ci: introduce Java 22 and split Native into its own job

(cherry picked from commit f1bc864)

.github/workflows/pull_request.yml

@@ -1,8 +1,22 @@
-name: JVM and OS matrix
+name: Maven
 
 on:
+  push:
+    branches: [stable, development, '*.x']
+    paths-ignore:
+      - 'LICENSE*'
+      - '.gitignore'
+      - '**.md'
+      - '**.adoc'
+      - '*.txt'
   pull_request:
     branches: [stable, development, '*.x']
+    paths-ignore:
+      - 'LICENSE*'
+      - '.gitignore'
+      - '**.md'
+      - '**.adoc'
+      - '*.txt'
 
 jobs:
   build:
@@ -13,7 +27,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
-        java-version: [ 17, 21 ] #Latest two LTS + latest non-LTS.
+        java-version: [ 17, 21, 22 ] #Latest two LTS + latest non-LTS.
     timeout-minutes: 120
     steps:
       # Clone timefold-solver

.github/workflows/pull_request_gradle.yml

@@ -1,4 +1,4 @@
-name: Gradle CI
+name: Gradle
 
 on:
   pull_request:

.github/workflows/pull_request_native.yml

@@ -0,0 +1,78 @@
+name: GraalVM Native
+
+on:
+  pull_request:
+    branches: [stable, development, '*.x']
+    paths-ignore:
+      - 'LICENSE*'
+      - '.gitignore'
+      - '**.md'
+      - '**.adoc'
+      - '*.txt'
+
+jobs:
+  build:
+    concurrency:
+      group: pull_request_native-${{ github.event_name }}-${{ github.head_ref }}-${{ matrix.module }}-${{ matrix.java-version }}
+      cancel-in-progress: true
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java-version: [ 17, 21, 22 ] #Latest two LTS + latest non-LTS.
+    timeout-minutes: 120
+    steps:
+      # Clone timefold-solver
+      # Need to check for stale repo, since Github is not aware of the build chain and therefore doesn't automate it.
+      - name: Checkout timefold-solver to access the scripts
+        uses: actions/checkout@v4
+        with:
+          path: './timefold-solver'
+          repository: 'TimefoldAI/timefold-solver'
+      - name: Find the proper timefold-solver repo and branch
+        env:
+          CHAIN_USER: ${{ github.actor }}
+          CHAIN_BRANCH: ${{ github.head_ref }}
+          CHAIN_REPO: "timefold-solver"
+          CHAIN_DEFAULT_BRANCH: ${{ endsWith(github.head_ref, '.x') && github.head_ref || 'main' }}
+        shell: bash
+        run: |
+          ./timefold-solver/.github/scripts/check_chain_repo.sh
+          rm -rf ./timefold-solver
+      - name: Checkout the proper timefold-solver branch
+        uses: actions/checkout@v4
+        with:
+          repository: ${{ env.TARGET_CHAIN_USER }}/${{ env.TARGET_CHAIN_REPO }}
+          ref: ${{ env.TARGET_CHAIN_BRANCH }}
+          path: './timefold-solver'
+          fetch-depth: 0 # Otherwise merge in the next step will fail on account of not having history.
+      - name: Prevent stale fork of timefold-solver
+        env:
+          BLESSED_REPO: "timefold-solver"
+          BLESSED_BRANCH: ${{ endsWith(github.head_ref, '.x') && github.head_ref || 'main' }}
+        shell: bash
+        working-directory: ./timefold-solver
+        run: .github/scripts/prevent_stale_fork.sh
+
+      # Clone timefold-quickstarts
+      # No need to check for stale repo, as Github merges the main repo into the fork automatically.
+      - name: Checkout timefold-quickstarts
+        uses: actions/checkout@v4
+        with:
+          path: './timefold-quickstarts'
+
+      # Build and test
+      - name: "Setup GraalVM native image"
+        uses: graalvm/setup-graalvm@v1
+        with:
+          java-version: ${{matrix.java-version}}
+          distribution: 'graalvm-community'
+          components: 'native-image'
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          cache: 'maven'
+
+      - name: Quickly build timefold-solver
+        working-directory: ./timefold-solver
+        run: mvn -B -Dquickly clean install
+      - name: Test timefold-quickstarts in Native mode
+        working-directory: ./timefold-quickstarts
+        run: mvn -B -Dnative verify