Fixed attempted rsync when WORLD not set

.circleci/config.yml

@@ -1,25 +0,0 @@
-version: 2
-jobs:
-  minecraft_server:
-    docker:
-      - image: circleci/buildpack-deps:stable
-    steps:
-      - checkout
-      - setup_remote_docker
-      - run:
-          name: Build image
-          command: docker build -t itzg/minecraft-server:${CIRCLE_BRANCH} .
-#      - run:
-#          name: Build arm v7 image
-#          command: docker build -t itzg/minecraft-server:${CIRCLE_BRANCH}-arm-v7 --platform linux/arm/v7 --build-arg ARCH=armv7 .
-
-workflows:
-  version: 2
-  build:
-    jobs:
-      - minecraft_server:
-          filters:
-            branches:
-              ignore:
-                - armv7
-                - multiarch

Dockerfile

@@ -1,4 +1,4 @@
-FROM adoptopenjdk/openjdk8-openj9:alpine
+FROM openjdk:8u212-jre-alpine
 
 LABEL maintainer "itzg"
 
@@ -67,7 +67,7 @@ COPY log4j2.xml /tmp/log4j2.xml
 WORKDIR /data
 
 ENV UID=1000 GID=1000 \
-  MEMORY="1G" \
+  JVM_XX_OPTS="-XX:+UseG1GC" MEMORY="1G" \
   TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED SPONGEBRANCH=STABLE SPONGEVERSION= FABRICVERSION=LATEST LEVEL=world \
   PVP=true DIFFICULTY=easy ENABLE_RCON=true RCON_PORT=25575 RCON_PASSWORD=minecraft \
   LEVEL_TYPE=DEFAULT SERVER_PORT=25565 ONLINE_MODE=TRUE SERVER_NAME="Dedicated Server" \

README.md

@@ -1046,14 +1046,6 @@ via a `JVM_XX_OPTS` environment variable.
 For some cases, if e.g. after removing mods, it could be necessary to startup minecraft with an additional `-D` parameter like `-Dfml.queryResult=confirm`. To address this you can use the environment variable `JVM_DD_OPTS`, which builds the params from a given list of values separated by space, but without the `-D` prefix. To make things running under systems (e.g. Plesk), which doesn't allow `=` inside values, a `:` (colon) could be used instead. The upper example would look like this:
 `JVM_DD_OPTS=fml.queryResult:confirm`, and will be converted to `-Dfml.queryResult=confirm`.
 
-The container uses [OpenJ9](https://www.eclipse.org/openj9/docs) and a couple of J9 options are
-simplified by environment variables:
-
-- `-e TUNE_VIRTUALIZED=TRUE` : enables the option to 
-  [optimize for virtualized environments](https://www.eclipse.org/openj9/docs/xtunevirtualized/)
-- `-e TUNE_NURSERY_SIZES=TRUE` : configures nursery sizes where the initial size is 50%
-  of the `MAX_MEMORY` and the max size is 80%.
-
 ### Enable Remote JMX for Profiling
 
 To enable remote JMX, such as for profiling with VisualVM or JMC, add the environment variable `ENABLE_JMX=true` and add a port forwarding of TCP port 7091, such as:

start-finalSetupWorld

@@ -10,7 +10,7 @@ else
   worldDest=/data/$LEVEL
 fi
 
-if [[ "$WORLD" ]] &&  isTrue "${FORCE_WORLD_COPY}" || [ ! -d "$worldDest" ]; then
+if [[ "$WORLD" ]] && ( isTrue "${FORCE_WORLD_COPY}" || [ ! -d "$worldDest" ] ); then
   if isURL $WORLD; then
     curl -fsSL "$WORLD" -o /tmp/world.zip
     zipSrc=/tmp/world.zip

start-minecraftFinalSetup

@@ -88,23 +88,6 @@ if [ -n "$JVM_DD_OPTS" ]; then
       done
 fi
 
-if isTrue ${TUNE_VIRTUALIZED}; then
-  JVM_XX_OPTS="${JVM_XX_OPTS} -Xtune:virtualized"
-fi
-
-if isTrue ${TUNE_NURSERY_SIZES}; then
-  case ${MAX_MEMORY^^} in
-    *G)
-      MAX_MEMORY_MB=$(( ${MAX_MEMORY%?} * 1024 )) ;;
-    *M)
-      MAX_MEMORY_MB=${MAX_MEMORY%?} ;;
-  esac
-
-  NURSERY_MINIMUM=$(( ${MAX_MEMORY_MB} / 2 ))
-  NURSERY_MAXIMUM=$(( ${MAX_MEMORY_MB} * 4/5 ))
-  JVM_XX_OPTS="${JVM_XX_OPTS} -Xmns${NURSERY_MINIMUM}M -Xmnx${NURSERY_MAXIMUM}M"
-fi
-
 if isTrue ${ENABLE_JMX}; then
   : ${JMX_HOST:=0.0.0.0}
   : ${JMX_PORT:=7091}