Builds with latest scala, and quite a lot of warnings

kafka/Dockerfile

@@ -1,23 +1,24 @@
 FROM openjdk:8u131-jre-alpine
 
-ENV KAFKA_VERSION=0.11.0.0-rc2
+ENV KAFKA_VERSION=0.11.0.0-rc2 SCALA_VERSION=2.12.2
 
 RUN set -e; cd /usr/local; \
   GRADLE_VERSION=4.0 PATH=$PATH:$(pwd)/gradle-$GRADLE_VERSION/bin; \
-  apk add --no-cache curl; \
+  apk add --no-cache curl openjdk8="$JAVA_ALPINE_VERSION"; \
   curl -SLs -o gradle-$GRADLE_VERSION-bin.zip https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zip; \
   unzip gradle-$GRADLE_VERSION-bin.zip; \
   rm gradle-$GRADLE_VERSION-bin.zip; \
-  gradle -v; \
-  \
-  gradle
+  gradle -v;
 
 RUN set -e; cd /usr/local; \
   export PATH=$PATH:/usr/local/gradle-4.0/bin; \
-  mkdir kafka-build; \
-  curl -SLs "https://github.com/apache/kafka/archive/$KAFKA_VERSION.tar.gz" | tar -xzf - --strip-components=1 -C ./kafka-build; \
-  cd kafka-build; \
-  ls -la
+  mkdir build-kafka; \
+  curl -SLs "https://github.com/apache/kafka/archive/$KAFKA_VERSION.tar.gz" | tar -xzf - --strip-components=1 -C ./build-kafka; \
+  cd build-kafka; \
+  sed -i "s/scalaVersion=.*/scalaVersion=$SCALA_VERSION/" gradle.properties; \
+  gradle; \
+  #./gradlew test; \
+  ./gradlew jar
 
 RUN mkdir -p /usr/local/kafka/config && touch /usr/local/kafka/config/server.properties