Configure a matrix-based CI build that iterates over multiple platfor…

…ms and Java versions

.github/workflows/main.yml

@@ -0,0 +1,42 @@
+name: CI build
+
+on: [push]
+
+jobs:
+  builds:
+    name: '${{ matrix.os }} with Java ${{ matrix.jdk }}'
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        jdk: [17] #, 21]
+        os: [ubuntu-latest, windows-latest] #, macos-13]
+      fail-fast: false
+      max-parallel: 4
+    timeout-minutes: 30
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Java ${{ matrix.jdk }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.jdk }}
+
+      - name: Compile
+        run: |
+          ./gradlew jar
+          ./gradlew example:jar
+
+      - name: Test
+        run: |
+          if [[ "$RUNNER_OS" == "Linux" ]]; then
+            export DISPLAY=:99.0 && /sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -ac -screen 0 1280x1024x16;
+          fi
+          ./gradlew -DciTest=true test
+        shell: bash
+
+      - name: Javadoc
+        run: |
+          ./gradlew javadoc