terraform/terraform/transform_config_flat.go

72 lines
1.9 KiB
Go

package terraform
import (
"github.com/hashicorp/terraform/configs"
"github.com/hashicorp/terraform/dag"
)
// FlatConfigTransformer is a GraphTransformer that adds the configuration
// to the graph. The module used to configure this transformer must be
// the root module.
//
// This transform adds the nodes but doesn't connect any of the references.
// The ReferenceTransformer should be used for that.
//
// NOTE: In relation to ConfigTransformer: this is a newer generation config
// transformer. It puts the _entire_ config into the graph (there is no
// "flattening" step as before).
type FlatConfigTransformer struct {
Concrete ConcreteResourceNodeFunc // What to turn resources into
Config *configs.Config
}
func (t *FlatConfigTransformer) Transform(g *Graph) error {
// We have nothing to do if there is no configuration.
if t.Config == nil {
return nil
}
return t.transform(g, t.Config)
}
func (t *FlatConfigTransformer) transform(g *Graph, config *configs.Config) error {
// If we have no configuration then there's nothing to do.
if config == nil {
return nil
}
// Transform all the children.
for _, c := range config.Children {
if err := t.transform(g, c); err != nil {
return err
}
}
module := config.Module
// For now we assume that each module call produces only one module
// instance with no key, since we don't yet support "count" and "for_each"
// on modules.
// FIXME: As part of supporting "count" and "for_each" on modules, rework
// this so that we'll "expand" the module call first and then create graph
// nodes for each module instance separately.
instPath := config.Path.UnkeyedInstanceShim()
for _, r := range module.ManagedResources {
addr := r.Addr().Absolute(instPath)
abstract := &NodeAbstractResource{
Addr: addr,
Config: r,
}
// Grab the address for this resource
var node dag.Vertex = abstract
if f := t.Concrete; f != nil {
node = f(abstract)
}
g.Add(node)
}
return nil
}