...
[info] Done packaging.
[info]  published lib_2.11 to http://repo/artifactory/sbt-release-local/something/lib_2.11/1.0.15/lib_2.11-1.0.15.pom
[info]  published lib_2.11 to http://repo/artifactory/sbt-release-local/something/lib_2.11/1.0.15/lib_2.11-1.0.15.jar
[info]  published lib_2.11 to http://repo/artifactory/sbt-release-local/something/lib_2.11/1.0.15/lib_2.11-1.0.15-sources.jar
[info]  published lib_2.11 to http://repo/artifactory/sbt-release-local/something/lib_2.11/1.0.15/lib_2.11-1.0.15-javadoc.jar
[success] Total time: 35 s, completed 28.07.2016 10:34:04
...

/somethin/lib_2.11/1.0.15/lib_2.11-2.0.15-javadocs.jar
/somethin/lib_2.11/1.0.15/lib_2.11-2.0.15-sources.jar
/somethin/lib_2.11/1.0.15/lib_2.11-2.0.15.jar
/somethin/lib_2.11/1.0.15/lib_2.11-2.0.15.pom
/somethin/lib_2.11/1.0.15/maven-metadata.xml

lazy val repoSnapshots = "snapshots" at "http://repo/artifactory/sbt-snapshot-local;build.timestamp=" + new java.util.Date().getTime
lazy val repoReleases   = "releases" at "http://repo/artifactory/sbt-release-local/"

publishTo := Some(if (isSnapshot.value) repoSnapshots else repoReleases)