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sbt-one-log make Log dependency easy
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src Add support for InlineConfigurationWithExcludes introduced in sbt 0.13.8 Apr 20, 2015
version.sbt start to 1.0.2-SNAPSHOT Mar 7, 2015

sbt-one-log plugin Build Status

sbt-one-log is a sbt plugin make log dependency easy.

sbt-one-log plugin provides you a easy way to manage the log dependency ( avoid the log lib hell), and keep the dependency available when generate pom.xml.


  • automatic uniform your log dependency, current support slf4j and logback, other log lib will be bridged to slf4j.
  • scala-logging support, if you don't need it, you can turn off the scala-logging support
  • task generateLogbackXML to help you generate the logback.xml and logback-test.xml

release notes

sbt-one-log release notes


for sbt 0.13.5 or above, if you use sbt under 0.13.5, please use : 0.1.3

Add sbt-one-log plugin to the sbt configuration:

add plugin in project/plugins.sbt

addSbtPlugin("com.zavakid.sbt" % "sbt-one-log" % "1.0.1")

using build.sbt

// oneLogSettings will add libDependencies and resolvers
lazy val yourProject = (project in file(".")).enablePlugins(SbtOneLog)

Now sbt-one-log will automatic add the log dependency and override other log lib.

using project/Build.scala

important: oneLogSettings must position after libraryDependencies

import sbt._
import sbt.Keys._
import import com.zavakid.sbt._

object Build extends sbt.Build {

  // add oneLogSettings to your settings
  lazy val root = Project(
    id = "example",
    base = file(.),

  //other settings

and everything is OK.

why sbt-one-log

Scala can leverage lots of perfect Java lib, but it's chaotic with the Log libs in Java world. looking at the Log lib below:

  • java.util.logging
  • commons-logging
  • commons-logging-api
  • log4j
  • slf4j
  • logback
  • log4j 2
  • scala-logging
  • slf4s (latest version only support Scala 2.9.1)
  • Grizzled SLF4J
  • AVSL
  • loglady
  • logula (abandoned)

of course, you can keep your project dependency cleanly with one or two log lib (e.g. slf4j and logback)

but sometimes your other dependency is out of control. e.g. if you dependency with Apache httpclient lib which dependeny with commons-logging, you will log with commons-logging

also, you can add jcl-over-slf4j and exclud commons-logging explicitly in libraryDependencies setting. A better way is to explicitly declare dependency commons-logging with the sepcial version 99-empty.

so, sbt-one-log comes to free your hands.

for developers


after (fix bugs)/(add features), please add test case and run test. to run test, just

sbt publishLocal
sbt scripted


when release a new version, make sure to publish to by herald please.


sbt-one-log is under the Apache 2.0 License.

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