Scala Docker Image

Introduction

1. Dockerhub: ysihaoy/scala
2. Docker image for Scala and SBT project with different version combinations

Supported tags (combinations of Scala and SBT) and Dockerfile links

• 2.12.4-sbt-1.0.4, Dockerfile

• 2.12.3-sbt-1.0.0, Dockerfile

• 2.12.2-sbt-1.0.0.rc2, Dockerfile

• 2.12.2-sbt-0.13.15, Dockerfile

• 2.12.0-sbt-0.13.13, Dockerfile

• 2.11.8-sbt-0.13.11, Dockerfile

How to use in your Scala SBT project

1. Sample of your minimal project structure

your-scala-project
│   build.sbt
│   Dockerfile
│
├───project
|       build.properties
|       plugins.sbt
|
└───src
    ├───main
    │   │   ...
    │
    └───test

2. Sample of your Dockerfile should be like:

FROM ysihaoy/scala:2.12.4-sbt-1.0.4

# caching dependencies
COPY ["build.sbt", "/tmp/build/"]
COPY ["project/plugins.sbt", "project/build.properties", "/tmp/build/project/"]
RUN cd /tmp/build && \
  sbt compile && \
  sbt test:compile && \
  rm -rf /tmp/build

# copy source code
COPY . /root/app/
WORKDIR /root/app
RUN sbt compile && sbt test:compile

CMD ["sbt"]

Optimisation of the build

In order to have fast CI (continuous integration) build process, sample of your project/build.properties and build.sbt should be like:

1. project/build.properties

sbt.version = 1.0.4

2. build.sbt

scalaVersion := "2.12.4"

You are an awesome Scala developer :-)