project/plugins.sbt (4 lines of code) (raw):
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.3.1")
addSbtPlugin("com.gu" % "sbt-riffraff-artifact" % "1.1.18")
addSbtPlugin("org.scalariform" % "sbt-scalariform" % "1.8.3")
addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.10.0-RC1")