sbt-native-packager and RPM - how do I set required parameters? - scala

Question

I'm finding it diffuclt to build a Play project using the sbt native packager. I don't know where to set the RPM configuration when I am given the following error:
[error] `rpmVendor in Rpm` is empty. Please provide a valid vendor for the rpm SPEC.
[error] `packageSummary in Rpm` is empty. Please provide a valid summary for the rpm SPEC.
[error] `packageDescription in Rpm` is empty. Please provide a valid description for the rpm SPEC.
I've set the following in project/plugins.sbt:
addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "0.8.0")
In my build.sbt:
name := """supersecretproject"""
version := "1.0-SNAPSHOT"
lazy val root = (project in file(".")).enablePlugins(PlayScala)
scalaVersion := "2.11.1"
libraryDependencies ++= Seq(
jdbc,
anorm,
cache,
ws
)
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.27"
javacOptions ++= Seq("-source", "1.6", "-target", "1.6")
tomcat()
The documentation merely states:
A rpm package needs some mandatory settings to be valid. Make sure you have these settings in your build:
rpmRelease := "1"
rpmVendor := "typesafe"
rpmUrl := Some("http://github.com/paulp/sbt-extras")
rpmLicense := Some("BSD")
Which is almost entirely useless if you don't know SBT very well! How do I "have these settings in your build:" as the documentation instructs?
I've tried adding the above "settings" to build.sbt or a separate packageSettings.sbt but with no luck as I just get the following error:
error: not found: value rpmRelease
rpmRelease := "1"
^
[error] Type error in expression
Note: I run the sbt using sbt rpm:packageBin

Answer 1

It sounds like the developers of that plugin are trying to not be too prescriptive, but in doing so have not given you enough information to even get started! :-(
The simplest possible solution: Copy those four settings (including the blank lines between) into your build.sbt.
A logical place is probably towards the bottom of the file, as "packaging" your app is something that happens "towards the end" of the development cycle.
Another option: SBT automatically combines the contents of all .sbt files it finds in the project root. So if you prefer, you could create a new file such as packagingSettings.sbt and put those settings in there.
Edit: Help with imports:
Whichever option you choose, you'll need to add the following imports at the top of the file (as per the getting started guide):
import com.typesafe.sbt.SbtNativePackager._
import NativePackagerKeys._