在eclipse插件中使用classpathTransformerFactories来排除Scala库

Question

我在单独的模块中提取Scala Swing应用程序。我不想在类路径中有来自IDE的Scala Library，因为它还包括Scala Swing。

我更改了以下classpathentry

<classpathentry
  kind="con"
  path="org.scala-ide.sdt.launching.SCALA_CONTAINER"/>

<classpathentry
  sourcepath="C:Userswwagner.ivy2cacheorg.scala-langscala-librarysrcsscala-library-2.10.3-sources.jar" 
  kind="lib" 
  path="C:Userswwagner.ivy2cacheorg.scala-langscala-libraryjarsscala-library-2.10.3.jar"/>

按预期工作，但我发现sbteclipse插件支持classpathTransformerFactories，它可以自动完成。

classpathTransformerFactories如何帮助我用例?

Answer 1

我要做的是在Build.scala

中实现以下内容

  // sbteclipse rewrite rules
  object ClasspathentryRewriteRule extends RewriteRule {
    override def transform(parent: Node): Seq[Node] = {
      parent match {
        case c @ <classpathentry/> if (c  "@path").toString().endsWith("SCALA_CONTAINER") =>
          val home = System.getProperty("user.home")
          val base = s"""$home\.ivy2\cache\org.scala-lang\scala-library"""
          val srcPath = s"""${base}\srcs\scala-library-${D.scalaVersion}-sources.jar"""
          val path = s"""${base}\jars\scala-library-${D.scalaVersion}.jar"""
          <classpathentry sourcepath={ srcPath } kind="lib" path={ path }/>
        case other => other
      }
    }
  }
  // sbteclipse transformer
  object ClasspathentryTransformer extends EclipseTransformerFactory[RewriteRule] {
    override def createTransformer(ref: ProjectRef, state: State): Validation[RewriteRule] = {
      ClasspathentryRewriteRule.success
    }
  }

在设置中，以下代码完成了该工作:

      ....
      EclipseKeys.classpathTransformerFactories := Seq(ClasspathentryTransformer)
      ....