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DottySupport.scala
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DottySupport.scala
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package scala.build
import sbt._
import sbt.Keys._
import java.io.File
import sbt.librarymanagement.{
ivy, DependencyResolution, ScalaModuleInfo, UpdateConfiguration, UnresolvedWarningConfiguration
}
/**
* Settings to support validation of TastyUnpickler against the release of dotty with the matching TASTy version
*/
object TastySupport {
val supportedTASTyRelease = "3.0.0-RC1" // TASTy version 28.0.1
val scala3Compiler = "org.scala-lang" % "scala3-compiler_3.0.0-RC1" % supportedTASTyRelease
}
/** Settings needed to compile with Dotty,
* Only active when sbt is started with `sbt -Dscala.build.compileWithDotty=true`
* This is currently only used to check that the standard library compiles with
* Dotty in .travis.yml.
*/
object DottySupport {
val dottyVersion = "3.0.0-M3"
val compileWithDotty: Boolean =
Option(System.getProperty("scala.build.compileWithDotty")).map(_.toBoolean).getOrElse(false)
lazy val commonSettings = Seq(
Compile / scalacOptions ++= Seq(
"-language:implicitConversions" // Avoid a million warnings
)
)
lazy val librarySettings = Seq(
// Needed to compile scala3-library together with scala-library
compileOrder := CompileOrder.Mixed,
// Add the scala3-library sources to the sourcepath
Compile / scalacOptions := {
val old = (Compile / scalacOptions).value
val (beforeSourcepath, "-sourcepath" :: oldSourcepath :: afterSourcePath) = old.span(_ != "-sourcepath")
val newSourcepath =
((Compile / sourceManaged).value / "scala3-library-src").getAbsolutePath +
File.pathSeparator + oldSourcepath
beforeSourcepath ++ ("-sourcepath" :: newSourcepath :: afterSourcePath)
},
Compile / scalacOptions ++= Seq(
"-Yerased-terms" // needed to compile scala3-library
),
// Some files shouldn't be compiled
unmanagedSources / excludeFilter ~= (old =>
old ||
"AnyVal.scala"
),
// Add the sources of scala3-library to the current project to compile the
// complete standard library of Dotty in one go.
// Adapted from similar code in the scala-js build.
Compile / sourceGenerators += Def.task {
object DottyLibrarySourceFilter extends FileFilter {
def accept(file: File): Boolean = {
val name = file.name
val path = file.getCanonicalPath
file.isFile &&
(path.endsWith(".scala") || path.endsWith(".java"))
}
}
val s = streams.value
val cacheDir = s.cacheDirectory
val trgDir = (Compile / sourceManaged).value / "scala3-library-src"
val dottyLibrarySourceJar = fetchSourceJarOf(
dependencyResolution.value,
scalaModuleInfo.value,
updateConfiguration.value,
(update / unresolvedWarningConfiguration).value,
streams.value.log,
scalaOrganization.value %% "scala3-library" % scalaVersion.value)
FileFunction.cached(cacheDir / s"fetchDottyLibrarySource",
FilesInfo.lastModified, FilesInfo.exists) { dependencies =>
s.log.info(s"Unpacking scala3-library sources to $trgDir...")
if (trgDir.exists)
IO.delete(trgDir)
IO.createDirectory(trgDir)
IO.unzip(dottyLibrarySourceJar, trgDir)
(trgDir ** DottyLibrarySourceFilter).get.toSet
} (Set(dottyLibrarySourceJar)).toSeq
}.taskValue
)
/** Fetch source jar for `moduleID` */
def fetchSourceJarOf(
dependencyRes: DependencyResolution,
scalaInfo: Option[ScalaModuleInfo],
updateConfig: UpdateConfiguration,
warningConfig: UnresolvedWarningConfiguration,
log: Logger,
moduleID: ModuleID): File = {
val sourceClassifiersConfig = sbt.librarymanagement.GetClassifiersConfiguration(
sbt.librarymanagement.GetClassifiersModule(
moduleID,
scalaInfo,
Vector(moduleID),
Vector(Configurations.Default) ++ Configurations.default,
Vector("sources")
),
Vector.empty,
updateConfig.withArtifactFilter(
librarymanagement.ArtifactTypeFilter.allow(Artifact.DefaultSourceTypes)
),
Artifact.DefaultSourceTypes.toVector,
Vector.empty
)
dependencyRes.updateClassifiers(sourceClassifiersConfig, warningConfig, Vector.empty, log) match {
case Right(report) =>
val Vector(jar) = report.allFiles
jar
case _ =>
throw new MessageOnlyException(
s"Couldn't retrieve `$moduleID`.")
}
}
}