First you need install g8. See their page for instructions. Then just drop in to a shell:

g8 ripla/vaadin
<answer questions, enter for defaults>
cd <project dir>
sbt
container:start

And browse to http://localhost:8080. You can also type eclipse in the SBT-prompt to create Eclipse project files and import the project to Eclipse as an existing project.

This template creates an SBT project that includes Vaadin. It also includes the SBT-plugins xsbt-web-plugin for Jetty and sbteclipse for creating Eclipse projects.

The build.sbt created by the template contains the necessary (GWT sbt plugin) code to compile the addons.

1. Add a dependency to the add-on to the librarydepencies-section in the build.sbt file
2. Add the GWT module of the add-on to the gwt.xml file in the src directory.
3. Uncomment the GWT-plugin lines in the build.sbt
4. Type gwt-compile in the sbt prompt to compile the widgetset