SBT 中的子项目依赖关系

发布于 2024-11-08 03:00:01 字数 1279 浏览 4 评论 0原文

我在 SBT 子项目上遇到了一个奇怪的问题，我认为这与依赖关系有关。这是我的设置：

我有一个包含两个子项目 A 和 B 的 SBT 项目。A
包含一个类和伴生对象 MyA
B 依赖于 A。B
包含一个对象 MyB ，该对象具有一个主要方法。

当我尝试从 SBT 提示符执行 MyB 时，我在 MyA 上收到 NoSuchMethodError。这不是 ClassNotFoundException，但可能是因为它在类路径上看到了 MyA 类，而不是 MyA 对象。

作为健全性检查，我删除了 B 子项目并将其源代码移至 A 源代码树中。当我从 SBT 提示符运行 MyB 时，它按预期工作。

有没有人遇到过这个，或者我做错了什么明显的事情？

这是我的项目配置：

class MyProject(info: ProjectInfo) extends ParentProject(info) {

  lazy val a = project("a", "a", new AProject(_))
  lazy val b = project("b", "b", new BProject(_), a)

  object Dependencies {
    lazy val scalaTest = "org.scalatest" % "scalatest_2.9.0" % "1.4.1" % "test"
  }

  class AProject(info: ProjectInfo) extends DefaultProject(info) with AutoCompilerPlugins {
    val scalaTest = Dependencies.scalaTest
    val continuationsPlugin = compilerPlugin("org.scala-lang.plugins" % "continuations" % "2.9.0")
    override def compileOptions = super.compileOptions ++ compileOptions("-P:continuations:enable") ++ compileOptions("-unchecked")
  }

  class BProject(info: ProjectInfo) extends DefaultProject(info)

}

原文

I am having a strange problem with SBT subprojects which I think is dependency related. Here's my setup:

I have an SBT project with two subprojects A and B.
A contains a class and companion object MyA
B depends on A.
B contains an object MyB which has a main method.

When I try to execute MyB from the SBT prompt, I get a NoSuchMethodError on MyA. This is not a ClassNotFoundException, but maybe it's happening because it sees the MyA class on the classpath, but not the MyA object.

As a sanity check, I dropped the B subproject and moved its source into the A source tree. When I run MyB from the SBT prompt, it works as expected.

Has anyone run into this, or am I doing something obviously wrong?

Here is my project configuration:

class MyProject(info: ProjectInfo) extends ParentProject(info) {

  lazy val a = project("a", "a", new AProject(_))
  lazy val b = project("b", "b", new BProject(_), a)

  object Dependencies {
    lazy val scalaTest = "org.scalatest" % "scalatest_2.9.0" % "1.4.1" % "test"
  }

  class AProject(info: ProjectInfo) extends DefaultProject(info) with AutoCompilerPlugins {
    val scalaTest = Dependencies.scalaTest
    val continuationsPlugin = compilerPlugin("org.scala-lang.plugins" % "continuations" % "2.9.0")
    override def compileOptions = super.compileOptions ++ compileOptions("-P:continuations:enable") ++ compileOptions("-unchecked")
  }

  class BProject(info: ProjectInfo) extends DefaultProject(info)

}

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许一世地老天荒 2024-11-15 03:00:01

事实证明，在项目 B 上启用延续插件时出现问题。这是我的工作配置：

class MyProject(info: ProjectInfo) extends ParentProject(info) {

  lazy val a = project("a", "a", new AProject(_))
  lazy val b = project("b", "b", new BProject(_), a)

  object Dependencies {
    lazy val scalaTest = "org.scalatest" % "scalatest_2.9.0" % "1.4.1" % "test"
  }

  class AProject(info: ProjectInfo) extends DefaultProject(info) with AutoCompilerPlugins {
    val scalaTest = Dependencies.scalaTest
    val continuationsPlugin = compilerPlugin("org.scala-lang.plugins" % "continuations" % "2.9.0")
    override def compileOptions = super.compileOptions ++ compileOptions("-P:continuations:enable") ++ compileOptions("-unchecked")
  }

  class BProject(info: ProjectInfo) extends DefaultProject(info) with AutoCompilerPlugins {
    override def compileOptions = super.compileOptions ++ compileOptions("-P:continuations:enable") ++ compileOptions("-unchecked")
  }

}

It turns out to have been a problem enabling the continuations plugin on project B. Here's my working configuration:

class MyProject(info: ProjectInfo) extends ParentProject(info) {

  lazy val a = project("a", "a", new AProject(_))
  lazy val b = project("b", "b", new BProject(_), a)

  object Dependencies {
    lazy val scalaTest = "org.scalatest" % "scalatest_2.9.0" % "1.4.1" % "test"
  }

  class AProject(info: ProjectInfo) extends DefaultProject(info) with AutoCompilerPlugins {
    val scalaTest = Dependencies.scalaTest
    val continuationsPlugin = compilerPlugin("org.scala-lang.plugins" % "continuations" % "2.9.0")
    override def compileOptions = super.compileOptions ++ compileOptions("-P:continuations:enable") ++ compileOptions("-unchecked")
  }

  class BProject(info: ProjectInfo) extends DefaultProject(info) with AutoCompilerPlugins {
    override def compileOptions = super.compileOptions ++ compileOptions("-P:continuations:enable") ++ compileOptions("-unchecked")
  }

}

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