tulz-app · yurique · Feb 26, 2026 · Feb 26, 2026 · Feb 26, 2026 · Feb 26, 2026
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -27,47 +27,39 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.2.1, 2.13.10, 2.12.17]
-        java: [temurin@11]
+        scala: [3.3.7, 2.13.18, 2.12.21]
+        java: [zulu@8]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
-      - name: Setup Java (temurin@11)
-        if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v2
+      - name: Setup Java (zulu@8)
+        if: matrix.java == 'zulu@8'
+        uses: actions/setup-java@v5
         with:
-          distribution: temurin
-          java-version: 11
+          distribution: zulu
+          java-version: 8
+          cache: sbt
 
-      - name: Cache sbt
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/.sbt
-            ~/.ivy2/cache
-            ~/.coursier/cache/v1
-            ~/.cache/coursier/v1
-            ~/AppData/Local/Coursier/Cache/v1
-            ~/Library/Caches/Coursier/v1
-          key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
+      - name: Setup sbt
+        uses: sbt/setup-sbt@v1
 
       - name: Check that workflows are up to date
-        run: sbt ++${{ matrix.scala }} githubWorkflowCheck
+        run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
 
       - name: Build project
-        run: sbt ++${{ matrix.scala }} test
+        run: sbt '++ ${{ matrix.scala }}' test
 
-      - run: sbt ++${{ matrix.scala }} versionPolicyCheck test
+      - run: sbt '++ ${{ matrix.scala }}' versionPolicyCheck test
 
       - name: Compress target directories
-        run: tar cf targets.tar modules/apply/.js/target target modules/apply/.jvm/target modules/full/.js/target modules/full/.jvm/target modules/basic/.js/target modules/basic-light/.jvm/target modules/basic/.jvm/target modules/full-light/.js/target modules/basic-light/.js/target modules/full-light/.jvm/target project/target
+        run: tar cf targets.tar modules/apply/.js/target target modules/apply/.jvm/target modules/full/.js/target modules/full/.jvm/target modules/shared/.js/target modules/shared/.jvm/target modules/basic/.js/target modules/basic-light/.jvm/target modules/basic/.jvm/target modules/full-light/.js/target modules/basic-light/.js/target modules/full-light/.jvm/target project/target
 
       - name: Upload target directories
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v5
         with:
           name: target-${{ matrix.os }}-${{ matrix.scala }}-${{ matrix.java }}
           path: targets.tar
@@ -79,62 +71,54 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.10]
-        java: [temurin@11]
+        scala: [3.3.7]
+        java: [zulu@8]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
-      - name: Setup Java (temurin@11)
-        if: matrix.java == 'temurin@11'
-        uses: actions/setup-java@v2
+      - name: Setup Java (zulu@8)
+        if: matrix.java == 'zulu@8'
+        uses: actions/setup-java@v5
         with:
-          distribution: temurin
-          java-version: 11
+          distribution: zulu
+          java-version: 8
+          cache: sbt
 
-      - name: Cache sbt
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/.sbt
-            ~/.ivy2/cache
-            ~/.coursier/cache/v1
-            ~/.cache/coursier/v1
-            ~/AppData/Local/Coursier/Cache/v1
-            ~/Library/Caches/Coursier/v1
-          key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
-
-      - name: Download target directories (3.2.1)
-        uses: actions/download-artifact@v2
+      - name: Setup sbt
+        uses: sbt/setup-sbt@v1
+
+      - name: Download target directories (3.3.7)
+        uses: actions/download-artifact@v6
         with:
-          name: target-${{ matrix.os }}-3.2.1-${{ matrix.java }}
+          name: target-${{ matrix.os }}-3.3.7-${{ matrix.java }}
 
-      - name: Inflate target directories (3.2.1)
+      - name: Inflate target directories (3.3.7)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.13.10)
-        uses: actions/download-artifact@v2
+      - name: Download target directories (2.13.18)
+        uses: actions/download-artifact@v6
         with:
-          name: target-${{ matrix.os }}-2.13.10-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.13.18-${{ matrix.java }}
 
-      - name: Inflate target directories (2.13.10)
+      - name: Inflate target directories (2.13.18)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.12.17)
-        uses: actions/download-artifact@v2
+      - name: Download target directories (2.12.21)
+        uses: actions/download-artifact@v6
         with:
-          name: target-${{ matrix.os }}-2.12.17-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.12.21-${{ matrix.java }}
 
-      - name: Inflate target directories (2.12.17)
+      - name: Inflate target directories (2.12.21)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - run: sbt ++${{ matrix.scala }} ci-release
+      - run: sbt ci-release
diff --git a/.github/workflows/clean.yml b/.github/workflows/clean.yml
@@ -9,6 +9,9 @@ name: Clean
 
 on: push
 
+permissions:
+  actions: write
+
 jobs:
   delete-artifacts:
     name: Delete Artifacts
@@ -17,6 +20,7 @@ jobs:
       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/${{ github.repository }}
@@ -25,7 +29,7 @@ jobs:
           ghapi() { curl --silent --location --user _:$GITHUB_TOKEN "$@"; }
 
           # A temporary file which receives HTTP response headers.
-          TMPFILE=/tmp/tmp.$$
+          TMPFILE=$(mktemp)
 
           # An associative array, key: artifact name, value: number of artifacts of that name.
           declare -A ARTCOUNT

diff --git a/build.sbt b/build.sbt
@@ -1,5 +1,6 @@
 import sbt.librarymanagement.CrossVersion
-import com.typesafe.tools.mima.core._
+import com.typesafe.tools.mima.core.*
+import org.typelevel.scalacoptions.{ ScalacOption, ScalacOptions }
 
 inThisBuild(
   List(
@@ -9,7 +10,7 @@ inThisBuild(
     developers               := List(Developer("yurique", "Iurii Malchenko", "i@yurique.com", url("https://github.com/yurique"))),
     scmInfo                  := Some(ScmInfo(url("https://github.com/tulz-app/tuplez"), "scm:git@github.com/tulz-app/tuplez.git")),
     (Test / publishArtifact) := false,
-    scalaVersion             := ScalaVersions.v213,
+    scalaVersion             := ScalaVersions.v3,
     crossScalaVersions := Seq(
       ScalaVersions.v3,
       ScalaVersions.v213,
@@ -34,104 +35,131 @@ inThisBuild(
   )
 )
 
+// scala3-only implementation without codegen
+lazy val `tuplez-shared` =
+  crossProject(JVMPlatform, JSPlatform)
+    .crossType(CrossType.Pure)
+    .in(file("modules/shared"))
+    .settings(commonSettings)
+    .jsSettings(commonJsSettings)
+    .settings(
+      name := "tuplez-shared",
+      description := "Scala tuple composition, shared module with Scala 3 implementation."
+    )
+
 lazy val `tuplez-full` =
   crossProject(JVMPlatform, JSPlatform)
     .crossType(CrossType.Pure)
     .in(file("modules/full"))
     .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
-    .settings(ScalaOptions.fixOptions)
     .settings(commonSettings)
     .jsSettings(commonJsSettings)
     .settings(
       name := "tuplez-full",
       Compile / sourceGenerators += Def.task {
-        Seq.concat(
-          new TupleCompositionGenerator((Compile / sharedScalaSource).value, to = 22, generateConcats = true, generatePrepends = true).generate()
-        )
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((2, _)) =>
+            new TupleCompositionGenerator((Compile / sharedScala2Source).value, to = 22, splitPriorityAt = 6, generateConcats = true, generatePrepends = true).generate()
+          case Some((3, _)) =>
+            Seq.empty
+          case _ => Seq.empty
+        }
       }.taskValue,
       Test / sourceGenerators += Def.task {
         Seq.concat(
-          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 22, testConcats = true, testPrepends = true).generate()
+          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 22, testConcats = true, testPrepends = true, scala3 = CrossVersion.partialVersion(scalaVersion.value).exists(_._1 == 3)).generate()
         )
       }.taskValue,
       description := "Scala tuple composition."
     )
+    .dependsOn(`tuplez-shared`)
 
 lazy val `tuplez-full-light` =
   crossProject(JVMPlatform, JSPlatform)
     .crossType(CrossType.Pure)
     .in(file("modules/full-light"))
     .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
-    .settings(ScalaOptions.fixOptions)
     .settings(commonSettings)
     .jsSettings(commonJsSettings)
     .settings(
       name := "tuplez-full-light",
       Compile / sourceGenerators += Def.task {
-        Seq.concat(
-          new TupleCompositionGenerator((Compile / sharedScalaSource).value, to = 10, generateConcats = true, generatePrepends = true).generate()
-        )
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((2, _)) =>
+            new TupleCompositionGenerator((Compile / sharedScala2Source).value, to = 10, splitPriorityAt = 6, generateConcats = true, generatePrepends = true).generate()
+          case Some((3, _)) =>
+            Seq.empty
+          case _ => Seq.empty
+        }
       }.taskValue,
       Test / sourceGenerators += Def.task {
         Seq.concat(
-          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 10, testConcats = true, testPrepends = true).generate()
+          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 10, testConcats = true, testPrepends = true, scala3 = CrossVersion.partialVersion(scalaVersion.value).exists(_._1 == 3)).generate()
         )
       }.taskValue,
       description := "Scala tuple composition."
     )
+    .dependsOn(`tuplez-shared`)
 
 lazy val `tuplez-basic` =
   crossProject(JVMPlatform, JSPlatform)
     .crossType(CrossType.Pure)
     .in(file("modules/basic"))
     .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
-    .settings(ScalaOptions.fixOptions)
     .settings(commonSettings)
     .jsSettings(commonJsSettings)
     .settings(
       name := "tuplez-basic",
       Compile / sourceGenerators += Def.task {
-        Seq.concat(
-          new TupleCompositionGenerator((Compile / sharedScalaSource).value, to = 22, generateConcats = false, generatePrepends = false).generate()
-        )
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((2, _)) =>
+            new TupleCompositionGenerator((Compile / sharedScala2Source).value, to = 22, splitPriorityAt = 6, generateConcats = false, generatePrepends = false).generate()
+          case Some((3, _)) =>
+            Seq.empty
+          case _ => Seq.empty
+        }
       }.taskValue,
       Test / sourceGenerators += Def.task {
         Seq.concat(
-          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 22, testConcats = false, testPrepends = false).generate()
+          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 22, testConcats = false, testPrepends = false, scala3 = CrossVersion.partialVersion(scalaVersion.value).exists(_._1 == 3)).generate()
         )
       }.taskValue,
       description := "Scala tuple composition."
     )
+    .dependsOn(`tuplez-shared`)
 
 lazy val `tuplez-basic-light` =
   crossProject(JVMPlatform, JSPlatform)
     .crossType(CrossType.Pure)
     .in(file("modules/basic-light"))
     .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
-    .settings(ScalaOptions.fixOptions)
     .settings(commonSettings)
     .jsSettings(commonJsSettings)
     .settings(
       name := "tuplez-basic-light",
       Compile / sourceGenerators += Def.task {
-        Seq.concat(
-          new TupleCompositionGenerator((Compile / sharedScalaSource).value, to = 10, generateConcats = false, generatePrepends = false).generate()
-        )
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((2, _)) =>
+            new TupleCompositionGenerator((Compile / sharedScala2Source).value, to = 10, splitPriorityAt = 6, generateConcats = false, generatePrepends = false).generate()
+          case Some((3, _)) =>
+            Seq.empty
+          case _ => Seq.empty
+        }
       }.taskValue,
       Test / sourceGenerators += Def.task {
         Seq.concat(
-          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 10, testConcats = false, testPrepends = false).generate()
+          new TupleCompositionTestGenerator((Test / sourceManaged).value, to = 10, testConcats = false, testPrepends = false, scala3 = CrossVersion.partialVersion(scalaVersion.value).exists(_._1 == 3)).generate()
         )
       }.taskValue,
       description := "Scala tuple composition."
     )
+    .dependsOn(`tuplez-shared`)
 
 lazy val `tuplez-apply` =
   crossProject(JVMPlatform, JSPlatform)
     .crossType(CrossType.Pure)
     .in(file("modules/apply"))
     .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
-    .settings(ScalaOptions.fixOptions)
     .settings(commonSettings)
     .jsSettings(commonJsSettings)
     .settings(
@@ -156,7 +184,8 @@ lazy val commonSettings = Seq(
     ("com.github.sbt" % "junit-interface" % "0.13.3" % Test).exclude("junit", "junit-dep")
   ),
   scalacOptions := scalacOptions.value.filterNot(_ == "-Wdead-code"),
-//  scalacOptions := scalacOptions.value.filterNot(_ == "-Xfatal-warnings")
+  Test / scalacOptions += "-Wconf:msg=a type was inferred to be `Any`:s",
+  tpolecatScalacOptions += ScalacOptions.explain
 )
 
 lazy val commonJsSettings = Seq(
@@ -188,6 +217,8 @@ lazy val root = project
   )
   .settings(noPublish)
   .aggregate(
+    `tuplez-shared`.js,
+    `tuplez-shared`.jvm,
     `tuplez-full`.js,
     `tuplez-full-light`.js,
     `tuplez-basic`.js,