96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
package terraform
|
|
|
|
import (
|
|
"log"
|
|
|
|
"github.com/hashicorp/terraform/configs"
|
|
"github.com/hashicorp/terraform/dag"
|
|
)
|
|
|
|
// OutputTransformer is a GraphTransformer that adds all the outputs
|
|
// in the configuration to the graph.
|
|
//
|
|
// This is done for the apply graph builder even if dependent nodes
|
|
// aren't changing since there is no downside: the state will be available
|
|
// even if the dependent items aren't changing.
|
|
type OutputTransformer struct {
|
|
Config *configs.Config
|
|
}
|
|
|
|
func (t *OutputTransformer) Transform(g *Graph) error {
|
|
return t.transform(g, t.Config)
|
|
}
|
|
|
|
func (t *OutputTransformer) transform(g *Graph, c *configs.Config) error {
|
|
// If we have no config then there can be no outputs.
|
|
if c == nil {
|
|
return nil
|
|
}
|
|
|
|
// Transform all the children. We must do this first because
|
|
// we can reference module outputs and they must show up in the
|
|
// reference map.
|
|
for _, cc := range c.Children {
|
|
if err := t.transform(g, cc); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Our addressing system distinguishes between modules and module instances,
|
|
// but we're not yet ready to make that distinction here (since we don't
|
|
// support "count"/"for_each" on modules) and so we just do a naive
|
|
// transform of the module path into a module instance path, assuming that
|
|
// no keys are in use. This should be removed when "count" and "for_each"
|
|
// are implemented for modules.
|
|
path := c.Path.UnkeyedInstanceShim()
|
|
|
|
for _, o := range c.Module.Outputs {
|
|
addr := path.OutputValue(o.Name)
|
|
node := &NodeApplyableOutput{
|
|
Addr: addr,
|
|
Config: o,
|
|
}
|
|
g.Add(node)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// DestroyOutputTransformer is a GraphTransformer that adds nodes to delete
|
|
// outputs during destroy. We need to do this to ensure that no stale outputs
|
|
// are ever left in the state.
|
|
type DestroyOutputTransformer struct {
|
|
}
|
|
|
|
func (t *DestroyOutputTransformer) Transform(g *Graph) error {
|
|
for _, v := range g.Vertices() {
|
|
output, ok := v.(*NodeApplyableOutput)
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
// create the destroy node for this output
|
|
node := &NodeDestroyableOutput{
|
|
Addr: output.Addr,
|
|
Config: output.Config,
|
|
}
|
|
|
|
log.Printf("[TRACE] creating %s", node.Name())
|
|
g.Add(node)
|
|
|
|
deps, err := g.Descendents(v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// the destroy node must depend on the eval node
|
|
deps.Add(v)
|
|
|
|
for _, d := range deps.List() {
|
|
log.Printf("[TRACE] %s depends on %s", node.Name(), dag.VertexName(d))
|
|
g.Connect(dag.BasicEdge(node, d))
|
|
}
|
|
}
|
|
return nil
|
|
}
|