cli/app/new.go

@@ -126,7 +126,7 @@ var appNewCommand = cli.Command{
 				logrus.Fatal(err)
 			}
 
-			if err := ensureSecretLengths(secrets, internal.Domain); err != nil {
+			if err := ensureSecretLengths(secrets, sanitisedAppName); err != nil {
 				logrus.Fatal(err)
 			}
 
@@ -262,20 +262,35 @@ func ensureServerFlag() error {
 	return nil
 }
 
-func ensureSecretLengths(secrets AppSecrets, domain string) error {
-	domainLength := len(domain)
+func ensureSecretLengths(secrets AppSecrets, sanitisedAppName string) error {
+	if len(sanitisedAppName) > 45 {
+		sanitisedAppName = sanitisedAppName[:45]
+	}
+
+	domainLength := len(sanitisedAppName)
 	failingSecrets := []string{}
+	maxSecretLength := 0
 
 	for secretName := range secrets {
-		if len(secretName)+domainLength > 64 {
+
+		if len(secretName) > maxSecretLength {
+			maxSecretLength = len(secretName)
+		}
+
+		if len(secretName+"_v1")+domainLength > 64 {
 			failingSecrets = append(failingSecrets, secretName)
 		}
 	}
 
 	if len(failingSecrets) > 0 {
 		failedSecretsString := strings.Join(failingSecrets, ", ")
-		return fmt.Errorf("The following secrets are too long to work with the domain name %s, change their length or use a shorter domain name: %s", domain, failedSecretsString)
+		return fmt.Errorf("the following secrets are too long to work with the domain name %s, change their length or use a shorter domain name: %s", sanitisedAppName, failedSecretsString)
 	}
 
+	logrus.Debugf(
+		`The longest secret name is %d 
+including 4 extra characters for format %s_<name>_v1 
+fits with domain length of %d for max docker secret length of %d`,
+		maxSecretLength, sanitisedAppName, domainLength, domainLength+maxSecretLength+4)
 	return nil
 }