7 +25,7 @@ RUN set -ux && \
   SHA1="$(sha1sum server.jar | awk '{print $1}')" && \
   EXPECTED="$(jq -r .sha1 /tmp/dl.json)"; rm /tmp/dl.json && \
   if [ ! "$SHA1" = "$EXPECTED" ]; then \
-    echo "[ERROR] SHA1=\"$SHA1\" expected \"$EXPECTED\""; \
+    echo "[ERROR]: SHA1=\"$SHA1\" expected \"$EXPECTED\""; \
     exit 1; \
   fi
 

dockerfiles/Dockerfile.velocity

@@ -0,0 +1,90 @@
+FROM "${JRE_IMAGE:-localhost/minecraft-jre}":"${JRE_TAG:-latest}"
+
+# Server version to download
+ARG VERSION=latest
+
+# PaperMC base URL
+ARG BASE_URL="https://api.papermc.io/v2/projects/velocity/versions"
+
+# Consider turning bStats (https://bStats.org) on but I'm turning it off by
+# default because it collects information
+ARG BSTATS_ENABLED=false
+
+# For the entrypoint.sh script
+ENV VELOCITY=true
+
+# Download files
+USER root
+WORKDIR /app
+
+# Install expect
+RUN apt-get update && \
+    apt-get install -y expect && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Download and verify sha256sum for Velocity
+RUN set -eux && \
+  # Grab latest version if not specified
+  if [ "$VERSION" = "latest" ]; then \
+    VERSION="$( \
+      curl -s https://api.papermc.io/v2/projects/velocity | \
+        jq -r '.versions[-1]' \
+    )"; \
+  fi && \
+  # Get latest build for the specified version
+  BUILD="$( \
+    curl -s "${BASE_URL}/${VERSION}" \
+      | jq -r '.builds[-1]' \
+  )" && \
+  URL="${BASE_URL}/${VERSION}/builds/${BUILD}/downloads/velocity-${VERSION}-${BUILD}.jar" && \
+  curl -s -o /tmp/server.jar "$URL" && \
+  # Get SHA256 hash of server.jar and compare
+  SHA256="$(sha256sum /tmp/server.jar | awk '{print $1}')" && \
+  EXPECTED="$( \
+    curl -s "$BASE_URL/$VERSION/builds/$BUILD" \
+      | jq -r '.downloads.application.sha256' \
+  )" && \
+  if [ ! "$SHA256" = "$EXPECTED" ]; then \
+    echo "[ERROR]: SHA256=\"$SHA256\" expected \"$EXPECTED\""; \
+    exit 1; \
+  fi && \
+  mv /tmp/server.jar /app/velocity.jar
+
+# Generate files as minecraft user
+USER minecraft
+WORKDIR /app
+
+# Start server to generate initial files
+RUN set -ux; \
+  expect -c "\
+    set timeout -1; \
+    spawn /usr/bin/java -Xms1G -Xmx1G -XX:+UseG1GC -XX:G1HeapRegionSize=4M \
+      -XX:+UnlockExperimentalVMOptions -XX:+ParallelRefProcEnabled \
+      -XX:+AlwaysPreTouch -XX:MaxInlineLevel=15 -jar velocity.jar; \
+    expect -re {\[[0-9]{2}:[0-9]{2}:[0-9]{2} INFO\]: Done .*!} { \
+      send \"stop\r\"; \
+      expect eof \
+    } \
+  " && \
+  # Disable bStats by default and clear server-uuid
+  cd /app/plugins/bStats/ || exit 1; \
+  sed -i.bak "s/^enabled=.*\$/enabled=${BSTATS_ENABLED}/" config.txt && \
+  diff --unified=1 config.txt.bak config.txt || true && rm config.txt.bak && \
+  sed -i.bak "s/^server-uuid=.*\$/server-uuid=/" config.txt && \
+  diff --unified=1 config.txt.bak config.txt || true && rm config.txt.bak && \
+  # Truncate forwarding secret
+  truncate -s 0 /app/forwarding.secret
+
+# Back to root to copy the entrypoint in
+USER root
+COPY ../entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+# Run app as minecraft user
+USER minecraft
+WORKDIR /app
+
+# Expose port and run entrypoint script
+EXPOSE 25565
+ENTRYPOINT ["entrypoint.sh"]

entrypoint.sh

@@ -1,19 +1,188 @@
 #!/bin/bash
+set -eu
+
+# Set eula value in eula.txt
+set_eula() {
+  local EULA
+  EULA="${1:-false}"
+  EULAFILE="${EULAFILE:-/app/eula.txt}"
+  sed -i.bak "s/^eula=.*\$/eula=${EULA:-false}/" "$EULAFILE"
+  diff --unified=1 "${EULAFILE}.bak" "$EULAFILE" || true
+  rm "${EULAFILE}.bak"
+}
+
+# Update server.properties using env
+set_properties() {
+  # Basic settings
+  DEBUG="${DEBUG:-false}"
+  PREFIX="${PREFIX:-SETTINGS_}"
+  FILE="${FILE:-/app/server.properties}"
+
+  # Update server.properties
+  while IFS='=' read -r ENVVAR VALUE ; do
+    if echo "$ENVVAR" | grep -q "^${PREFIX}.*$"; then
+      KEY="${ENVVAR#"$PREFIX"}"
+      if ! grep -q "^${KEY}=" "$FILE"; then
+        echo "[WARN]: \"$KEY\" does not exist in $FILE and was not updated"
+      else
+        [ "$DEBUG" = "true" ] && echo "[DEBUG]: Updating \"$KEY\" to \"$VALUE\""
+        sed -i.bak "s/^${KEY}=.*/${KEY}=${VALUE}/" "$FILE"
+        diff --unified=1 "${FILE}.bak" "$FILE" || true
+        rm "${FILE}.bak"
+      fi
+    else
+      if [ "$DEBUG" = "true" ]; then
+        echo "[DEBUG]: \"$ENVVAR\" doesn't have the prefix \"$PREFIX\""
+      fi
+    fi
+  done < <(env)
+
+  # Show server.properties in DEBUG mode
+  if [ "$DEBUG" = "true" ]; then
+    echo "[DEBUG]: Showing ${FILE}:"
+    cat "$FILE"
+  fi
+}
+
+# Set Velocity's forwarding.secret
+set_forwarding_secret() {
+  local WRITE_FILE
+  local FILE_CONTENT
+  WRITE_FILE=false
+
+  # Check file is not empty
+  if [ -s /app/forwarding.secret ]; then
+    FILE_CONTENT="$(head -c 1025 /app/forwarding.secret)"
+    # Check that FORWARDING_SECRET is blank
+    if [ ! "${#FORWARDING_SECRET}" -gt 0 ]; then
+      # Only the file was set, so FORWARDING_SECRET becomes the file
+      FORWARDING_SECRET="$(head -c 1025 /app/forwarding.secret)"
+    else
+      if [ ! "$FORWARDING_SECRET" = "$FILE_CONTENT" ]; then
+        # You should either bind mount a file in OR set a value
+        echo "[ERROR]: FORWARDING_SECRET is set with an existing file"
+        exit 1
+      fi
+    fi
+  # If the file is zero, we make sure the variable isn't also zero
+  elif [ "${#FORWARDING_SECRET}" -eq 0 ]; then
+    echo "[ERROR]: You must set FORWARDING_SECRET or set a value in the file"
+    exit 1
+  else
+    # File is zero, so we must write the variable out to the file
+    WRITE_FILE=true
+  fi
+
+  # Check length
+  if [ "${#FORWARDING_SECRET}" -lt 32 ]; then
+    echo "[ERROR]: FORWARDING_SECRET needs to be at least 32 characters long"
+    exit 1
+  elif [ "${#FORWARDING_SECRET}" -gt 1024 ]; then
+    echo "[ERROR]: FORWARDING_SECRET is >1024 bytes"
+    exit 1
+  fi
+
+  # Add secret to file
+  if [ "$WRITE_FILE" = "true" ]; then
+    echo "$FORWARDING_SECRET" > /app/forwarding.secret
+  fi
+
+  # Unset sensitive value
+  unset FORWARDING_SECRET
+}
 
 # Check if the minecraft screen is still running
+# shellcheck disable=SC2317
 check_screen() {
-  if [ "$(screen -ls | grep -cE '[0-9]+\.minecraft')" -eq 1 ]; then
+  local SCREEN_NAME
+  SCREEN_NAME="$1"
+  if [ "$(screen -ls | grep -cE "[0-9]+\.$SCREEN_NAME")" -eq 1 ]; then
     return 0
   else
     return 1
   fi
 }
 
+# Find Java PID, strace it, and wait for it to exit
+wait_on_java() {
+  local JAVA_PID
+  local JAVA_EXIT
+
+  # Debug mode
+  [ "$DEBUG" = "true" ] && ps aux
+
+  # Capture PID and test
+  JAVA_PID="$(pgrep java)"
+  if ! kill -0 "$SCREEN_PID" 2>/dev/null; then
+    echo "[ERROR]: Cannot find running Java process (PID: \"$JAVA_PID\")"
+    exit 1
+  fi
+
+  # strace Java PID and get return code
+  JAVA_EXIT="$(strace -e trace=exit -p "$JAVA_PID" 2>&1 \
+    | grep -oP '^\+\+\+ exited with \K[0-9]+')"
+
+  # Delay if Java exits non-zero
+  if [ ! "$JAVA_EXIT" = "0" ]; then
+    echo "[ERROR]: Java exited with non-zero status"
+    sleep "${EXIT_DELAY:-5}"
+    exit "$JAVA_EXIT"
+  fi
+}
+
+# Find screen PID, strace it, and wait for it to exit
+wait_on_screen() {
+  local SCREEN_PID
+  local SCREEN_NAME
+  local STRACE_PID
+  local TAIL_PID
+
+  SCREEN_NAME="$1"
+
+  # Get screen PID
+  [ "$DEBUG" = "true" ] && screen -ls
+  SCREEN_PID="$(
+    screen -ls | grep -oE "[0-9]+\.$SCREEN_NAME" | cut -d. -f1
+  )"
+
+  # Check screen PID
+  if ! kill -0 "$SCREEN_PID" 2>/dev/null; then
+    echo "[ERROR] Cannot find \"$SCREEN_NAME\" screen (PID: \"$SCREEN_PID\")"
+    exit 1
+  fi
+
+  # Output logs to stdout (touch in case slow to create)
+  touch screenlog.0
+  tail -f screenlog.0 &
+  TAIL_PID="$!"
+
+  # Debug mode
+  [ "$DEBUG" = "true" ] && ps aux
+
+  # Wait for screen to exit
+  strace -e exit -e signal=none -p "$SCREEN_PID" 2>/dev/null &
+  STRACE_PID="$!"
+
+  # Wait on Java PID first
+  wait_on_java
+
+  # Wait if screen is somehow still running
+  wait "$STRACE_PID"
+
+  # Kill tail PID
+  if kill -0 "$TAIL_PID" 2>/dev/null; then
+    kill "$TAIL_PID"
+  fi
+}
+
 # Function to stop the server gracefully
+# shellcheck disable=SC2317
 stop_server() {
-  if check_screen; then
+  local SCREEN_NAME
+  SCREEN_NAME="$1"
+  if check_screen "$SCREEN_NAME"; then
     # Run 'stop' inside screen and wait for the screen to exit
-    /usr/bin/screen -p 0 -S minecraft -X eval 'stuff "stop"\015'
+    /usr/bin/screen -p 0 -S "$SCREEN_NAME" -X eval 'stuff "stop"\015'
     wait "$STRACE_PID"
 
     # Stop tail -f to stdout
@@ -24,13 +193,13 @@ stop_server() {
     # Check only this script is running (PID 1) and pgrep (2 PIDs total)
     PGREP_OUTPUT="$(pgrep .)"
     if ! [ "$(echo "$PGREP_OUTPUT" | wc -l)" -eq 2 ]; then
-      echo "[WARN] Some processes might not have exited:"
+      echo "[WARN]: Some processes might not have exited:"
       echo "$PGREP_OUTPUT"
       exit 1
     fi
 
     # Exit cleanly
-    echo "[INFO] Server stopped gracefully"
+    echo "[INFO]: Server stopped gracefully"
     exit 0
   else
     echo "[ERROR]: Can't find which screen to use"
@@ -39,77 +208,75 @@ stop_server() {
   fi
 }
 
+# Start the Minecraft server
+minecraft_server() {
+  # Settings
+  JVM_OPTS="${JVM_OPTS:--Xms1G -Xmx2G}"
+
+  # Set EULA
+  set_eula "${EULA:-false}"
+
+  # Update server.properties using env
+  set_properties
+
+  # Set up a SIGTERM signal trap to stop the server
+  trap 'stop_server minecraft' SIGTERM
+
+  # temp
+  ls -al /app
+  ls -al /app/config
+
+  # Run server in screen (without attaching)
+  echo "[INFO]: Starting Minecraft server"
+  /usr/bin/screen -dmS minecraft -L \
+    bash -c "/usr/bin/java $JVM_OPTS -jar server.jar --nogui"
+
+  # Wait for 'minecraft' screen PID to exit
+  wait_on_screen minecraft
+  exit 0
+}
+
+# Start the Velocity proxy Minecraft server
+velocity_server() {
+  # Settings
+  JVM_OPTS="${JVM_OPTS:--Xms1G -Xmx2G}"
+
+  # Ensure there is a forwarding.secret
+  set_forwarding_secret
+
+  # Set up a SIGTERM signal trap to stop the server
+  trap 'stop_server velocity' SIGTERM
+
+  # Start server
+  echo "[INFO]: Starting Velocity server"
+  /usr/bin/screen -dmS velocity -L \
+    bash -c "
+      /usr/bin/java $JVM_OPTS -XX:+UseG1GC -XX:G1HeapRegionSize=4M \
+        -XX:+UnlockExperimentalVMOptions -XX:+ParallelRefProcEnabled \
+        -XX:+AlwaysPreTouch -XX:MaxInlineLevel=15 -jar velocity.jar
+    "
+
+  # Wait for 'velocity' screen PID to exit
+  wait_on_screen velocity
+}
+
 # Enable debug mode
 DEBUG="${DEBUG:-false}"
 if [ "$DEBUG" = "true" ]; then
-  echo "[DEBUG] Running entrypoint script at $(which entrypoint.sh)"
+  echo "[DEBUG]: Running entrypoint script at $(which entrypoint.sh)"
   sleep 0.2
   set -ux
 fi
 
-# Settings
-FILE="${FILE:-/app/server.properties}"
-EULAFILE="${EULAFILE:-/app/eula.txt}"
-PREFIX="${PREFIX:-SETTINGS_}"
-JVM_OPTS="${JVM_OPTS:--Xms1G -Xmx2G}"
-
-# Set EULA
-sed -i.bak "s/^eula=.*\$/eula=${EULA:-false}/" "$EULAFILE"
-diff --unified=1 "${EULAFILE}.bak" "$EULAFILE"
-rm "${EULAFILE}.bak"
-
-# Update server.properties using env
-while IFS='=' read -r ENVVAR VALUE ; do
-  if echo "$ENVVAR" | grep -q "^${PREFIX}.*$"; then
-    KEY="${ENVVAR#"$PREFIX"}"
-    if ! grep -q "^${KEY}=" "$FILE"; then
-      echo "[WARN]: \"$KEY\" does not exist in $FILE and was not updated"
-    else
-      [ "$DEBUG" = "true" ] && echo "[DEBUG] Updating \"$KEY\" to \"$VALUE\""
-      sed -i.bak "s/^${KEY}=.*/${KEY}=${VALUE}/" "$FILE"
-      diff --unified=1 "${FILE}.bak" "$FILE"
-      rm "${FILE}.bak"
-    fi
-  else
-    if [ "$DEBUG" = "true" ]; then
-      echo "[DEBUG] \"$ENVVAR\" doesn't have the prefix \"$PREFIX\""
-    fi
-  fi
-done < <(env)
-
-# Show server.properties in DEBUG mode
-if [ "$DEBUG" = "true" ]; then
-  echo "[DEBUG] Showing ${FILE}:"
-  cat "$FILE"
+# Start Velocity proxy if VELOCITY='true' otherwise start a Minecraft server
+VELOCITY="${VELOCITY:-false}"
+if [ "$VELOCITY" = "true" ]; then
+  # Start Velocity proxy
+  velocity_server
+else
+  # Start Minecraft
+  minecraft_server
 fi
 
-# Set up a SIGTERM signal trap to stop the server
-trap 'stop_server' SIGTERM
-
-# Run server in screen (without attaching)
-echo "[INFO] Starting Minecraft server"
-/usr/bin/screen -dmS minecraft -L \
-  bash -c "/usr/bin/java $JVM_OPTS -jar server.jar --nogui"
-
-# Get screen PID
-[ "$DEBUG" = "true" ] && screen -ls
-SCREEN_PID="$(
-  screen -ls | grep -oE '[0-9]+\.minecraft' | cut -d. -f1
-)"
-
-# Check screen PID
-if ! kill -0 "$SCREEN_PID" 2>/dev/null; then
-  echo "[ERROR] Cannot find Minecraft screen (PID: \"$SCREEN_PID\")"
-  exit 1
-fi
-
-# Output logs to stdout (touch in case slow to create)
-touch screenlog.0
-tail -f screenlog.0 &
-TAIL_PID="$!"
-
-# Wait for screen to exit
-strace -e exit -e signal=none -p "$SCREEN_PID" 2>/dev/null &
-STRACE_PID="$!"
-[ "$DEBUG" = "true" ] && ps aux
-wait "$STRACE_PID"
+# Exit gracefully
+exit 0

scratch/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore