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package cbt
import java.io.File
import java.net.URL
import java.nio.file.Files
import java.nio.file.attribute.FileTime
trait Dotty extends BaseBuild{
def dottyVersion: String = Dotty.version
def dottyOptions: Seq[String] = Seq()
override def scalaTarget: File = target ++ s"/dotty-$dottyVersion"
def dottyCompiler: DependencyImplementation = Resolver(mavenCentral).bindOne( Dotty.compilerOnMaven( dottyVersion ) )
def dottyLibrary: DependencyImplementation = Resolver(mavenCentral).bindOne( Dotty.libraryOnMaven( dottyVersion ) )
// this seems needed for cbt run of dotty produced artifacts
override def dependencies: Seq[Dependency] = Seq( dottyLibrary )
private lazy val dottyLib = new DottyLib(
context.cbtLastModified, context.paths.mavenCache, dottyCompiler
)
def compileJavaFirst: Boolean = false
// this makes sure the scala or java classes compiled first are available on subsequent compile
override def compileDependencies: Seq[Dependency]
= super.compileDependencies ++ Seq( compileTarget ).filter(_.exists).map( t => BinaryDependency( Seq(t), Nil ) )
override def compile: Option[Long] = taskCache[Dotty]("compile").memoize{
def compileDotty =
dottyLib.compile(
sourceFiles.filter(_.string.endsWith(".scala")),
compileTarget, compileStatusFile, compileDependencies, dottyOptions
)
def compileJava =
lib.compile(
context.cbtLastModified,
sourceFiles.filter(_.string.endsWith(".java")),
compileTarget, compileStatusFile, compileDependencies, context.paths.mavenCache,
scalacOptions, zincVersion = zincVersion, scalaVersion = scalaVersion
)
def set(time: Long) = if(compileStatusFile.exists) Files.setLastModifiedTime(compileStatusFile.toPath, FileTime.fromMillis(time) )
val before = compileStatusFile.lastModified
val firstLastModified = if(compileJavaFirst) compileJava else compileDotty
set( before )
val secondLastModified = if(!compileJavaFirst) compileJava else compileDotty
val min = (firstLastModified ++ secondLastModified).reduceOption(_ min _).getOrElse(0l)
set( min )
Some(min)
}
def dottydoc: ExitCode =
dottyLib.doc(
sourceFiles, compileClasspath, docTarget, dottyOptions
)
override def repl = dottyLib.repl(context.args, classpath)
}
object Dotty{
val groupId = "ch.epfl.lamp"
val version: String = "0.1.1-20170203-da7d723-NIGHTLY"
val libraryArtifactId = "dotty-library_2.11"
val compilerArtifactId = "dotty-compiler_2.11"
val interfacesArtifactId = "dotty-interfaces"
def compilerOnMaven(version: String) = MavenDependency(groupId,compilerArtifactId,version)
def libraryOnMaven(version: String) = MavenDependency(groupId,libraryArtifactId,version)
}
class DottyLib(
cbtLastModified: Long,
mavenCache: File,
dottyCompiler: DependencyImplementation
)(implicit transientCache: java.util.Map[AnyRef,AnyRef], classLoaderCache: ClassLoaderCache, logger: Logger){
val lib = new Lib(logger)
import lib._
def repl(args: Seq[String], classpath: ClassPath) = {
consoleOrFail("Use `cbt direct repl` instead")
dottyCompiler.runMain(
"dotty.tools.dotc.repl.Main",
Seq(
"-bootclasspath",
dottyCompiler.classpath.string,
"-classpath",
classpath.string
) ++ args
)
}
def doc(
sourceFiles: Seq[File],
dependencyClasspath: ClassPath,
docTarget: File,
compileArgs: Seq[String]
): ExitCode = {
if(sourceFiles.isEmpty){
ExitCode.Success
} else {
docTarget.mkdirs
val args = Seq(
// FIXME: can we use compiler dependency here?
"-bootclasspath", dottyCompiler.classpath.string, // FIXME: does this break for builds that don't have scalac dependencies?
"-classpath", dependencyClasspath.string, // FIXME: does this break for builds that don't have scalac dependencies?
"-d", docTarget.toString
) ++ compileArgs ++ sourceFiles.map(_.toString)
logger.lib("creating docs for source files "+args.mkString(", "))
val exitCode = redirectOutToErr{
dottyCompiler.runMain(
"dotty.tools.dottydoc.DocDriver",
args
)
}
System.err.println("done")
exitCode
}
}
def compile(
sourceFiles: Seq[File],
compileTarget: File,
statusFile: File,
dependencies: Seq[Dependency],
dottyOptions: Seq[String]
): Option[Long] = {
val d = Dependencies(dependencies)
val classpath = d.classpath
val cp = classpath.string
def lastModified = (
cbtLastModified +: d.lastModified +: sourceFiles.map(_.lastModified)
).max
if( sourceFiles.isEmpty ){
None
}else{
val start = System.currentTimeMillis
val lastCompiled = statusFile.lastModified
if( lastModified > lastCompiled ){
val _class = "dotty.tools.dotc.Main"
val dualArgs =
Seq(
"-d", compileTarget.toString
)
val singleArgs = dottyOptions.map( "-S" ++ _ )
val code =
try{
System.err.println("Compiling with Dotty to " ++ compileTarget.toString)
compileTarget.mkdirs
redirectOutToErr{
dottyCompiler.runMain(
_class,
dualArgs ++ singleArgs ++ Seq(
"-bootclasspath", dottyCompiler.classpath.string
) ++ (
if(cp.isEmpty) Nil else Seq("-classpath", cp) // let's put cp last. It so long
) ++ sourceFiles.map(_.toString)
)
}
} catch {
case e: Exception =>
System.err.println(red("Dotty crashed. See https://github.com/lampepfl/dotty/issues. To reproduce run:"))
System.err.println(dottyCompiler.classLoader)
System.out.println(s"""
java -cp \\
${dottyCompiler.classpath.strings.mkString(":\\\n")} \\
\\
${_class} \\
\\
${dualArgs.grouped(2).map(_.mkString(" ")).mkString(" \\\n")} \\
\\
${singleArgs.mkString(" \\\n")} \\
\\
-bootclasspath \\
${dottyCompiler.classpath.strings.mkString(":\\\n")} \\
${if(cp.isEmpty) "" else (" -classpath \\\n" ++ classpath.strings.mkString(":\\\n"))} \\
\\
${sourceFiles.sorted.mkString(" \\\n")}
"""
)
throw e
}
if(code == ExitCode.Success){
// write version and when last compilation started so we can trigger
// recompile if cbt version changed or newer source files are seen
write(statusFile, "")//cbtVersion.getBytes)
Files.setLastModifiedTime(statusFile.toPath, FileTime.fromMillis(start) )
} else {
System.exit(code.integer) // FIXME: let's find a better solution for error handling. Maybe a monad after all.
}
Some( start )
} else {
Some( lastCompiled )
}
}
}
}
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