/* __ ______________ *\
** / |/ / ____/ ____/ **
** / | | /___ / /___ **
** /_/|__/_____/_____/ Copyright 2005-2006 LAMP/EPFL **
**
** $Id$
\* */
package scala.tools.ant {
import java.io.File
import java.net.{URL, URLClassLoader}
import java.util.{ArrayList, Vector}
import org.apache.tools.ant.{AntClassLoader, BuildException,
DirectoryScanner, Project}
import org.apache.tools.ant.taskdefs.MatchingTask
import org.apache.tools.ant.types.Path
import org.apache.tools.ant.util.{FileUtils, GlobPatternMapper,
SourceFileScanner}
import org.apache.tools.ant.types.{EnumeratedAttribute, Reference}
import scala.tools.nsc.reporters.{Reporter, ConsoleReporter}
import scala.tools.nsc.{Global, FatalError, Settings}
/** An Ant task to compile with the new Scala compiler (NSC).
* This task can take the following parameters as attributes:<ul>
* <li>srcdir (mandatory),</li>
* <li>srcref,</li>
* <li>destdir,</li>
* <li>classpath,</li>
* <li>classpathref,</li>
* <li>sourcepath,</li>
* <li>sourcepathref,</li>
* <li>bootclasspath,</li>
* <li>bootclasspathref,</li>
* <li>extdirs,</li>
* <li>extdirsref,</li>
* <li>encoding,</li>
* <li>target,</li>
* <li>force,</li>
* <li>logging,</li>
* <li>logphase,</li>
* <li>usepredefs,</li>
* <li>debugcode,</li>
* <li>addparams.</li>
* </ul>
* It also takes the following parameters as nested elements:<ul>
* <li>src (for srcdir),</li>
* <li>classpath,</li>
* <li>sourcepath,</li>
* <li>bootclasspath,</li>
* <li>extdirs.</li>
* </ul>
*
* @author Gilles Dubochet */
class Scalac extends MatchingTask {
private val SCALA_PRODUCT: String =
System.getProperty("scala.product", "scalac")
private val SCALA_VERSION: String =
System.getProperty("scala.version", "Unknown version")
/** The unique Ant file utilities instance to use in this task. */
private val fileUtils = FileUtils.newFileUtils()
/******************************************************************************\
** Ant user-properties **
\******************************************************************************/
abstract class PermissibleValue {
val values: List[String]
def isPermissible(value: String): Boolean =
(value == "") || values.exists(.startsWith(value))
}
/** Defines valid values for the logging property. */
object LoggingLevel extends PermissibleValue {
val values = List("none", "verbose", "debug")
}
/** Defines valid values for properties that refer to compiler phases. */
object CompilerPhase extends PermissibleValue {
val values = List("namer", "typer", "pickler", "uncurry", "tailcalls",
"transmatch", "explicitouter", "erasure", "lambdalift",
"flatten", "constructors", "mixin", "icode", "jvm",
"terminal")
}
object Target extends PermissibleValue {
val values = List("jvm", "msil", "cldc")
}
/** The directories that contain source files to compile. */
private var origin: Option[Path] = None
/** The directory to put the compiled files in. */
private var destination: Option[File] = None
/** The class path to use for this compilation. */
private var classpath: Option[Path] = None
/** The source path to use for this compilation. */
private var sourcepath: Option[Path] = None
/** The boot class path to use for this compilation. */
private var bootclasspath: Option[Path] = None
/** The external extensions path to use for this compilation. */
private var extdirs: Option[Path] = None
/** The character encoding of the files to compile. */
private var encoding: Option[String] = None
// the targetted backend
private var backend: Option[String] = None
/** Whether to force compilation of all files or not. */
private var force: Boolean = false
/** How much logging output to print. Either none (default),
* verbose or debug. */
private var logging: Option[String] = None
/** Which compilation phases should be logged during compilation. */
private var logPhase: List[String] = Nil
/** Whether to use implicit predefined values or not. */
private var usepredefs: Boolean = true;
/** Instruct the compiler to generate debugging information */
private var debugCode: Boolean = false
/** Instruct the compiler to generate debugging information */
private var addParams: String = ""
/** Whether the compiler is being debuged. Prints more information in case
* in case of failure. */
private var scalacDebugging: Boolean = false
/******************************************************************************\
** Properties setters **
\******************************************************************************/
/** Sets the srcdir attribute. Used by Ant.
* @param input The value of <code>origin</code>. */
def setSrcdir(input: Path) =
if (origin.isEmpty) origin = Some(input)
else origin.get.append(input)
/** Sets the <code>origin</code> as a nested src Ant parameter.
* @return An origin path to be configured. */
def createSrc(): Path = {
if (origin.isEmpty) origin = Some(new Path(getProject()))
origin.get.createPath()
}
/** Sets the <code>origin</code> as an external reference Ant parameter.
* @param input A reference to an origin path. */
def setSrcref(input: Reference) =
createSrc().setRefid(input)
/** Sets the destdir attribute. Used by Ant.
* @param input The value of <code>destination</code>. */
def setDestdir(input: File) =
destination = Some(input)
/** Sets the classpath attribute. Used by Ant.
* @param input The value of <code>classpath</code>. */
def setClasspath(input: Path) =
if (classpath.isEmpty) classpath = Some(input)
else classpath.get.append(input)
/** Sets the <code>classpath</code> as a nested classpath Ant parameter.
* @return A class path to be configured. */
def createClasspath(): Path = {
if (classpath.isEmpty) classpath = Some(new Path(getProject()))
classpath.get.createPath()
}
/** Sets the <code>classpath</code> as an external reference Ant parameter.
* @param input A reference to a class path. */
def setClasspathref(input: Reference) =
createClasspath().setRefid(input)
/** Sets the sourcepath attribute. Used by Ant.
* @param input The value of <code>sourcepath</code>. */
def setSourcepath(input: Path) =
if (sourcepath.isEmpty) sourcepath = Some(input)
else sourcepath.get.append(input)
/** Sets the <code>sourcepath</code> as a nested sourcepath Ant parameter.
* @return A source path to be configured. */
def createSourcepath(): Path = {
if (sourcepath.isEmpty) sourcepath = Some(new Path(getProject()))
sourcepath.get.createPath()
}
/** Sets the <code>sourcepath</code> as an external reference Ant parameter.
* @param input A reference to a source path. */
def setSourcepathref(input: Reference) =
createSourcepath().setRefid(input)
/** Sets the boot classpath attribute. Used by Ant.
* @param input The value of <code>bootclasspath</code>. */
def setBootclasspath(input: Path) =
if (bootclasspath.isEmpty) bootclasspath = Some(input)
else bootclasspath.get.append(input)
/** Sets the <code>bootclasspath</code> as a nested sourcepath Ant
* parameter.
* @return A source path to be configured. */
def createBootclasspath(): Path = {
if (bootclasspath.isEmpty) bootclasspath = Some(new Path(getProject()))
bootclasspath.get.createPath()
}
/** Sets the <code>bootclasspath</code> as an external reference Ant
* parameter.
* @param input A reference to a source path. */
def setBootclasspathref(input: Reference) =
createBootclasspath().setRefid(input)
/** Sets the external extensions path attribute. Used by Ant.
* @param input The value of <code>extdirs</code>. */
def setExtdirs(input: Path) =
if (extdirs.isEmpty) extdirs = Some(input)
else extdirs.get.append(input)
/** Sets the <code>extdirs</code> as a nested sourcepath Ant parameter.
* @return An extensions path to be configured. */
def createExtdirs(): Path = {
if (extdirs.isEmpty) extdirs = Some(new Path(getProject()))
extdirs.get.createPath()
}
/** Sets the <code>extdirs</code> as an external reference Ant parameter.
* @param input A reference to an extensions path. */
def setExtdirsref(input: Reference) =
createExtdirs().setRefid(input)
/** Sets the encoding attribute. Used by Ant.
* @param input The value of <code>encoding</code>. */
def setEncoding(input: String): Unit =
encoding = Some(input)
def setTarget(input: String): Unit =
if (Target.isPermissible(input)) backend = Some(input)
else error("Unknown target '" + input + "'")
/** Sets the force attribute. Used by Ant.
* @param input The value for <code>force</code>. */
def setForce(input: Boolean): Unit =
force = input
/** Sets the logging level attribute. Used by Ant.
* @param input The value for <code>logging</code>. */
def setLogging(input: String) =
if (LoggingLevel.isPermissible(input)) logging = Some(input)
else error("Logging level '" + input + "' does not exist.")
/** Sets the log attribute. Used by Ant.
* @param input The value for <code>logPhase</code>. */
def setLogPhase(input: String) = {
logPhase = List.fromArray(input.split(",")).flatMap(s: String => {
val st = s.trim()
if (CompilerPhase.isPermissible(st))
(if (input != "") List(st) else Nil)
else {
error("Phase " + st + " in log does not exist.")
Nil
}
})
}
/** Sets the use predefs attribute. Used by Ant.
* @param input The value for <code>usepredefs</code>. */
def setUsepredefs(input: Boolean): Unit =
usepredefs = input;
/** Set the debug info attribute. */
def setDebugCode(input: Boolean): Unit =
debugCode = input
/** Set the debug info attribute. */
def setAddparams(input: String): Unit =
addParams = input
/** Set the scalac debugging attribute. */
def setScalacdebugging(input: Boolean): Unit =
scalacDebugging = input
/******************************************************************************\
** Properties getters **
\******************************************************************************/
/** Gets the value of the classpath attribute in a Scala-friendly form.
* @returns The class path as a list of files. */
private def getClasspath: List[File] =
if (classpath.isEmpty) error("Member 'classpath' is empty.")
else
List.fromArray(classpath.get.list()).map(nameToFile)
/** Gets the value of the origin attribute in a Scala-friendly form.
* @returns The origin path as a list of files. */
private def getOrigin: List[File] =
if (origin.isEmpty) error("Member 'origin' is empty.")
else List.fromArray(origin.get.list()).map(nameToFile)
/** Gets the value of the destination attribute in a Scala-friendly form.
* @returns The destination as a file. */
private def getDestination: File =
if (destination.isEmpty) error("Member 'destination' is empty.")
else existing(getProject().resolveFile(destination.get.toString()))
/** Gets the value of the sourcepath attribute in a Scala-friendly form.
* @returns The source path as a list of files. */
private def getSourcepath: List[File] =
if (sourcepath.isEmpty) error("Member 'sourcepath' is empty.")
else List.fromArray(sourcepath.get.list()).map(nameToFile)
/** Gets the value of the bootclasspath attribute in a Scala-friendly form.
* @returns The boot class path as a list of files. */
private def getBootclasspath: List[File] =
if (bootclasspath.isEmpty) error("Member 'bootclasspath' is empty.")
else List.fromArray(bootclasspath.get.list()).map(nameToFile)
/** Gets the value of the extdirs attribute in a Scala-friendly form.
* @returns The extensions path as a list of files. */
private def getExtdirs: List[File] =
if (extdirs.isEmpty) error("Member 'extdirs' is empty.")
else List.fromArray(extdirs.get.list()).map(nameToFile)
/******************************************************************************\
** Compilation and support methods **
\******************************************************************************/
/** This is forwarding method to circumvent bug #281 in Scala 2. Remove when
* bug has been corrected. */
override protected def getDirectoryScanner(baseDir: java.io.File) =
super.getDirectoryScanner(baseDir)
/** Transforms a string name into a file relative to the provided base
* directory.
* @param base A file pointing to the location relative to which the name
* will be resolved.
* @param name A relative or absolute path to the file as a string.
* @return A file created from the name and the base file. */
private def nameToFile(base: File)(name: String): File =
existing(fileUtils.resolveFile(base, name))
/** Transforms a string name into a file relative to the build root
* directory.
* @param name A relative or absolute path to the file as a string.
* @return A file created from the name. */
private def nameToFile(name: String): File =
existing(getProject().resolveFile(name))
/** Tests if a file exists and prints a warning in case it doesn't. Always
* returns the file, even if it doesn't exist.
* @param file A file to test for existance.
* @return The same file. */
private def existing(file: File): File = {
if (!file.exists())
log("Element '" + file.toString() + "' does not exist.",
Project.MSG_WARN)
file
}
/** Transforms a path into a Scalac-readable string.
* @param path A path to convert.
* @return A string-representation of the path like 'a.jar:b.jar'. */
private def asString(path: List[File]): String =
path.map(asString).mkString("", File.pathSeparator, "")
/** Transforms a file into a Scalac-readable string.
* @param path A file to convert.
* @return A string-representation of the file like '/x/k/a.scala'. */
private def asString(file: File): String =
file.getAbsolutePath()
/** Generates a build error. Error location will be the current task in the
* ant file.
* @param message A message describing the error.
* @throws BuildException A build error exception thrown in every case. */
private def error(message: String): Nothing =
throw new BuildException(message, getLocation())
/******************************************************************************\
** The big execute method **
\******************************************************************************/
/** Performs the compilation. */
override def execute() = {
// Tests if all mandatory attributes are set and valid.
if (origin.isEmpty) error("Attribute 'srcdir' is not set.")
if (getOrigin.isEmpty) error("Attribute 'srcdir' is not set.")
if (!destination.isEmpty && !destination.get.isDirectory())
error("Attribute 'destdir' does not refer to an existing directory.")
if (destination.isEmpty) destination = Some(getOrigin.head)
val mapper = new GlobPatternMapper()
mapper.setTo("*.class")
mapper.setFrom("*.scala")
// Scans source directories to build up a compile lists.
// If force is false, only files were the .class file in destination is
// older than the .scala file will be used.
val sourceFiles: List[File] =
for {
val originDir <- getOrigin;
val originFile <- {
var includedFiles =
getDirectoryScanner(originDir).getIncludedFiles()
if (!force) {
includedFiles = new SourceFileScanner(this).
restrict(includedFiles, originDir, destination.get, mapper)
}
val list = List.fromArray(includedFiles)
if (scalacDebugging && list.length > 0)
log(
list.mkString(
"Compiling source file" +
(if (list.length > 1) "s: " else ": "),
", ",
" "
) + "to " + getDestination.toString()
)
else if (list.length > 0)
log(
"Compiling " + list.length + " source file" +
(if (list.length > 1) "s" else "") +
(" to " + getDestination.toString())
)
else
log("No files selected for compilation", Project.MSG_VERBOSE)
list
}
} yield {
log(originFile.toString(), Project.MSG_DEBUG)
nameToFile(originDir)(originFile)
}
// Builds-up the compilation settings for Scalac with the existing Ant
// parameters.
val reporter = new ConsoleReporter()
val settings = new Settings(error)
settings.outdir.value = asString(destination.get)
if (!classpath.isEmpty)
settings.classpath.value = asString(getClasspath)
if (!sourcepath.isEmpty)
settings.sourcepath.value = asString(getSourcepath)
else if (origin.get.size() > 0)
settings.sourcepath.value = origin.get.list()(0)
if (!bootclasspath.isEmpty)
settings.bootclasspath.value = asString(getBootclasspath)
if (!extdirs.isEmpty) settings.extdirs.value = asString(getExtdirs)
if (!encoding.isEmpty) settings.encoding.value = encoding.get
if (!backend.isEmpty) settings.target.value = backend.get
if (!logging.isEmpty && logging.get == "verbose")
settings.verbose.value = true
else if (!logging.isEmpty && logging.get == "debug") {
settings.verbose.value = true
settings.debug.value = true
}
if (!logPhase.isEmpty) settings.log.value = logPhase
settings.nopredefs.value = !usepredefs;
settings.debuginfo.value = debugCode
log("Scalac params = '" + addParams + "'", Project.MSG_DEBUG)
var args =
if (addParams.trim() == "") Nil
else List.fromArray(addParams.trim().split(" ")).map(.trim())
while(!args.isEmpty) {
val argsBuf = args
if (args.head.startsWith("-")) {
for (val setting <- settings.allSettings)
args = setting.tryToSet(args);
} else error("Parameter '" + args.head + "' does not start with '-'.")
if (argsBuf eq args)
error("Parameter '" + args.head + "' is not recognised by Scalac.")
}
// Compiles the actual code
val compiler = new Global(settings, reporter)
try {
(new compiler.Run).compile(sourceFiles.map(f:File=>f.toString()))
} catch {
case exception: Throwable if (exception.getMessage != null) =>
exception.printStackTrace()
error("Compile failed because of an internal compiler error (" +
exception.getMessage + "); see the error output for details.")
case exception =>
exception.printStackTrace()
error("Compile failed because of an internal compiler error " +
"(no error message provided); see the error output for details.")
}
reporter.printSummary()
if (reporter.errors > 0) {
error (
"Compile failed with " +
reporter.errors + " error" +
(if (reporter.errors > 1) "s" else "") +
"; see the compiler error output for details."
)
} else if (reporter.warnings > 0)
log (
"Compile suceeded with " +
reporter.warnings + " warning" +
(if (reporter.warnings > 1) "s" else "") +
"; see the compiler output for details."
)
}
}
}
