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/* NSC -- new Scala compiler
* Copyright 2005-2013 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools
package cmd
import nsc.io._
import java.util.Properties
import java.io.FileInputStream
import scala.sys.SystemProperties
/** Contains logic for translating a property key/value pair into
* equivalent command line arguments. The default settings will
* translate, given programInfo.runner == "foo" :
*
* foo.bar=true to --bar // if --bar is unary
* foo.bar=quux to --bar quux // if --bar is binary
*/
class PropertyMapper(reference: Reference) extends (((String, String)) => List[String]) {
import reference._
lazy val RunnerName = programInfo.runner
// e.g. "partest.shootout" -> "--shootout"
def propNameToOptionName(key: String): Option[String] = (key split '.').toList match {
case List(RunnerName, name) => Some(name)
case _ => None
}
def isPassThrough(key: String): Boolean = false // e.g. "partest.options"
def onError(key: String, value: String): Unit = () // called when translate fails
def translate(key: String, value: String): List[String] = {
val opt = toOpt(key)
if (isUnaryOption(key) && isTrue(value)) List(opt)
else if (isBinaryOption(key)) List(opt, value)
else returning(Nil)(_ => onError(key, value))
}
def isTrue(value: String) = List("yes", "on", "true") contains value.toLowerCase
def apply(kv: (String, String)): List[String] = {
val (k, v) = kv
if (isPassThrough(k)) toArgs(v)
else propNameToOptionName(k) match {
case Some(optName) => translate(optName, v)
case _ => Nil
}
}
}
trait Property extends Reference {
def propMapper: PropertyMapper
override def propertyArgs: List[String] = systemPropertiesToOptions
def loadProperties(file: File): Properties =
returning(new Properties)(_ load new FileInputStream(file.path))
def systemPropertiesToOptions: List[String] =
propertiesToOptions(new SystemProperties().toList)
def propertiesToOptions(file: File): List[String] =
propertiesToOptions(loadProperties(file))
def propertiesToOptions(props: java.util.Properties): List[String] = {
import scala.collection.JavaConverters._
propertiesToOptions(props.asScala.toList)
}
def propertiesToOptions(props: List[(String, String)]) = props flatMap propMapper
}
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