Review Scala 3 publishing settings for better compatibility

.github/workflows/ci.yml

@@ -9,12 +9,14 @@ jobs:
       fail-fast: false
       matrix:
         jdk: [adopt@1.8]
-        scala: ['2.12', '2.13', '3.1']
+        scala: ['2.12', '2.13', '3.0', '3.1']
         include:
           - scala: '2.12'
             scala-version: 2.12.15
           - scala: '2.13'
             scala-version: 2.13.6
+          - scala: '3.0'
+            scala-version: 3.0.2
           - scala: '3.1'
             scala-version: 3.1.0
 

build.sbt

@@ -110,7 +110,11 @@ lazy val commonSettings = Seq(
 
   publishMavenStyle := true,
   Test / publishArtifact := false,
-  publishTo := sonatypePublishToBundle.value
+  publishTo := sonatypePublishToBundle.value,
+
+  // Don't publish for Scala 3.1 or later, only for 3.0. This is following the recommendation in
+  // https://scala-lang.org/blog/2021/10/21/scala-3.1.0-released.html#compatibility-notice.
+  publish / skip := forScalaVersions { case (3, x) if x > 0 => true; case _ => false }.value
   // format: on
 )
 
@@ -119,7 +123,7 @@ lazy val commonSettings = Seq(
 def crossVersionSharedSources(unmanagedSrcs: SettingKey[Seq[File]]) = {
   unmanagedSrcs ++= {
     val versionNumber = CrossVersion.partialVersion(scalaVersion.value)
-    val expectedVersions = Seq(scala212, scala213, scala3).flatMap(CrossVersion.partialVersion)
+    val expectedVersions = Seq(scala212, scala213, scala30, scala31).flatMap(CrossVersion.partialVersion)
     expectedVersions.flatMap { case v @ (major, minor) =>
       List(
         if (versionNumber.exists(_ <= v)) unmanagedSrcs.value.map { dir => new File(dir.getPath + s"-$major.$minor-") }

core/build.sbt

@@ -2,6 +2,6 @@ import Dependencies.Version._
 
 name := "pureconfig-core"
 
-crossScalaVersions := Seq(scala212, scala213, scala3)
+crossScalaVersions := Seq(scala212, scala213, scala30, scala31)
 
 libraryDependencies += Dependencies.typesafeConfig

project/Dependencies.scala

@@ -5,7 +5,8 @@ object Dependencies {
   object Version {
     val scala212 = "2.12.15"
     val scala213 = "2.13.6"
-    val scala3 = "3.1.0"
+    val scala30 = "3.0.2"
+    val scala31 = "3.1.0"
 
     val typesafeConfig = "1.4.1"
 

testkit/build.sbt

@@ -2,7 +2,7 @@ import Dependencies.Version._
 
 name := "pureconfig-testkit"
 
-crossScalaVersions := Seq(scala212, scala213, scala3)
+crossScalaVersions := Seq(scala212, scala213, scala30, scala31)
 
 libraryDependencies ++= Seq(
   Dependencies.scalaTest,

tests/build.sbt

@@ -2,6 +2,6 @@ import Dependencies.Version._
 
 name := "pureconfig-tests"
 
-crossScalaVersions := Seq(scala212, scala213, scala3)
+crossScalaVersions := Seq(scala212, scala213, scala30, scala31)
 
 publish / skip := true