Added support for Magma servers

For #497

README.md

@@ -444,6 +444,14 @@ 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 Magma server
+
+A [Magma](https://magmafoundation.org/) server, which is a combination of Forge and PaperMC, can be used with
+
+    -e TYPE=MAGMA
+    
+> **NOTE** there are limited base versions supported, so you will also need to  set `VERSION`, such as "1.12.2"
+
 ## Running a Server with a Feed-The-Beast (FTB) / CurseForge modpack
 
 Enable this server mode by adding a `-e TYPE=FTB` or `-e TYPE=CURSEFORGE` to your command-line,

start-configuration

@@ -106,6 +106,10 @@ case "${TYPE^^}" in
     exec /start-validateCurseInstance "$@"
   ;;
 
+  MAGMA)
+    exec /start-magma "$@"
+  ;;
+
   *)
       log "Invalid type: '$TYPE'"
       log "Must be: VANILLA, FORGE, BUKKIT, SPIGOT, PAPER, FTB, CURSEFORGE, SPONGEVANILLA"

start-deployBukkitSpigot

@@ -82,6 +82,7 @@ fi
 
 # Normalize on Spigot for operations below
 export TYPE=SPIGOT
+export SKIP_LOG4J_CONFIG=true
 
 # Continue to Final Setup
 exec /start-finalSetup01World $@

start-deployCustom

@@ -25,5 +25,7 @@ else
   exit 2
 fi
 
+export SKIP_LOG4J_CONFIG=true
+
 # Continue to Final Setup
 exec /start-finalSetup01World $@

start-magma

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+. /start-utils
+
+export SERVER="/data/magma-server-${VANILLA_VERSION}.jar"
+
+# Always download since new updates of each base version are published frequently
+if ! curl -o /data/magma-server-${VANILLA_VERSION}.jar -fsSL \
+  https://api.magmafoundation.org/api/resources/Magma/${VANILLA_VERSION}/stable/latest/download; then
+  log "ERROR unable to download version ${VANILLA_VERSION} of Magma"
+  log "      Check https://magmafoundation.org/ for available versions"
+  exit 1
+fi
+
+export SKIP_LOG4J_CONFIG=true
+
+# Continue to Final Setup
+exec /start-finalSetup01World $@

start-minecraftFinalSetup

@@ -27,7 +27,7 @@ if [ -n "$ICON" -a ! -e server-icon.png ]; then
   fi
 fi
 
-if [ ${TYPE} != "SPIGOT" ]; then
+if ! isTrue ${SKIP_LOG4J_CONFIG}; then
 # Set up log configuration
 LOGFILE="/data/log4j2.xml"
 if [ ! -e "$LOGFILE" ]; then