[#222] addressed review comments

backend/server/restservice/machines.go

@@ -56,22 +56,11 @@ func (r *RestAPI) GetSoftwareVersions(ctx context.Context, params general.GetSof
 	}
 
 	// Find the location of the JSON file with software versions metadata.
-	var jsonFile string
-	for _, f := range getPotentialVersionsJSONLocations() {
-		_, err := os.Stat(f)
-		if err == nil {
-			jsonFile = f
-			break
-		}
-	}
-	if jsonFile == "" {
-		msg := "Cannot find the JSON file with software versions metadata"
-		log.Error(msg)
-		rsp := general.NewGetSoftwareVersionsDefault(http.StatusInternalServerError).WithPayload(&models.APIError{
-			Message: &msg,
-		})
-		return rsp
+	searchPaths := []string{
+		VersionsJSON,        // this is default location of the file in case Stork is installed from packages - most common use case
+		"etc/versions.json", // this is added in case Stork is built and ran from sources - typical for Stork development
 	}
+	jsonFile := storkutil.GetFirstExistingPathOrDefault(VersionsJSON, searchPaths...)
 
 	// Open JSON file.
 	file, err := os.Open(jsonFile)

backend/server/restservice/swversions.go

@@ -40,14 +40,6 @@ type ReportAppsVersions struct {
 // It needs to be modified by tests so it has to be global variable.
 var VersionsJSON = "/etc/stork/versions.json" //nolint:gochecknoglobals
 
-// Get potential locations of versions.json.
-func getPotentialVersionsJSONLocations() []string {
-	return []string{
-		VersionsJSON,        // this is default location of the file in case Stork is installed from packages - most common use case
-		"etc/versions.json", // this is added in case Stork is built and ran from sources - typical for Stork development
-	}
-}
-
 // Post processes either Kea, Bind9 or Stork version metadata and returns the data in REST API format.
 // It returns an error when problem occurs when parsing dates.
 func appVersionMetadataToRestAPI(input ReportAppVersionMetadata) (*models.AppVersionMetadata, error) {

backend/server/restservice/swversions_test.go

@@ -117,8 +117,8 @@ func TestVersionDetailsToRestAPIError(t *testing.T) {
 		Esv:         esv,
 	}
 	resultOne, err1 := versionDetailsToRestAPI(exampleOne)
+
 	relDate = "bad date"
-	eolDate = "2026-12-31"
 	exampleTwo := ReportVersionDetails{
 		Version:     storkutil.NewSemanticVersion(3, 2, 1),
 		ReleaseDate: &relDate,
@@ -195,12 +195,3 @@ func TestAppVersionMetadataToRestAPI(t *testing.T) {
 	require.Equal(t, "9.18.30", bind.SortedStableVersions[0])
 	require.Equal(t, "9.20.2", bind.SortedStableVersions[1])
 }
-
-// Check if TestGetPotentialVersionsJSONLocations returns paths.
-func TestGetPotentialVersionsJSONLocations(t *testing.T) {
-	// Arrange & Act
-	paths := getPotentialVersionsJSONLocations()
-
-	// Assert
-	require.Greater(t, len(paths), 1)
-}