Changed behavio on environment

- variables are all in values.yaml as "template string". This means that
  we can now set values to reference others (useful with mapenv label)
- we can also set any variable as a secret

helm/configAndSecretMap.go

@@ -10,6 +10,7 @@ import (
 // InlineConfig is made to represent a configMap or a secret
 type InlineConfig interface {
 	AddEnvFile(filename string) error
+	AddEnv(key, val string) error
 	Metadata() *Metadata
 }
 
@@ -56,9 +57,12 @@ func (c *ConfigMap) AddEnvFile(file string) error {
 		}
 		c.Data[parts[0]] = parts[1]
 	}
-
 	return nil
+}
 
+func (c *ConfigMap) AddEnv(key, val string) error {
+	c.Data[key] = val
+	return nil
 }
 
 // Secret is made to represent a secret with data.
@@ -108,3 +112,9 @@ func (s *Secret) AddEnvFile(file string) error {
 func (s *Secret) Metadata() *Metadata {
 	return s.K8sBase.Metadata
 }
+
+// AddEnv adds an environment variable to the secret.
+func (s *Secret) AddEnv(key, val string) error {
+	s.Data[key] = fmt.Sprintf(`{{ %s | b64enc }}`, val)
+	return nil
+}