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package cbt
import cbt.paths._
import java.io._
import java.net._
import java.nio.file._
import javax.tools._
import java.security._
import java.util._
import javax.xml.bind.annotation.adapters.HexBinaryAdapter
import scala.collection.immutable.Seq
case class Context( cwd: String, args: Seq[String], logger: Logger )
case class ClassPath(files: Seq[File]){
private val duplicates = (files diff files.distinct).distinct
assert(
duplicates.isEmpty,
"Duplicate classpath entries found:\n" + duplicates.mkString("\n") + "\nin classpath:\n"+string
)
private val nonExisting = files.distinct.filterNot(_.exists)
assert(
duplicates.isEmpty,
"Classpath contains entires that don't exist on disk:\n" + nonExisting.mkString("\n") + "\nin classpath:\n"+string
)
def +:(file: File) = ClassPath(file +: files)
def :+(file: File) = ClassPath(files :+ file)
def ++(other: ClassPath) = ClassPath(files ++ other.files)
def string = strings.mkString( File.pathSeparator )
def strings = files.map{
f => f.toString + ( if(f.isDirectory) "/" else "" )
}
def toConsole = string
}
object ClassPath{
def flatten( classPaths: Seq[ClassPath] ): ClassPath = ClassPath( classPaths.map(_.files).flatten )
}
class Stage1Lib( val logger: Logger ){
lib =>
// ========== reflection ==========
/** Create instance of the given class via reflection */
def create(cls: String)(args: Any*)(classLoader: ClassLoader): Any = {
logger.composition( logger.showInvocation("Stage1Lib.create", (classLoader,cls,args)) )
import scala.reflect.runtime.universe._
val m = runtimeMirror(classLoader)
val sym = m.classSymbol(classLoader.loadClass(cls))
val cm = m.reflectClass( sym.asClass )
val tpe = sym.toType
val ctorm = cm.reflectConstructor( tpe.decl(termNames.CONSTRUCTOR).asMethod )
ctorm(args:_*)
}
// ========== file system / net ==========
def array2hex(padTo: Int, array: Array[Byte]): String = {
val hex = new java.math.BigInteger(1, array).toString(16)
("0" * (padTo-hex.size)) + hex
}
def md5( bytes: Array[Byte] ): String = array2hex(32, MessageDigest.getInstance("MD5").digest(bytes))
def sha1( bytes: Array[Byte] ): String = array2hex(40, MessageDigest.getInstance("SHA-1").digest(bytes))
def red(string: String) = scala.Console.RED+string+scala.Console.RESET
def blue(string: String) = scala.Console.BLUE+string+scala.Console.RESET
def green(string: String) = scala.Console.GREEN+string+scala.Console.RESET
def download(urlString: URL, target: Path, sha1: Option[String]){
val incomplete = Paths.get(target+".incomplete");
if( !Files.exists(target) ){
new File(target.toString).getParentFile.mkdirs
logger.resolver(blue("downloading ")+urlString)
logger.resolver(blue("to ")+target)
val stream = urlString.openStream
Files.copy(stream, incomplete, StandardCopyOption.REPLACE_EXISTING)
sha1.foreach{
hash =>
val expected = hash
val actual = this.sha1(Files.readAllBytes(incomplete))
assert( expected == actual, s"$expected == $actual" )
logger.resolver(green("verified")+" checksum for "+target)
}
stream.close
Files.move(incomplete, target, StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.ATOMIC_MOVE);
}
}
def listFilesRecursive(f: File): Seq[File] = {
f +: (
if( f.isDirectory ) f.listFiles.flatMap(listFilesRecursive).toVector else Seq[File]()
)
}
// ========== compilation / execution ==========
def runMainIfFound(cls: String, args: Seq[String], classLoader: ClassLoader ){
if( classLoader.canLoad(cls) ) runMain(cls: String, args: Seq[String], classLoader: ClassLoader )
}
def runMain(cls: String, args: Seq[String], classLoader: ClassLoader ){
logger.lib(s"Running $cls.main($args) with classLoader: "+classLoader)
classLoader
.loadClass(cls)
.getMethod( "main", scala.reflect.classTag[Array[String]].runtimeClass )
.invoke( null, args.toArray.asInstanceOf[AnyRef] );
}
implicit class ClassLoaderExtensions(classLoader: ClassLoader){
def canLoad(className: String) = {
try{
classLoader.loadClass(className)
true
} catch {
case e: ClassNotFoundException => false
}
}
}
def zinc(
needsRecompile: Boolean, files: Seq[File], compileTarget: File, classpath: ClassPath, extraArgs: Seq[String] = Seq()
)( zincVersion: String, scalaVersion: String ): Unit = {
val cp = classpath.string
if(classpath.files.isEmpty) throw new Exception("Trying to compile with empty classpath. Source files: "+files)
if(files.isEmpty) throw new Exception("Trying to compile no files. ClassPath: "+cp)
// only run zinc if files changed, for performance reasons
// FIXME: this is broken, need invalidate on changes in dependencies as well
if( true || needsRecompile ){
val zinc = MavenDependency("com.typesafe.zinc","zinc", zincVersion)(logger)
val zincDeps = zinc.transitiveDependencies
val sbtInterface =
zincDeps
.collect{ case d @ MavenDependency( "com.typesafe.sbt", "sbt-interface", _, false ) => d }
.headOption
.getOrElse( throw new Exception(s"cannot find sbt-interface in zinc $zincVersion dependencies") )
.jar
val compilerInterface =
zincDeps
.collect{ case d @ MavenDependency( "com.typesafe.sbt", "compiler-interface", _, true ) => d }
.headOption
.getOrElse( throw new Exception(s"cannot find compiler-interface in zinc $zincVersion dependencies") )
.jar
val scalaLibrary = MavenDependency("org.scala-lang","scala-library",scalaVersion)(logger).jar
val scalaReflect = MavenDependency("org.scala-lang","scala-reflect",scalaVersion)(logger).jar
val scalaCompiler = MavenDependency("org.scala-lang","scala-compiler",scalaVersion)(logger).jar
redirectOutToErr{
lib.runMain(
"com.typesafe.zinc.Main",
Seq(
"-scala-compiler", scalaCompiler.toString,
"-scala-library", scalaLibrary.toString,
"-sbt-interface", sbtInterface.toString,
"-compiler-interface", compilerInterface.toString,
"-scala-extra", scalaReflect.toString,
"-cp", cp,
"-d", compileTarget.toString
) ++ extraArgs.map("-S"+_) ++ files.map(_.toString),
zinc.classLoader
)
}
}
}
def redirectOutToErr[T](code: => T): Unit = {
val oldOut = System.out
try{
System.setOut(System.err)
code
} finally{
System.setOut(oldOut)
}
}
}
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