terraform/terraform/transform_config.go

105 lines
2.4 KiB
Go

package terraform
import (
"log"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/configs"
"github.com/hashicorp/terraform/dag"
)
// ConfigTransformer is a GraphTransformer that adds all the resources
// from the configuration to the graph.
//
// The module used to configure this transformer must be the root module.
//
// Only resources are added to the graph. Variables, outputs, and
// providers must be added via other transforms.
//
// Unlike ConfigTransformerOld, this transformer creates a graph with
// all resources including module resources, rather than creating module
// nodes that are then "flattened".
type ConfigTransformer struct {
Concrete ConcreteResourceNodeFunc
// Module is the module to add resources from.
Config *configs.Config
// Unique will only add resources that aren't already present in the graph.
Unique bool
// Mode will only add resources that match the given mode
ModeFilter bool
Mode addrs.ResourceMode
}
func (t *ConfigTransformer) Transform(g *Graph) error {
// If no configuration is available, we don't do anything
if t.Config == nil {
return nil
}
// Start the transformation process
return t.transform(g, t.Config)
}
func (t *ConfigTransformer) transform(g *Graph, config *configs.Config) error {
// If no config, do nothing
if config == nil {
return nil
}
// Add our resources
if err := t.transformSingle(g, config); err != nil {
return err
}
// Transform all the children.
for _, c := range config.Children {
if err := t.transform(g, c); err != nil {
return err
}
}
return nil
}
func (t *ConfigTransformer) transformSingle(g *Graph, config *configs.Config) error {
path := config.Path
module := config.Module
log.Printf("[TRACE] ConfigTransformer: Starting for path: %v", path)
allResources := make([]*configs.Resource, 0, len(module.ManagedResources)+len(module.DataResources))
for _, r := range module.ManagedResources {
allResources = append(allResources, r)
}
for _, r := range module.DataResources {
allResources = append(allResources, r)
}
for _, r := range allResources {
relAddr := r.Addr()
if t.ModeFilter && relAddr.Mode != t.Mode {
// Skip non-matching modes
continue
}
abstract := &NodeAbstractResource{
Addr: addrs.ConfigResource{
Resource: relAddr,
Module: path,
},
}
var node dag.Vertex = abstract
if f := t.Concrete; f != nil {
node = f(abstract)
}
g.Add(node)
}
return nil
}