为什么sbt控制台看不到多模块项目中子项目的软件包？

ekaqu 发表于 Dev

叶卡

这是我的项目/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
  )
}

这似乎可以很好地编译我的项目，但是当我进入控制台时，我无法导入刚刚编译的任何代码？

$ 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._

我在这里做错了什么？试图查看用法，我看不到在控制台中说要加载哪个子项目的方法

$ 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

杰西克·拉斯考夫斯基（Jacek Laskowski）

@ Alexey-Romanov提供了一种解决方案，console可以在要导入类的项目中启动任务。

sbt sutils/console

但是，还有另一个解决方案使根sutils项目依赖于另一个项目core。使用以下代码片段设置项目-注意dependsOn core，这会将类从core项目移到sutils的名称空间。

lazy val sutils = Project(
  id = "sutils",
  base = file(".")
).settings(
  test := { },
  publish := { }, // skip publishing for this root project.
  publishLocal := { }
).aggregate(
  core
).dependsOn core

顺便说一句，您实际上应该build.sbt为您的用例使用一个更简单的方法，如下所示：

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
)