A plugin for sbt-0.(10|11).x that transforms *.proto files into gazillion-loc java files.

In your project, create a file for plugin library dependencies project/plugins/build.sbt and add the following lines:

resolvers  = "gseitz@github" at "http://gseitz.github.com/maven/"

libraryDependencies  = "com.github.gseitz" %% "sbt-protobuf" % "0.2"

resolvers  = "gseitz@github" at "http://gseitz.github.com/maven/"

addSbtPlugin("com.github.gseitz" % "sbt-protobuf" % "0.2.2")

To actually "activate" the plugin, its settings need to be included in the build.

import sbtprotobuf.{ProtobufPlugin=>PB}

seq(PB.protobufSettings: _*)

import sbtprotobuf.{ProtobufPlugin=>PB}

object MyBuild extends Build {
  lazy val MyProject(
    id = "myproject",
    base = file("."),
    settings = Defaults.defaultSettings    PB.protobufSettings    Seq( /* custom settings here */ )
  )
}

Assuming an artifact contains both *.proto files as well as the binaries of the generated *.java files, you can specify the dependency like so:

libraryDependencies  = "some.groupID" % "some.artifactID" % "1.0" % PB.protobufConfig.name // #1

libraryDependencies  = "some.groupID" % "some.artifactID" % "1.0" // #2

Line #1 tells sbt-protobuf that the specified artifact contains *.proto files which it needs to extract and add to the includePath for protoc.

Line #2 adds the artifact to the regular compile:libraryDependencies.

The *.proto files of dependencies are extracted and added to the includePath parameter for protoc, but are not compiled.

*.proto files can be included in the jar file by adding the following setting to your build definition:

unmanagedResourceDirectories in Compile < = (sourceDirectory in PB.protobufConfig).identity,

By default, the compiled proto files are created in <project-dir>/target/<scala-version>/src_managed/main/compiled_protobuf. Changing the location to <project-dir>/src/generated can be done by adding the following setting to your build definition:

javaSource in PB.protobufConfig <<= (sourceDirectory in Compile)(_ / "generated")

WARNING: The content of this directory is removed by the clean task. Don't set it to a directory containing files you hold dear to your heart.

All settings and tasks are in the protobuf scope. If you want to execute the generate task directly, just run protobuf:generate.

sbt-protobuf is based on softprops/coffeescripted-sbt for the sbt-0.10 specific parts and codahale/protobuf-sbt for the protobuf specifics.