Log is a very small Scala library for logging that works both on the JVM and on JavaScript (Scala.js). It is (C)opyright 2020 by Hanns Holger Rutz. All rights reserved. This project is released under the GNU Lesser General Public License v2.1+ and comes with absolutely no warranties. To contact the author, send an e-mail to contact at sciss.de.

This project builds with sbt against Scala 2.13, 2.12, Dotty (JVM) and Scala 2.13 (JS).

To use the library in your project:

"de.sciss" %% "log" % v

Use %%% with Scala.js cross project. The current version v is "0.1.1".

Please see Demo.scala in the test sources, or run sbt rootJVM/test:run or sbt rootJS/test:run. Basically:

import de.sciss.log._

val log = new Logger("demo", Level.Info, Console.err)
log.debug("this is swallowed"   )
log.info ("this is information" )
log.warn ("this is a warning"   )
log.error("this is an error"    )

The print-out of this is

[2020-11-01 23:55:33.560] [info] 'demo' this is information
[2020-11-01 23:55:33.561] [warn] 'demo' this is a warning
[2020-11-01 23:55:33.561] [error] 'demo' this is an error

No more, no less. Look ma', no macros, no Java libraries. Time-stamps are at millisecond granularity, this just reflects my preference. You can turn time-stamps off by passing argument timeStamp = false to the constructor.