fixup! fixup! fixup! ci: add gha workflow for tests, with nightly/pr/…

…manual triggers

.github/workflows/run-tests.yml

@@ -164,9 +164,9 @@ jobs:
           if bin/3mfmerge /dev/null < /dev/null; then
             echo "3mfmerge seems to be in order, skipping build"
             exit
-          fi
-          if [[ -f bin/3mfmerge ]]; then
-            echo "::warning::bin/3mfmerge is present but troublesome, forcing a rebuild..."
+          elif [[ -f bin/3mfmerge ]]; then
+            echo "::error::Cached bin/3mfmerge is troublesome, failing the job so it can be investigated"
+            exit 1
           fi
           mkdir build
           cd build
@@ -178,3 +178,16 @@ jobs:
         run: |
           ./run.sh ${{ matrix.test-params }}
         working-directory: test
+
+  # Collect results, to be used as combined status check for PRs
+  all-succeeded:
+    name: All tests passed
+    needs: run-tests
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+      - name: Report failure
+        if: contains(needs.*.result, 'failure')
+        run: |
+          echo "::error::One or more jobs failed"
+          exit 1