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Gradle Executable Container

This docker image includes Oracle Java 7 and Gradle 2.1 configured with Gradle as the entrypoint.

Usage

By defaut, running this image without any command will run gradle -version in the /app directory.

Doing Something Actually Useful

To run something more interesting, say gradle clean war, you should mount your project root in /app. For example, you can run the following to create a deployable web archive.

docker run --rm -v /path/to/your/project:/app:rw niaquinto/gradle clean war

Plugins

Of course, you can use any command here, including those dependent on plugins. For example, if you project inlcudes the Jetty plugin (by including apply plugin: 'jetty' in its build.gradle) you can run the following command to start an instance of Jetty running a WAR of your application on port 8080 on the host.

docker run --rm -p 8080:8080 -v /path/to/your/project:/app:rw niaquinto/gradle jettyRunWar

You can find your app deployed at http://localhost:8080/app

Changing the Default Behavior

Say you want gradle clean war to run if you launch the container without any options. To do that, just make a new dockerfile like the following. Also, while your at it, you should change the user to match your development environment (so that running the container doesn't keep chown'ing your /build directory to root).

# Use this image as a base
FROM niaquinto/gradle
MAINTAINER your-name <[email protected]>

# In case someone loses the Dockerfile
RUN rm -rf /etc/Dockerfile
ADD Dockerfile /etc/Dockerfile

# Add your desired user and group
RUN groupadd your-group-name
RUN useradd -s /bin/bash -m -d /app -g your-group-name your-user-name

# Set your desired user as default
USER your-user-name

# Set your default behavior
ENTRYPOINT ["gradle"]
CMD ["clean", "war"]

Get the Image

To build this image yourself, run...

docker build github.com/niaquinto/docker-gradle

Or, you can pull the image from the central docker repository by using...

docker pull niaquinto/gradle