Scala 如何向SBT项目添加示例？

我想在Scala库中添加一些示例。我更喜欢这样的目录布局：

examples/
    example1/
        Main.scala
        ...
    example2/
        Main.scala
        ...
src/
    main/
        scala/
            ...
    test/
        scala/
            ...
build.sbt

---

示例使用

src/main/scala/

中的包。是否可以使用SBT构建和运行示例？也可能有特定于示例的依赖项吗？

也可能，但您可能需要使用complete.scala定义

以下是展示：

// [info] Loading global plugins from /Users/omnomnom/.sbt/0.13/plugins
// [info] Loading project definition from /Users/omnomnom/projects/example-of-examples/project
// [info] Set current project to root-project (in build file:/Users/omnomnom/projects/example-of-examples/)
> projects
// [info] In file:/Users/omnomnom/projects/example-of-examples/
// [info]      example1
// [info]      example2
// [info]    * root-project
> project example1
// [info] Set current project to example1 (in build file:/Users/omnomnom/projects/example-of-examples/)
> run
// [info] Updating {file:/Users/omnomnom/projects/example-of-examples/}root-project...
// [info] Resolving org.fusesource.jansi#jansi;1.4 ...
// [info] Done updating.
// [info] Updating {file:/Users/omnomnom/projects/example-of-examples/}example1...
// [info] Resolving org.fusesource.jansi#jansi;1.4 ...
// [info] Done updating.
// [info] Compiling 1 Scala source to /Users/omnomnom/projects/example-of-examples/target/scala-2.10/classes...
// [info] Running Main 
I'm example #1
// [success] Total time: 4 s, completed Jul 4, 2014 10:17:54 PM
> project example2
// [info] Set current project to example2 (in build file:/Users/omnomnom/projects/example-of-examples/)
> run
// [info] Updating {file:/Users/omnomnom/projects/example-of-examples/}example2...
// [info] Resolving org.fusesource.jansi#jansi;1.4 ...
// [info] Done updating.
// [info] Compiling 1 Scala source to /Users/omnomnom/projects/example-of-examples/examples/example2/target/scala-2.10/classes...
// [info] Running Main 
I'm example #2
// [success] Total time: 3 s, completed Jul 4, 2014 10:18:04 PM

和Build.scala，仅针对这种情况：

import sbt._
import Keys._

object Build extends Build {

  override lazy val settings = super.settings ++ Seq(
    scalacOptions ++= Seq("-unchecked", "-deprecation", "-Xlint"),
    organization := "me.lazyval",
    scalaVersion := "2.10.4",
    initialCommands in console := "import me.lazyval._"
  )

  // altering source path, since you don't want to replicate usual src/main ... stuff
  val exampleSourcePath = scalaSource in Compile := baseDirectory.value / "."

  lazy val root = Project(id = "root-project", base = file("."), settings = Project.defaultSettings ++ settings)

  lazy val example1 = Project(id = "example1", base = file("./examples/example1"), settings = Project.defaultSettings ++ settings ++ Seq(exampleSourcePath)) dependsOn root
  // in `settings= ...` section you can set whatever dependencies you like 
  lazy val example2 = Project(id = "example2", base = file("./examples/example2"), settings = Project.defaultSettings ++ settings ++ Seq(exampleSourcePath)) dependsOn root
}

---

您可能希望将示例作为一个“子项目”，它取决于主项目。从sbt 0.13开始，您可以在

build.sbt

中定义

val

s、

lazy val

s和子项目。您不需要

Build.scala

。请看@sjrd cool，我不知道这一点（我通常避免使用0.13，因为它有一些bug）