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Added an incredibly hacky way for us to override the default sbt comp…

…iler interface.
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jsuereth committed Apr 3, 2012
1 parent 4467438 commit 31546d1b3d841a0fddc9c84af48361c74243ce8e
Showing with 149 additions and 1 deletion.
  1. +1 −1 project/Build.scala
  2. +148 −0 project/CheatingComponentCompiler.scala
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@@ -170,7 +170,7 @@ object ScalaBuild extends Build with Layers {
skip in Compile <<= lockFile.map(_ exists),
lock <<= lockFile map { f => IO.touch(f) },
unlock <<= lockFile map IO.delete
)
) ++ CheatingCompilerSettings.settings
// --------------------------------------------------------------
// Libraries used by Scalac that change infrequently
@@ -0,0 +1,148 @@
import sbt._
import xsbti.{Logger => _,_}
import compiler._
import inc._
import Locate.DefinesClass
import java.io.File
import java.util.concurrent._
import Keys._
import Compiler.Compilers
object CheatingCompilerSettings {
val hackedmodules = TaskKey[Map[String,File]]("hacked-sbt-components")
def settings: Seq[Setting[_]] = Seq(
hackedmodules := Map.empty,
// Now look for org.scala-sbt compiler-interface-src!
hackedmodules <<= (hackedmodules, target, streams) map { (h, t, s) => Map(sbtCompilerInterface(t,s)) ++ h },
compilers <<= (hackedmodules, scalaInstance, appConfiguration, streams, classpathOptions, javaHome) map {
(hacks, si, app, s, co, jh) => CheatingCompilers.compilers(hacks, si, co, jh)(app, s.log)
}
)
def sbtCompilerInterface(cacheDir: File, s: TaskStreams): (String, File) =
"compiler-interface-src" -> pullFile("compiler-interface-src", "http://typesafe.artifactoryonline.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.12.0-M2/jars/compiler-interface-src.jar", cacheDir, s)
import dispatch.{url=>_,_}
def pullFile(name: String, url: String, cacheDir: File, s: TaskStreams): File = {
val cachedFile = cacheDir / (name + ".jar")
if (!cachedFile.exists) {
// Ensure the directory for the cache exists.
cachedFile.getParentFile.mkdirs()
val fous = new java.io.FileOutputStream(cachedFile)
try Http(dispatch.url(url) >>> fous) finally fous.close()
val sha = pullSha(url)
if(!isShaOk(cachedFile, sha)) sys.error("Downloaded sha does not match file: " + cachedFile.getAbsolutePath)
IO.write(file(cachedFile.getAbsolutePath + ".sha1"), sha)
}
cachedFile
}
def isShaOk(f: File, sha: String): Boolean =
ShaResolve.calculateSha(f) == sha
def isCached(f: File, url: String): Boolean =
if(f.exists) {
val savedsha = file(f.getAbsolutePath + ".sha1")
savedsha.exists && isShaOk(f, IO.read(savedsha))
} else false
def pullSha(url: String): String =
Http(dispatch.url(url + ".sha1") >- identity)
}
object CheatingCompilers {
def compilers(hacks: Map[String,File], instance: ScalaInstance, cpOptions: ClasspathOptions, javaHome: Option[File])(implicit app: AppConfiguration, log: Logger): Compilers = {
val javac = Compiler.directOrFork(instance, cpOptions, javaHome)
val scalac = scalaCompiler(hacks, instance, cpOptions)
new Compilers(scalac, javac)
}
def scalaCompiler(hacks: Map[String,File], instance: ScalaInstance, cpOptions: ClasspathOptions)(implicit app: AppConfiguration, log: Logger): AnalyzingCompiler = {
val launcher = app.provider.scalaProvider.launcher
val componentManager = new CheatingComponentManager(hacks, launcher.globalLock, app.provider.components, Option(launcher.ivyHome), log)
new AnalyzingCompiler(instance, componentManager, cpOptions, log)
}
}
class CheatingComponentManager(val hacks: Map[String,File], globalLock: xsbti.GlobalLock, provider: xsbti.ComponentProvider, ivyHome: Option[File], log: Logger)
extends ComponentManager(globalLock, provider, ivyHome, log) {
private[this] val ivyCache = new IvyCache(ivyHome)
/** Get all of the files for component 'id', throwing an exception if no files exist for the component. */
override def files(id: String)(ifMissing: IfMissing): Iterable[File] = {
def fromGlobal1 =
lockGlobalCache {
try { update(id); getOrElse1(createAndCache1) }
catch { case e: NotInCache => createAndCache1 }
}
def getOrElse1(orElse: => Iterable[File]): Iterable[File] = {
val existing = provider.component(hacked(id))
if(existing.isEmpty) orElse else existing
}
def notFound1 = invalid("Could not find required component '" + id + "'")
def createAndCache1 =
ifMissing match {
case IfMissing.Fail => notFound1
case d: IfMissing.Define =>
d()
if(d.cache) cache(id)
getOrElse1(notFound1)
}
val result = lockLocalCache { getOrElse1(fromGlobal1) }
println("cheating-component-manager.files("+id+")")
result foreach println
result
}
private def isHacked(id: String) = hacks.keySet contains id
private def hacked(id: String) = if(isHacked(id)) "hacked-"+id else id
/** This is used to lock the local cache in project/boot/. By checking the local cache first, we can avoid grabbing a global lock. */
private def lockLocalCache[T](action: => T): T = lock(provider.lockFile)( action )
/** This is used to ensure atomic access to components in the global Ivy cache.*/
private def lockGlobalCache[T](action: => T): T = lock(ivyCache.lockFile)( action )
private def lock[T](file: File)(action: => T): T = globalLock(file, new Callable[T] { def call = action })
private def invalid(msg: String) = throw new InvalidComponent(msg)
private def invalid(e: NotInCache) = throw new InvalidComponent(e.getMessage, e)
override def define(id: String, files: Iterable[File]) = lockLocalCache { provider.defineComponent(hacked(id), files.toSeq.toArray) }
/** Retrieve the file for component 'id' from the local repository. */
private def update(id: String): Unit =
if(isHacked(id)) {
// Grab jar magically
println("Grabbing hacked jar for ["+id+"] = " + hacks.get(id))
define(hacked(id), Seq(hacks(id)))
} else ivyCache.withCachedJar(sbtModuleID(id), Some(globalLock), log) {jar =>
define(id, Seq(jar))
}
//---------------------!!!!!!!!!!!!!!!!----------------------------------------
// YUK - Ugly hack to use newer compiler interface - YUK
//---------------------!!!!!!!!!!!!!!!!----------------------------------------
private def sbtModuleID(id: String) = if(isHacked(id)) {
println("Making hackd module id!")
val version = "0.12.0-M2" // HACKED 20120314203952
val timestamp = "20120315T001212" // Hacked "20120314203952" //
val stampedVersion = version + "_" + timestamp
val result = ModuleID("org.scala-sbt", id, stampedVersion)
println("Looking for hacked module id: " + result)
result
} else ModuleID("org.scala-tools.sbt", id, ComponentManager.stampedVersion)
//---------------------!!!!!!!!!!!!!!!!----------------------------------------
// ENDYUK - Ugly hack to use newer compiler interface - ENDYUK
//---------------------!!!!!!!!!!!!!!!!----------------------------------------
/** Install the files for component 'id' to the local repository. This is usually used after writing files to the directory returned by 'location'. */
override def cache(id: String): Unit = ivyCache.cacheJar(sbtModuleID(id), file(id)(IfMissing.Fail), Some(globalLock), log)
override def clearCache(id: String): Unit = lockGlobalCache { ivyCache.clearCachedJar(sbtModuleID(id), Some(globalLock), log) }
}

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