Initial commit

.dockerignore

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+Makefile

Dockerfile

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+FROM ghcr.io/archlinux/archlinux:latest
+LABEL org.opencontainers.image.authors="JeremyStarTM <jeremystartm@staropensource.de>"
+
+RUN pacman -Syu --noconfirm jre17-openjdk jre11-openjdk jre8-openjdk
+RUN mkdir /app
+RUN useradd -U -m mcserver
+ADD entrypoint.sh /app/entrypoint.sh
+
+STOPSIGNAL SIGTERM
+EXPOSE 25565 25565/tcp
+USER mcserver:mcserver
+ENTRYPOINT ["/sbin/bash", "/app/entrypoint.sh"]

Makefile

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+.PHONY: dist help build test
+
+dist: help
+help:
+	@echo "make help  [Displays help]"
+	@echo "     build [Builds the docker image]"
+	@echo "     test  [Tests the docker image]"
+	@echo "     clean [Cleans the docker build cache]"
+build:
+	docker buildx build --progress tty --tag mcserverdocker:repobuild .
+clean:
+	docker buildx prune --all --force
+test:
+	docker run mcserverdocker:repobuild

README.md

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+# MCServerDocker
+Runs a Minecraft Server inside a docker container.
+
+# Java Edition only
+This only supports the true version of Minecraft, not that phone and console spinoff named "Bedrock Edition".

entrypoint.sh

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+#!/usr/sbin/env bash
+# Disables warning about echo not expanding escape sequences
+# shellcheck disable=SC2028
+
+function print_banner() {
+  echo "         ____     ____                                          ____                    __"
+  echo " /'\\_/\`\\/\\  _\`\\  /\\  _\`\\                                       /\\  _\`\\                 /\\ \\"
+  echo "/\\      \\ \\ \\/\\_\\\\ \\,\\L\\_\\     __   _ __   __  __     __   _ __\\ \\ \\/\\ \\    ___     ___\\ \\ \\/'\\      __   _ __"
+  echo "\\ \\ \\__\\ \\ \\ \\/_/_\\/_\\__ \\   /'__\`\\/\\\`'__\\/\\ \\/\\ \\  /'__\`\\/\\\`'__\\ \\ \\ \\ \\  / __\`\\  /'___\\ \\ , <    /'__\`\\/\\\`'__\\"
+  echo " \\ \\ \\_/\\ \\ \\ \\L\\ \\ /\\ \\L\\ \\/\\  __/\\ \\ \\/ \\ \\ \\_/ |/\\  __/\\ \\ \\/ \\ \\ \\_\\ \\/\\ \\L\\ \\/\\ \\__/\\ \\ \\\\\`\\ /\\  __/\\ \\ \\/"
+  echo "  \\ \\_\\\\ \\_\\ \\____/ \\ \`\\____\\ \\____\\\\ \\_\\  \\ \\___/ \\ \\____\\\\ \\_\\  \\ \\____/\\ \\____/\\ \\____\\\\ \\_\\ \\_\\ \\____\\\\ \\_\\"
+  echo "   \\/_/ \\/_/\\/___/   \\/_____/\\/____/ \\/_/   \\/__/   \\/____/ \\/_/   \\/___/  \\/___/  \\/____/ \\/_/\\/_/\\/____/ \\/_/"
+}
+
+function initialize() {
+  echo ":: Initializing MCSD"
+  export "ARGS=--nogui "
+  if [ -z "${MCSD_ENFORCE_FRESH_CACHES}" ]; then
+    export "ARGS=${ARGS}--eraseCache "
+  fi
+  if [ -z "${MCSD_FORCE_UPGRADE}" ]; then
+    export "ARGS=${ARGS}--forceUpgrade "
+  fi
+  if [ -z "${MCSD_SAFEMODE}" ]; then
+    export "ARGS=${ARGS}--safeMode "
+  fi
+  if [ ! "${MCSD_AUTO_RESTART}" == "true" ] && [ ! "${MCSD_AUTO_RESTART}" == "false" ]; then
+    echo ":: Warning: No/Invalid auto restart value supplied, defaulting to false"
+    export "MCSD_AUTO_RESTART=false"
+  fi
+  if [ ! "${MCSD_JAVA_VERSION}" == "17" ] && [ ! "${MCSD_JAVA_VERSION}" == "11" ] && [ ! "${MCSD_JAVA_VERSION}" == "8" ]; then
+    echo ":: Warning: No/Invalid java version supplied, defaulting to java version 17"
+    export "MCSD_JAVA_VERSION=17"
+  fi
+}
+
+function check() {
+  echo ":: Checking environment"
+  if [ ! -d "/data" ]; then
+    echo ":: Error: Could not locate /data directory"
+    exit 1
+  fi
+  if [ ! -f "/data/server.jar" ]; then
+    echo ":: Error: Could not locate server.jar"
+    exit 1
+  fi
+}
+
+function run() {
+  echo ":: Starting server"
+  # We want to use ${ARGS} without using parenthesis
+  # shellcheck disable=SC2086
+  "/usr/lib/jvm/java-${MCSD_JAVA_VERSION}-openjdk/bin/java" -jar "/data/server.jar" ${ARGS}
+  export "exitcode=${?}"
+  # yes it is assigned you idiot
+  # shellcheck disable=SC2154
+  if [ "${exitcode}" == "0" ]; then
+    echo ":: The server was shut down successfully"
+  else
+    echo ":: The server was forcefully shut down (code ${exitcode})"
+  fi
+  case "${MCSD_AUTO_RESTART}" in
+    "true")
+      echo ":: Restarting server after shutdown"
+      run
+      ;;
+    "false")
+      echo ":: Ending execution"
+      exit 0
+      ;;
+    *)
+      echo ":: An internal error occured (run function, can't decide MCSD_AUTO_RESTART)"
+      ;;
+    esac
+}
+
+function main() {
+  print_banner
+  initialize
+  check
+  run
+}
+
+main