Add modified build.yaml that only runs compiler tests.

.github/workflows/compiler.yaml

@@ -0,0 +1,56 @@
+name: Compiler Test Only
+on:
+  push:
+    branches:
+      - main
+      - '**'
+
+env:
+  IS_OWN_PR: "${{ secrets.MAVEN_MIRROR_URL }}"
+
+jobs:
+  compiler-tests:
+    name: "Compiler Tests (${{matrix.run}})"
+    if: ${{ !(github.ref == 'refs/heads/main' && contains(github.event.head_commit.message, '[maven-release-plugin]')) }}
+    # needs: [test-linux] # CHANGED w.r.t buid.yaml
+    runs-on: buildjet-2vcpu-ubuntu-2204
+    strategy: # CHANGED w.r.t. buildyaml
+        matrix:
+            run: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+    env:
+      MAVEN_OPTS: "-Xmx512M -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
+    steps: 
+      - uses: actions/checkout@v4
+
+      - uses: s4u/maven-settings-action@v3.1.0
+        if: ${{ env.IS_OWN_PR != '' }}
+        with:
+          servers: '[{"id": "usethesource-gh", "username":"github", "password": "${{ secrets.MAVEN_MIRROR_PASSWORD }}"}]'
+          mirrors: '[{"id": "usethesource-gh", "name": "uts mirror", "mirrorOf": "usethesource", "url": "${{ secrets.MAVEN_MIRROR_URL }}"}]'
+      - uses: actions/setup-java@v4
+        with:
+          java-version: 11
+          distribution: 'temurin'
+          cache: 'maven'
+          overwrite-settings: false
+
+      - name: Retrieve dependencies for integration tests
+        run: bash src/org/rascalmpl/compiler/lang/rascalcore/check/tests/download-test-jars.sh
+
+      - name: Run Tests
+        run: mvn -B -Pcompiler-tests -Drascal.compile.skip -Drascal.tutor.skip -Drascal.test.memory=10 test
+
+      - uses: codecov/codecov-action@v4
+        continue-on-error: true # sometimes this one fails, that shouldn't stop a build
+        with:
+          fail_ci_if_error: false
+          verbose: true
+          token: ${{ secrets.CODECOV_TOKEN }}
+
+      - name: Publish Test Report on github action
+        if: ${{ always() && github.event_name != 'pull_request' }} # to bad this doesn't work nicely with external pull requests
+        continue-on-error: true # sometimes this one fails, that shouldn't stop a build
+        uses: scacap/action-surefire-report@v1
+        with:
+          check_name: "Compiler Test Report"
+