[mc] Use restify to lookup Spigot/Bukkit URLs at startup

For #87

minecraft-server/Dockerfile

@@ -21,28 +21,22 @@ RUN useradd -M -s /bin/false --uid 1000 minecraft \
   && mkdir /plugins \
   && chown minecraft:minecraft /data /config /mods /plugins
 
-EXPOSE 25565
-EXPOSE 25575
+EXPOSE 25565 25575
 
-COPY get-mcadmin-versions.sh /get-mcadmin-versions
-RUN /get-mcadmin-versions https://mcadmin.net/
+ADD https://github.com/itzg/restify/releases/download/1.0.3/restify_linux_amd64 /usr/local/bin/restify
 COPY start.sh /start
 COPY start-minecraft.sh /start-minecraft
+COPY mcadmin.jq /usr/share
+RUN chmod +x /usr/local/bin/*
 
-VOLUME ["/data"]
-VOLUME ["/mods"]
-VOLUME ["/config"]
-VOLUME ["/plugins"]
+VOLUME ["/data","/mods","/config","/plugins"]
 COPY server.properties /tmp/server.properties
 WORKDIR /data
 
 ENTRYPOINT [ "/start" ]
 
-# Special marker ENV used by MCCY management tool
-ENV MC_IMAGE=YES
-
-ENV UID=1000 GID=1000
-ENV MOTD A Minecraft Server Powered by Docker
-ENV JVM_OPTS -Xmx1024M -Xms1024M
-ENV TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED LEVEL=world PVP=true DIFFICULTY=easy \
-  LEVEL_TYPE=DEFAULT GENERATOR_SETTINGS= WORLD= MODPACK=
+ENV UID=1000 GID=1000 \
+    MOTD="A Minecraft Server Powered by Docker" \
+    JVM_OPTS="-Xmx1024M -Xms1024M" \
+    TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED LEVEL=world PVP=true DIFFICULTY=easy \
+    LEVEL_TYPE=DEFAULT GENERATOR_SETTINGS= WORLD= MODPACK=

minecraft-server/get-mcadmin-versions.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-
-if [ $# -lt 1 ]; then
-  echo Missing arg: URL
-  exit 1
-fi
-
-cd /tmp
-wget -qO mcadmin-versions.jar https://bintray.com/itzgeoff/artifacts/download_file?file_path=me%2Fitzg%2Fmcadmin-versions%2F1.1.0%2Fmcadmin-versions-1.1.0.jar
-wget -q http://central.maven.org/maven2/org/jsoup/jsoup/1.9.1/jsoup-1.9.1.jar
-
-java -jar mcadmin-versions.jar $1 > /tmp/mcadmin-versions.db
-rm *.jar

minecraft-server/mcadmin.jq

@@ -0,0 +1,7 @@
+.[] |
+ select(.elements | length > 1) |
+  select(.elements[].elements[] | select(.class == "version" and .text == $version)) |
+   .elements[].elements[] | 
+    select(.class|contains("server-jar")) |
+     .elements[] | select(.name="a") |
+      .href

minecraft-server/start-minecraft.sh

@@ -63,7 +63,8 @@ function downloadSpigot {
       ;;
   esac
 
-  downloadUrl=$(awk -F:: "\$1 == \"${match}\" && \$2 == \"${VANILLA_VERSION}\" {print \$3}" /tmp/mcadmin-versions.db)
+  downloadUrl=$(restify --class=jar-div https://mcadmin.net/ | \
+    jq --arg version "$match $VANILLA_VERSION" -r -f /usr/share/mcadmin.jq)
   if [[ -n $downloadUrl ]]; then
     echo "Downloading $match"
     wget -q -O $SERVER "$downloadUrl"
@@ -74,7 +75,7 @@ function downloadSpigot {
     fi
   else
     echo "ERROR: Version $VANILLA_VERSION is not supported for $TYPE"
-    echo "       Refer to http://getspigot.org for supported versions"
+    echo "       Refer to https://mcadmin.net/ for supported versions"
     exit 2
   fi
 }