chore: add MiMa checks for tasty-core

Author: hamzaremmal

.github/workflows/stdlib.yaml

@@ -337,6 +337,24 @@ jobs:
       - name: Report MiMa issues in `scala3-interfaces`
         run: ./project/scripts/sbt scala3-interfaces/mimaReportBinaryIssues
 
+  mima-tasty-core-nonbootstrapped:
+    runs-on: ubuntu-latest
+    needs: tasty-core-nonbootstrapped
+    steps:
+      - name: Git Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v5
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: 'sbt'
+
+      - uses: sbt/setup-sbt@v1
+      - name: Report MiMa issues in `tasty-core-nonbootstrapped`
+        run: ./project/scripts/sbt tasty-core-nonbootstrapped/mimaReportBinaryIssues
+
   mima-scala-library-bootstrapped:
     runs-on: ubuntu-latest
     needs: scala-library-bootstrapped
@@ -355,6 +373,24 @@ jobs:
       - name: Report MiMa issues in `scala-library-bootstrapped`
         run: ./project/scripts/sbt scala-library-bootstrapped/mimaReportBinaryIssues
 
+  mima-tasty-core-bootstrapped:
+    runs-on: ubuntu-latest
+    needs: tasty-core-bootstrapped
+    steps:
+      - name: Git Checkout
+        uses: actions/checkout@v5
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v5
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          cache: 'sbt'
+
+      - uses: sbt/setup-sbt@v1
+      - name: Report MiMa issues in `tasty-core-bootstrapped`
+        run: ./project/scripts/sbt tasty-core-bootstrapped-new/mimaReportBinaryIssues
+
   #################################################################################################
   ########################################### TEST JOBS ###########################################
   #################################################################################################

project/Build.scala

@@ -1973,6 +1973,7 @@ object Build {
   /* Configuration of the org.scala-lang:tasty-core_3:*.**.**-nonbootstrapped project */
   lazy val `tasty-core-nonbootstrapped` = project.in(file("tasty"))
     .dependsOn(`scala3-library-nonbootstrapped`)
+    .settings(commonMiMaSettings)
     .settings(
       name          := "tasty-core-nonbootstrapped",
       moduleName    := "tasty-core",
@@ -2026,13 +2027,16 @@ object Build {
       Test / envVars ++= Map(
         "EXPECTED_TASTY_VERSION" -> expectedTastyVersion,
       ),
-
+      mimaForwardIssueFilters := MiMaFilters.TastyCore.ForwardsBreakingChanges,
+      mimaBackwardIssueFilters := MiMaFilters.TastyCore.BackwardsBreakingChanges,
+      customMimaReportBinaryIssues("MiMaFilters.TastyCore"),
     )
 
   /* Configuration of the org.scala-lang:tasty-core_3:*.**.**-bootstrapped project */
   lazy val `tasty-core-bootstrapped-new` = project.in(file("tasty"))
     .dependsOn(`scala3-library-bootstrapped-new`)
     .settings(publishSettings)
+    .settings(commonMiMaSettings)
     .settings(
       name          := "tasty-core-bootstrapped",
       moduleName    := "tasty-core",
@@ -2095,6 +2099,9 @@ object Build {
       Test / envVars ++= Map(
         "EXPECTED_TASTY_VERSION" -> expectedTastyVersion,
       ),
+      mimaForwardIssueFilters := MiMaFilters.TastyCore.ForwardsBreakingChanges,
+      mimaBackwardIssueFilters := MiMaFilters.TastyCore.BackwardsBreakingChanges,
+      customMimaReportBinaryIssues("MiMaFilters.TastyCore"),
     )
 
   // ==============================================================================================

project/MiMaFilters.scala

@@ -617,6 +617,13 @@ object MiMaFilters {
     )
 
     val BackwardsBreakingChanges: Map[String, Seq[ProblemFilter]] = Map(
+      Build.mimaPreviousDottyVersion -> Seq(
+        // These are legitimate issues that needs to be investigated
+        ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyVersion.copy"),
+        ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyVersion.copy$default$1"),
+        ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyVersion.copy$default$2"),
+        ProblemFilters.exclude[DirectMissingMethodProblem]("dotty.tools.tasty.TastyVersion.copy$default$3"),
+      ),
       // Breaking changes since last LTS
       Build.mimaPreviousLTSDottyVersion -> Seq.empty // We should never break backwards compatibility
     )