sbt.GlobalLogging.scala Maven / Gradle / Ivy
/* sbt -- Simple Build Tool
* Copyright 2010 Mark Harrah
*/
package sbt
import java.io.{File, PrintWriter}
/** Provides the current global logging configuration.
*
* `full` is the current global logger. It should not be set directly because it is generated as needed from `backing.newLogger`.
* `console` is where all logging from all ConsoleLoggers should go.
* `backed` is the Logger that other loggers should feed into.
* `backing` tracks the files that persist the global logging.
* `newLogger` creates a new global logging configuration from a sink and backing configuration.
*/
final case class GlobalLogging(full: Logger, console: ConsoleOut, backed: AbstractLogger, backing: GlobalLogBacking, newLogger: (PrintWriter, GlobalLogBacking) => GlobalLogging)
/** Tracks the files that persist the global logging.
* `file` is the current backing file. `last` is the previous backing file, if there is one.
* `newBackingFile` creates a new temporary location for the next backing file. */
final case class GlobalLogBacking(file: File, last: Option[File], newBackingFile: () => File)
{
/** Shifts the current backing file to `last` and sets the current backing to `newFile`. */
def shift(newFile: File) = GlobalLogBacking(newFile, Some(file), newBackingFile)
/** Shifts the current backing file to `last` and sets the current backing to a new temporary file generated by `newBackingFile`. */
def shiftNew() = shift(newBackingFile())
/** If there is a previous backing file in `last`, that becomes the current backing file and the previous backing is cleared.
* Otherwise, no changes are made. */
def unshift = GlobalLogBacking(last getOrElse file, None, newBackingFile)
}
object GlobalLogBacking {
def apply(newBackingFile: => File): GlobalLogBacking = GlobalLogBacking(newBackingFile, None, newBackingFile _)
}
object GlobalLogging
{
def initial(newLogger: (PrintWriter, GlobalLogBacking) => GlobalLogging, newBackingFile: => File, console: ConsoleOut): GlobalLogging =
{
val log = ConsoleLogger(console)
GlobalLogging(log, console, log, GlobalLogBacking(newBackingFile), newLogger)
}
}
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