sbt

Hi everyone. On behalf of the sbt project, I am happy to announce sbt 1.6.0-M1. This is the first milestone (M1) of the 1.6.x feature release, a binary compatible release focusing on new features. sbt 1.x is released under Semantic Versioning, and the plugins are expected to work throughout the 1.x series. Please try it out, and report any issues you might come across.

The headline features of sbt 1.6.0 are:

• Improved JDK 17 support
• BSP improvements
• Remote caching improvements
• Zinc improvements

How to upgrade

Jar Jar Abrams 1.8.0 and sbt-assembly 1.1.0 are released.

Jar Jar Abrams is an experimental extension to Jar Jar Links, intended to shade Scala libraries. Thus far we have been using Pants team's fork of Jar Jar Links, but now that it's been abandaned, Eric Peters has in-sourced it to jarjar-abrams repo so we can patch it.

Our jarjar fork is released under com.eed3si9n.jarjar organization name and package name.

bug fixes

• Eric has fixed a bug around ShadeRules.keep.

enhancement

• ASM was updated to 9.2.

I'm hacking on a small project called sudori, an experimental sbt. The initial goal is to port the macro to Scala 3. It's an exercise to take the macro apart and see if we can build it from the ground up. This an advanced area of Scala 2 and 3, and I'm finding my way around by trial and error. This is part 2.

• contImpl macro implements both Applicative-do and Monadic-do. It does so by first scanning the abstract syntax tree for key.value. When there are none, it calls pure(...) and map(...) when there is exactly one.
• To pass the Instance instance i to macro and back to the generated code, it uses Singleton type i.type, which internally holds on to the symbol of i.
• Quotes API provides a convenient way to generating lambda expression, but it must know the exact type of the parameters. This means we can't gradually expand the definition of the lambda expression as we walk the tree. To workaround this, we will use var one scope outside of the lambda expression.
• We defined Zero typeclass and summon a value for it to initialize the vars.

I'm hacking on a small project called sudori, an experimental sbt. The initial goal is to port the macro to Scala 3. It's an exercise to take the macro apart and see if we can build it from the ground up. This an advanced area of Scala 2 and 3, and I'm finding my way around by trial and error.

Reference:
- Scala 3 Reference: Metaprogramming

• Various Zinc fixes and enhancements by @ephemerist and @retronym
• Adds buildTarget/resources support for BSP #6552 by @samuelClarencTeads
• Adds build.sbt support for BSP import #6553 by @retronym
• Fixes BSP task error handling #6565 by @adpi2
• Fixes remote caching not managing resource files #6554 by @Nirvikalpa108
• Fixes launcher causing NoClassDefFoundError when launching sbt 1.4.0 - 1.4.2 launcher#98 by @eed3si9n
• Fixes cross-Scala suffix conflict warning involving _3 lm#383 by @eed3si9n

I'm happy to announce sbt 1.5.4 patch release is available. Full release note is here - https://github.com/sbt/sbt/releases/tag/v1.5.4

• Fixes compiler ClassLoader list to use compilerJars.toList (For Scala 3, this drops support for 3.0.0-M2) #6538 by @adpi2
• Fixes undercompilation of package object causing "Symbol 'type X' is missing from the classpath" zinc#983 by @retronym
• Fixes overcompilation with scalac -release flag zinc#982 by @retronym
• Fixes BSP on ARM Macs by keeping JNI server socket to keep using JNI ipcsocket#14 by @quelgar

In June of 2011, I started working on sbt-assembly for sbt 0.10, based on Coda Hale's assembly-sbt from sbt 0.7, which in turn was probably inspired by maven-assembly-plugin. After ten years, I'm going to call this one 1.0.0. sbt-assembly 1.0.0 is published to Maven Central.

• Fixes scalacOptions not getting forwarded to ScalaDoc in Scala 3 #6499 by @pikinier20
• Fixes undercompilation of sealed traits that extends other seal traits zinc#979 by @dwijnand
• Fixes version parsing not recognizing dots in a prerelease tag lm#377 by @Nirvikalpa108
• Fixes inputFile resolving to incorrect files when file specific globs are used io#319 by @eatkins
• Updates to Scala 2.12.14 #6522 by @mkurz

For more details please see https://github.com/sbt/sbt/releases/tag/v1.5.3

There's a long-standing bug that sbt maintainers have known for a while, which is that when sbt plugin is published to a Maven repository, the POM file sbt generates is not valid.

Here's an example. sbt-pgp 2.1.2 is published to https://repo1.maven.org/maven2/com/github/sbt/sbt-pgp_2.12_1.0/2.1.2/sbt-pgp-2.1.2.pom, but if you look at the POM file name it's sbt-pgp-2.1.2.pom, not matching the URL structure sbt-pgp_2.12_1.0. Since most plugins were published to Bintray until recently, and because only a few plugins were published to Sonatype OSSRH, which seems to be okay with this, this issue has not gotten too much attention.

Fast forward 2021, Bintray was discontinued, and now that more plugins are published to Sonatype OSSRH, companies that use Artifactory to front Maven Central are running into this. Active GitHub issue is sbt/sbt#3410. I will discuss an experimental workaround for this.

I'm happy to announce sbt 1.5.2 patch release is available. Full release note is here - https://github.com/sbt/sbt/releases/tag/v1.5.2

• Fixes sbt new leaving behind target directory #6488 by @eed3si9n
• Fixes ConcurrentModificationException while compiling Scala 2.13.4 and Java sources zinc#974 by @lefou
• Improved developer guide for new contributors #6469 by @Nirvikalpa108
• Fixes -client by making it the same as --client #6500 by @Nirvikalpa108
• Uses -Duser.home instead of $HOME to download launcher JAR #6483 by @rdesgroppes