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ff21cc3c8d
Since root outputs can now use the planned changes, we can directly insert the correct applyable or destroyable node into the graph during plan and apply, and it will remove the outputs if they are being destroyed.
115 lines
3.8 KiB
Go
115 lines
3.8 KiB
Go
package terraform
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import (
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"log"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/dag"
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"github.com/hashicorp/terraform/lang"
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)
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// nodeExpandApplyableResource handles the first layer of resource
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// expansion during apply. Even though the resource instances themselves are
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// already expanded from the plan, we still need to expand the
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// NodeApplyableResource nodes into their respective modules.
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type nodeExpandApplyableResource struct {
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*NodeAbstractResource
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}
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var (
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_ GraphNodeDynamicExpandable = (*nodeExpandApplyableResource)(nil)
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_ GraphNodeReferenceable = (*nodeExpandApplyableResource)(nil)
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_ GraphNodeReferencer = (*nodeExpandApplyableResource)(nil)
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_ GraphNodeConfigResource = (*nodeExpandApplyableResource)(nil)
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_ GraphNodeAttachResourceConfig = (*nodeExpandApplyableResource)(nil)
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_ graphNodeExpandsInstances = (*nodeExpandApplyableResource)(nil)
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_ GraphNodeTargetable = (*nodeExpandApplyableResource)(nil)
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)
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func (n *nodeExpandApplyableResource) expandsInstances() {
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}
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func (n *nodeExpandApplyableResource) References() []*addrs.Reference {
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return (&NodeApplyableResource{NodeAbstractResource: n.NodeAbstractResource}).References()
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}
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func (n *nodeExpandApplyableResource) Name() string {
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return n.NodeAbstractResource.Name() + " (expand)"
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}
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func (n *nodeExpandApplyableResource) DynamicExpand(ctx EvalContext) (*Graph, error) {
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var g Graph
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expander := ctx.InstanceExpander()
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moduleInstances := expander.ExpandModule(n.Addr.Module)
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var resources []addrs.AbsResource
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for _, module := range moduleInstances {
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resAddr := n.Addr.Resource.Absolute(module)
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resources = append(resources, resAddr)
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g.Add(&NodeApplyableResource{
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NodeAbstractResource: n.NodeAbstractResource,
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Addr: n.Addr.Resource.Absolute(module),
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})
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}
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return &g, nil
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}
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// NodeApplyableResource represents a resource that is "applyable":
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// it may need to have its record in the state adjusted to match configuration.
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//
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// Unlike in the plan walk, this resource node does not DynamicExpand. Instead,
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// it should be inserted into the same graph as any instances of the nodes
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// with dependency edges ensuring that the resource is evaluated before any
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// of its instances, which will turn ensure that the whole-resource record
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// in the state is suitably prepared to receive any updates to instances.
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type NodeApplyableResource struct {
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*NodeAbstractResource
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Addr addrs.AbsResource
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}
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var (
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_ GraphNodeModuleInstance = (*NodeApplyableResource)(nil)
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_ GraphNodeConfigResource = (*NodeApplyableResource)(nil)
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_ GraphNodeExecutable = (*NodeApplyableResource)(nil)
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_ GraphNodeProviderConsumer = (*NodeApplyableResource)(nil)
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_ GraphNodeAttachResourceConfig = (*NodeApplyableResource)(nil)
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_ GraphNodeReferencer = (*NodeApplyableResource)(nil)
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)
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func (n *NodeApplyableResource) Path() addrs.ModuleInstance {
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return n.Addr.Module
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}
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func (n *NodeApplyableResource) References() []*addrs.Reference {
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if n.Config == nil {
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log.Printf("[WARN] NodeApplyableResource %q: no configuration, so can't determine References", dag.VertexName(n))
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return nil
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}
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var result []*addrs.Reference
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// Since this node type only updates resource-level metadata, we only
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// need to worry about the parts of the configuration that affect
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// our "each mode": the count and for_each meta-arguments.
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refs, _ := lang.ReferencesInExpr(n.Config.Count)
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result = append(result, refs...)
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refs, _ = lang.ReferencesInExpr(n.Config.ForEach)
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result = append(result, refs...)
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return result
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}
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// GraphNodeExecutable
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func (n *NodeApplyableResource) Execute(ctx EvalContext, op walkOperation) error {
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if n.Config == nil {
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// Nothing to do, then.
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log.Printf("[TRACE] NodeApplyableResource: no configuration present for %s", n.Name())
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return nil
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}
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err := n.writeResourceState(ctx, n.Addr)
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return err
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}
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