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49
docker/shulker/Dockerfile
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49
docker/shulker/Dockerfile
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# Build Shulker without modifying the submodule; run as non-root; persist config and read logs via volumes
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FROM node:22-alpine AS build
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WORKDIR /app
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# Enable corepack so yarn is available (Node 18+)
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RUN corepack enable
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# Copy only dependency manifests first for better layer caching
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COPY external/shulker/package.json external/shulker/yarn.lock ./external/shulker/
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WORKDIR /app/external/shulker
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# Install dependencies
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RUN yarn install --frozen-lockfile || yarn install
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# Copy source and build
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COPY external/shulker/ /app/external/shulker/
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RUN yarn build
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FROM node:22-alpine
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WORKDIR /app
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# Copy built app from builder
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COPY --from=build /app/external/shulker /app
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# Prepare runtime directories and non-root user
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RUN adduser -D -h /app -u 10001 shulker \
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&& mkdir -p /data /minecraft/logs \
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&& chown -R shulker:shulker /app /data /minecraft
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# Copy entrypoint
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COPY docker/shulker/entrypoint.sh /entrypoint.sh
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RUN chmod +x /entrypoint.sh
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# Install helpful runtime tools
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RUN apk add --no-cache jq
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USER shulker
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# Shulker default port
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EXPOSE 8000
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# Volumes: /data holds config.json, /minecraft/logs maps to the server logs
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VOLUME ["/data", "/minecraft/logs"]
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ENTRYPOINT ["/entrypoint.sh"]
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CMD ["node", "build/index.js"]
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90
docker/shulker/entrypoint.sh
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90
docker/shulker/entrypoint.sh
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#!/bin/sh
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set -e
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# If no config exists in /data, seed it from the example and apply env overrides if provided
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if [ ! -f /data/config.json ]; then
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echo "Seeding /data/config.json from example"
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cp /app/config.example.json /data/config.json
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fi
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# Ensure LOCAL_FILE_PATH points to the mounted logs unless explicitly overridden via env
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if [ -z "${LOCAL_FILE_PATH_OVERRIDE}" ]; then
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LOCAL_FILE_PATH="/minecraft/logs/latest.log"
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else
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LOCAL_FILE_PATH="${LOCAL_FILE_PATH_OVERRIDE}"
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fi
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# Apply a few common ENV overrides into config.json if provided
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json_set() {
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KEY="$1"; VALUE="$2"; FILE="$3"
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# Use jq if available for robust edits; otherwise sed fallback
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if command -v jq >/dev/null 2>&1; then
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tmp=$(mktemp)
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jq --arg v "$VALUE" ".[$KEY]=$VALUE" "$FILE" > "$tmp" && mv "$tmp" "$FILE" || true
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else
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# naive sed replace; expects simple string or number values already present
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sed -i "s#\(\"$KEY\"\): .*#\\\"$KEY\\\": $VALUE,#" "$FILE" || true
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fi
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}
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# Build a small jq script to apply overrides
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if command -v jq >/dev/null 2>&1; then
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jq \
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--argfile cfg /data/config.json \
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'.' >/dev/null 2>&1 || true
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fi
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# When env vars are set, write them. Values must be valid JSON literals (strings quoted).
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[ -n "${DISCORD_TOKEN}" ] && jq ".DISCORD_TOKEN=\"${DISCORD_TOKEN}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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[ -n "${DISCORD_CHANNEL_ID}" ] && jq ".DISCORD_CHANNEL_ID=\"${DISCORD_CHANNEL_ID}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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[ -n "${WEBHOOK_URL}" ] && jq ".WEBHOOK_URL=\"${WEBHOOK_URL}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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[ -n "${DISCORD_MESSAGE_TEMPLATE}" ] && jq ".DISCORD_MESSAGE_TEMPLATE=\"${DISCORD_MESSAGE_TEMPLATE}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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[ -n "${DEBUG}" ] && jq ".DEBUG=${DEBUG}" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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# Default behavior: if no WEBHOOK_URL, disable webhooks; otherwise enable them.
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# If USE_WEBHOOKS is explicitly set via env, it overrides this default.
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if [ -z "${USE_WEBHOOKS}" ]; then
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if jq -e '.WEBHOOK_URL and (.WEBHOOK_URL | length) > 0' /data/config.json >/dev/null 2>&1; then
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jq ".USE_WEBHOOKS=true" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json
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else
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jq ".USE_WEBHOOKS=false" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json
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fi
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else
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case "${USE_WEBHOOKS}" in
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[Tt][Rr][Uu][Ee]|1|yes|on) jq ".USE_WEBHOOKS=true" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json ;;
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[Ff][Aa][Ll][Ss][Ee]|0|no|off) jq ".USE_WEBHOOKS=false" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json ;;
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esac
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fi
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# Customize server identity shown in Discord when posting server messages via webhook
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[ -n "${SERVER_NAME}" ] && jq ".SERVER_NAME=\"${SERVER_NAME}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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[ -n "${SERVER_IMAGE}" ] && jq ".SERVER_IMAGE=\"${SERVER_IMAGE}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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# RCON configuration overrides
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[ -n "${MINECRAFT_SERVER_RCON_IP}" ] && jq ".MINECRAFT_SERVER_RCON_IP=\"${MINECRAFT_SERVER_RCON_IP}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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if [ -n "${MINECRAFT_SERVER_RCON_PORT}" ]; then
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case "${MINECRAFT_SERVER_RCON_PORT}" in
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''|*[!0-9]*) jq ".MINECRAFT_SERVER_RCON_PORT=\"${MINECRAFT_SERVER_RCON_PORT}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json ;;
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*) jq ".MINECRAFT_SERVER_RCON_PORT=${MINECRAFT_SERVER_RCON_PORT}" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json ;;
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esac
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fi
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[ -n "${MINECRAFT_SERVER_RCON_PASSWORD}" ] && jq ".MINECRAFT_SERVER_RCON_PASSWORD=\"${MINECRAFT_SERVER_RCON_PASSWORD}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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# Minecraft output formatting overrides
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if [ -n "${MINECRAFT_TELLRAW_DOESNT_EXIST}" ]; then
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case "${MINECRAFT_TELLRAW_DOESNT_EXIST}" in
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[Tt][Rr][Uu][Ee]|1|yes|on) jq ".MINECRAFT_TELLRAW_DOESNT_EXIST=true" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json ;;
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[Ff][Aa][Ll][Ss][Ee]|0|no|off) jq ".MINECRAFT_TELLRAW_DOESNT_EXIST=false" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json ;;
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esac
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fi
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[ -n "${MINECRAFT_TELLRAW_TEMPLATE}" ] && jq ".MINECRAFT_TELLRAW_TEMPLATE=\"${MINECRAFT_TELLRAW_TEMPLATE}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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[ -n "${MINECRAFT_TELLRAW_DOESNT_EXIST_SAY_TEMPLATE}" ] && jq ".MINECRAFT_TELLRAW_DOESNT_EXIST_SAY_TEMPLATE=\"${MINECRAFT_TELLRAW_DOESNT_EXIST_SAY_TEMPLATE}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json || true
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# Always set IS_LOCAL_FILE true and path to mounted logs unless overridden explicitly via env IS_LOCAL_FILE
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if [ -z "${IS_LOCAL_FILE}" ]; then IS_LOCAL_FILE=true; fi
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jq ".IS_LOCAL_FILE=${IS_LOCAL_FILE} | .LOCAL_FILE_PATH=\"${LOCAL_FILE_PATH}\"" /data/config.json > /data/config.json.tmp && mv /data/config.json.tmp /data/config.json
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# Link config into app directory where shulker expects it
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ln -sf /data/config.json /app/config.json
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exec "$@"
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