Setup sbt-github-actions.

.github/workflows/clean.yml

@@ -0,0 +1,60 @@
+# This file was automatically generated by sbt-github-actions using the
+# githubWorkflowGenerate task. You should add and commit this file to
+# your git repository. It goes without saying that you shouldn't edit
+# this file by hand! Instead, if you wish to make changes, you should
+# change your sbt build configuration to revise the workflow description
+# to meet your needs, then regenerate this file.
+
+name: Clean
+
+on: push
+
+jobs:
+  delete-artifacts:
+    name: Delete Artifacts
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - name: Delete artifacts
+        shell: bash {0}
+        run: |
+          # Customize those three lines with your repository and credentials:
+          REPO=${GITHUB_API_URL}/repos/${{ github.repository }}
+
+          # A shortcut to call GitHub API.
+          ghapi() { curl --silent --location --user _:$GITHUB_TOKEN "$@"; }
+
+          # A temporary file which receives HTTP response headers.
+          TMPFILE=$(mktemp)
+
+          # An associative array, key: artifact name, value: number of artifacts of that name.
+          declare -A ARTCOUNT
+
+          # Process all artifacts on this repository, loop on returned "pages".
+          URL=$REPO/actions/artifacts
+          while [[ -n "$URL" ]]; do
+
+            # Get current page, get response headers in a temporary file.
+            JSON=$(ghapi --dump-header $TMPFILE "$URL")
+
+            # Get URL of next page. Will be empty if we are at the last page.
+            URL=$(grep '^Link:' "$TMPFILE" | tr ',' '\n' | grep 'rel="next"' | head -1 | sed -e 's/.*<//' -e 's/>.*//')
+            rm -f $TMPFILE
+
+            # Number of artifacts on this page:
+            COUNT=$(( $(jq <<<$JSON -r '.artifacts | length') ))
+
+            # Loop on all artifacts on this page.
+            for ((i=0; $i < $COUNT; i++)); do
+
+              # Get name of artifact and count instances of this name.
+              name=$(jq <<<$JSON -r ".artifacts[$i].name?")
+              ARTCOUNT[$name]=$(( $(( ${ARTCOUNT[$name]} )) + 1))
+
+              id=$(jq <<<$JSON -r ".artifacts[$i].id?")
+              size=$(( $(jq <<<$JSON -r ".artifacts[$i].size_in_bytes?") ))
+              printf "Deleting '%s' #%d, %'d bytes\n" $name ${ARTCOUNT[$name]} $size
+              ghapi -X DELETE $REPO/actions/artifacts/$id
+            done
+          done

.github/workflows/scala-2-ci.yml

@@ -0,0 +1,79 @@
+# This file was automatically generated by sbt-github-actions using the
+# githubWorkflowGenerate task. You should add and commit this file to
+# your git repository. It goes without saying that you shouldn't edit
+# this file by hand! Instead, if you wish to make changes, you should
+# change your sbt build configuration to revise the workflow description
+# to meet your needs, then regenerate this file.
+
+name: Scala 2 Continuous Integration
+
+on:
+  pull_request:
+    branches: [master]
+  push:
+    branches: [master]
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  build:
+    name: Build and Test
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        scala: [2.13.13]
+        java: [temurin@8, temurin@11, temurin@17, temurin@21]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - 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: 8
+          cache: sbt
+
+      - name: Setup Java (temurin@11)
+        if: matrix.java == 'temurin@11'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 11
+          cache: sbt
+
+      - name: Setup Java (temurin@17)
+        if: matrix.java == 'temurin@17'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+          cache: sbt
+
+      - name: Setup Java (temurin@21)
+        if: matrix.java == 'temurin@21'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+          cache: sbt
+
+      - name: Check that workflows are up to date
+        run: cd scala-2 && sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
+
+      - name: Build project
+        run: cd scala-2 && sbt '++ ${{ matrix.scala }}' test
+
+      - name: Check binary compatibility
+        if: matrix.java == 'temurin@8'
+        run: cd scala-2 && sbt '++ ${{ matrix.scala }}' mimaReportBinaryIssues
+
+      - name: Build docs
+        if: matrix.java == 'temurin@8'
+        run: cd scala-2 && sbt '++ ${{ matrix.scala }}' docs/mdoc

.github/workflows/scala-3-ci.yml

@@ -0,0 +1,79 @@
+# This file was automatically generated by sbt-github-actions using the
+# githubWorkflowGenerate task. You should add and commit this file to
+# your git repository. It goes without saying that you shouldn't edit
+# this file by hand! Instead, if you wish to make changes, you should
+# change your sbt build configuration to revise the workflow description
+# to meet your needs, then regenerate this file.
+
+name: Scala 3 Continuous Integration
+
+on:
+  pull_request:
+    branches: [master]
+  push:
+    branches: [master]
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  build:
+    name: Build and Test
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        scala: [3.3.3]
+        java: [temurin@8, temurin@11, temurin@17, temurin@21]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - 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: 8
+          cache: sbt
+
+      - name: Setup Java (temurin@11)
+        if: matrix.java == 'temurin@11'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 11
+          cache: sbt
+
+      - name: Setup Java (temurin@17)
+        if: matrix.java == 'temurin@17'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+          cache: sbt
+
+      - name: Setup Java (temurin@21)
+        if: matrix.java == 'temurin@21'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+          cache: sbt
+
+      - name: Check that workflows are up to date
+        run: cd scala-3 && sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
+
+      - name: Build project
+        run: cd scala-3 && sbt '++ ${{ matrix.scala }}' test
+
+      - name: Check binary compatibility
+        if: matrix.java == 'temurin@8'
+        run: cd scala-3 && sbt '++ ${{ matrix.scala }}' mimaReportBinaryIssues
+
+      - name: Build docs
+        if: matrix.java == 'temurin@8'
+        run: cd scala-3 && sbt '++ ${{ matrix.scala }}' docs/mdoc

CommonBuild.scala

@@ -1,11 +1,16 @@
 import com.typesafe.tools.mima.plugin.MimaKeys.mimaPreviousArtifacts
 import sbt.*
 import sbt.Keys.*
+import sbtghactions.{JavaSpec, WorkflowStep}
+import sbtghactions.GenerativeKeys.*
 import sbtgitpublish.GitPublishKeys.*
 
 package object andxor {
   val currentVersion = "0.14.0"
 
+  val scala2 = "2.13.13"
+  val scala3 = "3.3.3"
+
   val catsVersion = "2.10.0"
   val catsCore = "org.typelevel" %% "cats-core" % catsVersion
   val catsLaws = "org.typelevel" %% "cats-laws" % catsVersion % "test"
@@ -21,7 +26,11 @@ package object andxor {
 
   val scalariform = ("org.scalariform" %% "scalariform" % "0.2.10").cross(CrossVersion.for3Use2_13)
 
+  val javaVersions = Seq(8, 11, 17, 21).map(v => JavaSpec.temurin(v.toString))
+  val isJava8 = s"matrix.java == '${javaVersions.find(_.version == "8").get.render}'"
+
   trait CommonBuild {
+    val relDir: String
     val baseSettings0: Seq[Setting[_]]
 
     final lazy val baseSettings = Seq(
@@ -51,6 +60,20 @@ package object andxor {
       mimaPreviousArtifacts := Set("andxor" %% name.value % "0.14.0"),
     )
 
+    final lazy val githubActionsSettings = Seq(
+      ThisBuild / githubWorkflowScalaVersions := Some(crossScalaVersions.value).filter(_.nonEmpty).getOrElse(Seq(scalaVersion.value)),
+      ThisBuild / githubWorkflowJavaVersions := javaVersions,
+      ThisBuild / githubWorkflowArtifactUpload := false,
+      ThisBuild / githubWorkflowBuildMatrixFailFast := Some(false),
+      ThisBuild / githubWorkflowTargetBranches := Seq("master"),
+      ThisBuild / githubWorkflowPublishTargetBranches := Seq(),
+      ThisBuild / githubWorkflowSbtCommand := s"cd $relDir && sbt",
+      ThisBuild / githubWorkflowBuild ++= Seq(
+        WorkflowStep.Sbt(List("mimaReportBinaryIssues"), name = Some("Check binary compatibility"), cond = Some(isJava8)),
+        WorkflowStep.Sbt(List("docs/mdoc"), name = Some("Build docs"), cond = Some(isJava8)),
+      ),
+    )
+
     final lazy val testSettings = Seq(libraryDependencies += scalacheck % "test")
 
     def generateBase = Project("generate", file("generate"))

both.sh

@@ -51,4 +51,21 @@ function mimaReport() {
   sbtSequential mimaReportBinaryIssues
 }
 
+
+
+function githubWorkflowGenerate() {
+  sbtParallel githubWorkflowGenerate
+
+  ghdir='.github/workflows'
+
+  mv "scala-2/$ghdir/clean.yml" "$ghdir/clean.yml"
+  rm "scala-3/$ghdir/clean.yml"
+
+  cat "scala-2/$ghdir/ci.yml" | sed -E 's/^(name:)\s*(Continuous Integration)$/\1 Scala 2 \2/' > "$ghdir/scala-2-ci.yml"
+  rm "scala-2/$ghdir/ci.yml"
+
+  cat "scala-3/$ghdir/ci.yml" | sed -E 's/^(name:)\s*(Continuous Integration)$/\1 Scala 3 \2/' > "$ghdir/scala-3-ci.yml"
+  rm "scala-3/$ghdir/ci.yml"
+}
+
 $operation

common-plugins.sbt

@@ -1,3 +1,4 @@
+addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.23.0")
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.3")
 addSbtPlugin("org.typelevel" % "sbt-tpolecat" % "0.5.0")
 addSbtPlugin("org.scalameta" % "sbt-mdoc" % "2.5.2")

scala-2/build.sbt

@@ -2,6 +2,8 @@ import andxor.Build._
 
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
+githubActionsSettings
+
 lazy val generate: Project = generateBase
 
 lazy val core: Project = coreBase
@@ -18,11 +20,8 @@ lazy val tests: Project = testsBase
   .dependsOn(core, scalacheck, argonaut, circe)
 
 lazy val root: Project = project.in(file("."))
-  .settings(commonSettings)
-  .settings(
-    crossScalaVersions := Seq(),
-    gitRelease := {}
-  )
+  .settings(baseSettings)
+  .settings(gitRelease := {})
   .aggregate(generate, core, argonaut, circe, scalacheck, tests)
 
 lazy val docs = project.in(file("andxor-docs"))

scala-2/project/Build.scala

@@ -8,7 +8,8 @@ import sbt.Keys._
 import sbtgitpublish.GitPublishKeys._
 
 object Build extends CommonBuild {
-  val scalaVersions = Seq("2.13.13")
+  val relDir = "scala-2"
+  val scalaVersions = Seq(scala2)
 
   def scalaVersionSpecificFolders(srcName: String, srcBaseDir: java.io.File, scalaVersion: String): Seq[java.io.File] =
     CrossVersion.partialVersion(scalaVersion) match {

scala-3/build.sbt

@@ -2,6 +2,8 @@ import andxor.Build._
 
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
+githubActionsSettings
+
 lazy val generate: Project = generateBase
   .settings(
     buildInfoKeys := Seq[BuildInfoKey]("rootDir" -> (ThisBuild / baseDirectory).value.toString),
@@ -17,11 +19,8 @@ lazy val tests: Project = testsBase
   .dependsOn(core, scalacheck)
 
 lazy val root: Project = project.in(file("."))
-  .settings(commonSettings)
-  .settings(
-    crossScalaVersions := Seq(),
-    gitRelease := {}
-  )
+  .settings(baseSettings)
+  .settings(gitRelease := {})
   .aggregate(core, scalacheck, tests)
 
 lazy val docs = project.in(file("andxor-docs"))