fix bug on searchDependencyPackagesReverse

Signed-off-by: pxp928 <parth.psu@gmail.com>

cmd/guacone/cmd/vulnerability.go

@@ -210,20 +210,20 @@ func printVulnInfoByVulnId(ctx context.Context, gqlclient graphql.Client, t tabl
 			logger.Fatalf("error querying neighbor: %v", err)
 		}
 	} else {
-		foundHasSBOMPkg, err := model.HasSBOMs(ctx, gqlclient, model.HasSBOMSpec{Uri: &opts.searchString})
+		foundHasSBOM, err := model.HasSBOMs(ctx, gqlclient, model.HasSBOMSpec{Uri: &opts.searchString})
 		if err != nil {
 			logger.Fatalf("failed getting hasSBOM via URI: %s with error: %w", opts.searchString, err)
 		}
-		if len(foundHasSBOMPkg.HasSBOM) != 1 {
+		if len(foundHasSBOM.HasSBOM) != 1 {
 			logger.Fatalf("failed to located singular hasSBOM based on URI")
 		}
-		if pkgResponse, ok := foundHasSBOMPkg.HasSBOM[0].Subject.(*model.AllHasSBOMTreeSubjectPackage); ok {
+		if pkgResponse, ok := foundHasSBOM.HasSBOM[0].Subject.(*model.AllHasSBOMTreeSubjectPackage); ok {
 			var vulnNeighborError error
 			path, tableRows, vulnNeighborError = queryVulnsViaVulnNodeNeighbors(ctx, gqlclient, pkgResponse.Namespaces[0].Names[0].Versions[0].Id, vulnResponse.Vulnerabilities, opts.depth, opts.pathsToReturn)
 			if vulnNeighborError != nil {
 				logger.Fatalf("error querying neighbor: %v", err)
 			}
-		} else if artResponse, ok := foundHasSBOMPkg.HasSBOM[0].Subject.(*model.AllHasSBOMTreeSubjectArtifact); ok {
+		} else if artResponse, ok := foundHasSBOM.HasSBOM[0].Subject.(*model.AllHasSBOMTreeSubjectArtifact); ok {
 			occur := searchArtToPkg(ctx, gqlclient, artResponse.Algorithm+":"+artResponse.Digest, logger)
 			subjectPackage, ok := occur.IsOccurrence[0].Subject.(*model.AllIsOccurrencesTreeSubjectPackage)
 			if ok {
@@ -233,9 +233,8 @@ func printVulnInfoByVulnId(ctx context.Context, gqlclient graphql.Client, t tabl
 					logger.Fatalf("error querying neighbor: %v", err)
 				}
 			}
-
 		} else {
-			logger.Fatalf("located hasSBOM does not have a subject that is a package")
+			logger.Fatalf("located hasSBOM does not have a subject that is a package or artifact")
 		}
 	}
 	if len(path) > 0 {
@@ -380,8 +379,9 @@ func searchDependencyPackagesReverse(ctx context.Context, gqlclient graphql.Clie
 		nodeMap[now] = nowNode
 	}
 
+	// not found so return nil
 	if topPkgID != "" && !found {
-		return nil, fmt.Errorf("no path found up to specified length")
+		return nil, nil
 	}
 
 	var now string