forked from scala/scala
-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Read plugin descriptor via Classloader.getResource
This lets customized Global's deliver this file, and offloads the scanning logic.
- Loading branch information
Showing
6 changed files
with
148 additions
and
93 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
71 changes: 71 additions & 0 deletions
71
test/junit/scala/tools/nsc/GlobalCustomizeClassloaderTest.scala
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package scala.tools.nsc | ||
|
|
||
| import org.junit.{Assert, Test} | ||
| import org.junit.runner.RunWith | ||
| import org.junit.runners.JUnit4 | ||
|
|
||
| import scala.reflect.internal.util.{AbstractFileClassLoader, NoSourceFile} | ||
| import scala.reflect.io.{Path, VirtualDirectory} | ||
| import scala.tools.nsc.plugins.{Plugin, PluginComponent} | ||
|
|
||
| @RunWith(classOf[JUnit4]) | ||
| class GlobalCustomizeClassloaderTest { | ||
| // Demonstrate extension points to customise creation of the classloaders used to load compiler | ||
| // plugins and macro implementations. | ||
| // | ||
| // A use case could be for a build tool to take control of caching of these classloaders in a way | ||
| // that properly closes them before one of the elements needs to be overwritten. | ||
| @Test def test(): Unit = { | ||
| val g = new Global(new Settings) { | ||
| override protected[scala] def findMacroClassLoader(): ClassLoader = getClass.getClassLoader | ||
| override protected def findPluginClassLoader(classpath: Seq[Path]): ClassLoader = { | ||
| val d = new VirtualDirectory("", None) | ||
| val xml = d.fileNamed("scalac-plugin.xml") | ||
| val out = xml.bufferedOutput | ||
| out.write( | ||
| s"""<plugin> | ||
| |<name>sample-plugin</name> | ||
| |<classname>${classOf[SamplePlugin].getName}</classname> | ||
| |</plugin> | ||
| |""".stripMargin.getBytes()) | ||
| out.close() | ||
| new AbstractFileClassLoader(d, getClass.getClassLoader) | ||
| } | ||
| } | ||
| g.settings.usejavacp.value = true | ||
| g.settings.plugin.value = List("sample") | ||
| new g.Run | ||
| assert(g.settings.log.value == List("typer")) | ||
|
|
||
| val unit = new g.CompilationUnit(NoSourceFile) | ||
| val context = g.analyzer.rootContext(unit) | ||
| val typer = g.analyzer.newTyper(context) | ||
| import g._ | ||
| SampleMacro.data = "in this classloader" | ||
| val typed = typer.typed(q"scala.tools.nsc.SampleMacro.m") | ||
| assert(!reporter.hasErrors) | ||
| typed match { | ||
| case Typed(Literal(Constant(s: String)), _) => Assert.assertEquals(SampleMacro.data, s) | ||
| case _ => Assert.fail() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| object SampleMacro { | ||
| var data: String = _ | ||
| import language.experimental.macros | ||
| import scala.reflect.macros.blackbox.Context | ||
| def m: String = macro impl | ||
| def impl(c: Context): c.Tree = c.universe.Literal(c.universe.Constant(data)) | ||
| } | ||
|
|
||
| class SamplePlugin(val global: Global) extends Plugin { | ||
| override val name: String = "sample" | ||
| override val description: String = "sample" | ||
| override val components: List[PluginComponent] = Nil | ||
| override def init(options: List[String], error: String => Unit): Boolean = { | ||
| val result = super.init(options, error) | ||
| global.settings.log.value = List("typer") | ||
| result | ||
| } | ||
| } |