terraform/terraform/transform_attach_config_res...

75 lines
2.1 KiB
Go

package terraform
import (
"log"
"github.com/hashicorp/terraform/configs"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeAttachResourceConfig is an interface that must be implemented by nodes
// that want resource configurations attached.
type GraphNodeAttachResourceConfig interface {
GraphNodeResource
// Sets the configuration
AttachResourceConfig(*configs.Resource)
}
// AttachResourceConfigTransformer goes through the graph and attaches
// resource configuration structures to nodes that implement
// GraphNodeAttachManagedResourceConfig or GraphNodeAttachDataResourceConfig.
//
// The attached configuration structures are directly from the configuration.
// If they're going to be modified, a copy should be made.
type AttachResourceConfigTransformer struct {
Config *configs.Config // Config is the root node in the config tree
}
func (t *AttachResourceConfigTransformer) Transform(g *Graph) error {
// Go through and find GraphNodeAttachResource
for _, v := range g.Vertices() {
// Only care about GraphNodeAttachResource implementations
arn, ok := v.(GraphNodeAttachResourceConfig)
if !ok {
continue
}
// Determine what we're looking for
addr := arn.ResourceAddr()
// Get the configuration.
config := t.Config.DescendentForInstance(addr.Module)
if config == nil {
log.Printf("[TRACE] AttachResourceConfigTransformer: %q (%T) has no configuration available", dag.VertexName(v), v)
continue
}
for _, r := range config.Module.ManagedResources {
rAddr := r.Addr()
if rAddr != addr.Resource {
// Not the same resource
continue
}
log.Printf("[TRACE] AttachResourceConfigTransformer: attaching to %q (%T) config from %s", dag.VertexName(v), v, r.DeclRange)
arn.AttachResourceConfig(r)
}
for _, r := range config.Module.DataResources {
rAddr := r.Addr()
if rAddr != addr.Resource {
// Not the same resource
continue
}
log.Printf("[TRACE] AttachResourceConfigTransformer: attaching to %q (%T) config from %#v", dag.VertexName(v), v, r.DeclRange)
arn.AttachResourceConfig(r)
}
}
return nil
}