Docker with fat jar

Author: cascala

Dockerfile

@@ -1,4 +1,5 @@
-FROM openjdk:8
+# Start from openjdk and name this stage 'build'
+FROM openjdk:8 AS build
 
 ENV SBT_VERSION 0.13.12
 
@@ -10,8 +11,18 @@ RUN \
   apt-get install sbt && \
   sbt sbtVersion
 
-  WORKDIR /galileo
+WORKDIR /galileo
+
+ADD . /galileo
+
+# This works inside the docker image; not locally (at least not for me)
+RUN sbt assembly
+
+
+FROM openjdk:8
+COPY --from=build \
+    /galileo/target/scala-2.12/Galileo-assembly-0.1.2.jar galileo.jar
+
+CMD [ "java", "-jar", "galileo.jar" ]
 
-  ADD . /galileo
 
-  CMD sbt run

build.sbt

@@ -1,24 +1,20 @@
 organization := "com.github.cascala"
-
 name := "Galileo"
-
-version := "0.1.2-SNAPSHOT"
-
-scalaVersion := "2.11.8"
-
+version := "0.1.2"
+scalaVersion := "2.12.8"
 scalacOptions ++= Seq( "-deprecation", "-feature" )
-
-libraryDependencies += "org.scalatest" % "scalatest_2.11" % "2.2.1" % "test"
-
-libraryDependencies += "org.jline" % "jline" % "3.7.0"
-
-libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "1.0.2"
+libraryDependencies += "org.scalatest" % "scalatest_2.12" % "3.0.8" % "test"
+libraryDependencies += "org.jline" % "jline" % "3.13.1"
+libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "1.1.2"
 
 // Publication to Sonatype Ivy - artefacts
 // Maven
-
+resolvers += "Artima Maven Repository" at "http://repo.artima.com/releases"
 resolvers += Resolver.url("scalasbt", new URL("http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases")) (Resolver.ivyStylePatterns)
+resolvers += Resolver.url("sbt-assembly", new URL("https://dl.bintray.com/sbt/sbt-plugin-releases")) (Resolver.ivyStylePatterns)
 
+//lazy val util = enablePlugins(AssemblyPlugin).settings(site.settings)
+  
 publishMavenStyle := true
 
 publishTo := { 

project/assembly.sbt

@@ -0,0 +1 @@
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.7" )