sbt/0.13.12.markdown at c07355883f515f80a87cd4cb0b2f80c00442ed13

By default the Scala toolchain artifacts are now transitively resolved using the provided scalaVersion and scalaOrganization. Previously a user specified scalaOrganization would not have affected transitive dependencies on, eg. scala-reflect. An Ivy-level mechanism is used for this purpose, and as a consequence the overriding happens early in the resolution process which might improve resolution times, and as a side benefit fixes #2286. The old behavior can be restored by adding ivyScala := { ivyScala.value map {_.copy(overrideScalaVersion = sbtPlugin.value)} } to your build. #2286/#2634 by @milessabin
The Build trait is deprecated in favor of the .sbt format #2530 by @dwijnand

When RecompileOnMacroDef is enabled, sbt will now print out a info level log indicating that some sources are being recompiled because it's used from a source that contains a macro definition. #2637 by @eed3si9n
Add Windows script support and native file extensions on Unix platforms. #2603 by @ekrich
Improves loading time of large builds. #2630 by @eed3si9n

Fixes a 0.13.11 regression: dependency resolution hitting Maven Central even with repository overrides. #2519/#2569 by @eed3si9n
Fixes a 0.13.11 regression in incremental compiler: IndexOutOfBoundsException in ExtractAPI #2497/#2557 by @smarter
Fixes merged dependency descriptors dropping configuration specification. [#2002][2005]/[#1500][1500] by @eed3si9n
Fixes merged dependency descriptors creating non-existing artifacts. [#2431]/2431/[#2500]/2500 by @Duhemm
Fixes incremental compilation misses when macro expansion references another source. #2560/#2563 by @eed3si9n
Fixes incremental compilation of package objects transitively in name hashing. #2432/#2326 by @gkossakowski
Fixes incremental compilation relying on filename of package objects. #2438 by @Duhemm
Provides a workaround flag incOptions := incOptions.value.withIncludeSynthToNameHashing(true) for name hashing not including synthetic methods. This will not be enabled by default in sbt 0.13. It can also enabled by passing sbt.inc.include_synth=true to JVM. [#2537][2573] by @eed3si9n
Fixes tab completion for tasks defined in AutoPlugin's buildSettings #2460/#2469 by @Duhemm
Fixes configuration merging during cached resolution. #2435/#2513 by @Duhemm