Add support for Fabric server

minecraft-server/Dockerfile

@@ -76,7 +76,7 @@ ENTRYPOINT [ "/start" ]
 
 ENV UID=1000 GID=1000 \
   JVM_XX_OPTS="-XX:+UseG1GC" MEMORY="1G" \
-  TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED SPONGEBRANCH=STABLE SPONGEVERSION= LEVEL=world \
+  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 GENERATOR_SETTINGS= WORLD= MODPACK= MODS= SERVER_PORT=25565 ONLINE_MODE=TRUE CONSOLE=true SERVER_NAME="Dedicated Server" \
   REPLACE_ENV_VARIABLES="FALSE" ENV_VARIABLE_PREFIX="CFG_"

minecraft-server/README.md

@@ -529,6 +529,72 @@ Just change it with `SPONGEBRANCH`, such as:
     $ docker run -d -v /path/on/host:/data ... \
         -e TYPE=SPONGEVANILLA -e SPONGEBRANCH=EXPERIMENTAL ...
 
+## 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`.
+
+    $ docker run -d -v /path/on/host:/data -e VERSION=1.14.3 \
+        -e TYPE=FABRIC -e FABRICVERSION=0.5.0.32 \
+        -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
+specify the name of the installer file with `FABRIC_INSTALLER`, such as:
+
+    $ docker run -d -v /path/on/host:/data ... \
+        -e FABRIC_INSTALLER=fabric-installer-0.5.0.32.jar ...
+
+To download a Forge 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 FORGE_INSTALLER_URL=http://HOST/fabric-installer-0.5.0.32.jar ...
+
+In both of the cases above, there is no need for the `VERSION` or `FABRICVERSION` variables.
+
+In order to add mods, you have two options.
+
+### 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 mods to the `/path/on/host/mods` folder you chose. From the example above,
+the `/path/on/host` folder contents look like:
+
+```
+/path/on/host
+├── mods
+│   └── ... INSTALL MODS HERE ...
+├── config
+│   └── ... CONFIGURE MODS HERE ...
+├── ops.json
+├── server.properties
+├── whitelist.json
+└── ...
+```
+
+If you add mods 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 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.
+
+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.
+
 ## 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

minecraft-server/start-configuration

@@ -77,6 +77,10 @@ case "${TYPE^^}" in
     exec /start-deployForge $@
   ;;
 
+  FABRIC)
+    exec /start-deployFabric $@
+  ;;
+
   FTB|CURSEFORGE)
     exec /start-deployFTB $@
   ;;

minecraft-server/start-deployFabric

@@ -0,0 +1,84 @@
+#!/bin/bash
+set -u
+
+export TYPE=FABRIC
+
+FABRIC_INSTALLER=${FABRIC_INSTALLER:-}
+FABRIC_INSTALLER_URL=${FABRIC_INSTALLER_URL:-}
+FABRICVERSION=${FABRICVERSION:-LATEST}
+if [[ -z $FABRIC_INSTALLER && -z $FABRIC_INSTALLER_URL ]]; then
+  echo "Checking Fabric version information."
+  case $FABRICVERSION in
+    LATEST)
+      FABRIC_VERSION=$(python - << 'EOF'
+import sys
+import xml.etree.ElementTree as ET
+from contextlib import closing
+from urllib2 import urlopen
+
+with closing(urlopen('https://maven.fabricmc.net/net/fabricmc/fabric-installer/maven-metadata.xml')) as resp:
+  xml = resp.read()
+
+root = ET.fromstring(xml)
+version = root.find('*/release').text
+print version
+EOF
+)
+      ;;
+
+    *)
+      FABRIC_VERSION=$FABRICVERSION
+      ;;
+  esac
+
+  FABRIC_INSTALLER="/tmp/fabric-installer-$FABRIC_VERSION.jar"
+
+elif [[ -z $FABRIC_INSTALLER ]]; then
+  FABRIC_INSTALLER="/tmp/fabric-installer.jar"
+elif [[ ! -e $FABRIC_INSTALLER ]]; then
+  echo "ERROR: the given Fabric installer doesn't exist : $FABRIC_INSTALLER"
+  exit 2
+fi
+
+installMarker=".fabric-installed-${FABRIC_VERSION:-manual}"
+
+if [[ ! -e $installMarker ]]; then
+  if [[ ! -e $FABRIC_INSTALLER ]]; then
+    if [[ -z $FABRIC_INSTALLER_URL ]]; then
+      echo "Downloading $FABRIC_VERSION"
+      downloadUrl="https://maven.fabricmc.net/net/fabricmc/fabric-installer/$FABRIC_VERSION/fabric-installer-$FABRIC_VERSION.jar"
+      echo "...trying $downloadUrl"
+      curl -o $FABRIC_INSTALLER -fsSL $downloadUrl
+    else
+      echo "Downloading $FABRIC_INSTALLER_URL ..."
+      if ! curl -o $FABRIC_INSTALLER -fsSL $FABRIC_INSTALLER_URL; then
+        echo "Failed to download from given location $FABRIC_INSTALLER_URL"
+        exit 2
+      fi
+    fi
+  fi
+
+  echo "Installing Fabric $FABRIC_VERSION using $FABRIC_INSTALLER"
+  tries=3
+  set +e
+  while ((--tries >= 0)); do
+    java -jar $FABRIC_INSTALLER server -version $VANILLA_VERSION -downloadMinecraft
+    if [[ $? == 0 ]]; then
+      break
+    fi
+  done
+  set -e
+  if (($tries < 0)); then
+    echo "Fabric failed to install after several tries." >&2
+    exit 10
+  fi
+  export SERVER=fabric-server-launch.jar
+  echo "Using server $SERVER"
+  echo $SERVER > $installMarker
+
+else
+  export SERVER=$(< $installMarker)
+fi
+
+# Contineut to Final Setup
+exec /start-finalSetup01World $@