Implement optionally running this

.github/workflows/unit-tests.yml

@@ -39,14 +39,18 @@ jobs:
         TEST: [Unit, E2E]
     steps:
       - name: Skip this job when not in a merge queue for some combinations
+        id: skip_check
         run: |
           if [ "${{ !contains(github.ref, 'gh-readonly-queue') }}" ]; then
               if [ "${{ matrix.PHPVERSION }}" -ne "8.4" ]; then
-                  exit 0
+                  echo "::set-output name=skip::true"
               fi
           fi
-      - uses: actions/checkout@v4
+      - name: Get the repository
+        if: steps.skip_check.outputs.run == 'true'
+        uses: actions/checkout@v4
       - name: info
+        if: steps.skip_check.outputs.run == 'true'
         run: |
           cat /proc/cmdline && echo &&
           cat /proc/mounts && echo &&
@@ -56,27 +60,32 @@ jobs:
           cat /proc/self/cgroup && echo &&
           cat /proc/cpuinfo
       - name: pstree
+        if: steps.skip_check.outputs.run == 'true'
         run: pstree -p
       - name: Install DOMjudge
+        if: steps.skip_check.outputs.run == 'true'
         run: .github/jobs/baseinstall.sh unit install ${{ matrix.PHPVERSION }} test
       - name: Check nginx
+        if: steps.skip_check.outputs.run == 'true'
         run: curl -v https://localhost/domjudge/
       - name: Run the unit-tests
+        if: steps.skip_check.outputs.run == 'true'
         run: .github/jobs/unit-tests.sh ${{ matrix.PHPVERSION }} ${{ matrix.TEST }}
       - name: Publish Test Results
         uses: EnricoMi/publish-unit-test-result-action@v2
-        if: ${{ !cancelled() }}
+        if: "${{ steps.skip_check.outputs.run == 'true'}} && ${{ !cancelled() }}"
         with:
           files: /tmp/artifacts/unit-tests.xml
       - name: Get SQL logs
+        if: steps.skip_check.outputs.run == 'true'
         run: docker logs "${{ job.services.sqlserver.id }}"
       - name: Collect docker logs on failure
-        if: ${{ !cancelled() }}
+        if: "${{ steps.skip_check.outputs.run == 'true'}} && ${{ !cancelled() }}"
         uses: jwalton/gh-docker-logs@v1
         with:
           dest: '/tmp/docker-logs'
       - name: Upload all logs/artifacts
-        if: ${{ !cancelled() }}
+        if: "${{ steps.skip_check.outputs.run == 'true'}} && ${{ !cancelled() }}"
         uses: actions/upload-artifact@v4
         with:
           name: Logs
@@ -86,6 +95,7 @@ jobs:
             /tmp/docker-logs
             /tmp/artifacts
       - name: Verify no errors in prod.log
+        if: steps.skip_check.outputs.run == 'true'
         shell: bash
         run: |
           if cat /opt/domjudge/domserver/webapp/var/log/*.log | egrep '(CRITICAL|ERROR):'; then