Target JDK 1.8 and use sbt-github-actions for snapshot publish

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         scala: [2.12.18]
-        java: [temurin@11, temurin@17, temurin@21]
+        java: [temurin@8]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Ignore line ending differences in git
@@ -45,33 +45,79 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Setup Java (temurin@11)
-        if: matrix.java == 'temurin@11'
+      - name: Setup Java (temurin@8)
+        if: matrix.java == 'temurin@8'
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 11
+          java-version: 8
           cache: sbt
 
-      - name: Setup Java (temurin@17)
-        if: matrix.java == 'temurin@17'
-        uses: actions/setup-java@v4
+      - name: Check that workflows are up to date
+        shell: bash
+        run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
+
+      - shell: bash
+        run: sbt '++ ${{ matrix.scala }}' test scripted
+
+      - name: Compress target directories
+        shell: bash
+        run: tar cf targets.tar target theme/target plugin/target project/target
+
+      - name: Upload target directories
+        uses: actions/upload-artifact@v4
         with:
-          distribution: temurin
-          java-version: 17
-          cache: sbt
+          name: target-${{ matrix.os }}-${{ matrix.scala }}-${{ matrix.java }}
+          path: targets.tar
+
+  publish:
+    name: Publish Artifacts
+    needs: [build]
+    if: github.event_name != 'pull_request' && (github.ref == 'refs/heads/main')
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        scala: [2.12.18]
+        java: [temurin@8]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Ignore line ending differences in git
+        if: contains(runner.os, 'windows')
+        run: git config --global core.autocrlf false
 
-      - name: Setup Java (temurin@21)
-        if: matrix.java == 'temurin@21'
+      - name: Configure pagefile for Windows
+        if: contains(runner.os, 'windows')
+        uses: al-cheb/[email protected]
+        with:
+          minimum-size: 2GB
+          maximum-size: 8GB
+          disk-root: 'C:'
+
+      - name: Checkout current branch (full)
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Java (temurin@8)
+        if: matrix.java == 'temurin@8'
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 21
+          java-version: 8
           cache: sbt
 
-      - name: Check that workflows are up to date
-        shell: bash
-        run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
+      - name: Download target directories (2.12.18)
+        uses: actions/download-artifact@v4
+        with:
+          name: target-${{ matrix.os }}-2.12.18-${{ matrix.java }}
 
-      - shell: bash
-        run: sbt '++ ${{ matrix.scala }}' test scripted
+      - name: Inflate target directories (2.12.18)
+        run: |
+          tar xf targets.tar
+          rm targets.tar
+
+      - name: Publish project
+        env:
+          NEXUS_USER: ${{ secrets.NEXUS_USER }}
+          NEXUS_PW: ${{ secrets.NEXUS_PW }}
+        run: sbt publish

build.sbt

@@ -17,7 +17,10 @@
 
 import net.bzzt.reproduciblebuilds.ReproducibleBuildsPlugin.reproducibleBuildsCheckResolver
 
-scalaVersion := "2.13.11"
+val scala212 = "2.12.18"
+
+ThisBuild / scalaVersion := scala212
+ThisBuild / crossScalaVersions := Seq(scala212)
 
 ThisBuild / apacheSonatypeProjectProfile := "pekko"
 ThisBuild / dynverSonatypeSnapshots := true
@@ -88,12 +91,18 @@ lazy val pekkoPlugin = project
 ThisBuild / githubWorkflowBuild := Seq(WorkflowStep.Sbt(List("test", "scripted")))
 
 ThisBuild / githubWorkflowTargetTags ++= Seq("v*")
-ThisBuild / githubWorkflowPublishTargetBranches := Seq()
-ThisBuild / githubWorkflowPublish := Seq()
+ThisBuild / githubWorkflowPublishTargetBranches := Seq(
+  RefPredicate.Equals(Ref.Branch("main")))
+
+ThisBuild / githubWorkflowPublish := Seq(
+  WorkflowStep.Sbt(
+    commands = List("publish"),
+    name = Some("Publish project"),
+    env = Map(
+      "NEXUS_USER" -> "${{ secrets.NEXUS_USER }}",
+      "NEXUS_PW" -> "${{ secrets.NEXUS_PW }}")))
 
 ThisBuild / githubWorkflowOSes := Seq("ubuntu-latest", "macos-latest", "windows-latest")
 
 ThisBuild / githubWorkflowJavaVersions := Seq(
-  JavaSpec.temurin("11"),
-  JavaSpec.temurin("17"),
-  JavaSpec.temurin("21"))
+  JavaSpec.temurin("8"))

project/plugins.sbt

@@ -17,7 +17,8 @@
 
 // When updating the sbt-paradox version,
 // remember to also update build.sbt
-addSbtPlugin("com.lightbend.paradox" % "sbt-paradox-theme" % "0.10.6")
+addSbtPlugin("com.lightbend.paradox" % "sbt-paradox-theme" % "0.9.2")
+addSbtPlugin("com.lightbend.paradox" % "sbt-paradox" % "0.9.2")
 addSbtPlugin("com.dwijnand" % "sbt-dynver" % "4.1.1")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.mdedetrich" % "sbt-apache-sonatype" % "0.1.10")