Check binary compatibility with earlier release version

.github/actions/check-compat/action.yml

@@ -0,0 +1,46 @@
+name: 'Check'
+author: 'EnricoMi'
+description: 'A GitHub Action that checks compatibility of spark-extension'
+
+inputs:
+  spark-compat-version:
+    description: Spark compatibility version, e.g. 3.4
+    required: true
+  scala-compat-version:
+    description: Scala compatibility version, e.g. 2.12
+    required: true
+  package-version:
+    description: Spark-Extension version to check against
+    required: true
+
+runs:
+  using: 'composite'
+  steps:
+  - name: Setup JDK 1.8
+    uses: actions/setup-java@v3
+    with:
+      java-version: '8'
+      distribution: 'zulu'
+
+  - name: Install Checker
+    run: apt install japi-compliance-checker
+    shell: bash
+
+  - name: Fetch package
+    run: |
+      mvn dependency:get -DremoteRepositories -Dartifact=uk.co.gresearch.spark:spark-extension_${{ inputs.scala-compat-version }}:${{ inputs.package-version }}-${{ inputs.spark-compat-version }}
+    shell: bash
+
+  - name: Check
+    run: japi-compliance-checker ~/.m2/repository/uk/co/gresearch/spark/spark-extension_${{ inputs.scala-compat-version }}/${{ inputs.package-version }}-${{ inputs.spark-compat-version }}/spark-extension_${{ inputs.scala-compat-version }}-${{ inputs.package-version }}-${{ inputs.spark-compat-version }}.jar target/spark-extension*.jar
+    shell: bash
+
+  - name: Upload Report
+    uses: actions/upload-artifact@v3
+    with:
+      name: Compat-Report-${{ inputs.spark-compat-version }}-${{ inputs.scala-compat-version }}
+      path: compat_reports/spark-extension/*
+
+branding:
+  icon: 'check-circle'
+  color: 'green'

.github/workflows/check.yml

@@ -0,0 +1,76 @@
+name: Check
+
+on:
+  workflow_call:
+    inputs:
+      package-version:
+        required: true
+        type: string
+jobs:
+  config:
+    name: Configure check
+    runs-on: ubuntu-latest
+    outputs:
+      major-version: ${{ steps.versions.outputs.major-version }}
+      latest-release-version: ${{ steps.versions.outputs.latest-release-version }}
+      latest-release-major-version: ${{ steps.versions.outputs.latest-release-major-version }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Get versions
+        id: versions
+        run: |
+          version=$(grep -m1 version pom.xml | sed -e "s/<[^>]*>//g" -e "s/ //g")
+          echo "version=$release_version" >> "$GITHUB_OUTPUT"
+          echo "major-version=${release_version/.*/}" >> "$GITHUB_OUTPUT"
+
+          release_version=$(git tag | tail -n1 | sed "s/^v//")
+          echo "latest-release-version=$release_version" >> "$GITHUB_OUTPUT"
+          echo "latest-release-major-version=${release_version/.*/}" >> "$GITHUB_OUTPUT"
+        shell: bash
+
+  check:
+    name: Check (Spark ${{ matrix.spark-compat-version }} Scala ${{ matrix.scala-version }})
+    needs: config
+    runs-on: ubuntu-latest
+    if: needs.config.outputs.major-version == needs.config.outputs.latest-release-major-version
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - spark-compat-version: '3.0'
+            scala-compat-version: '2.12'
+          - spark-compat-version: '3.1'
+            scala-compat-version: '2.12'
+          - spark-compat-version: '3.2'
+            scala-compat-version: '2.12'
+          - spark-compat-version: '3.3'
+            scala-compat-version: '2.12'
+          - spark-compat-version: '3.4'
+            scala-compat-version: '2.12'
+          - spark-compat-version: '3.5'
+            scala-compat-version: '2.12'
+
+          - spark-compat-version: '3.2'
+            scala-compat-version: '2.13'
+          - spark-compat-version: '3.3'
+            scala-compat-version: '2.13'
+          - spark-compat-version: '3.4'
+            scala-compat-version: '2.13'
+          - spark-compat-version: '3.5'
+            scala-compat-version: '2.12'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Check
+        uses: ./.github/actions/check-compat
+        with:
+          spark-compat-version: ${{ matrix.spark-compat-version }}
+          scala-version: ${{ matrix.scala-version }}
+          spark-compat-version: ${{ matrix.spark-compat-version }}
+          package-version: ${{ needs.config.outputs.latest-release-version }}

.github/workflows/ci.yml

@@ -46,6 +46,10 @@ jobs:
     name: "Test Snapshots"
     needs: build-snapshots
     uses: "./.github/workflows/test-snapshots.yml"
+  check:
+    name: "Check"
+    needs: [build-jvm, build-snapshots]
+    uses: "./.github/workflows/check.yml"
 
   test_success:
     name: "Test success"