package sbt
import java.io.PrintWriter
import java.io.File
import LogManager._
import std.Transform
import Project.ScopedKey
import Scope.GlobalScope
import MainLogging._
import Keys.{logLevel, logManager, persistLogLevel, persistTraceLevel, state, traceLevel}
import scala.Console.{BLUE,RESET}
object LogManager
{
def construct(data: Settings[Scope], state: State) = (task: ScopedKey[_], to: PrintWriter) =>
{
val manager = logManager in task.scope get data getOrElse default
manager(data, state, task, to)
}
lazy val default: LogManager = withLoggers()
def defaults(extra: ScopedKey[_] => Seq[AbstractLogger]): LogManager =
withLoggers((task,state) => defaultScreen(suppressedMessage(task, state)), extra = extra)
def withScreenLogger(mk: (ScopedKey[_], State) => AbstractLogger): LogManager = withLoggers(screen = mk)
def withLoggers(screen: (ScopedKey[_], State) => AbstractLogger = (sk, s) => defaultScreen(), backed: PrintWriter => AbstractLogger = defaultBacked(), extra: ScopedKey[_] => Seq[AbstractLogger] = _ => Nil): LogManager =
new LogManager {
def apply(data: Settings[Scope], state: State, task: ScopedKey[_], to: PrintWriter): Logger =
defaultLogger(data, state, task, screen(task, state), backed(to), extra(task).toList)
}
def defaultLogger(data: Settings[Scope], state: State, task: ScopedKey[_], console: AbstractLogger, backed: AbstractLogger, extra: List[AbstractLogger]): Logger =
{
val scope = task.scope
def getOr[T](key: AttributeKey[T], default: T): T = data.get(scope, key) getOrElse default
val screenLevel = getOr(logLevel.key, Level.Info)
val backingLevel = getOr(persistLogLevel.key, Level.Debug)
val screenTrace = getOr(traceLevel.key, defaultTraceLevel(state))
val backingTrace = getOr(persistTraceLevel.key, Int.MaxValue)
val extraBacked = state.globalLogging.backed :: Nil
multiLogger( new MultiLoggerConfig(console, backed, extraBacked ::: extra, screenLevel, backingLevel, screenTrace, backingTrace) )
}
def defaultTraceLevel(state: State): Int =
if(state.interactive) -1 else Int.MaxValue
def suppressedMessage(key: ScopedKey[_], state: State): SuppressedTraceContext => Option[String] =
{
lazy val display = Project.showContextKey(state)
def commandBase = "last " + display(unwrapStreamsKey(key))
def command(useColor: Boolean) = if(useColor) BLUE + commandBase + RESET else "'" + commandBase + "'"
context => Some( "Stack trace suppressed: run %s for the full output.".format(command(context.useColor)))
}
def unwrapStreamsKey(key: ScopedKey[_]): ScopedKey[_] = key.scope.task match {
case Select(task) => ScopedKey(key.scope.copy(task = Global), task)
case _ => key
}
}
trait LogManager
{
def apply(data: Settings[Scope], state: State, task: ScopedKey[_], writer: PrintWriter): Logger
}