Minor: better error handling

Author: grussorusso

internal/asl/state_machine.go

@@ -112,6 +112,9 @@ func parseStates(statesData string) (map[string]State, error) {
 		}
 
 		parseable := emptyParsableFromType(StateType(stateType))
+		if parseable == nil {
+			return fmt.Errorf("invalid state type %s", stateType)
+		}
 		parsedState, err := parseable.ParseFrom(value)
 		if err != nil {
 			return fmt.Errorf("failed to parse state %s ...\n%v", value[:40], err)

internal/cli/cli.go

@@ -211,6 +211,10 @@ func invoke(cmd *cobra.Command, args []string) {
 	}
 	if len(paramsFile) > 0 {
 		jsonFile, err := os.Open(paramsFile)
+		if err != nil {
+			fmt.Printf("Could not open parameters file '%s'\n", paramsFile)
+			os.Exit(1)
+		}
 
 		defer func(jsonFile *os.File) {
 			err := jsonFile.Close()
@@ -516,6 +520,10 @@ func invokeWorkflow(cmd *cobra.Command, args []string) {
 	}
 	if len(paramsFile) > 0 {
 		jsonFile, err := os.Open(paramsFile)
+		if err != nil {
+			fmt.Printf("Could not open parameters file '%s'\n", paramsFile)
+			os.Exit(1)
+		}
 		defer jsonFile.Close()
 		byteValue, _ := io.ReadAll(jsonFile)
 		err = json.Unmarshal(byteValue, &paramsMap)