Reworked activation helper env var check

Signed-off-by: Andrei Lopukhov <[email protected]>

cmd/rootlesskit/main.go

@@ -42,10 +42,7 @@ const (
 )
 
 func main() {
-	iAmActivationHelper, err := strconv.ParseBool(os.Getenv(runActivationHelperEnvKey))
-	if err != nil {
-	  iAmActivationHelper = false
-	}
+	iAmActivationHelper := checkActivationHelper()
 	iAmChild := os.Getenv(pipeFDEnvKey) != ""
 	id := "parent"
 	if iAmChild {
@@ -686,6 +683,18 @@ func unameM() string {
 	return machine
 }
 
+func checkActivationHelper() bool {
+    envValue, envSet := os.LookupEnv(runActivationHelperEnvKey)
+    if !envSet {
+        return false
+    }
+	activationHelperValue, err := strconv.ParseBool(envValue)
+	if err != nil {
+	    panic(fmt.Sprintf("Env variable [%s] is set to [%s] and cannot be parsed", runActivationHelperEnvKey, envValue))
+	}
+	return activationHelperValue
+}
+
 func createActivationOpts(clicontext *cli.Context) (activation.Opt, error) {
   opt := activation.Opt {
       RunActivationHelperEnvKey: runActivationHelperEnvKey,