Pre-compute the Bukkit/Spigot download URLs

For #77

minecraft-server/Dockerfile

@@ -24,6 +24,8 @@ RUN useradd -M -s /bin/false --uid 1000 minecraft \
 EXPOSE 25565
 EXPOSE 25575
 
+COPY get-mcadmin-versions.sh /get-mcadmin-versions
+RUN /get-mcadmin-versions https://mcadmin.net/
 COPY start.sh /start
 COPY start-minecraft.sh /start-minecraft
 

minecraft-server/get-mcadmin-versions.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+if [ $# -lt 1 ]; then
+  echo Missing arg: URL
+  exit 1
+fi
+
+cd /tmp
+wget -O 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 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/start-minecraft.sh

@@ -50,22 +50,18 @@ function buildSpigotFromSource {
 }
 
 function downloadSpigot {
+  local match
   case "$TYPE" in
     *BUKKIT|*bukkit)
-      match="Craftbukkit $VANILLA_VERSION"
+      match="Craftbukkit"
+
       ;;
     *)
-      match="Spigot $VANILLA_VERSION"
+      match="Spigot"
       ;;
   esac
 
-  curl -o /tmp/versions -sSL https://getspigot.org/api/getversions
-  status=$?
-  if [ $status != 0 ]; then
-    echo "ERROR: failed to access Spigot versions (curl error code was $status)"
-    exit 3
-  fi
-  downloadUrl=$(cat /tmp/versions | jq -r ".[] | select(.version == \"$match\") | .downloadUrl")
+  downloadUrl=$(awk -F:: "\$1 == \"${match}\" && \$2 == \"${VANILLA_VERSION}\" {print \$3}" /tmp/mcadmin-versions.db)
   if [[ -n $downloadUrl ]]; then
     echo "Downloading $match"
     wget -q -O $SERVER "$downloadUrl"