Merge branch 'master' into java8-multiarch

# Conflicts: # start-minecraftFinalSetup
Added option for MOHIST_BUILD
2026-02-17 15:13:55 +00:00 · 2021-02-27 20:52:36 -06:00 · 2021-02-27 20:37:59 -06:00 · 2021-02-27 16:58:25 -06:00 · 2021-02-27 11:05:16 -06:00 · 2021-02-25 19:07:16 -06:00
56 changed files with 1305 additions and 570 deletions
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,6 @@
 data
+testdata
 examples
 k8s-examples
 .idea
-.git
+.git
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,2 +1,4 @@
 [start-*]
-indent_size = 2
+indent_size = 2
+indent_style = space
+end_of_line = lf
--- a/.github/workflows/build-multiarch.yml
+++ b/.github/workflows/build-multiarch.yml
@@ -0,0 +1,82 @@
+name: Build and publish multiarch
+on:
+  push:
+    branches:
+      - multiarch
+      - java8-multiarch
+      - multiarch-latest
+      - java15
+      - test/multiarch/*
+    tags:
+      - "[0-9]+.[0-9]+.[0-9]+-multiarch"
+      - "[0-9]+.[0-9]+.[0-9]+-multiarch-latest"
+      - "[0-9]+.[0-9]+.[0-9]+-java15"
+
+jobs:
+  docker-buildx:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.2.0
+
+      - name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=itzg/minecraft-server
+          VERSION=edge
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          fi
+          if [[ $GITHUB_REF == refs/heads/* ]]; then
+            VERSION=${GITHUB_REF#refs/heads/}
+            if [[ $VERSION == master ]]; then
+              VERSION=latest
+            fi
+          fi
+          TAGS="${DOCKER_IMAGE}:${VERSION//\//-}"
+          echo ::set-output name=tags::${TAGS}
+          echo ::set-output name=cache_from::${TAGS}
+          echo ::set-output name=version::${VERSION//\//-}
+          echo ::set-output name=cache_version::${VERSION//\//-}
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ steps.prep.outputs.cache_version }}-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-${{ steps.prep.outputs.cache_version }}-
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.prep.outputs.tags }}
+          # ensure latest base image is used
+          pull: true
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+          labels: |
+            org.opencontainers.image.documentation=https://github.com/itzg/docker-minecraft-server
+            org.opencontainers.image.source=https://github.com/itzg/docker-minecraft-server
+            org.opencontainers.image.version=${{ steps.prep.outputs.version }}
+            org.opencontainers.image.revision=${{ github.sha }}
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,32 +4,94 @@ on:
  push:
    branches:
      - master
+      - java8
      - openj9
-      - openj9-nightly
+      - openj9-11
      - adopt11
-      - adopt13
+      - test/*
    tags:
      - "[0-9]+.[0-9]+.[0-9]+"
+      - "[0-9]+.[0-9]+.[0-9]+-java8"
      - "[0-9]+.[0-9]+.[0-9]+-openj9"
+      - "[0-9]+.[0-9]+.[0-9]+-openj9-11"
      - "[0-9]+.[0-9]+.[0-9]+-openj9-nightly"
      - "[0-9]+.[0-9]+.[0-9]+-adopt11"
-      - "[0-9]+.[0-9]+.[0-9]+-adopt13"

 jobs:
+  test:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Run tests
+        run: |
+          tests/test.sh
  build:
-    runs-on: ubuntu-latest
+    needs:
+      - test
+    runs-on: ubuntu-20.04

    steps:
    - uses: actions/checkout@v2

-    - name: Build and push Docker images
-      uses: docker/build-push-action@v1.1.0
+    - name: Prepare
+      id: prep
+      run: |
+        DOCKER_IMAGE=itzg/minecraft-server
+        VERSION=edge
+        if [[ $GITHUB_REF == refs/tags/* ]]; then
+          VERSION=${GITHUB_REF#refs/tags/}
+        fi
+        if [[ $GITHUB_REF == refs/heads/* ]]; then
+          VERSION=${GITHUB_REF#refs/heads/}
+          if [[ $VERSION == master ]]; then
+            VERSION=latest
+          fi
+        fi
+        TAGS="${DOCKER_IMAGE}:${VERSION//\//-}"
+        echo ::set-output name=tags::${TAGS}
+        echo ::set-output name=cache_from::${TAGS}
+        echo ::set-output name=version::${VERSION//\//-}
+        echo ::set-output name=cache_version::${VERSION//\//-}
+
+    - name: Setup Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Cache Docker layers
+      uses: actions/cache@v2
+      with:
+        path: /tmp/.buildx-cache
+        key: ${{ runner.os }}-buildx-${{ steps.prep.outputs.cache_version }}-${{ github.sha }}
+        restore-keys: |
+          ${{ runner.os }}-buildx-${{ steps.prep.outputs.cache_version }}-
+          ${{ runner.os }}-buildx-
+
+    - name: Login to DockerHub
+      uses: docker/login-action@v1
      with:
-        repository: itzg/minecraft-server
        username: ${{ secrets.DOCKER_USER }}
        password: ${{ secrets.DOCKER_PASSWORD }}
-        tag_with_ref: true
-        tag_with_sha: false
-        cache_froms: itzg/minecraft-server:latest
-        add_git_labels: true
+
+    - name: Build and push
+      id: docker_build
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: ./Dockerfile
+        # ensure latest base image is used
+        pull: true
+        # publish
        push: true
+        # tags determined by prep step
+        tags: ${{ steps.prep.outputs.tags }}
+        cache-from: type=local,src=/tmp/.buildx-cache
+        cache-to: type=local,dest=/tmp/.buildx-cache
+        labels: |
+          org.opencontainers.image.documentation=https://github.com/itzg/docker-minecraft-server
+          org.opencontainers.image.version=${{ steps.prep.outputs.version }}
+          org.opencontainers.image.source=https://github.com/itzg/docker-minecraft-server
+          org.opencontainers.image.revision=${{ github.sha }}
+
+    - name: Image digest
+      run: echo ${{ steps.docker_build.outputs.digest }}
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -1,19 +1,16 @@
-name: PR validation
+name: Validate PR

 on:
  pull_request:
    branches: [ master ]

 jobs:
-  build:
+  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

-      - name: Build Docker image
-        uses: docker/build-push-action@v1.1.0
-        with:
-          tag_with_sha: true
-          cache_froms: itzg/minecraft-server:latest
-          push: false
+      - name: Run tests
+        run: |
+          tests/test.sh
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -0,0 +1,11 @@
+Ensure buildx/BuildKit support is enabled and run:
+
+```shell script
+docker buildx build --platform=linux/arm64 --platform=linux/arm/v7 --platform=linux/amd64 --tag itzg/minecraft-server:multiarch --push .
+```
+
+To build for local testing, use:
+
+```shell script
+docker buildx build --platform=linux/amd64 --tag mc-multiarch --load .
+```
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -3,7 +3,7 @@
 Adding a new server `TYPE` can vary due to the complexity of obtaining and configuring each type; however, the addition of any server type includes at least the following steps:

 1. Copy an existing "start-deploy*" script, such as [start-deployMohist](start-deployMohist) and rename it accordingly making sure to retain the "start-deploy" prefix
-2. Modify the type-specific behavior between the "start-utils" preamble and the hand-off to `start-finalSetup01World` at the end of the script 
+2. Modify the type-specific behavior between the "start-utils" preamble and the hand-off to `start-finalSetupWorld` at the end of the script 
 3. Develop and test the changes using the [iterative process described below](#iterative-script-development)
 4. Add a case-entry to the `case "${TYPE^^}"` in [start-configuration](start-configuration)
 5. Add a section to the [README](README.md). It is recommended to copy-modify an existing section to retain a similar wording and level of detail
@@ -70,5 +70,5 @@ The multiarch images are built and published by [a Github action](https://github
 The following git command can be used to provide the bulk of release notes content:

 ```shell script
-git log --invert-grep --grep "^ci:" --grep "^misc:" --pretty="- %s" 1.1.0..1.2.0
+git log --invert-grep --grep "^ci:" --grep "^misc:" --grep "^docs:" --pretty="- %s" 1.1.0..1.2.0
 ```
--- a/66
+++ b/66
@@ -1,29 +1,29 @@
-FROM openjdk:8u212-jre-alpine
+FROM ubuntu:18.04

-LABEL maintainer "itzg"
+LABEL org.opencontainers.image.authors="Geoff Bourne <itzgeoff@gmail.com>"

-RUN apk add --no-cache -U \
-  openssl \
-  imagemagick \
-  lsof \
-  su-exec \
-  shadow \
-  bash \
-  curl iputils wget \
-  git \
-  jq \
-  mysql-client \
-  tzdata \
-  rsync \
-  nano \
-  sudo \
-  knock \
-  ttf-dejavu
+RUN apt-get update \
+  && DEBIAN_FRONTEND=noninteractive \
+  apt-get install -y \
+    openjdk-8-jre-headless \
+    imagemagick \
+    gosu \
+    sudo \
+    net-tools \
+    curl wget \
+    jq \
+    dos2unix \
+    mysql-client \
+    tzdata \
+    rsync \
+    nano \
+    unzip \
+    knockd \
+    ttf-dejavu \
+    && apt-get clean

-RUN addgroup -g 1000 minecraft \
-  && adduser -Ss /bin/false -u 1000 -G minecraft -h /home/minecraft minecraft \
-  && mkdir -m 777 /data \
-  && chown minecraft:minecraft /data /home/minecraft
+RUN addgroup --gid 1000 minecraft \
+  && adduser --system --shell /bin/false --uid 1000 --ingroup minecraft --home /data minecraft

 COPY files/sudoers* /etc/sudoers.d

@@ -31,9 +31,9 @@ EXPOSE 25565 25575

 # hook into docker BuildKit --platform support
 # see https://docs.docker.com/engine/reference/builder/#automatic-platform-args-in-the-global-scope
-ARG TARGETOS=linux
-ARG TARGETARCH=amd64
-ARG TARGETVARIANT=""
+ARG TARGETOS
+ARG TARGETARCH
+ARG TARGETVARIANT

 ARG EASY_ADD_VER=0.7.1
 ADD https://github.com/itzg/easy-add/releases/download/${EASY_ADD_VER}/easy-add_${TARGETOS}_${TARGETARCH}${TARGETVARIANT} /usr/bin/easy-add
@@ -52,7 +52,7 @@ RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
 --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz

 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
- --var version=1.4.3 --var app=mc-server-runner --file {{.app}} \
+ --var version=1.5.0 --var app=mc-server-runner --file {{.app}} \
 --from https://github.com/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz

 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
@@ -67,12 +67,12 @@ COPY log4j2.xml /tmp/log4j2.xml
 WORKDIR /data

 ENV UID=1000 GID=1000 \
-  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" \
-  REPLACE_ENV_VARIABLES="FALSE" ENV_VARIABLE_PREFIX="CFG_" \
-  ENABLE_AUTOPAUSE=false AUTOPAUSE_TIMEOUT_EST=3600 AUTOPAUSE_TIMEOUT_KN=120 AUTOPAUSE_TIMEOUT_INIT=600 AUTOPAUSE_PERIOD=10
+  MEMORY="1G" \
+  TYPE=VANILLA VERSION=LATEST \
+  ENABLE_RCON=true RCON_PORT=25575 RCON_PASSWORD=minecraft \
+  SERVER_PORT=25565 ONLINE_MODE=TRUE SERVER_NAME="Dedicated Server" \
+  ENABLE_AUTOPAUSE=false AUTOPAUSE_TIMEOUT_EST=3600 AUTOPAUSE_TIMEOUT_KN=120 AUTOPAUSE_TIMEOUT_INIT=600 \
+  AUTOPAUSE_PERIOD=10 AUTOPAUSE_KNOCK_INTERFACE=eth0

 COPY start* /
 COPY health.sh /
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/itzg/minecraft-server.svg)](https://hub.docker.com/r/itzg/minecraft-server/)
 [![Docker Stars](https://img.shields.io/docker/stars/itzg/minecraft-server.svg?maxAge=2592000)](https://hub.docker.com/r/itzg/minecraft-server/)
 [![GitHub Issues](https://img.shields.io/github/issues-raw/itzg/docker-minecraft-server.svg)](https://github.com/itzg/docker-minecraft-server/issues)
-[![Discord](https://img.shields.io/discord/660567679458869252)](https://discord.gg/DXfKpjB)
+[![Discord](https://img.shields.io/discord/660567679458869252?label=Discord&logo=discord)](https://discord.gg/DXfKpjB)
 [![Build and Publish](https://github.com/itzg/docker-minecraft-server/workflows/Build%20and%20Publish/badge.svg)](https://github.com/itzg/docker-minecraft-server/actions)
 [![](https://img.shields.io/badge/Donate-Buy%20me%20a%20coffee-orange.svg)](https://www.buymeacoffee.com/itzg)

@@ -11,7 +11,7 @@ latest snapshot. See the _Versions_ section below for more information.

 To simply use the latest stable version, run

-    docker run -d -p 25565:25565 --name mc itzg/minecraft-server
+    docker run -d -p 25565:25565 --name mc -e EULA=TRUE itzg/minecraft-server

 where the standard server port, 25565, will be exposed on your host machine.

@@ -35,6 +35,7 @@ With that you can easily view the logs, stop, or re-start the container:
    docker stop mc

    docker start mc
+*Be sure to always include `-e EULA=TRUE` in your commands, as Mojang/Microsoft requires EULA acceptance.*

 ## Looking for a Bedrock Dedicated Server

@@ -115,8 +116,24 @@ to map a directory on your host machine to the container's `/data` directory, su

    docker run -d -v /path/on/host:/data ...

-When attached in this way you can stop the server, edit the configuration under your attached `/path/on/host`
-and start the server again with `docker start CONTAINERID` to pick up the new configuration.
+When attached in this way you can stop the server, edit the configuration under your attached `/path/on/host` and start the server again with `docker start CONTAINER_ID` to pick up the new configuration.
+
+As example, using Docker compose, create the following `docker-compose.yml` in its own directory and the container will automatically create/attach the relative directory `data` to the container:
+
+```yaml
+version: "3"
+
+services:
+  mc:
+    image: itzg/minecraft-server
+    ports:
+      - 25565:25565
+    environment:
+      EULA: "TRUE"
+    volumes:
+      # attach the relative directory 'data' to the container's /data path
+      - ./data:/data
+```

 ## Versions

@@ -143,20 +160,31 @@ the server jar remain in the `/data` directory. It is safe to remove those._

 To use a different version of Java, please use a docker tag to run your Minecraft server.

-| Tag name       | Description                                 | Linux        |
-| -------------- | ------------------------------------------- | ------------ |
-| latest         | **Default**. Uses Java version 8 update 212 | Alpine Linux |
-| adopt13        | Uses Java version 13 latest update          | Alpine Linux |
-| adopt11        | Uses Java version 11 latest update          | Alpine Linux |
-| openj9         | Uses Eclipse OpenJ9 JVM                     | Alpine Linux |
-| openj9-nightly | Uses Eclipse OpenJ9 JVM testing builds      | Alpine Linux |
-| multiarch      | Uses Java version 8 latest update           | Debian Linux |
+| Tag name       | Java version | Linux  | JVM Type | Architecture      |
+| -------------- | -------------|--------|----------|-------------------|
+| latest         | 11           | Alpine | Hotspot  | amd64             |
+| java8          | 8            | Alpine | Hotspot  | amd64             |
+| java8-multiarch | 8           | Debian | Hotspot  | amd64,arm64,armv7 |
+| java15         | 15           | Debian | Hotspot  | amd64,arm64,armv7 |
+| adopt11        | 11           | Alpine | Hotspot  | amd64             |
+| openj9         | 8            | Alpine | OpenJ9   | amd64             |
+| openj9-11      | 11           | Alpine | OpenJ9   | amd64             |
+| multiarch      | 11           | Debian | Hotspot  | amd64,arm64,armv7 |
+| multiarch-latest | 15+        | Debian | Hotspot  | amd64,arm64,armv7 |

-For example, to use a Java version 13:
+For example, to use Java version 15 on any supported architecture:

-    docker run --name mc itzg/minecraft-server:adopt13
+    docker run --name mc itzg/minecraft-server:java15

-Keep in mind that some versions of Minecraft server can't work on the newest versions of Java. Also, FORGE doesn't support openj9 JVM implementation.
+> Keep in mind that some versions of Minecraft server can't work on the newest versions of Java. Also, FORGE doesn't support openj9 JVM implementation.
+
+### Deprecated Image Tags
+
+The following image tags have been deprecated and are no longer receiving updates:
+- adopt13
+- adopt14
+- adopt15
+- openj9-nightly

 ## Healthcheck

@@ -176,22 +204,24 @@ You can also query the container's health in a script friendly way:
 healthy
 ```

-## Autopause (experimental)
+Some orchestration systems, such as Portainer, don't allow for disabling the default `HEALTHCHECK` declared by this image. In those cases you can approximate the disabling of healthchecks by setting the environment variable `DISABLE_HEALTHCHECK` to `true`.
+
+## Autopause

 ### Description

-> EXPERIMENTAL: this feature only works with default bridge networking using official Docker distributions. Host networking and container management software, such as Portainer, and NAS solutions do not seem to provide compatible networking.
-
 There are various bug reports on [Mojang](https://bugs.mojang.com) about high CPU usage of servers with newer versions, even with few or no clients connected (e.g. [this one](https://bugs.mojang.com/browse/MC-149018), in fact the functionality is based on [this comment in the thread](https://bugs.mojang.com/browse/MC-149018?focusedCommentId=593606&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-593606)).

 An autopause functionality has been added to this image to monitor whether clients are connected to the server. If for a specified time no client is connected, the Java process is stopped. When knocking on the server port (e.g. by the ingame Multiplayer server overview), the process is resumed. The experience for the client does not change.

 Of course, even loaded chunks are not ticked when the process is stopped.

-From the server's point of view, the pausing causes a single tick to take as long as the process is stopped, so the server watchdog might intervene after the process is continued, possibly forcing a container restart. To prevent this, ensure that the `max-tick-time` in the `server.properties` file is set correctly.
+From the server's point of view, the pausing causes a single tick to take as long as the process is stopped, so the server watchdog might intervene after the process is continued, possibly forcing a container restart. To prevent this, ensure that the `max-tick-time` in the `server.properties` file is set correctly. Non-vanilla versions might have their own configuration file, you might have to disable their watchdogs separately (e.g. PAPER Servers).

 On startup the `server.properties` file is checked and, if applicable, a warning is printed to the terminal. When the server is created (no data available in the persistent directory), the properties file is created with the Watchdog disabled.

+The utility used to wake the server (`knock(d)`) works at network interface level. So the correct interface has to be set using the `AUTOPAUSE_KNOCK_INTERFACE` variable when using non-default networking environments (e.g. host-networking, Portainer oder NAS solutions). See the description of the variable below.
+
 A starting, example compose file has been provided in [examples/docker-compose-autopause.yml](examples/docker-compose-autopause.yml).

 ### Enabling Autopause
@@ -202,7 +232,7 @@ Enable the Autopause functionality by setting:
 -e ENABLE_AUTOPAUSE=TRUE
 ```

-There are 4 more environment variables that define the behaviour:
+The following environment variables define the behaviour of auto-pausing:
 * `AUTOPAUSE_TIMEOUT_EST`, default `3600` (seconds)
 describes the time between the last client disconnect and the pausing of the process (read as timeout established)
 * `AUTOPAUSE_TIMEOUT_INIT`, default `600` (seconds)
@@ -211,6 +241,8 @@ describes the time between server start and the pausing of the process, when no
 describes the time between knocking of the port (e.g. by the main menu ping) and the pausing of the process, when no client connects inbetween (read as timeout knocked)
 * `AUTOPAUSE_PERIOD`, default `10` (seconds)
 describes period of the daemonized state machine, that handles the pausing of the process (resuming is done independently)
+* `AUTOPAUSE_KNOCK_INTERFACE`, default `eth0`
+<br>Describes the interface passed to the `knockd` daemon. If the default interface does not work, run the `ifconfig` command inside the container and derive the interface receiving the incoming connection from its output. The passed interface must exist inside the container. Using the loopback interface (`lo`) does likely not yield the desired results.

 ## Deployment Templates and Examples

@@ -223,14 +255,19 @@ describes period of the daemonized state machine, that handles the pausing of th

 The [examples directory](https://github.com/itzg/docker-minecraft-server/tree/master/examples) also provides examples of deploying the [itzg/minecraft-server](https://hub.docker.com/r/itzg/minecraft-server/) Docker image.

+### Amazon Web Services (AWS) Deployment
+
+If you're looking for a simple way to deploy this to the Amazon Web Services Cloud, check out the [Minecraft Server Deployment (CloudFormation) repository](https://github.com/vatertime/minecraft-spot-pricing). This repository contains a CloudFormation template that will get you up and running in AWS in a matter of minutes. Optionally it uses Spot Pricing so the server is very cheap, and you can easily turn it off when not in use.
+
 ## Running a Forge Server

-Enable Forge server mode by adding a `-e TYPE=FORGE` to your command-line.
-By default the container will run the `RECOMMENDED` version of [Forge server](http://www.minecraftforge.net/wiki/)
-but you can also choose to run a specific version with `-e FORGEVERSION=10.13.4.1448`.
+Enable [Forge server](http://www.minecraftforge.net/wiki/) mode by adding a `-e TYPE=FORGE` to your command-line.
+
+The overall version is specified by `VERSION`, [as described in the section above](#versions) and will run the recommended Forge version by default. You can also choose to run a specific Forge version with `FORGEVERSION`, such as `-e FORGEVERSION=14.23.5.2854`.

    $ docker run -d -v /path/on/host:/data \
-        -e TYPE=FORGE -e FORGEVERSION=10.13.4.1448 \
+        -e TYPE=FORGE \
+        -e VERSION=1.12.2 -e FORGEVERSION=14.23.5.2854 \
        -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server

 To use a pre-downloaded Forge installer, place it in the attached `/data` directory and
@@ -267,10 +304,20 @@ the `/path/on/host` folder contents look like:
 ├── ops.json
 ├── server.properties
 ├── whitelist.json
+├── worlds
+│   └── ... PLACE MAPS IN THEIR OWN FOLDERS HERE ...
 └── ...
 ```

-If you add mods while the container is running, you'll need to restart it to pick those
+Providing a presistent `/data` mount is a good idea, both to persist the game world and to allow for the manual configuration which is sometimes needed.
+
+For instance, imagine a scenario when the initial launch has completed, but you now want to change the worldmap for your server.  
+
+Assuming you have a shared directory to your container, you can then (after first launch) drag and drop your premade maps or worlds into the `\worlds\` directory.  **Note:** each world should be placed in its own folder under the `\worlds\` directory.  
+
+Once your maps are in the proper path, you can then specify which map the server uses by changing the `level-name` value in `server.properties` to match the name of your map.
+
+If you add mods or make changes to `server.properties` while the container is running, you'll need to restart it to pick those
 up:

    docker stop mc
@@ -283,12 +330,18 @@ or downloading a world with the `WORLD` option.

 There are two additional volumes that can be mounted; `/mods` and `/config`.
 Any files in either of these filesystems will be copied over to the main
-`/data` filesystem before starting Minecraft.
+`/data` filesystem before starting Minecraft. If you want old mods to be removed as the `/mods` content is updated, then add `-e REMOVE_OLD_MODS=TRUE`. If you are running a `BUKKIT` distribution this will affect all files inside the `plugins/` directory. You can fine tune the removal process by specifing the `REMOVE_OLD_MODS_INCLUDE` and `REMOVE_OLD_MODS_EXCLUDE` variables. By default everything will be removed. You can also specify the `REMOVE_OLD_MODS_DEPTH` (default 16) variable to only delete files up to a certain level.
+
+> For example: `-e REMOVE_OLD_MODS=TRUE -e REMOVE_OLD_MODS_INCLUDE="*.jar" -e REMOVE_OLD_MODS_DEPTH=1` will remove all old jar files that are directly inside the `plugins/` or `mods/` directory.

 This works well if you want to have a common set of modules in a separate
 location, but still have multiple worlds with different server requirements
 in either persistent volumes or a downloadable archive.

+You can specify the destination of the configs that are located inside the `/config` mount by setting the `COPY_CONFIG_DEST` variable. The configs are copied recursivly to the `/data/config` directory by default. If a file was updated directly inside the `/data/*` directoy and is newer than the file in the `/config/*` mount it will not be overriden.
+
+> For example: `-v ./config:/config -e COPY_CONFIG_DEST=/data` will allow you to copy over your `bukkit.yml` and so on directly into the server directory.
+
 ### Replacing variables inside configs

 Sometimes you have mods or plugins that require configuration information that is only available at runtime.
@@ -306,7 +359,7 @@ defined environment variables. Variables that you want to replace need to be wra
 inside `${YOUR_VARIABLE}` curly brackets and prefixed with a dollar sign. This is the regular
 syntax for enviromment variables inside strings or config files.

-Optionally you can also define a prefix to only match predefined enviroment variables.
+Optionally you can also define a prefix to only match predefined environment variables.

 `ENV_VARIABLE_PREFIX="CFG_"` <-- this is the default prefix

@@ -322,6 +375,14 @@ There are some limitations to what characters you can use.
 Variables will be replaced in files with the following extensions:
 `.yml`, `.yaml`, `.txt`, `.cfg`, `.conf`, `.properties`.

+Specific files can be excluded by listing their name (without path) in the variable `REPLACE_ENV_VARIABLES_EXCLUDES`.
+
+Paths can be excluded by listing them in the variable `REPLACE_ENV_VARIABLES_EXCLUDE_PATHS`. Path
+excludes are recursive. Here is an example:
+```
+REPLACE_ENV_VARIABLES_EXCLUDE_PATHS="/data/plugins/Essentials/userdata /data/plugins/MyPlugin"
+```
+
 Here is a full example where we want to replace values inside a `database.yml`.

 ```yml
@@ -380,7 +441,7 @@ secrets:
 The content of `db_password`:

    ug23u3bg39o-ogADSs
-
+    
 ## Running a Bukkit/Spigot server

 Enable Bukkit/Spigot server mode by adding a `-e TYPE=BUKKIT` or `-e TYPE=SPIGOT` to your command-line.
@@ -396,49 +457,11 @@ If you are hosting your own copy of Bukkit/Spigot you can override the download

 You can build spigot from source by adding `-e BUILD_FROM_SOURCE=true`

-You can install Bukkit plugins in two ways...
+If you have attached a host directory to the `/data` volume, then you can install plugins within the `plugins` subdirectory. You can also [attach a `/plugins` volume](#deploying-plugins-from-attached-volume). If you add plugins while the container is running, you'll need to restart it to pick those up.

-### Using the /data volume
+## Running a Paper server

-This is the easiest way if you are using a persistent `/data` mount.
-
-To do this, you will need to attach the container's `/data` directory
-(see "Attaching data directory to host filesystem”).
-Then, you can add plugins to the `/path/on/host/plugins` folder you chose. From the example above,
-the `/path/on/host` folder contents look like:
-
-```
-/path/on/host
-├── plugins
-│   └── ... INSTALL PLUGINS HERE ...
-├── ops.json
-├── server.properties
-├── whitelist.json
-└── ...
-```
-
-If you add plugins while the container is running, you'll need to restart it to pick those
-up:
-
-    docker stop mc
-    docker start mc
-
-### Using separate mounts
-
-This is the easiest way if you are using an ephemeral `/data` filesystem,
-or downloading a world with the `WORLD` option.
-
-There is one additional volume that can be mounted; `/plugins`.
-Any files in this filesystem will be copied over to the main
-`/data/plugins` filesystem before starting Minecraft.
-
-This works well if you want to have a common set of plugins in a separate
-location, but still have multiple worlds with different server requirements
-in either persistent volumes or a downloadable archive.
-
-## Running a PaperSpigot server
-
-Enable PaperSpigot server mode by adding a `-e TYPE=PAPER` to your command-line.
+Enable Paper server mode by adding a `-e TYPE=PAPER` to your command-line.

 By default the container will run the latest build of [Paper server](https://papermc.io/downloads)
 but you can also choose to run a specific build with `-e PAPERBUILD=205`.
@@ -447,52 +470,14 @@ but you can also choose to run a specific build with `-e PAPERBUILD=205`.
        -e TYPE=PAPER \
        -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server

-If you are hosting your own copy of PaperSpigot you can override the download URL with:
+If you are hosting your own copy of Paper you can override the download URL with:

 - -e PAPER_DOWNLOAD_URL=<url>

-You can install Bukkit plugins in two ways...
-
 An example compose file is provided at
 [examples/docker-compose-paper.yml](examples/docker-compose-paper.yml).

-### Using the /data volume
-
-This is the easiest way if you are using a persistent `/data` mount.
-
-To do this, you will need to attach the container's `/data` directory
-(see "Attaching data directory to host filesystem”).
-Then, you can add plugins to the `/path/on/host/plugins` folder you chose. From the example above,
-the `/path/on/host` folder contents look like:
-
-```
-/path/on/host
-├── plugins
-│   └── ... INSTALL PLUGINS HERE ...
-├── ops.json
-├── server.properties
-├── whitelist.json
-└── ...
-```
-
-If you add plugins while the container is running, you'll need to restart it to pick those
-up:
-
-    docker stop mc
-    docker start mc
-
-### Using separate mounts
-
-This is the easiest way if you are using an ephemeral `/data` filesystem,
-or downloading a world with the `WORLD` option.
-
-There is one additional volume that can be mounted; `/plugins`.
-Any files in this filesystem will be copied over to the main
-`/data/plugins` filesystem before starting Minecraft.
-
-This works well if you want to have a common set of plugins in a separate
-location, but still have multiple worlds with different server requirements
-in either persistent volumes or a downloadable archive.
+If you have attached a host directory to the `/data` volume, then you can install plugins via the `plugins` subdirectory. You can also [attach a `/plugins` volume](#deploying-plugins-from-attached-volume). If you add plugins while the container is running, you'll need to restart it to pick those up.

 ## Running a Tuinity server

@@ -502,6 +487,30 @@ A [Tuinity](https://github.com/Spottedleaf/Tuinity) server, which is a fork of P

 > **NOTE** only `VERSION=LATEST` is supported

+## Running a Purpur server
+
+A [Purpur](https://purpur.pl3x.net/) server, which is "a fork of Paper and Tuinity with the goal of providing new and interesting configuration options".
+
+    -e TYPE=PURPUR
+
+> NOTE: the `VERSION` variable is used to lookup a build of Purpur to download
+
+Extra variables:
+- `PURPUR_BUILD=LATEST` : set a specific Purpur build to use
+- `FORCE_REDOWNLOAD=false` : set to true to force the located server jar to be re-downloaded
+
+## Running a Yatopia server
+
+A [Yatopia](https://github.com/YatopiaMC/Yatopia) server, which is a "blazing fast Tuinity fork with best in class performance".
+
+    -e TYPE=YATOPIA
+
+> NOTE: the `VERSION` variable is used to locate the Yatopia version to download
+
+Extra variables:
+- `RELEASE=stable` : set to `stable` or `latest`
+- `FORCE_REDOWNLOAD=false` : set to true to force the located server jar to be re-downloaded
+
 ## Running a Magma server

 A [Magma](https://magmafoundation.org/) server, which is a combination of Forge and PaperMC, can be used with
@@ -519,6 +528,9 @@ A [Mohist](https://github.com/Mohist-Community/Mohist) server can be used with

 > **NOTE** there are limited base versions supported, so you will also need to  set `VERSION`, such as "1.12.2"

+By default the latest build will be used; however, a specific build number can be selected by setting `MOHIST_BUILD`, such as
+
+    -e VERSION=1.16.5 -e MOHIST_BUILD=374

 ## Running a Catserver type server

@@ -530,12 +542,12 @@ A [Catserver](http://catserver.moe/) type server can be used with

 ## Running a server with a Feed the Beast modpack

-> **NOTE** requires `itzg/minecraft-server:multiarch` image
+> **NOTE** requires one of the Debian based images listed in [the Java versions section](#running-minecraft-server-on-different-java-version).

 [Feed the Beast application](https://www.feed-the-beast.com/) modpacks are supported by using `-e TYPE=FTBA` (**note** the "A" at the end of the type). This server type will automatically take care of downloading and installing the modpack and appropriate version of Forge, so the `VERSION` does not need to be specified.

 ### Environment Variables:
- `FTB_MODPACK_ID`: **required**, the numerical ID of the modpack to install. The ID can be located by finding the modpack at [Neptune FTB](https://ftb.neptunepowered.org/) and using the "Pack ID"
+- `FTB_MODPACK_ID`: **required**, the numerical ID of the modpack to install. The ID can be located by [finding the modpack](https://www.feed-the-beast.com/modpack) and using the "ID" displayed next to the name
 - `FTB_MODPACK_VERSION_ID`: optional, the numerical Id of the version to install. If not specified, the latest version will be installed. The "Version ID" can be obtained by drilling into the Versions tab and clicking a specific version.

 ### Upgrading
@@ -579,6 +591,16 @@ The following example uses `/modpacks` as the container path as the pre-download
        -e CF_SERVER_MOD=/modpacks/SkyFactory_4_Server_4.1.0.zip \
        -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server

+#### Modpack data directory
+
+By default, CurseForge modpacks are expanded into the sub-directory `/data/FeedTheBeast` and executed from there. (The default location was chosen for legacy reasons, when Curse and FTB were maintained together.)
+
+The directory can be changed by setting `CF_BASE_DIR`, such as `-e CF_BASE_DIR=/data`.
+
+#### Buggy start scripts
+
+Some modpacks have buggy or overly complex start scripts. You can avoid using the bundled start script and use this image's standard server-starting logic by adding `-e USE_MODPACK_START_SCRIPT=false`.
+
 ### Fixing "unable to launch forgemodloader"

 If your server's modpack fails to load with an error [like this](https://support.feed-the-beast.com/t/cant-start-crashlanding-server-unable-to-launch-forgemodloader/6028/2):
@@ -606,29 +628,31 @@ Just change it with `SPONGEBRANCH`, such as:

 ## Running a Fabric Server

-Enable Fabric server mode by adding a `-e TYPE=FABRIC` to your command-line.
-By default the container will run the latest version of [Fabric server](http://fabricmc.net/use/)
-but you can also choose to run a specific version with `-e FABRICVERSION=0.5.0.32`.
+Enable [Fabric server](http://fabricmc.net/use/) mode by adding a `-e TYPE=FABRIC` to your command-line. By default, the container will run the latest version, but you can also choose to run a specific version with `VERSION`.

-    $ docker run -d -v /path/on/host:/data \
-        -e TYPE=FABRIC -e FABRICVERSION=0.5.0.32 \
-        -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
+```
+docker run -d -v /path/on/host:/data \
+    -e TYPE=FABRIC \
+    -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
+```

-To use a pre-downloaded Fabric installer, place it in the attached `/data` directory and
-specify the name of the installer file with `FABRIC_INSTALLER`, such as:
+A specific installer version can be requested using `FABRIC_INSTALLER_VERSION`. 

-    $ docker run -d -v /path/on/host:/data ... \
-        -e FABRIC_INSTALLER=fabric-installer-0.5.0.32.jar ...
+To use a pre-downloaded Fabric installer, place it in a directory attached into the container, such as the `/data` volume and specify the name of the installer file with `FABRIC_INSTALLER`, such as:

-To download a Fabric installer from a custom location, such as your own file repository, specify
-the URL with `FABRIC_INSTALLER_URL`, such as:
+```
+docker run -d -v /path/on/host:/data ... \
+    -e FABRIC_INSTALLER=fabric-installer-0.5.0.32.jar ...
+```

-    $ docker run -d -v /path/on/host:/data ... \
-        -e FORGE_INSTALLER_URL=http://HOST/fabric-installer-0.5.0.32.jar ...
+To download a Fabric installer from a custom location, such as your own file repository, specify the URL with `FABRIC_INSTALLER_URL`, such as:

-In both of the cases above, there is no need for the `VERSION` or `FABRICVERSION` variables.
+```
+docker run -d -v /path/on/host:/data ... \
+    -e FABRIC_INSTALLER_URL=http://HOST/fabric-installer-0.5.0.32.jar ...
+```

-In order to add mods, you have two options.
+In order to add mods, you have two options:

 ### Using the /data volume

@@ -670,6 +694,12 @@ This works well if you want to have a common set of modules in a separate
 location, but still have multiple worlds with different server requirements
 in either persistent volumes or a downloadable archive.

+## Deploying plugins from attached volume
+
+There is one additional volume that can be mounted; `/plugins`. Any files in this filesystem will be copied over to the main `/data/plugins` filesystem before starting Minecraft. Set `PLUGINS_SYNC_UPDATE=false` if you want files from `/plugins` to take precedence over newer files in `/data/plugins`.
+
+This works well if you want to have a common set of plugins in a separate location, but still have multiple worlds with different server requirements in either persistent volumes or a downloadable archive.
+
 ## Running with a custom server JAR

 If you would like to run a custom server JAR, set `-e TYPE=CUSTOM` and pass the custom server
@@ -702,16 +732,14 @@ every time you want to create new Minecraft server, you can now use

 ```
 minecraft-server:
+  image: itzg/minecraft-server
+
  ports:
    - "25565:25565"

  environment:
    EULA: "TRUE"

-  image: itzg/minecraft-server
-
-  container_name: mc
-
  tty: true
  stdin_open: true
  restart: always
@@ -773,12 +801,18 @@ To whitelist players for your Minecraft server, pass the Minecraft usernames sep

 If the `WHITELIST` environment variable is not used, any user can join your Minecraft server if it's publicly accessible.

+> NOTE: When `WHITELIST` is used the server property `white-list` will automatically get set to `true`.
+
+> By default, the players in `WHITELIST` are **added** to the final `whitelist.json` file by the Minecraft server. If you set `OVERRIDE_WHITELIST` to "true" then the `whitelist.json` file will be recreated on each server startup.
+
 ### Op/Administrator Players

 To add more "op" (aka adminstrator) users to your Minecraft server, pass the Minecraft usernames separated by commas via the `OPS` environment variable, such as

    docker run -d -e OPS=user1,user2 ...

+> By default, the players in `OPS` are **added** to the final `ops.json` file by the Minecraft server. If you set `OVERRIDE_OPS` to "true" then the `ops.json` file will be recreated on each server startup.
+
 ### Server icon

 A server icon can be configured using the `ICON` variable. The image will be automatically
@@ -786,6 +820,10 @@ downloaded, scaled, and converted from any other image format:

    docker run -d -e ICON=http://..../some/image.png ...

+The server icon which has been set doesn't get overridden by default. It can be changed and overridden by setting `OVERRIDE_ICON` to `TRUE`.
+
+    docker run -d -e ICON=http://..../some/other/image.png -e OVERRIDE_ICON=TRUE...
+
 ### Rcon

 To use rcon use the `ENABLE_RCON` and `RCON_PASSORD` variables.
@@ -909,7 +947,11 @@ It determines the server-side viewing distance.

 If you want to create the Minecraft level with a specific seed, use `SEED`, such as

-    docker run -d -e SEED=1785852800490497919 ...
+    -e SEED=1785852800490497919
+
+If using a negative value for the seed, make sure to quote the value such as:
+
+    -e SEED="-1785852800490497919"

 ### Game Mode

@@ -931,16 +973,13 @@ For example:

 The message of the day, shown below each server entry in the UI, can be changed with the `MOTD` environment variable, such as

-    docker run -d -e 'MOTD=My Server' ...
+    -e MOTD="My Server"

 If you leave it off, a default is computed from the server type and version, such as

    A Paper Minecraft Server powered by Docker

-when `TYPE` is `PAPER`. That way you can easily differentiate between several servers you may have started.
-
-_The example shows how to specify a server message of the day that contains spaces by putting quotes
-around the whole thing._
+That way you can easily differentiate between several servers you may have started.

 ### PVP Mode

@@ -952,7 +991,7 @@ environment variable set to `false`, such as
 ### Level Type and Generator Settings

 By default, a standard world is generated with hills, valleys, water, etc. A different level type can
-be configured by setting `LEVEL_TYPE` to an expected type, such as
+be configured by setting `LEVEL_TYPE` to an expected type, for example

 - DEFAULT
 - FLAT
@@ -960,6 +999,8 @@ be configured by setting `LEVEL_TYPE` to an expected type, such as
 - AMPLIFIED
 - CUSTOMIZED
 - BUFFET
+- BIOMESOP (Biomes O' Plenty for 1.12 and older)
+- BIOMESOPLENTY (Biomes O' Plenty for 1.15 and above)

 Descriptions are available at the [gamepedia](http://minecraft.gamepedia.com/Server.properties).

@@ -975,7 +1016,7 @@ For example (just the `-e` bits):

 You can set a link to a custom resource pack and set it's checksum using the `RESOURCE_PACK` and `RESOURCE_PACK_SHA1` options respectively, the default is blank:

-    docker run -d -e 'RESROUCE_PACK=http\://link.com/to/pack.zip?\=1' -e 'RESOURCE_PACK_SHA1=d5db29cd03a2ed055086cef9c31c252b4587d6d0'
+    docker run -d -e 'RESOURCE_PACK=http\://link.com/to/pack.zip?\=1' -e 'RESOURCE_PACK_SHA1=d5db29cd03a2ed055086cef9c31c252b4587d6d0'

 **NOTE:** `:` and `=` must be escaped using `\`. The checksum plain-text hexadecimal.

@@ -1013,6 +1054,9 @@ read-only volume attachment to ensure the clone source remains pristine.
 docker run ... -v $HOME/worlds:/worlds:ro -e WORLD=/worlds/basic
 ```

+### Overwrite world on start
+The world will only be downloaded or copied if it doesn't exist already. Set `FORCE_WORLD_COPY=TRUE` to force overwrite the world on every server start.
+
 ### Downloadable mod/plugin pack for Forge, Bukkit, and Spigot Servers

 Like the `WORLD` option above, you can specify the URL of a "mod pack"
@@ -1087,19 +1131,18 @@ is passed to `docker run`.

 ### Memory Limit

-By default, the image declares a Java initial and maximum memory limit of 1 GB. There are several
-ways to adjust the memory settings:
+By default, the image declares an initial and maximum Java memory-heap limit of 1 GB. There are several ways to adjust the memory settings:

- `MEMORY`, "1G" by default, can be used to adjust both initial (`Xms`) and max (`Xmx`)
-  memory settings of the JVM
- `INIT_MEMORY`, independently sets the initial heap size
- `MAX_MEMORY`, independently sets the max heap size
+- `MEMORY`: "1G" by default, can be used to adjust both initial (`Xms`) and max (`Xmx`) memory heap settings of the JVM
+- `INIT_MEMORY`: independently sets the initial heap size
+- `MAX_MEMORY`: independently sets the max heap size

-The values of all three are passed directly to the JVM and support format/units as
-`<size>[g|G|m|M|k|K]`. For example:
+The values of all three are passed directly to the JVM and support format/units as `<size>[g|G|m|M|k|K]`. For example:

    -e MEMORY=2G

+> NOTE: the settings above only set the Java **heap** limits. Memory resource requests and limits on the overall container should also account for non-heap memory usage. An extra 25% is [a general best practice](https://dzone.com/articles/best-practices-java-memory-arguments-for-container).
+
 ### JVM Options

 General JVM options can be passed to the Minecraft Server invocation by passing a `JVM_OPTS`
@@ -1111,9 +1154,11 @@ For some cases, if e.g. after removing mods, it could be necessary to startup mi

 ### 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:
+To enable remote JMX, such as for profiling with VisualVM or JMC, add the environment variable `ENABLE_JMX=true`, set `JMX_HOST` to the IP/host running the Docker container, and add a port forwarding of TCP port 7091, such as:

-    -e ENABLE_JMX=true -p 7091:7091
+```
+-e ENABLE_JMX=true -e JMX_HOST=$HOSTNAME -p 7091:7091
+```

 ### Enable Aikar's Flags

@@ -1144,6 +1189,10 @@ Some older versions (pre-1.14) of Spigot required `--noconsole` to be passed whe
 Some older servers get confused and think that the GUI interface is enabled. You can explicitly
 disable that by passing `-e GUI=FALSE`.

+### Stop Duration
+
+When the container is signalled to stop, the Minecraft process wrapper will attempt to send a "stop" command via RCON or console and waits for the process to gracefully finish. By defaul it waits 60 seconds, but that duration can be configured by setting the environment variable `STOP_DURATION` to the number of seconds.
+
 ## Running on RaspberryPi

 To run this image on a RaspberryPi 3 B+, 4, or newer, use the image tag
--- a/docker-versions-create.sh
+++ b/docker-versions-create.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 #set -x
 # Use this variable to indicate a list of branches that docker hub is watching
-branches_list=('openj9' 'openj9-nightly' 'adopt11' 'adopt13' 'multiarch')
+branches_list=('java8' 'java8-multiarch' 'openj9' 'openj9-11' 'adopt11' 'java15' 'multiarch' 'multiarch-latest')

 function TrapExit {
  echo "Checking out back in master"
--- a/docs/.gitkeep
+++ b/docs/.gitkeep
--- a/docs/start-script-flow.drawio.png
+++ b/docs/start-script-flow.drawio.png
--- a/examples/docker-compose-curseforge.yml
+++ b/examples/docker-compose-curseforge.yml
@@ -2,7 +2,7 @@ version: '3.2'

 services:
  mc:
-    image: itzg/minecraft-server
+    image: itzg/minecraft-server:java8
    volumes:
    - ./modpacks:/modpacks:ro
    environment:
--- a/examples/docker-compose-curseinstance.yml
+++ b/examples/docker-compose-curseinstance.yml
@@ -1,20 +0,0 @@
-version: "3.7"
-
-services:
-  mc:
-    image: itzg/minecraft-server
-    ports:
-      - 25565:25565
-    volumes:
-      # Attach .../Curse/Minecraft/Instances for use at /instances
-      - ./Instances:/instances:ro
-      # Attach /data as usual
-      - ./ServerData:/data
-    environment:
-      EULA: "TRUE"
-      # Modpacks generally need more memory, so let's give at 2 GB
-      MEMORY: 2G
-      # Use new CURSE_INSTANCE type
-      TYPE: CURSE_INSTANCE
-      # Reference directory of or full path to minecraftinstance.json
-      CURSE_INSTANCE_JSON: /instances/FTB Presents SkyFactory 3
--- a/examples/docker-compose-forge.yml
+++ b/examples/docker-compose-forge.yml
@@ -2,7 +2,7 @@ version: "3.7"

 services:
  mc:
-    image: itzg/minecraft-server
+    image: itzg/minecraft-server:java8
    ports:
    # expose the Minecraft server port outside of container
    - 25565:25565
--- a/examples/docker-compose-ftba.yml
+++ b/examples/docker-compose-ftba.yml
@@ -2,8 +2,8 @@ version: "3.7"

 services:
  mc:
-    # FTBA support is only available in multiarch image tag
-    image: itzg/minecraft-server:multiarch
+    # FTBA support is only available in non-Alpine images
+    image: itzg/minecraft-server:java8-multiarch
    ports:
      # expose the Minecraft server port outside of container
      - 25565:25565
--- a/examples/docker-compose-simple.yml
+++ b/examples/docker-compose-simple.yml
@@ -0,0 +1,12 @@
+version: "3"
+
+services:
+  mc:
+    image: itzg/minecraft-server
+    ports:
+      - 25565:25565
+    environment:
+      EULA: "TRUE"
+    volumes:
+      # attach the relative directory 'data' to the container's /data path
+      ./data:/data
--- a/examples/docker-compose-spongeforge.yml
+++ b/examples/docker-compose-spongeforge.yml
@@ -5,7 +5,7 @@ version: '3'

 services:
  minecraft:
-    image: itzg/minecraft-server
+    image: itzg/minecraft-server:java8
    ports:
      - "25565:25565"
    volumes:
--- a/examples/modpacks/README.md
+++ b/examples/modpacks/README.md
@@ -1,3 +1,3 @@
-Please server [modpacks downloaded from CurseForge](https://www.curseforge.com/minecraft/modpacks) in this directory.
+Place server [modpacks downloaded from CurseForge](https://www.curseforge.com/minecraft/modpacks) in this directory.

 The example [`docker-compose-curseforge.yml`](../docker-compose-curseforge.yml) references a modpack downloaded from <https://www.curseforge.com/minecraft/modpacks/skyfactory-4/files/2787018>.
--- a/files/autopause/autopause-daemon.sh
+++ b/files/autopause/autopause-daemon.sh
@@ -2,23 +2,48 @@

 . /autopause/autopause-fcns.sh

-. /start-utils
+. ${SCRIPTS:-/}start-utils

-sudo /usr/sbin/knockd -c /autopause/knockd-config.cfg -d
-if [ $? -ne 0 ] ; then
+
+autopause_error_loop() {
+  logAutopause "Available interfaces within the docker container:"
+  INTERFACES=$(echo /sys/class/net/*)
+  INTERFACES=${INTERFACES//\/sys\/class\/net\//}
+  logAutopause "  $INTERFACES"
+  logAutopause "Please set the environment variable AUTOPAUSE_KNOCK_INTERFACE to the interface that handles incoming connections."
+  logAutopause "If unsure which interface to choose, run the ifconfig command in the container."
+  logAutopause "Autopause failed to initialize. This log entry will be printed every 30 minutes."
  while :
  do
-    if [[ -n $(ps -o comm | grep java) ]] ; then
-      break
-    fi
-    sleep 0.1
+    sleep 1800
+    logAutopause "Autopause failed to initialize."
  done
+}
+
+# wait for java process to be started
+while :
+do
+  if java_process_exists ; then
+    break
+  fi
+  sleep 0.1
+done
+
+# check for interface existence
+if [[ -z "$AUTOPAUSE_KNOCK_INTERFACE" ]] ; then
+  logAutopause "AUTOPAUSE_KNOCK_INTERFACE variable must not be empty!"
+  autopause_error_loop
+fi
+if ! [[ -d "/sys/class/net/$AUTOPAUSE_KNOCK_INTERFACE" ]] ; then
+  logAutopause "Selected interface \"$AUTOPAUSE_KNOCK_INTERFACE\" does not exist!"
+  autopause_error_loop
+fi
+
+sudo /usr/sbin/knockd -c /tmp/knockd-config.cfg -d -i "$AUTOPAUSE_KNOCK_INTERFACE"
+if [ $? -ne 0 ] ; then
  logAutopause "Failed to start knockd daemon."
-  logAutopause "Possible cause: docker's host network mode."
-  logAutopause "Recreate without host mode or disable autopause functionality."
-  logAutopause "Stopping server."
-  killall -SIGTERM java
-  exit 1
+  logAutopause "Probable cause: Unable to attach to interface \"$AUTOPAUSE_KNOCK_INTERFACE\"."
+  autopause_error_loop
 fi

 STATE=INIT
--- a/files/autopause/autopause-fcns.sh
+++ b/files/autopause/autopause-fcns.sh
@@ -5,15 +5,19 @@ current_uptime() {
 }

 java_running() {
-  [[ $( ps -a -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^S.*$ ]]
+  [[ $( ps -ax -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^S.*$ ]]
+}
+
+java_process_exists() {
+  [[ -n "$(ps -ax -o comm | grep 'java')" ]]
 }

 rcon_client_exists() {
-  [[ -n "$(ps -a -o comm | grep 'rcon-cli')" ]]
+  [[ -n "$(ps -ax -o comm | grep 'rcon-cli')" ]]
 }

 mc_server_listening() {
-  [[ -n $(netstat -tln | grep "0.0.0.0:$SERVER_PORT" | grep LISTEN) ]]
+  [[ -n $(netstat -tln | grep -e "0.0.0.0:$SERVER_PORT" -e ":::$SERVER_PORT" | grep LISTEN) ]]
 }

 java_clients_connected() {
@@ -29,7 +33,7 @@ java_clients_connected() {
  # remember, that the host network mode does not work with autopause because of the knockd utility
  for (( i=0; i<${#connections[@]}; i++ ))
  do
-    if [[ ! $(echo "${connections[$i]}" | awk '{print $5}') =~ ^\s*127\.0\.0\.1:.*$ ]] ; then
+    if [[ ! $(echo "${connections[$i]}" | awk '{print $5}') =~ ^localhost$|^127(?:\.[0-9]+){0,2}\.[0-9]+$|^(?:0*\:)*?:?0*1$ ]] ; then
      # not localhost
      return 0
    fi
--- a/files/autopause/knockd-config.cfg
+++ b/files/autopause/knockd-config.cfg
@@ -3,10 +3,10 @@
 [unpauseMCServer-server]
 sequence = 25565
 seq_timeout = 1
- command = /sbin/su-exec minecraft:minecraft /autopause/resume.sh
+ command = /usr/sbin/gosu minecraft:minecraft /autopause/resume.sh
 tcpflags = syn
 [unpauseMCServer-rcon]
 sequence = 25575
 seq_timeout = 1
- command = /sbin/su-exec minecraft:minecraft /autopause/resume.sh
+ command = /usr/sbin/gosu minecraft:minecraft /autopause/resume.sh
 tcpflags = syn
--- a/files/autopause/pause.sh
+++ b/files/autopause/pause.sh
@@ -2,7 +2,7 @@

 . /start-utils

-if [[ $( ps -a -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^S.*$ ]] ; then
+if [[ $( ps -ax -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^S.*$ ]] ; then
  # save world
  rcon-cli save-all >/dev/null

@@ -17,5 +17,5 @@ if [[ $( ps -a -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^S.*$ ]] ; th

  # finally pause the process
  logAutopauseAction "Pausing Java process"
-  killall -q -STOP java
+  pkill -STOP java
 fi
--- a/files/autopause/resume.sh
+++ b/files/autopause/resume.sh
@@ -2,7 +2,7 @@

 . /start-utils

-if [[ $( ps -a -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^T.*$ ]] ; then
+if [[ $( ps -ax -o stat,comm | grep 'java' | awk '{ print $1 }') =~ ^T.*$ ]] ; then
  logAutopauseAction "Knocked, resuming Java process"
-  killall -q -CONT java
+  pkill -CONT java
 fi
--- a/files/sudoers-mc
+++ b/files/sudoers-mc
@@ -1,2 +1,2 @@
-%minecraft ALL=(ALL) NOPASSWD:/usr/bin/killall
+%minecraft ALL=(ALL) NOPASSWD:/usr/bin/pkill
 %minecraft ALL=(ALL) NOPASSWD:/usr/sbin/knockd
--- a/health.sh
+++ b/health.sh
@@ -2,7 +2,10 @@

 . ${SCRIPTS:-/}start-utils

-if isTrue "${ENABLE_AUTOPAUSE}" && [[ "$( ps -a -o stat,comm | grep 'java' | awk '{ print $1 }')" =~ ^T.*$ ]]; then
+if isTrue "${DISABLE_HEALTHCHECK}"; then
+  echo "Healthcheck disabled"
+  exit 0
+elif isTrue "${ENABLE_AUTOPAUSE}" && [[ "$( ps -ax -o stat,comm | grep 'java' | awk '{ print $1 }')" =~ ^T.*$ ]]; then
  echo "Java process suspended by Autopause function"
  exit 0
 else
--- a/7
+++ b/7
@@ -36,16 +36,11 @@ if [ $(id -u) = 0 ]; then
    chown -R ${runAsUser}:${runAsGroup} /data
  fi

-  if [[ $(stat -c "%u" /autopause) != $UID ]]; then
-    log "Changing ownership of /autopause to $UID ..."
-    chown -R ${runAsUser}:${runAsGroup} /autopause
-  fi
-
  if [[ ${SKIP_NSSWITCH_CONF^^} != TRUE ]]; then
    echo 'hosts: files dns' > /etc/nsswitch.conf
  fi

-  exec su-exec ${runAsUser}:${runAsGroup} ${SCRIPTS:-/}start-configuration $@
+  exec gosu ${runAsUser}:${runAsGroup} ${SCRIPTS:-/}start-configuration $@
 else
  exec ${SCRIPTS:-/}start-configuration $@
 fi
--- a/23
+++ b/23
@@ -4,18 +4,20 @@

 log "Autopause functionality enabled"

+cp /autopause/knockd-config.cfg /tmp/knockd-config.cfg
+
 # update server port to listen to
 regseq="^\s*sequence\s*=\s*$SERVER_PORT\s*$"
-linenum=$(grep -nm1 sequence /autopause/knockd-config.cfg | cut -d : -f 1 | tail -n1)
-if ! [[ $(awk "NR==$linenum" /autopause/knockd-config.cfg) =~ $regseq ]]; then
-  sed -i "${linenum}s/sequence.*/sequence = $SERVER_PORT/" /autopause/knockd-config.cfg
+linenum=$(grep -nm1 sequence /tmp/knockd-config.cfg | cut -d : -f 1 | tail -n1)
+if ! [[ $(awk "NR==$linenum" /tmp/knockd-config.cfg) =~ $regseq ]]; then
+  sed -i "${linenum}s/sequence.*/sequence = $SERVER_PORT/" /tmp/knockd-config.cfg
  log "Updated server port in knockd config"
 fi
 # update rcon port to listen to
 regseq="^\s*sequence\s*=\s*$RCON_PORT\s*$"
-linenum=$(grep -nm2 sequence /autopause/knockd-config.cfg | cut -d : -f 1 | tail -n1)
-if ! [[ $(awk "NR==$linenum" /autopause/knockd-config.cfg) =~ $regseq ]]; then
-  sed -i "${linenum}s/sequence.*/sequence = $RCON_PORT/" /autopause/knockd-config.cfg
+linenum=$(grep -nm2 sequence /tmp/knockd-config.cfg | cut -d : -f 1 | tail -n1)
+if ! [[ $(awk "NR==$linenum" /tmp/knockd-config.cfg) =~ $regseq ]]; then
+  sed -i "${linenum}s/sequence.*/sequence = $RCON_PORT/" /tmp/knockd-config.cfg
  log "Updated rcon port in knockd config"
 fi

@@ -44,10 +46,15 @@ if ! [[ $AUTOPAUSE_TIMEOUT_INIT =~ ^[0-9]+$ ]] ; then
  export AUTOPAUSE_TIMEOUT_INIT
  log "Warning: AUTOPAUSE_TIMEOUT_INIT is not numeric, set to 600 (seconds)"
 fi
+if [[ "$AUTOPAUSE_KNOCK_INTERFACE" == "lo" ]] ; then
+  log "Warning: AUTOPAUSE_KNOCK_INTERFACE is set to the local loopback interface."
+  log "         This is not advisable, as incoming connections are likely not picked up there."
+  log "         Continuing with this setting."
+fi

-if [[ -n $MAX_TICK_TIME ]] ; then
+if [[ -n "$MAX_TICK_TIME" && "$MAX_TICK_TIME" != "-1" ]] ; then
  log "Warning: MAX_TICK_TIME is non-default, for autopause to work properly, this check should be disabled (-1 for versions >= 1.8.1)"
-else
+elif [[ -z "$MAX_TICK_TIME" ]] ; then
  if versionLessThan 1.8.1; then
    # 10 years
    MAX_TICK_TIME=315360000000
--- a/70
+++ b/70
@@ -1,15 +1,22 @@
 #!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'

 . ${SCRIPTS:-/}start-utils

+: ${EULA:=}
+: ${PROXY:=}
+: ${RCON_PASSWORD_FILE:=}
+
 shopt -s nullglob

 #umask 002
 export HOME=/data

+log "Running as uid=$(id -u) gid=$(id -g) with /data as '$(ls -lnd /data)'"
+
 if [ ! -e /data/eula.txt ]; then
-  EULA="${EULA,,}"
-  if [ "$EULA" != "true" ]; then
+  if ! isTrue "$EULA"; then
    log ""
    log "Please accept the Minecraft EULA at"
    log "  https://account.mojang.com/documents/minecraft_eula"
@@ -19,24 +26,10 @@ if [ ! -e /data/eula.txt ]; then
    exit 1
  fi

-  echo "# Generated via Docker on $(date)" > /data/eula.txt
-
-  if ! echo "eula=$EULA" >> /data/eula.txt; then
-    log "ERROR: unable to write eula to /data. Please make sure attached directory is writable by uid=${UID}"
-    exit 2
-  fi
+  writeEula
 fi


-log "Running as uid=$(id -u) gid=$(id -g) with /data as '$(ls -lnd /data)'"
-
-if ! touch /data/.verify_access; then
-  log "ERROR: /data doesn't seem to be writable. Please make sure attached directory is writable by uid=$(id -u)"
-  exit 2
-fi
-
-rm /data/.verify_access || true
-
 if [[ $PROXY ]]; then
    export http_proxy="$PROXY"
    export https_proxy="$PROXY"
@@ -45,7 +38,22 @@ if [[ $PROXY ]]; then
    sleep 5
 fi

-export SERVER_PROPERTIES=/data/server.properties
+if [[ $RCON_PASSWORD_FILE ]]; then
+    log ""
+    if [ ! -e ${RCON_PASSWORD_FILE} ]; then
+	log "Initial RCON password file ${RCON_PASSWORD_FILE} does not seems to exist."
+	log "Please ensure your configuration."
+	log "If you are using Docker Secrets feature, please check this for further information: "
+	log " https://docs.docker.com/engine/swarm/secrets"
+	log ""
+	exit 1
+    else
+	RCON_PASSWORD=$(cat ${RCON_PASSWORD_FILE})
+	export RCON_PASSWORD
+    fi
+    log ""
+fi
+
 export VERSIONS_JSON=https://launchermeta.mojang.com/mc/game/version_manifest.json

 case "X$VERSION" in
@@ -55,11 +63,8 @@ case "X$VERSION" in
  XSNAPSHOT|Xsnapshot)
    VANILLA_VERSION=$(curl -fsSL $VERSIONS_JSON | jq -r '.latest.snapshot')
  ;;
-  X[1-9]*)
-    VANILLA_VERSION=$VERSION
-  ;;
  *)
-    VANILLA_VERSION=$(curl -fsSL $VERSIONS_JSON | jq -r '.latest.release')
+    VANILLA_VERSION=$VERSION
  ;;
 esac
 export VANILLA_VERSION
@@ -95,8 +100,12 @@ case "${TYPE^^}" in
    exec ${SCRIPTS:-/}start-deployFabric "$@"
  ;;

-  FTB|CURSEFORGE)
-    exec ${SCRIPTS:-/}start-deployFTB "$@"
+  FTBA)
+    exec ${SCRIPTS:-/}start-deployFTBA "$@"
+  ;;
+
+  CURSEFORGE|FTB)
+    exec ${SCRIPTS:-/}start-deployCF "$@"
  ;;

  VANILLA)
@@ -127,10 +136,19 @@ case "${TYPE^^}" in
    exec ${SCRIPTS:-/}start-deployCatserver "$@"
  ;;

+  PURPUR)
+    exec ${SCRIPTS:-/}start-deployPurpur "$@"
+  ;;
+
+  YATOPIA)
+    exec ${SCRIPTS:-/}start-deployYatopia "$@"
+  ;;
+
  *)
      log "Invalid type: '$TYPE'"
-      log "Must be: VANILLA, FORGE, BUKKIT, SPIGOT, PAPER, FTBA, CURSEFORGE, SPONGEVANILLA,"
-      log "         CUSTOM, CURSE_INSTANCE, MAGMA, MOHIST, CATSERVER"
+      log "Must be: VANILLA, FORGE, BUKKIT, SPIGOT, PAPER, FTBA (multiarch-only),"
+      log "         CURSE_INSTANCE, CURSEFORGE, SPONGEVANILLA, TUINITY, PURPUR"
+      log "         CUSTOM, MAGMA, MOHIST, CATSERVER, YATOPIA"
      exit 1
  ;;

--- a/56
+++ b/56
@@ -1,6 +1,7 @@
 #!/bin/bash

 . ${SCRIPTS:-/}start-utils
+isDebugging && set -x

 set -e

@@ -58,12 +59,24 @@ function downloadSpigot {
      ;;
  esac

+  if [[ ${VERSION^^} = LATEST ]]; then
+    VANILLA_VERSION=$(restify https://getbukkit.org/download/spigot --attribute='property=og:title' | jq -r '.[0] | .attributes | select(.property == "og:title") | .content | split(" ") | .[-1]')
+  fi
+
  if [[ -z $downloadUrl ]]; then
    downloadUrl="https://cdn.getbukkit.org/${getbukkitFlavor}/${getbukkitFlavor}-${VANILLA_VERSION}.jar"
  fi

+  setServerVar
+  if [ -f $SERVER ]; then
+    # tell curl to only download when newer
+    curlArgs="-z $SERVER"
+  fi
+  if isDebugging; then
+    curlArgs="$curlArgs -v"
+  fi
  log "Downloading $match from $downloadUrl ..."
-  curl -fsSL -o $SERVER "$downloadUrl"
+  curl -fsSL -o $SERVER $curlArgs "$downloadUrl"
  if [[ $? != 0 || $(grep -c "DOCTYPE html" $SERVER) != 0 ]]; then
    cat <<EOF

@@ -72,6 +85,13 @@ ERROR: failed to download from $downloadUrl
       exact version, such as 1.4.6-R0.4-SNAPSHOT or 1.8-R0.1-SNAPSHOT-LATEST

 EOF
+
+    if isDebugging && [[ $(grep -c "DOCTYPE html" $SERVER) != 0 ]]; then
+      cat $SERVER
+    fi
+
+    # remove invalid download
+    rm $SERVER
    exit 3
  fi

@@ -79,22 +99,24 @@ EOF
  export JVM_OPTS
 }

+function setServerVar {
+  case "$TYPE" in
+    *BUKKIT|*bukkit)
+      export SERVER=craftbukkit_server-${VANILLA_VERSION}.jar
+      ;;
+    *)
+      export SERVER=spigot_server-${VANILLA_VERSION}.jar
+      ;;
+  esac
+}

-case "$TYPE" in
-  *BUKKIT|*bukkit)
-    export SERVER=craftbukkit_server-${VANILLA_VERSION}.jar
-    ;;
-  *)
-    export SERVER=spigot_server-${VANILLA_VERSION}.jar
-    ;;
-esac
-
-if [ ! -f $SERVER ] || [ -n "$FORCE_REDOWNLOAD" ]; then
-   if isTrue "$BUILD_SPIGOT_FROM_SOURCE" || isTrue "$BUILD_FROM_SOURCE"; then
-     buildSpigotFromSource
-   else
-     downloadSpigot
-   fi
+if isTrue "$BUILD_SPIGOT_FROM_SOURCE" || isTrue "$BUILD_FROM_SOURCE"; then
+  setServerVar
+  if [ ! -f $SERVER ] || [ -n "$FORCE_REDOWNLOAD" ]; then
+    buildSpigotFromSource
+  fi
+else
+  downloadSpigot
 fi

 # Normalize on Spigot for operations below
@@ -102,4 +124,4 @@ export TYPE=SPIGOT
 export SKIP_LOG4J_CONFIG=true

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/91
+++ b/91
@@ -1,26 +1,83 @@
 #!/bin/bash

-. ${SCRIPTS:-/}start-utils
+set -e

-export FTB_BASE_DIR=/data/FeedTheBeast
-legacyJavaFixerUrl=http://ftb.cursecdn.com/FTB2/maven/net/minecraftforge/lex/legacyjavafixer/1.0/legacyjavafixer-1.0.jar
-export TYPE=FEED-THE-BEAST
+. ${SCRIPTS:-/}start-utils
+isDebugging && set -x
+
+: ${FTB_BASE_DIR:=${CF_BASE_DIR:-/data/FeedTheBeast}}
+export FTB_BASE_DIR
+
+legacyJavaFixerUrl=https://ftb.forgecdn.net/FTB2/maven/net/minecraftforge/lex/legacyjavafixer/1.0/legacyjavafixer-1.0.jar
+export TYPE=CURSEFORGE

 FTB_SERVER_MOD=${FTB_SERVER_MOD:-$CF_SERVER_MOD}

 log "Looking for Feed-The-Beast / CurseForge server modpack."
-if [[ -z $FTB_SERVER_MOD ]]; then
-    log "Environment variable FTB_SERVER_MOD not set."
-    log "Set FTB_SERVER_MOD to the file name of the FTB server modpack."
-    log "(And place the modpack in the /data directory.)"
+requireVar FTB_SERVER_MOD
+
+if ! isTrue ${USE_MODPACK_START_SCRIPT:-true}; then
+  if ! [ -f "${FTB_SERVER_MOD}" ]; then
+    log "ERROR unable to find requested modpack file ${FTB_SERVER_MOD}"
    exit 2
+  fi
+
+  needsInstall=true
+  installMarker=/data/.curseforge-installed
+  if [ -f $installMarker ]; then
+    if [ "$(cat $installMarker)" != "${FTB_SERVER_MOD}" ]; then
+      log "Upgrading modpack"
+
+      serverJar=$(find ${FTB_BASE_DIR} -not -name "forge*installer.jar" -name "forge*.jar")
+      if [[ "${serverJar}" ]]; then
+        rm -rf $(dirname "${serverJar}")/{mods,*.jar,libraries,resources,scripts,config}
+      fi
+    else
+      needsInstall=false
+    fi
+  fi
+
+  if $needsInstall; then
+    log "Unpacking FTB server modpack ${FTB_SERVER_MOD} ..."
+    mkdir -p ${FTB_BASE_DIR}
+    unzip -o "${FTB_SERVER_MOD}" -d ${FTB_BASE_DIR} | awk '{printf "."} END {print ""}'
+
+    serverJar=$(find ${FTB_BASE_DIR}  -path "*/libraries/*" -prune -type f -o  -not -name "forge*installer.jar" -name "forge*.jar")
+    if [[ -z "$serverJar" ]]; then
+      forgeInstallerJar=$(find ${FTB_BASE_DIR} -name "forge*installer.jar")
+      if [[ -z "${forgeInstallerJar}" ]]; then
+        log "ERROR Unable to find forge installer in modpack."
+        log "      Make sure you downloaded the server files."
+        exit 2
+      fi
+
+      log "Installing forge server"
+      (cd $(dirname "${forgeInstallerJar}"); java -jar $(basename "${forgeInstallerJar}") --installServer) | awk '{printf "."} END {print ""}'
+    fi
+
+    echo "${FTB_SERVER_MOD}" > $installMarker
+  fi
+
+  export SERVER=$(find ${FTB_BASE_DIR}  -path "*/libraries/*" -prune -type f -o  -not -name "forge*installer.jar" -name "forge*.jar")
+  if [[ -z "${SERVER}" || ! -f "${SERVER}" ]]; then
+    log "ERROR unable to locate installed forge server jar"
+    isDebugging && find ${FTB_BASE_DIR} -name "forge*.jar"
+    exit 2
+  fi
+
+  export FTB_DIR=$(dirname "${SERVER}")
+
+  exec ${SCRIPTS:-/}start-finalSetupWorld $@
 fi

 entryScriptExpr="
  -name ServerStart.sh
+  -o -name serverstart.sh
  -o -name ServerStartLinux.sh
  -o -name LaunchServer.sh
  -o -name server-start.sh
+  -o -name startserver.sh
+  -o -name StartServer.sh
  "

 if [[ -d ${FTB_BASE_DIR} ]]; then
@@ -38,7 +95,7 @@ fi
 # this allows saving just the world separate from the rest of the data directory
 if [[ $startScriptCount = 0 ]]; then
  srv_modpack=${FTB_SERVER_MOD}
-  if isURL ${srv_modpack}; then
+  if isURL "${srv_modpack}"; then
      case $srv_modpack in
        https://www.feed-the-beast.com/*/download|https://www.curseforge.com/minecraft/modpacks/*/download/*/file)
          ;;
@@ -56,19 +113,19 @@ if [[ $startScriptCount = 0 ]]; then
      fi
      srv_modpack=$downloaded
  fi
-  if [[ ${srv_modpack:0:5} == "data/" ]]; then
+  if [[ "${srv_modpack:0:5}" == "data/" ]]; then
      # Prepend with "/"
-      srv_modpack=/${srv_modpack}
+      srv_modpack="/${srv_modpack}"
  fi
-  if [[ ! ${srv_modpack:0:1} == "/" ]]; then
+  if [[ ! "${srv_modpack:0:1}" == "/" ]]; then
      # If not an absolute path, assume file is in "/data"
      srv_modpack=/data/${srv_modpack}
  fi
-  if [[ ! -f ${srv_modpack} ]]; then
+  if [[ ! -f "${srv_modpack}" ]]; then
      log "FTB server modpack ${srv_modpack} not found."
      exit 2
  fi
-  if [[ ! ${srv_modpack: -4} == ".zip" ]]; then
+  if [[ ! "${srv_modpack: -4}" == ".zip" ]]; then
      log "FTB server modpack ${srv_modpack} is not a zip archive."
      log "Please set FTB_SERVER_MOD to a file with a .zip extension."
      exit 2
@@ -76,7 +133,7 @@ if [[ $startScriptCount = 0 ]]; then

  log "Unpacking FTB server modpack ${srv_modpack} ..."
  mkdir -p ${FTB_BASE_DIR}
-  unzip -o ${srv_modpack} -d ${FTB_BASE_DIR} | awk '{printf "."} END {print ""}'
+  unzip -o "${srv_modpack}" -d ${FTB_BASE_DIR} | awk '{printf "."} END {print ""}'
 fi

 if [[ $(find ${FTB_BASE_DIR} $entryScriptExpr | wc -l) = 0 ]]; then
@@ -114,7 +171,7 @@ export FTB_SERVER_START=$(find "${FTB_BASE_DIR}" $entryScriptExpr)

 export FTB_DIR=$(dirname "${FTB_SERVER_START}")
 chmod a+x "${FTB_SERVER_START}"
-grep fml.queryResult=confirm ${FTB_SERVER_START} > /dev/null || \
+grep fml.queryResult=confirm "${FTB_SERVER_START}" > /dev/null || \
    sed -i 's/-jar/-Dfml.queryResult=confirm -jar/' "${FTB_SERVER_START}"
 sed -i 's/.*read.*Restart now/#\0/' "${FTB_SERVER_START}"
 legacyJavaFixerPath="${FTB_DIR}/mods/legacyjavafixer.jar"
@@ -135,4 +192,4 @@ elif [ -e "${FTB_DIR}/Install.sh" ]; then
 fi

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/2
+++ b/2
@@ -29,4 +29,4 @@ fi
 export SKIP_LOG4J_CONFIG=true

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World "$@"
+exec ${SCRIPTS:-/}start-finalSetupWorld "$@"
--- a/8
+++ b/8
@@ -17,15 +17,19 @@ if isURL ${CUSTOM_SERVER}; then
  fi

 elif [[ -f ${CUSTOM_SERVER} ]]; then
-  log "Using custom server jar at ${CUSTOM_SERVER} ..."
+  export SERVER=${CUSTOM_SERVER}
+
+elif [[ ${GENERIC_PACK} ]]; then
+  log "Using custom server jar from generic pack at ${CUSTOM_SERVER} ..."
  export SERVER=${CUSTOM_SERVER}

 else
  log "CUSTOM_SERVER is not properly set to a URL or existing jar file"
  exit 2
+
 fi

 export SKIP_LOG4J_CONFIG=true

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/75
+++ b/75
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+ftbInstallMarker=".ftb-installed"
+
+. ${SCRIPTS:-/}start-utils
+isDebugging && set -x
+set -e
+
+if ! [[ -v FTB_MODPACK_ID ]]; then
+  log "ERROR FTB_MODPACK_ID is required with TYPE=FTB"
+  exit 1
+fi
+
+if ! [[ ${FTB_MODPACK_ID} =~ [0-9]+ ]]; then
+  log "ERROR FTB_MODPACK_ID needs to be numeric"
+  exit 1
+fi
+
+if ! [[ -v FTB_MODPACK_VERSION_ID ]]; then
+  if ! FTB_MODPACK_VERSION_ID=$(curl -fsSL https://api.modpacks.ch/public/modpack/${FTB_MODPACK_ID} | jq -r '.versions | sort_by(.updated)[-1].id'); then
+    log "ERROR unable to resolve latest modpack version ID for modpack ${FTB_MODPACK_ID}"
+    exit 1
+  fi
+elif ! [[ ${FTB_MODPACK_VERSION_ID} =~ [0-9]+ ]]; then
+  log "ERROR FTB_MODPACK_VERSION_ID needs to be numeric"
+  exit 1
+fi
+
+if ! [ -f "${ftbInstallMarker}" ] || [ $(cat "${ftbInstallMarker}") != "${FTB_MODPACK_ID}=${FTB_MODPACK_VERSION_ID}" ]; then
+  ftbInstaller=/data/ftb-installer
+  if ! [[ -f "${ftbInstaller}" ]]; then
+    log "Downloading FTB installer"
+    curl -fsSL https://api.modpacks.ch/public/modpack/1/1/server/linux -o "${ftbInstaller}"
+    chmod +x "${ftbInstaller}"
+  fi
+
+  rm -rf forge*jar mods config libraries defaultconfigs changelogs
+
+  log "Installing modpack ID ${FTB_MODPACK_ID}, version ID ${FTB_MODPACK_VERSION_ID}"
+  ${ftbInstaller} ${FTB_MODPACK_ID} ${FTB_MODPACK_VERSION_ID} --noscript --auto
+  rm -f forge*installer.jar
+
+  echo "${FTB_MODPACK_ID}=${FTB_MODPACK_VERSION_ID}" > ${ftbInstallMarker}
+
+  writeEula
+
+  # some modpacks result in --w----r-- permissions
+  chmod a+r version.json
+else
+  log "FTB modpack ID ${FTB_MODPACK_ID}, version ID ${FTB_MODPACK_VERSION_ID} is ready to go"
+fi
+
+isDebugging && cat version.json
+forgeVersion=$(jq -r '.targets|unique[] | select(.name == "forge") | .version' version.json)
+mcVersion=$(jq -r '.targets|unique[] | select(.name == "minecraft") | .version' version.json)
+
+variants=(
+  forge-${mcVersion}-${forgeVersion}.jar
+  forge-${mcVersion}-${forgeVersion}-universal.jar
+  forge-${mcVersion}-${forgeVersion}-${mcVersion}-universal.jar
+)
+for f in ${variants[@]}; do
+  if [ -f $f ]; then
+    export SERVER=$f
+    break
+  fi
+done
+if ! [ -v SERVER ]; then
+  log "ERROR unable to locate the installed forge server jar"
+  ls *.jar
+  exit 2
+fi
+
+# Continue to Final Setup
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/26
+++ b/26
@@ -7,36 +7,34 @@ export TYPE=FABRIC

 FABRIC_INSTALLER=${FABRIC_INSTALLER:-}
 FABRIC_INSTALLER_URL=${FABRIC_INSTALLER_URL:-}
-FABRICVERSION=${FABRICVERSION:-LATEST}
+FABRIC_INSTALLER_VERSION=${FABRIC_INSTALLER_VERSION:-${FABRICVERSION:-LATEST}}
 if [[ -z $FABRIC_INSTALLER && -z $FABRIC_INSTALLER_URL ]]; then
  log "Checking Fabric version information."
-  case $FABRICVERSION in
+  case $FABRIC_INSTALLER_VERSION in
    LATEST)
-      FABRIC_VERSION=$(maven-metadata-release https://maven.fabricmc.net/net/fabricmc/fabric-installer/maven-metadata.xml)
-      ;;
-
-    *)
-      FABRIC_VERSION=$FABRICVERSION
+      FABRIC_INSTALLER_VERSION=$(maven-metadata-release https://maven.fabricmc.net/net/fabricmc/fabric-installer/maven-metadata.xml)
      ;;
  esac

-  FABRIC_INSTALLER="/tmp/fabric-installer-$FABRIC_VERSION.jar"
+  FABRIC_INSTALLER="/tmp/fabric-installer-${FABRIC_INSTALLER_VERSION}.jar"
+  markerVersion=$FABRIC_INSTALLER_VERSION

 elif [[ -z $FABRIC_INSTALLER ]]; then
  FABRIC_INSTALLER="/tmp/fabric-installer.jar"
+  markerVersion=custom
 elif [[ ! -e $FABRIC_INSTALLER ]]; then
  log "ERROR: the given Fabric installer doesn't exist : $FABRIC_INSTALLER"
  exit 2
 fi

-installMarker="/data/.fabric-installed-${VANILLA_VERSION}-${FABRIC_VERSION:-manual}"
+installMarker="/data/.fabric-installed-${VANILLA_VERSION}-${markerVersion}"

 debug Checking for installMarker ${installMarker}
 if [[ ! -e $installMarker ]]; then
  if [[ ! -e $FABRIC_INSTALLER ]]; then
    if [[ -z $FABRIC_INSTALLER_URL ]]; then
-      log "Downloading $FABRIC_VERSION"
-      downloadUrl="https://maven.fabricmc.net/net/fabricmc/fabric-installer/$FABRIC_VERSION/fabric-installer-$FABRIC_VERSION.jar"
+      log "Downloading installer version $FABRIC_INSTALLER_VERSION"
+      downloadUrl="https://maven.fabricmc.net/net/fabricmc/fabric-installer/${FABRIC_INSTALLER_VERSION}/fabric-installer-${FABRIC_INSTALLER_VERSION}.jar"
      log "...trying $downloadUrl"
      curl -o $FABRIC_INSTALLER -fsSL $downloadUrl
    else
@@ -49,9 +47,9 @@ if [[ ! -e $installMarker ]]; then
  fi

  if isDebugging; then
-    debug "Installing Fabric $FABRIC_VERSION using $FABRIC_INSTALLER with mcversion ${VANILLA_VERSION}"
+    debug "Installing Fabric ${VANILLA_VERSION} using $FABRIC_INSTALLER"
  else
-    log "Installing Fabric $FABRIC_VERSION using $FABRIC_INSTALLER"
+    log "Installing Fabric using $FABRIC_INSTALLER"
  fi
  tries=3
  set +e
@@ -75,4 +73,4 @@ else
 fi

 # Contineut to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/4
+++ b/4
@@ -1,8 +1,8 @@
 #!/bin/bash

 . ${SCRIPTS:-/}start-utils
-
 export TYPE=FORGE
+: ${FORGEVERSION:=RECOMMENDED}

 if [[ -z $FORGE_INSTALLER && -z $FORGE_INSTALLER_URL ]]; then
  norm=$VANILLA_VERSION
@@ -113,4 +113,4 @@ else
 fi

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/2
+++ b/2
@@ -15,4 +15,4 @@ fi
 export SKIP_LOG4J_CONFIG=true

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/11
+++ b/11
@@ -6,6 +6,7 @@ set -e
 isDebugging && set -x

 requireVar VANILLA_VERSION
+: ${MOHIST_BUILD:=lastSuccessfulBuild}

 mohistJobs=https://ci.codemc.io/job/Mohist-Community/job/
 mohistJob=${mohistJobs}Mohist-${VANILLA_VERSION}/
@@ -17,12 +18,12 @@ if ! curl -X HEAD -o /dev/null -fsSL "${mohistJob}"; then
  exit 1
 fi

-latestBuildRelPath=$(
-  curl -fsSL "${mohistJob}lastSuccessfulBuild/api/json" |
+buildRelPath=$(
+  curl -fsSL "${mohistJob}${MOHIST_BUILD}/api/json" |
    jq -r '.artifacts[0].relativePath'
 )

-baseName=$(basename "${latestBuildRelPath}")
+baseName=$(basename "${buildRelPath}")
 if [[ ${baseName} != *-server.jar* ]]; then
  log "ERROR: mohist build for ${VANILLA_VERSION} is not a valid server jar, found ${baseName}"
  log "       check https://ci.codemc.io/job/Mohist-Community/ for available versions"
@@ -34,10 +35,10 @@ export SERVER="/data/${baseName}"

 if [ ! -f ${SERVER} ]; then
  log "Downloading ${baseName}"
-  curl -o "${SERVER}" -fsSL "${mohistJob}lastSuccessfulBuild/artifact/${latestBuildRelPath}"
+  curl -o "${SERVER}" -fsSL "${mohistJob}${MOHIST_BUILD}/artifact/${buildRelPath}"
 fi

 export SKIP_LOG4J_CONFIG=true

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World "$@"
+exec ${SCRIPTS:-/}start-finalSetupWorld "$@"
--- a/80
+++ b/80
@@ -1,23 +1,79 @@
 #!/bin/bash

 . ${SCRIPTS:-/}start-utils
+set -o pipefail
+isDebugging && set -x

-: ${PAPERBUILD:=latest}
-export SERVER=paper_server-${VANILLA_VERSION}-${PAPERBUILD}.jar
+if [[ $PAPER_DOWNLOAD_URL ]]; then
+  export SERVER=$(getFilenameFromUrl "${PAPER_DOWNLOAD_URL}")

-if [ ! -f "$SERVER" ] || [ -n "$FORCE_REDOWNLOAD" ]; then
-    downloadUrl=${PAPER_DOWNLOAD_URL:-https://papermc.io/api/v1/paper/${VANILLA_VERSION}/${PAPERBUILD}/download}
-    log "Downloading Paper $VANILLA_VERSION (build $PAPERBUILD) from $downloadUrl ..."
-    curl -fsSL -o "$SERVER" "$downloadUrl"
-    if [ ! -f "$SERVER" ]; then
-      log "ERROR: failed to download from $downloadUrl (status=$?)"
-      exit 3
-    fi
+  if [ -f "$SERVER" ]; then
+    zarg=(-z "$SERVER")
+  fi
+
+  echo "Preparing custom PaperMC jar from $PAPER_DOWNLOAD_URL"
+
+  curl -fsSL -o "$SERVER" "${zarg[@]}" "${PAPER_DOWNLOAD_URL}"
+else
+  # PaperMC API v2 docs : https://papermc.io/api/docs/swagger-ui/index.html?configUrl=/api/openapi/swagger-config
+
+  build=${PAPERBUILD:=$(curl -fsSL "https://papermc.io/api/v2/projects/paper/versions/${VANILLA_VERSION}" -H  "accept: application/json" \
+   | jq '.builds[-1]')}
+  case $? in
+    0)
+      ;;
+    22)
+      versions=$(curl -fsSL "https://papermc.io/api/v2/projects/paper" -H  "accept: application/json")
+      if [[ $VERSION = LATEST ]]; then
+          VANILLA_VERSION=$(echo "$versions" | jq -r '.versions[-1]')
+          log "WARN: using ${VANILLA_VERSION} since that's the latest provided by PaperMC"
+          # re-execute the current script with the newly computed version
+          exec "$0" "$@"
+      fi
+      log "ERROR: ${VANILLA_VERSION} is not published by PaperMC"
+      log "       Set VERSION to one of the following: "
+      log "       $(echo "$versions" | jq -r '.versions | join(", ")')"
+      exit 1
+      ;;
+    *)
+      echo "ERROR: unknown error while looking up PaperMC version=${VANILLA_VERSION}"
+      exit 1
+      ;;
+  esac
+  if [ $? != 0 ]; then
+    echo "ERROR: failed to lookup PaperMC build from version ${VANILLA_VERSION}"
+    exit 1
+  fi
+
+  export SERVER=$(curl -fsSL "https://papermc.io/api/v2/projects/paper/versions/${VANILLA_VERSION}/builds/${build}" -H  "accept: application/json" \
+   | jq -r '.downloads.application.name')
+  if [ $? != 0 ]; then
+    echo "ERROR: failed to lookup PaperMC download file from version=${VANILLA_VERSION} build=${build}"
+    exit 1
+  fi
+
+  if [ -f "$SERVER" ]; then
+    zarg=(-z "$SERVER")
+  fi
+
+  log "Removing old PaperMC versions ..."
+  for f in paper-*.jar; do
+    [[ $f != $SERVER ]] && rm $f
+  done
+
+  log "Downloading PaperMC $VANILLA_VERSION (build $build) ..."
+  curl -fsSL -o "$SERVER" "${zarg[@]}" \
+    "https://papermc.io/api/v2/projects/paper/versions/${VANILLA_VERSION}/builds/${build}/downloads/${SERVER}" \
+    -H  "accept: application/java-archive"
+  if [ $? != 0 ]; then
+    echo "ERROR: failed to download PaperMC from version=${VANILLA_VERSION} build=${build} download=${SERVER}"
+    exit 1
+  fi
 fi

-# Normalize on Spigot for operations below
+# Normalize on Spigot for downstream operations
 export TYPE=SPIGOT
 export SKIP_LOG4J_CONFIG=true

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld "$@"
--- a/38
+++ b/38
@@ -0,0 +1,38 @@
+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'
+
+. ${SCRIPTS:-/}start-utils
+isDebugging && set -x
+
+: ${VANILLA_VERSION:?}
+: ${PURPUR_BUILD:=LATEST}
+: ${FORCE_REDOWNLOAD:=false}
+
+if [[ ${PURPUR_BUILD} == LATEST ]]; then
+  PURPUR_BUILD=$(curl -fsSL "https://purpur.pl3x.net/api/v1/purpur/${VANILLA_VERSION}" |
+    jq -r '.builds.latest' || echo "")
+  if [[ -z ${PURPUR_BUILD} ]]; then
+    log "ERROR: Failed to locate a Purpur build for ${VANILLA_VERSION}."
+    log "       Please check if a download is available at https://purpur.pl3x.net/downloads/"
+    exit 3
+  fi
+fi
+
+export SERVER="purpur-${VANILLA_VERSION}-${PURPUR_BUILD}.jar"
+
+if [ ! -f "$SERVER" ] || isTrue "$FORCE_REDOWNLOAD"; then
+    downloadUrl="https://purpur.pl3x.net/api/v1/purpur/${VANILLA_VERSION}/${PURPUR_BUILD}/download"
+    log "Downloading Purpur from $downloadUrl ..."
+    if ! curl -fsSL -o "$SERVER" "$downloadUrl"; then
+      log "ERROR: failed to download from $downloadUrl (status=$?)"
+      exit 3
+    fi
+fi
+
+# Normalize on Spigot for later operations
+export TYPE=SPIGOT
+export SKIP_LOG4J_CONFIG=true
+
+# Continue to Final Setup
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/4
+++ b/4
@@ -3,6 +3,8 @@
 . ${SCRIPTS:-/}start-utils

 export TYPE=spongevanilla
+: ${SPONGEBRANCH:=STABLE}
+: ${SPONGEVERSION:=}

 # Parse branch
 log "Choosing branch for Sponge"
@@ -36,4 +38,4 @@ if [ ! -e $SERVER ] || [ -n "$FORCE_REDOWNLOAD" ]; then
 fi

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/4
+++ b/4
@@ -20,8 +20,8 @@ if [ ! -f "$SERVER" ] || [ -n "$FORCE_REDOWNLOAD" ]; then
    fi
 fi

-# Normalize on Spigot for operations below
+# Normalize on Spigot for later operations
 export TYPE=SPIGOT

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/5
+++ b/5
@@ -26,6 +26,9 @@ if [ ! -e $SERVER ] || [ -n "$FORCE_REDOWNLOAD" ]; then
  if [ $result != 0 ]; then
    log "ERROR failed to obtain version manifest from $versionManifestUrl ($result)"
    exit 1
+  elif [ $serverDownloadUrl = null ]; then
+    log "ERROR version $VANILLA_VERSION does not provide a server download"
+    exit 1
  fi

  debug "Downloading server from $serverDownloadUrl"
@@ -43,4 +46,4 @@ fi
 isDebugging && ls -l

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World $@
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/30
+++ b/30
@@ -0,0 +1,30 @@
+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'
+
+. ${SCRIPTS:-/}start-utils
+isDebugging && set -x
+
+: ${VANILLA_VERSION:?}
+: ${RELEASE:=stable}
+: ${FORCE_REDOWNLOAD:=false}
+
+requireEnum RELEASE stable latest
+
+export SERVER="yatopia-${RELEASE}-${VANILLA_VERSION}.jar"
+
+if [ ! -f "$SERVER" ] || isTrue "$FORCE_REDOWNLOAD"; then
+    downloadUrl="https://api.yatopiamc.org/v2/${RELEASE}Build/download?branch=ver/${VANILLA_VERSION}"
+    log "Downloading Yatopia from $downloadUrl ..."
+    if ! curl -fsSL -o "$SERVER" "$downloadUrl"; then
+      log "ERROR: failed to download from $downloadUrl (status=$?)"
+      exit 3
+    fi
+fi
+
+# Normalize on Spigot for later operations
+export TYPE=SPIGOT
+export SKIP_LOG4J_CONFIG=true
+
+# Continue to Final Setup
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
--- a/28
+++ b/28
@@ -1,28 +0,0 @@
-#!/bin/bash
-
-. ${SCRIPTS:-/}start-utils
-
-if [ "${REPLACE_ENV_VARIABLES^^}" = "TRUE" ]; then
-  log "Replacing env variables in configs that match the prefix $ENV_VARIABLE_PREFIX..."
-  while IFS='=' read -r name value ; do
-    # check if name of env variable matches the prefix
-    # sanity check environment variables to avoid code injections
-    if [[ "$name" = $ENV_VARIABLE_PREFIX* ]] \
-        && [[ $value =~ ^[0-9a-zA-Z_:/=?.+\-]*$ ]] \
-        && [[ $name =~ ^[0-9a-zA-Z_\-]*$ ]]; then
-      # Read content from file environment
-      if [[ $name = *"_FILE" ]] && [[ -f $value ]]; then
-        name="${name/_FILE/}"
-        value=$(<$value)
-      fi
-
-      log "Replacing $name with $value ..."
-      find /data/ -type f \
-          \( -name "*.yml" -or -name "*.yaml" -or -name "*.txt" -or -name "*.cfg" \
-          -or -name "*.conf" -or -name "*.properties" \) \
-          -exec sed -i 's#${'"$name"'}#'"$value"'#g' {} \;
-    fi
-  done < <(env)
-fi
-
-exec ${SCRIPTS:-/}start-minecraftFinalSetup $@
--- a/51
+++ b/51
@@ -0,0 +1,51 @@
+#!/bin/bash
+
+. ${SCRIPTS:-/}start-utils
+
+: ${ENV_VARIABLE_PREFIX:=CFG_}
+
+if isTrue "${REPLACE_ENV_VARIABLES}"; then
+  log "Replacing env variables in configs that match the prefix $ENV_VARIABLE_PREFIX ..."
+
+  # File excludes
+  fileExcludes=
+  for f in ${REPLACE_ENV_VARIABLES_EXCLUDES}; do
+    fileExcludes="${fileExcludes} -not -name $f"
+  done
+
+  # Directory excludes (recursive)
+  dirExcludes=$(join_by " -o -path " ${REPLACE_ENV_VARIABLES_EXCLUDE_PATHS})
+  if [[ $dirExcludes ]]; then
+    dirExcludes=" -type d ( -path ${dirExcludes} ) -prune -o"
+  fi
+
+  isDebugging && echo "Using find file exclusions: $fileExcludes"
+  isDebugging && echo "Using find directory exclusions: $dirExcludes"
+
+  for name in $(compgen -v $ENV_VARIABLE_PREFIX); do
+    # check if name of env variable matches the prefix
+    # sanity check environment variables to avoid code injections
+    # Read content from file environment
+    if [[ $name = *"_FILE" ]]; then
+      value=$(<${!name})
+      name="${name%_FILE}"
+    else
+      value=${!name}
+    fi
+
+    log "Replacing $name with $value ..."
+
+    value=${value//\\/\\\\}
+    value=${value//#/\\#}
+
+    find /data/ \
+        $dirExcludes \
+        -type f \
+        \( -name "*.yml" -or -name "*.yaml" -or -name "*.txt" -or -name "*.cfg" \
+        -or -name "*.conf" -or -name "*.properties" \) \
+        $fileExcludes \
+        -exec sed -i 's#${'"$name"'}#'"$value"'#g' {} \;
+  done
+fi
+
+exec ${SCRIPTS:-/}start-minecraftFinalSetup $@
--- a/2
+++ b/2
@@ -24,4 +24,4 @@ case "X$MODCONFIG" in
 esac
 fi

-exec ${SCRIPTS:-/}start-finalSetup04ServerProperties $@
+exec ${SCRIPTS:-/}start-finalSetupMounts $@
--- a/129
+++ b/129
@@ -1,80 +1,109 @@
 #!/bin/bash

-set -e
+set -e -o pipefail

 . ${SCRIPTS:-/}start-utils
+if isDebugging; then
+  set -x
+fi

 #  CURSE_URL_BASE used in manifest downloads below
 CURSE_URL_BASE=${CURSE_URL_BASE:-https://minecraft.curseforge.com/projects}

 # Remove old mods/plugins
-if [ "$REMOVE_OLD_MODS" = "TRUE" ]; then
-  if [ "$TYPE" = "SPIGOT" ]; then
-    rm -rf /data/plugins/*
+if isTrue ${REMOVE_OLD_MODS}; then
+  remove_mods_dest="/data/mods"
+  case ${TYPE} in
+    SPIGOT|BUKKIT|PAPER)
+      remove_mods_dest="/data/plugins"
+      ;;
+  esac
+
+  # only try to remove existing mods dir
+  if [ -d "$remove_mods_dest" ]; then
+    log "Removing old mods in $remove_mods_dest..."
+    find $remove_mods_dest -mindepth 1 -maxdepth ${REMOVE_OLD_MODS_DEPTH:-16} -wholename "${REMOVE_OLD_MODS_INCLUDE:-*}" -not -wholename "${REMOVE_OLD_MODS_EXCLUDE}" -delete
  else
-    rm -rf /data/mods/*
+    log "Directory $remove_mods_dest does not exist; removing nothing."
  fi
 fi

 # If supplied with a URL for a modpack (simple zip of jars), download it and unpack
 if [[ "$MODPACK" ]]; then
-EFFECTIVE_MODPACK_URL=$(curl -Ls -o /dev/null -w %{url_effective} $MODPACK)
-case "X$EFFECTIVE_MODPACK_URL" in
-  X[Hh][Tt][Tt][Pp]*.zip)
+  if isURL "${MODPACK}"; then
+    if [[ "${MODPACK}" == *.zip ]]; then
+      downloadUrl="${MODPACK}"
+    else
+      downloadUrl=$(curl -Ls -o /dev/null -w %{effective_url} $MODPACK)
+      if ! [[ $downloadUrl == *.zip ]]; then
+        log "ERROR Invalid URL given for MODPACK: $downloadUrl resolved from $MODPACK"
+        log "      Must be HTTP or HTTPS and a ZIP file"
+        exit 1
+      fi
+    fi
+
    log "Downloading mod/plugin pack via HTTP"
-    log "  from $EFFECTIVE_MODPACK_URL ..."
-    if ! curl -sSL -o /tmp/modpack.zip "$EFFECTIVE_MODPACK_URL"; then
-      log "ERROR: failed to download from $EFFECTIVE_MODPACK_URL"
+    log "  from $downloadUrl ..."
+    if ! curl -sSL -o /tmp/modpack.zip "$downloadUrl"; then
+      log "ERROR: failed to download from $downloadUrl"
      exit 2
    fi

    if [ "$TYPE" = "SPIGOT" ]; then
      mkdir -p /data/plugins
      if ! unzip -o -d /data/plugins /tmp/modpack.zip; then
-        log "ERROR: failed to unzip the modpack from $EFFECTIVE_MODPACK_URL"
+        log "ERROR: failed to unzip the modpack from $downloadUrl"
      fi
    else
      mkdir -p /data/mods
      if ! unzip -o -d /data/mods /tmp/modpack.zip; then
-        log "ERROR: failed to unzip the modpack from $EFFECTIVE_MODPACK_URL"
+        log "ERROR: failed to unzip the modpack from $downloadUrl"
      fi
    fi
    rm -f /tmp/modpack.zip
-    ;;
-  *)
-    log "Invalid URL given for modpack: Must be HTTP or HTTPS and a ZIP file"
-    ;;
-esac
+
+  else
+    log "ERROR Invalid URL given for MODPACK: $MODPACK"
+    exit 1
+  fi
 fi

 # If supplied with a URL for a plugin download it.
 if [[ "$MODS" ]]; then
-for i in ${MODS//,/ }
-do
-  EFFECTIVE_MOD_URL=$(curl -Ls -o /dev/null -w %{url_effective} $i)
-  case "X$EFFECTIVE_MOD_URL" in
-    X[Hh][Tt][Tt][Pp]*.jar)
-      log "Downloading mod/plugin via HTTP"
-      log "  from $EFFECTIVE_MOD_URL ..."
-      if ! curl -sSL -o /tmp/${EFFECTIVE_MOD_URL##*/} $EFFECTIVE_MOD_URL; then
-        log "ERROR: failed to download from $EFFECTIVE_MOD_URL to /tmp/${EFFECTIVE_MOD_URL##*/}"
-        exit 2
-      fi
+  if [ "$TYPE" = "SPIGOT" ]; then
+    out_dir=/data/plugins
+  else
+    out_dir=/data/mods
+  fi
+  mkdir -p "$out_dir"

-      if [ "$TYPE" = "SPIGOT" ]; then
-        mkdir -p /data/plugins
-        mv /tmp/${EFFECTIVE_MOD_URL##*/} /data/plugins/${EFFECTIVE_MOD_URL##*/}
+  for i in ${MODS//,/ }
+  do
+    if isURL $i; then
+      log "Downloading mod/plugin $i ..."
+      if isValidFileURL jar "$i"; then
+        if ! curl -fsSL -o "${out_dir}/$(getFilenameFromUrl "${i}")" "${i}"; then
+          log "ERROR: failed to download from $i into $out_dir"
+          exit 2
+        fi
      else
-        mkdir -p /data/mods
-        mv /tmp/${EFFECTIVE_MOD_URL##*/} /data/mods/${EFFECTIVE_MOD_URL##*/}
+        effective_url=$(resolveEffectiveUrl "$i")
+        if isValidFileURL jar "${effective_url}"; then
+          out_file=$(getFilenameFromUrl "${effective_url}")
+          if ! curl -fsSL -o "${out_dir}/$out_file" "${effective_url}"; then
+            log "ERROR: failed to download from $i into $out_dir"
+            exit 2
+          fi
+        else
+          log "ERROR: $effective_url resolved from $i is not a valid jar URL"
+          exit 2
+        fi
      fi
-      rm -f /tmp/${EFFECTIVE_MOD_URL##*/}
-      ;;
-    *)
-      log "Invalid URL given for modpack: Must be HTTP or HTTPS and a JAR file"
-      ;;
-  esac
-done
+    else
+      log "ERROR Invalid URL given in MODS: $i"
+      exit 2
+    fi
+  done
 fi

 if [[ "$MANIFEST" ]]; then
@@ -82,7 +111,7 @@ if [[ "$MANIFEST" ]]; then
        EFFECTIVE_MANIFEST_FILE=$MANIFEST
    elif isURL "$MANIFEST"; then
        EFFECTIVE_MANIFEST_FILE=/tmp/manifest.json
-        EFFECTIVE_MANIFEST_URL=$(curl -Ls -o /dev/null -w %{url_effective} $MANIFEST)
+        EFFECTIVE_MANIFEST_URL=$(curl -Ls -o /dev/null -w %{effective_url} $MANIFEST)
        curl -Ls -o $EFFECTIVE_MANIFEST_FILE "$EFFECTIVE_MANIFEST_URL"
    else
        log "MANIFEST='$MANIFEST' is not a valid manifest url or location"
@@ -103,7 +132,7 @@ case "X$EFFECTIVE_MANIFEST_FILE" in
      do
        if [ ! -f $MOD_DIR/${p}_${f}.jar ]
        then
-          redirect_url="$(curl -Ls -o /dev/null -w %{url_effective} ${CURSE_URL_BASE}/${p})"
+          redirect_url="$(curl -Ls -o /dev/null -w %{effective_url} ${CURSE_URL_BASE}/${p})"
          url="$redirect_url/download/${f}/file"
          log Downloading curseforge mod $url
          #  Manifest usually doesn't have mod names. Using id should be fine, tho
@@ -122,17 +151,17 @@ fi

 if [[ "${GENERIC_PACK}" ]]; then
  if isURL "${GENERIC_PACK}"; then
-    generic_pack_url=${GENERIC_PACK}
-    GENERIC_PACK=/tmp/$(basename ${generic_pack_url})
-    log "Downloading generic pack from ${generic_pack_url} ..."
-    curl -fsSL -o ${GENERIC_PACK} ${generic_pack_url}
+    log "Downloading generic pack ..."
+    curl -fsSL -o /tmp/generic_pack.zip "${GENERIC_PACK}"
+    GENERIC_PACK=/tmp/generic_pack.zip
  fi

  sum_file=/data/.generic_pack.sum
  if ! sha256sum -c ${sum_file} -s 2> /dev/null; then
    base_dir=/tmp/generic_pack_base
    mkdir -p ${base_dir}
-    unzip -q -d ${base_dir} ${GENERIC_PACK}
+    isDebugging && ls -l "${GENERIC_PACK}"
+    unzip -q -d ${base_dir} "${GENERIC_PACK}"
    if [ -f /data/manifest.txt ]; then
      log "Manifest exists from older generic pack, cleaning up ..."
      while read f; do
@@ -150,8 +179,8 @@ if [[ "${GENERIC_PACK}" ]]; then
    for d in $(find ${base_dir} -type d); do mkdir -p "$(sed "s#${base_dir}#/data#" <<< $d)"; done
    for f in $(find ${base_dir} -type f); do cp -f "$f" "$(sed "s#${base_dir}#/data#" <<< $f)"; done
    rm -rf ${base_dir}
-    sha256sum ${GENERIC_PACK} > ${sum_file}
+    sha256sum "${GENERIC_PACK}" > ${sum_file}
  fi
 fi

-exec ${SCRIPTS:-/}start-finalSetup03Modconfig $@
+exec ${SCRIPTS:-/}start-finalSetupModconfig $@
--- a/38
+++ b/38
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+. ${SCRIPTS:-/}start-utils
+
+: ${PLUGINS_SYNC_UPDATE:=true}
+
+isDebugging && set -x
+
+if [ -d /plugins ]; then
+  case ${TYPE} in
+    SPIGOT|BUKKIT|PAPER|MAGMA)
+      mkdir -p /data/plugins
+      log "Copying plugins over..."
+      if isTrue ${PLUGINS_SYNC_UPDATE}; then
+        updateArg="--update"
+      fi
+      # Copy plugins over using rsync to allow deeply nested updates of plugins
+      rsync -a --out-format="update:%f:Last Modified %M" --prune-empty-dirs $updateArg /plugins /data
+      ;;
+  esac
+fi
+
+# If any modules have been provided, copy them over
+if [ -d /mods ]; then
+  log "Copying any mods over..."
+  mkdir -p /data/mods
+  rsync -a --out-format="update:%f:Last Modified %M" "${rsyncArgs[@]}" --prune-empty-dirs --update /mods /data
+fi
+
+: ${COPY_CONFIG_DEST:="/data/config"}
+
+if [ -d /config ]; then
+  log "Copying any configs from /config to $COPY_CONFIG_DEST"
+  mkdir -p $COPY_CONFIG_DEST
+  rsync -a --out-format="update:%f:Last Modified %M" "${rsyncArgs[@]}" --prune-empty-dirs --update /config/ $COPY_CONFIG_DEST
+fi
+
+exec ${SCRIPTS:-/}start-finalSetupServerProperties $@
--- a/17
+++ b/17
@@ -2,6 +2,8 @@

 . ${SCRIPTS:-/}start-utils

+: ${SERVER_PROPERTIES:=/data/server.properties}
+
 # FUNCTIONS
 function setServerProp {
  local prop=$1
@@ -12,10 +14,15 @@ function setServerProp {
      TRUE|FALSE)
        var=${var,,} ;;
    esac
-    log "Setting ${prop} to '${var}' in ${SERVER_PROPERTIES}"
-    sed -i "/^${prop}\s*=/ c ${prop}=${var}" "$SERVER_PROPERTIES"
+    if grep "${prop}" "$SERVER_PROPERTIES" > /dev/null; then
+      log "Setting ${prop} to '${var}' in ${SERVER_PROPERTIES}"
+      sed -i "/^${prop}\s*=/ c ${prop}=${var//\\/\\\\}" "$SERVER_PROPERTIES"
+    else
+      log "Adding ${prop} with '${var}' in ${SERVER_PROPERTIES}"
+      echo "${prop}=${var//\\/\\\\}" >> "$SERVER_PROPERTIES"
+    fi
  else
-    log "Skip setting ${prop}"
+    isDebugging && log "Skip setting ${prop}"
  fi
 }

@@ -69,7 +76,7 @@ function customizeServerProps {
  setServerProp "max-world-size" "$MAX_WORLD_SIZE"
  setServerProp "level-name" "$LEVEL"
  setServerProp "level-seed" "$SEED"
-  setServerProp "pvp" "$PVP"
+  setServerProp "pvp" "${PVP}"
  setServerProp "generator-settings" "$GENERATOR_SETTINGS"
  setServerProp "online-mode" "$ONLINE_MODE"
  setServerProp "allow-flight" "$ALLOW_FLIGHT"
@@ -206,4 +213,4 @@ if isDebugging; then
  cat /data/server.properties
 fi

-exec ${SCRIPTS:-/}start-finalSetup05EnvVariables $@
+exec ${SCRIPTS:-/}start-finalSetupEnvVariables $@
--- a/23
+++ b/23
@@ -4,13 +4,16 @@
 set -e
 isDebugging && set -x

+: ${LEVEL:=world}
+export LEVEL
+
 if [ $TYPE = "FEED-THE-BEAST" ]; then
  worldDest=$FTB_DIR/$LEVEL
 else
  worldDest=/data/$LEVEL
 fi

-if [[ "$WORLD" ]] && [ ! -d "$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
@@ -25,7 +28,12 @@ if [[ "$WORLD" ]] && [ ! -d "$worldDest" ]; then
    mkdir -p /tmp/world-data
    (cd /tmp/world-data && unzip -o -q "$zipSrc")

-    baseDirs=$(find /tmp/world-data -name "level.dat" -exec dirname "{}" \;)
+    if [ "$TYPE" = "SPIGOT" ]; then
+      baseDirs=$(find /tmp/world-data -name "level.dat" -not -path "*_nether*" -not -path "*_the_end*" -exec dirname "{}" \;)
+    else
+      baseDirs=$(find /tmp/world-data -name "level.dat" -exec dirname "{}" \;)
+    fi
+
    count=$(echo "$baseDirs" | wc -l)
    if [[ $count -gt 1 ]]; then
      baseDir="$(echo "$baseDirs" | sed -n ${WORLD_INDEX:-1}p)"
@@ -37,10 +45,15 @@ if [[ "$WORLD" ]] && [ ! -d "$worldDest" ]; then
      log "ERROR invalid world content"
      exit 1
    fi
-    mv "$baseDir" "$worldDest"
+    rsync --remove-source-files --recursive --delete "$baseDir/" "$worldDest"
+    if [ "$TYPE" = "SPIGOT" ]; then
+      log "Copying end and nether ..."
+      [ -d "${baseDir}_nether" ] && rsync --remove-source-files --recursive --delete "${baseDir}_nether/" "${worldDest}_nether"
+      [ -d "${baseDir}_the_end" ] && rsync --remove-source-files --recursive --delete "${baseDir}_the_end/" "${worldDest}_the_end"
+    fi
  else
    log "Cloning world directory from $WORLD ..."
-    cp -r "$WORLD" "$worldDest"
+    rsync --recursive --delete "${WORLD%/}"/ "$worldDest"
  fi

  if [ "$TYPE" = "SPIGOT" ]; then
@@ -51,4 +64,4 @@ if [[ "$WORLD" ]] && [ ! -d "$worldDest" ]; then
  fi
 fi

-exec ${SCRIPTS:-/}start-finalSetup02Modpack $@
+exec ${SCRIPTS:-/}start-finalSetupModpack $@
--- a/147
+++ b/147
@@ -3,28 +3,40 @@
 . ${SCRIPTS:-/}start-utils

 if [ -n "$OPS" ]; then
-  log "Setting/adding ops"
-  rm -rf /data/ops.txt.converted
+  log "Updating ops"
+  rm -f /data/ops.txt.converted
  echo $OPS | awk -v RS=, '{print}' > /data/ops.txt
+
+  if isTrue "${OVERRIDE_OPS}"; then
+    log "Recreating ops.json file at server startup"
+    rm -f /data/ops.json
+  fi
 fi

 if [ -n "$WHITELIST" ]; then
-  log "Setting whitelist"
-  rm -rf /data/white-list.txt.converted
+  log "Updating whitelist"
+  rm -f /data/white-list.txt.converted
  echo $WHITELIST | awk -v RS=, '{print}' > /data/white-list.txt
+
+  if isTrue "${OVERRIDE_WHITELIST}"; then
+    log "Recreating whitelist.json file at server startup"
+    rm -f /data/whitelist.json
+  fi
 fi

-if [ -n "$ICON" -a ! -e server-icon.png ]; then
-  log "Using server icon from $ICON..."
-  # Not sure what it is yet...call it "img"
-  curl -sSL -o /tmp/icon.img $ICON
-  specs=$(identify /tmp/icon.img | awk '{print $2,$3}')
-  if [ "$specs" = "PNG 64x64" ]; then
-    mv /tmp/icon.img /data/server-icon.png
-  else
-    log "Converting image to 64x64 PNG..."
-    convert /tmp/icon.img -resize 64x64! /data/server-icon.png
-  fi
+if [ -n "$ICON" ]; then
+    if [ ! -e server-icon.png ] || [ "${OVERRIDE_ICON}" == "TRUE" ]; then
+      log "Using server icon from $ICON..."
+      # Not sure what it is yet...call it "img"
+      curl -sSL -o /tmp/icon.img $ICON
+      specs=$(identify /tmp/icon.img | awk '{print $2,$3}')
+      if [ "$specs" = "PNG 64x64" ]; then
+        mv /tmp/icon.img /data/server-icon.png
+      else
+        log "Converting image to 64x64 PNG..."
+        convert /tmp/icon.img -resize 64x64! /data/server-icon.png
+      fi
+    fi
 fi

 if ! isTrue ${SKIP_LOG4J_CONFIG}; then
@@ -49,35 +61,6 @@ for j in $JSON_FILES; do
  fi
 done

-
-# If any modules have been provided, copy them over
-if [ -d /mods ]; then
-  log "Copying any mods over..."
-  mkdir -p /data/mods
-  rsync -a --out-format="update:%f:Last Modified %M" --prune-empty-dirs --update /mods /data
-fi
-
-[ -d /data/config ] || mkdir /data/config
-for c in /config/*
-do
-  if [ -f "$c" ]; then
-    log Copying configuration $(basename "$c")
-    cp -rf "$c" /data/config
-  fi
-done
-
-case ${TYPE} in
-  SPIGOT|BUKKIT|PAPER)
-    mkdir -p /data/plugins
-    if [ -d /plugins ]; then
-      log "Copying plugins over..."
-      # Copy plugins over using rsync to allow deeply nested updates of plugins
-      # only updates files if the source file is newer and print updated files
-      rsync -a --out-format="update:%f:Last Modified %M" --prune-empty-dirs --update /plugins /data
-    fi
-    ;;
-esac
-
 EXTRA_ARGS=""
 # Optional disable console
 if versionLessThan 1.14 && [[ ${CONSOLE,,} = false ]]; then
@@ -101,7 +84,6 @@ if [ -n "$JVM_DD_OPTS" ]; then
 fi

 if isTrue ${ENABLE_JMX}; then
-  : ${JMX_HOST:=0.0.0.0}
  : ${JMX_PORT:=7091}
  JVM_OPTS="${JVM_OPTS}
  -Dcom.sun.management.jmxremote.local.only=false
@@ -109,8 +91,8 @@ if isTrue ${ENABLE_JMX}; then
  -Dcom.sun.management.jmxremote.rmi.port=${JMX_PORT}
  -Dcom.sun.management.jmxremote.authenticate=false
  -Dcom.sun.management.jmxremote.ssl=false
-  -Dcom.sun.management.jmxremote.host=${JMX_HOST}
-  -Djava.rmi.server.hostname=${JMX_HOST}"
+  -Dcom.sun.management.jmxremote.host=${JMX_BINDING:-0.0.0.0}
+  -Djava.rmi.server.hostname=${JMX_HOST:-localhost}"

  log "JMX is enabled. Make sure you have port forwarding for ${JMX_PORT}"
 fi
@@ -170,49 +152,65 @@ if isTrue "${DEBUG_MEMORY}"; then
  free -m
 fi

-mcServerRunnerArgs="--stop-duration 60s"
+JVM_OPTS="-Xms${INIT_MEMORY} -Xmx${MAX_MEMORY} ${JVM_OPTS}"
+
+function copyFilesForCurseForge() {
+  # copy player modification files unconditionally since their
+  # processing into json is additive anyway
+  [ -f /data/ops.txt ] && cp -f /data/ops.txt "${FTB_DIR}/"
+  [ -f /data/white-list.txt ] && cp -f /data/white-list.txt "${FTB_DIR}/"
+
+  if [ ! -e "${FTB_DIR}/server-icon.png" -a -e /data/server-icon.png ]; then
+    cp -f /data/server-icon.png "${FTB_DIR}/"
+  fi
+
+  cp -f /data/eula.txt "${FTB_DIR}/"
+}
+
+if ! which java > /dev/null; then
+  log "Fixing PATH to include java"
+  PATH="${PATH}:/usr/bin"
+fi
+
+mcServerRunnerArgs="--stop-duration ${STOP_DURATION:-60}s"
 if [[ ${TYPE} == "CURSE_INSTANCE" ]]; then
-    JVM_OPTS="-Xms${INIT_MEMORY} -Xmx${MAX_MEMORY} ${JVM_OPTS}"
    if isTrue ${DEBUG_EXEC}; then
      set -x
    fi
    exec mc-server-runner ${mcServerRunnerArgs} \
      --cf-instance-file "${CURSE_INSTANCE_JSON}" \
      java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar _SERVERJAR_ "$@" $EXTRA_ARGS
-elif [[ ${TYPE} == "FEED-THE-BEAST" ]]; then
-    mcServerRunnerArgs="${mcServerRunnerArgs} --shell bash"
+elif [[ ${TYPE} == "CURSEFORGE" && "${SERVER}" ]]; then
+  copyFilesForCurseForge

-    if [ ! -e "${FTB_DIR}/ops.json" -a -e /data/ops.txt ]; then
-      cp -f /data/ops.txt ${FTB_DIR}/
-    fi
+  cd "${FTB_DIR}"
+  log "Starting CurseForge server in ${FTB_DIR}..."
+  if isTrue ${DEBUG_EXEC}; then
+    set -x
+  fi
+  exec mc-server-runner ${bootstrapArgs} ${mcServerRunnerArgs} java $JVM_XX_OPTS $JVM_OPTS $expandedDOpts -jar $(basename "${SERVER}") "$@" $EXTRA_ARGS
+elif [[ ${TYPE} == "CURSEFORGE" ]]; then
+  mcServerRunnerArgs="${mcServerRunnerArgs} --shell bash"

-    if [ ! -e "${FTB_DIR}/whitelist.json" -a -e /data/white-list.txt ]; then
-      cp -f /data/white-list.txt ${FTB_DIR}/
-    fi
+  copyFilesForCurseForge

-    if [ ! -e "${FTB_DIR}/server-icon.png" -a -e /data/server-icon.png ]; then
-      cp -f /data/server-icon.png ${FTB_DIR}/
-    fi
-
-    cp -f /data/eula.txt "${FTB_DIR}/"
-
-    cat > "${FTB_DIR}/settings-local.sh" <<EOF
+  cat > "${FTB_DIR}/settings-local.sh" <<EOF
 export MIN_RAM="${INIT_MEMORY}"
 export MAX_RAM="${MAX_MEMORY}"
 export JAVA_PARAMETERS="${JVM_XX_OPTS} -Xms${INIT_MEMORY} ${JVM_OPTS} $expandedDOpts"
 EOF

-    # patch CurseForge cfg file, if present
-    if [ -f "${FTB_DIR}/settings.cfg" ]; then
-      sed -i "s/MAX_RAM=[^;]*/MAX_RAM=${MAX_MEMORY}/" "${FTB_DIR}/settings.cfg"
-    fi
+  # patch CurseForge cfg file, if present
+  if [ -f "${FTB_DIR}/settings.cfg" ]; then
+    sed -i "s/MAX_RAM=[^;]*/MAX_RAM=${MAX_MEMORY}/" "${FTB_DIR}/settings.cfg"
+  fi

-    cd "${FTB_DIR}"
-    log "Running FTB ${FTB_SERVER_START} in ${FTB_DIR} ..."
-    if isTrue ${DEBUG_EXEC}; then
-      set -x
-    fi
-    exec mc-server-runner ${mcServerRunnerArgs} "${FTB_SERVER_START}"
+  cd "${FTB_DIR}"
+  log "Running FTB ${FTB_SERVER_START} in ${FTB_DIR} ..."
+  if isTrue ${DEBUG_EXEC}; then
+    set -x
+  fi
+  exec mc-server-runner ${mcServerRunnerArgs} "${FTB_SERVER_START}"
 else
  # If we have a bootstrap.txt file... feed that in to the server stdin
  if [ -f /data/bootstrap.txt ]; then
@@ -220,7 +218,6 @@ else
  fi

  log "Starting the Minecraft server..."
-  JVM_OPTS="-Xms${INIT_MEMORY} -Xmx${MAX_MEMORY} ${JVM_OPTS}"
  if isTrue ${DEBUG_EXEC}; then
    set -x
  fi
--- a/128
+++ b/128
@@ -1,6 +1,14 @@
 #!/bin/bash

-function isURL {
+function join_by() {
+  local d=$1
+  shift
+  echo -n "$1"
+  shift
+  printf "%s" "${@/#/$d}"
+}
+
+function isURL() {
  local value=$1

  if [[ ${value:0:8} == "https://" || ${value:0:7} == "http://" ]]; then
@@ -10,90 +18,114 @@ function isURL {
  fi
 }

-function isTrue {
+function isValidFileURL() {
+  suffix=${1:?Missing required suffix arg}
+  url=${2:?Missing required url arg}
+
+  [[ "$url" == http*://*.${suffix} || "$url" == http*://*.${suffix}\?* ]]
+}
+
+function resolveEffectiveUrl() {
+  url="${1:?Missing required url argument}"
+  if ! curl -Ls -o /dev/null -w %{url_effective} "$url"; then
+    log "ERROR failed to resolve effective URL from $url"
+    exit 2
+  fi
+}
+
+function getFilenameFromUrl() {
+  url="${1:?Missing required url argument}"
+  strippedOfQuery="${url%\?*}"
+  basename "$strippedOfQuery"
+}
+
+function isTrue() {
  local value=${1,,}

  result=

  case ${value} in
-    true|on)
-      result=0
-      ;;
-    *)
-      result=1
-      ;;
+  true | on)
+    result=0
+    ;;
+  *)
+    result=1
+    ;;
  esac

  return ${result}
 }

-function isDebugging {
-  if [[ -v DEBUG ]] && [[ ${DEBUG^^} = TRUE ]]; then
+function isDebugging() {
+  if [[ -v DEBUG ]] && [[ ${DEBUG^^} == TRUE ]]; then
    return 0
  else
    return 1
  fi
 }

-function debug {
+function debug() {
  if isDebugging; then
    log "DEBUG: $*"
  fi
 }

-function logn {
+function logn() {
  echo -n "[init] $*"
 }

-function log {
+function log() {
  echo "[init] $*"
 }

-function logAutopause {
+function logAutopause() {
  echo "[Autopause loop] $*"
 }

-function logAutopauseAction {
+function logAutopauseAction() {
  echo "[$(date -Iseconds)] [Autopause] $*"
 }

-function normalizeMemSize {
+function normalizeMemSize() {
  local scale=1
  case ${1,,} in
-    *k)
-      scale=1024;;
-    *m)
-      scale=1048576;;
-    *g)
-      scale=1073741824;;
+  *k)
+    scale=1024
+    ;;
+  *m)
+    scale=1048576
+    ;;
+  *g)
+    scale=1073741824
+    ;;
  esac

-  val=${1:0: -1}
-  echo $(( val * scale ))
+  val=${1:0:-1}
+  echo $((val * scale))
 }

-function versionLessThan {
+function versionLessThan() {
  local activeParts
-  IFS=. read -ra activeParts <<< "${VANILLA_VERSION}"
+  IFS=. read -ra activeParts <<<"${VANILLA_VERSION}"

  local givenParts
-  IFS=. read -ra givenParts <<< "$1"
+  IFS=. read -ra givenParts <<<"$1"

-  if (( ${#activeParts[@]} < 2 )); then
+  if ((${#activeParts[@]} < 2)); then
    return 1
  fi

-  if (( ${#activeParts[@]} == 2 )); then
-    if (( activeParts[0] < givenParts[0] )) || \
-      (( activeParts[0] == givenParts[0] && activeParts[1] < givenParts[1] )); then
+  if ((${#activeParts[@]} == 2)); then
+    if ((activeParts[0] < givenParts[0])) ||
+      ((activeParts[0] == givenParts[0] && activeParts[1] < givenParts[1])); then
      return 0
    else
      return 1
    fi
  else
-    if (( activeParts[0] < givenParts[0] )) || \
-      (( activeParts[0] == givenParts[0] && activeParts[1] < givenParts[1] )) || \
-      (( activeParts[0] == givenParts[0] && activeParts[1] == givenParts[1] && activeParts[2] < givenParts[2] )); then
+    if ((activeParts[0] < givenParts[0])) ||
+      ((activeParts[0] == givenParts[0] && activeParts[1] < givenParts[1])) ||
+      ((activeParts[0] == givenParts[0] && activeParts[1] == givenParts[1] && activeParts[2] < givenParts[2])); then
      return 0
    else
      return 1
@@ -106,4 +138,32 @@ requireVar() {
    log "ERROR: $1 is required to be set"
    exit 1
  fi
+  if [ -z "${!1}" ]; then
+    log "ERROR: $1 is required to be set"
+    exit 1
+  fi
+}
+
+requireEnum() {
+  var=${1?}
+  shift
+
+  for allowed in $*; do
+    if [[ ${!var} = $allowed ]]; then
+      return 0
+    fi
+  done
+
+  log "ERROR: $var must be set to one of $@"
+#  exit 1
+}
+
+function writeEula() {
+  if ! echo "# Generated via Docker
+# $(date)
+eula=${EULA,,}
+" >/data/eula.txt; then
+    log "ERROR: unable to write eula to /data. Please make sure attached directory is writable by uid=${UID}"
+    exit 2
+  fi
 }
--- a/2
+++ b/2
@@ -15,4 +15,4 @@ fi
 log "Resolved CURSE_INSTANCE_JSON as ${CURSE_INSTANCE_JSON}"

 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetup01World "$@"
+exec ${SCRIPTS:-/}start-finalSetupWorld "$@"
--- a/tests/docker-compose.test.yml
+++ b/tests/docker-compose.test.yml
@@ -0,0 +1,17 @@
+version: "3.8"
+
+services:
+  sut:
+    depends_on:
+      - mc
+    image: itzg/mc-monitor:0.6.0
+    command: status --host mc --retry-interval 1s --retry-limit 120
+  mc:
+    restart: "no"
+    build:
+      context: ..
+      cache_from:
+      - itzg/minecraft-server:latest
+    environment:
+      EULA: "TRUE"
+
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+cd $(dirname $0)
+
+failed=false
+args="-f docker-compose.test.yml"
+docker-compose $args run sut || failed=true
+echo "
+Result: failed=$failed"
+
+$failed && docker-compose $args logs mc
+docker-compose $args down -v
+
+if $failed; then
+  exit 1
+fi
+