Fix undefined exception by checking if artifact exists

Author: DanielleHuisman

action.yml

@@ -32,6 +32,8 @@ inputs:
 outputs:
   total-coverage:
       description: 'The total coverage from scanned files.'
+  artifact-id:
+      description: 'The GitHub artifact id for the generated HTML report.'
 
 runs:
   using: 'node24'

dist/main/index.js

@@ -58,7 +58,7 @@ async function run() {
     }
 
     core.setOutput("total-coverage", totalCoverage);
-    core.setOutput('artifact-id', artifact.id);
+    core.setOutput('artifact-id', artifact ? artifact.id : null);
 
     if (!isMinimumCoverageReached) {
       throw Error(errorMessage);