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https://github.com/opentofu/opentofu.git
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a3403f2766
Due to how often the state and plan types are referenced throughout Terraform, there isn't a great way to switch them out gradually. As a consequence, this huge commit gets us from the old world to a _compilable_ new world, but still has a large number of known test failures due to key functionality being stubbed out. The stubs here are for anything that interacts with providers, since we now need to do the follow-up work to similarly replace the old terraform.ResourceProvider interface with its replacement in the new "providers" package. That work, along with work to fix the remaining failing tests, will follow in subsequent commits. The aim here was to replace all references to terraform.State and its downstream types with states.State, terraform.Plan with plans.Plan, state.State with statemgr.State, and switch to the new implementations of the state and plan file formats. However, due to the number of times those types are used, this also ended up affecting numerous other parts of core such as terraform.Hook, the backend.Backend interface, and most of the CLI commands. Just as with 5861dbf3fc49b19587a31816eb06f511ab861bb4 before, I apologize in advance to the person who inevitably just found this huge commit while spelunking through the commit history.
86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
package terraform
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import (
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"fmt"
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"log"
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"github.com/hashicorp/terraform/dag"
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"github.com/hashicorp/terraform/plans"
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"github.com/hashicorp/terraform/states"
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)
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// DiffTransformer is a GraphTransformer that adds graph nodes representing
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// each of the resource changes described in the given Changes object.
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type DiffTransformer struct {
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Concrete ConcreteResourceInstanceNodeFunc
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Changes *plans.Changes
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}
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func (t *DiffTransformer) Transform(g *Graph) error {
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if t.Changes == nil || len(t.Changes.Resources) == 0 {
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// Nothing to do!
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return nil
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}
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// Go through all the modules in the diff.
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log.Printf("[TRACE] DiffTransformer starting")
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for _, rc := range t.Changes.Resources {
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addr := rc.Addr
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dk := rc.DeposedKey
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// Depending on the action we'll need some different combinations of
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// nodes, because destroying uses a special node type separate from
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// other actions.
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var update, delete bool
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switch rc.Action {
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case plans.Delete:
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delete = true
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case plans.Replace:
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update = true
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delete = true
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default:
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update = true
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}
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if update {
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// All actions except destroying the node type chosen by t.Concrete
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abstract := NewNodeAbstractResourceInstance(addr)
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var node dag.Vertex = abstract
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if f := t.Concrete; f != nil {
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node = f(abstract)
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}
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if dk != states.NotDeposed {
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// The only valid action for deposed objects is to destroy them.
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// Entering this branch suggests a bug in the plan phase that
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// proposed this change.
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return fmt.Errorf("invalid %s action for deposed object on %s: only Delete is allowed", rc.Action, addr)
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}
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log.Printf("[TRACE] DiffTransformer: %s will be represented by %s", addr, dag.VertexName(node))
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g.Add(node)
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}
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if delete {
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// Destroying always uses this destroy-specific node type.
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abstract := NewNodeAbstractResourceInstance(addr)
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node := &NodeDestroyResourceInstance{
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NodeAbstractResourceInstance: abstract,
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DeposedKey: dk,
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}
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if dk == states.NotDeposed {
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log.Printf("[TRACE] DiffTransformer: %s will be represented for destruction by %s", addr, dag.VertexName(node))
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} else {
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log.Printf("[TRACE] DiffTransformer: %s deposed object %s will be represented for destruction by %s", addr, dk, dag.VertexName(node))
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}
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g.Add(node)
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}
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}
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log.Printf("[TRACE] DiffTransformer complete")
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return nil
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}
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