Print a message when no metrics.json is found

Author: Kobzol

.github/workflows/ci.yml

@@ -245,6 +245,8 @@ jobs:
             ./build/citool/debug/citool postprocess-metrics build/metrics.json ${GITHUB_STEP_SUMMARY}
           elif [ -f obj/build/metrics.json ]; then
             ./build/citool/debug/citool postprocess-metrics obj/build/metrics.json ${GITHUB_STEP_SUMMARY}
+          else
+            echo "No metrics.json found"
           fi
 
       - name: upload job metrics to DataDog

src/ci/citool/src/metrics.rs

@@ -10,6 +10,7 @@ pub fn postprocess_metrics(metrics_path: &Path, summary_path: &Path) -> anyhow::
     let suites = get_test_suites(&metrics);
 
     if suites.is_empty() {
+        eprintln!("No test suites found in {}", metrics_path.display());
         return Ok(());
     }
 
@@ -24,6 +25,8 @@ pub fn postprocess_metrics(metrics_path: &Path, summary_path: &Path) -> anyhow::
     writeln!(file, "\n# Test results\n")?;
     writeln!(file, "{table}")?;
 
+    eprintln!("Written test suite summary into {}", summary_path.display());
+
     Ok(())
 }