mirror of https://github.com/sbt/sbt.git
39 lines
1.8 KiB
Scala
39 lines
1.8 KiB
Scala
/* sbt -- Simple Build Tool
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* Copyright 2009 Mark Harrah
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*/
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package xsbt.boot
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import BootConfiguration.{IvyPackage, JLinePackagePath, SbtBootPackage, ScalaPackage}
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import scala.collection.immutable.Stream
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/** A custom class loader to ensure the main part of sbt doesn't load any Scala or
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* Ivy classes from the jar containing the loader. */
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private[boot] final class BootFilteredLoader(parent: ClassLoader) extends ClassLoader(parent)
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{
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@throws(classOf[ClassNotFoundException])
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override final def loadClass(className: String, resolve: Boolean): Class[_] =
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{
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// note that we allow xsbti.* and jline.*
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if(className.startsWith(ScalaPackage) || className.startsWith(IvyPackage) || className.startsWith(SbtBootPackage))
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throw new ClassNotFoundException(className)
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else
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super.loadClass(className, resolve)
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}
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override def getResources(name: String) = if(includeResource(name)) super.getResources(name) else excludedLoader.getResources(name)
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override def getResource(name: String) = if(includeResource(name)) super.getResource(name) else excludedLoader.getResource(name)
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def includeResource(name: String) = name.startsWith(JLinePackagePath)
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// the loader to use when a resource is excluded. This needs to be at least parent.getParent so that it skips parent. parent contains
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// resources included in the launcher, which need to be ignored. Now that launcher can be unrooted (not the application entry point),
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// this needs to be the Java extension loader (the loader with getParent == null)
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private val excludedLoader = Loaders(parent.getParent).head
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}
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object Loaders
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{
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def apply(loader: ClassLoader): Stream[ClassLoader] =
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{
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def loaders(loader: ClassLoader, accum: Stream[ClassLoader]): Stream[ClassLoader] =
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if(loader eq null) accum else loaders(loader.getParent, Stream.cons(loader, accum))
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loaders(getClass.getClassLoader.getParent, Stream.empty)
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}
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} |