Skip to content


Repository files navigation

Macro Paradise Plugin

This plugin is no longer actively developed, but we do continue to release a new version whenever a new Scala 2.12.x version comes out.

In Scala 2.13, the plugin's functionality has been included in the compiler directly under the -Ymacro-annotations flag. (Regardless, its status remains the same: experimental, API subject to change.)

Join the chat at

Cutting a release

Do it on your own machine. The GPG key is used for scala modules, talk to @lrytz if you need the passphrase.

Update the scalaVersion in the build, and the version if needed, point your JAVA_HOME to Java 8, then

$> java -version
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_222-b10)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.222-b10, mixed mode)

$> export SONA_USER=⛄️ SONA_PASS=🌨

$> sbt \
  'set pgpSigningKey := Some(new java.math.BigInteger("C478A820AD150412FF2860C563426A08B91ED6B0", 16).longValue)' \
  'set pgpPassphrase := Some(Array.empty)' \
  clean \

$> git tag -s -m "2.1.1 for Scala 2.12.XY" v2.1.1_2.12.XY HEAD

$> git push upstream v2.1.1_2.12.XY

Then you'll need to close and release the staging repo, via, or with a command-line tool if you prefer.