98 lines
2.9 KiB
Go
98 lines
2.9 KiB
Go
package terraform
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import (
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"fmt"
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"github.com/hashicorp/terraform/addrs"
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)
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// NodeModuleRemoved represents a module that is no longer in the
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// config.
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type NodeModuleRemoved struct {
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Addr addrs.ModuleInstance
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}
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var (
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_ GraphNodeSubPath = (*NodeModuleRemoved)(nil)
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_ RemovableIfNotTargeted = (*NodeModuleRemoved)(nil)
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_ GraphNodeEvalable = (*NodeModuleRemoved)(nil)
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_ GraphNodeReferencer = (*NodeModuleRemoved)(nil)
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_ GraphNodeReferenceOutside = (*NodeModuleRemoved)(nil)
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)
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func (n *NodeModuleRemoved) Name() string {
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return fmt.Sprintf("%s (removed)", n.Addr.String())
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}
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// GraphNodeSubPath
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func (n *NodeModuleRemoved) Path() addrs.ModuleInstance {
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return n.Addr
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}
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// GraphNodeModulePath implementation
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func (n *NodeModuleRemoved) ModulePath() addrs.Module {
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// This node represents the module call within a module,
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// so return the CallerAddr as the path as the module
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// call may expand into multiple child instances
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return n.Addr.Module()
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}
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// GraphNodeEvalable
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func (n *NodeModuleRemoved) EvalTree() EvalNode {
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return &EvalOpFilter{
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Ops: []walkOperation{walkRefresh, walkApply, walkDestroy},
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Node: &EvalCheckModuleRemoved{
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Addr: n.Addr,
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},
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}
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}
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func (n *NodeModuleRemoved) ReferenceOutside() (selfPath, referencePath addrs.Module) {
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// Our "References" implementation indicates that this node depends on
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// the call to the module it represents, which implicitly depends on
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// everything inside the module. That reference must therefore be
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// interpreted in terms of our parent module.
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return n.Addr.Module(), n.Addr.Parent().Module()
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}
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func (n *NodeModuleRemoved) References() []*addrs.Reference {
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// We depend on the call to the module we represent, because that
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// implicitly then depends on everything inside that module.
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// Our ReferenceOutside implementation causes this to be interpreted
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// within the parent module.
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_, call := n.Addr.CallInstance()
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return []*addrs.Reference{
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{
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Subject: call,
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// No source range here, because there's nothing reasonable for
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// us to return.
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},
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}
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}
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// RemovableIfNotTargeted
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func (n *NodeModuleRemoved) RemoveIfNotTargeted() bool {
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// We need to add this so that this node will be removed if
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// it isn't targeted or a dependency of a target.
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return true
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}
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// EvalCheckModuleRemoved is an EvalNode implementation that verifies that
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// a module has been removed from the state as expected.
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type EvalCheckModuleRemoved struct {
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Addr addrs.ModuleInstance
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}
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func (n *EvalCheckModuleRemoved) Eval(ctx EvalContext) (interface{}, error) {
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mod := ctx.State().Module(n.Addr)
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if mod != nil {
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// If we get here then that indicates a bug either in the states
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// module or in an earlier step of the graph walk, since we should've
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// pruned out the module when the last resource was removed from it.
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return nil, fmt.Errorf("leftover module %s in state that should have been removed; this is a bug in Terraform and should be reported", n.Addr)
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}
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return nil, nil
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}
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