terraform: store the configuration on the Terraform struct

terraform/terraform.go

@@ -13,6 +13,7 @@ import (
 type Terraform struct {
 	config    *config.Config
 	mapping   map[*config.Resource]ResourceProvider
+	variables map[string]string
 }
 
 // Config is the configuration that must be given to instantiate
@@ -100,6 +101,7 @@ func New(c *Config) (*Terraform, error) {
 	return &Terraform{
 		config:    c.Config,
 		mapping:   mapping,
+		variables: c.Variables,
 	}, nil
 }