Why does sbt console not see packages from subproject in multi-module project? - scala

Question

This is my project/Build.scala:
package sutils
import sbt._
import Keys._
object SutilsBuild extends Build {
scalaVersion in ThisBuild := "2.10.0"
val scalazVersion = "7.0.6"
lazy val sutils = Project(
id = "sutils",
base = file(".")
).settings(
test := { },
publish := { }, // skip publishing for this root project.
publishLocal := { }
).aggregate(
core
)
lazy val core = Project(
id = "sutils-core",
base = file("sutils-core")
).settings(
libraryDependencies += "org.scalaz" % "scalaz-core_2.10" % scalazVersion
)
}
This seems to be compiling my project just fine, but when I go into the console, I can't import any of the code that just got compiled?!
$ sbt console
scala> import com.github.dcapwell.sutils.validate.Validation._
<console>:7: error: object github is not a member of package com
import com.github.dcapwell.sutils.validate.Validation._
What am I doing wrong here? Trying to look at the usage, I don't see a way to say which subproject to load while in the console
$ sbt about
[info] Loading project definition from /src/sutils/project
[info] Set current project to sutils (in build file:/src/sutils/)
[info] This is sbt 0.13.1
[info] The current project is {file:/src/sutils/}sutils 0.1-SNAPSHOT
[info] The current project is built against Scala 2.10.3
[info] Available Plugins: org.sbtidea.SbtIdeaPlugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.10.3

Answer 1

There's the solution from #Alexey-Romanov to start the console task in the project the classes to import are in.
sbt sutils/console
There's however another solution that makes the root sutils project depend on the other core. Use the following snippet to set up the project - note dependsOn core that will bring the classes from the core project to sutils's namespace.
lazy val sutils = Project(
id = "sutils",
base = file(".")
).settings(
test := { },
publish := { }, // skip publishing for this root project.
publishLocal := { }
).aggregate(
core
).dependsOn core
BTW, you should really use a simpler build.sbt for your use case as follows:
scalaVersion in ThisBuild := "2.10.0"
val scalazVersion = "7.0.6"
lazy val sutils = project.in(file(".")).settings(
test := {},
publish := {}, // skip publishing for this root project.
publishLocal := {}
).aggregate(core).dependsOn(core)
lazy val core = Project(
id = "sutils-core",
base = file("sutils-core")
).settings(
libraryDependencies += "org.scalaz" %% "scalaz-core" % scalazVersion
)
You could make it even easier when you'd split the build to two build.sbts, each for the projects.