runtimetest: add returning validate result

Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com>

cmd/runtimetest/main.go

@@ -541,17 +541,19 @@ func validateMountsExist(spec *rspec.Spec) error {
 	return nil
 }
 
-func validate(context *cli.Context) error {
-	logLevelString := context.String("log-level")
-	logLevel, err := logrus.ParseLevel(logLevelString)
-	if err != nil {
-		return err
-	}
-	logrus.SetLevel(logLevel)
+func validateFailed(err error) error {
+	return fmt.Errorf("Runtime validation failed:\nError: %s", err.Error())
+}
+
+func validateSucceed() error {
+	fmt.Println("Runtime validation succeeded.")
+	return nil
+}
 
+func validate(context *cli.Context) error {
 	spec, err := loadSpecConfig()
 	if err != nil {
-		return err
+		return validateFailed(err)
 	}
 
 	defaultValidations := []validation{
@@ -577,19 +579,19 @@ func validate(context *cli.Context) error {
 
 	for _, v := range defaultValidations {
 		if err := v(spec); err != nil {
-			return err
+			return validateFailed(err)
 		}
 	}
 
 	if spec.Platform.OS == "linux" {
 		for _, v := range linuxValidations {
 			if err := v(spec); err != nil {
-				return err
+				return validateFailed(err)
 			}
 		}
 	}
 
-	return nil
+	return validateSucceed()
 }
 
 func main() {
@@ -599,6 +601,7 @@ func main() {
 	app.Usage = "Compare the environment with an OCI configuration"
 	app.Description = "runtimetest compares its current environment with an OCI runtime configuration read from config.json in its current working directory.  The tests are fairly generic and cover most configurations used by the runtime validation suite, but there are corner cases where a container launched by a valid runtime would not satisfy runtimetest."
 	app.UsageText = "runtimetest [options]"
+	app.Before = before
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:  "log-level",
@@ -612,3 +615,14 @@ func main() {
 		logrus.Fatal(err)
 	}
 }
+
+func before(context *cli.Context) error {
+    logLevelString := context.GlobalString("log-level")
+    logLevel, err := logrus.ParseLevel(logLevelString)
+    if err != nil {
+        logrus.Fatalf(err.Error())
+    }
+    logrus.SetLevel(logLevel)
+
+    return nil
+}