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5e16e8eece
Refresh should load any new dependencies found because of configuration or state changes, but retain any dependencies already in the state. Orphaned resources would not be in config, but we do not want to lose the destroy ordering for the later apply.
108 lines
2.9 KiB
Go
108 lines
2.9 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/zclconf/go-cty/cty"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/providers"
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"github.com/hashicorp/terraform/states"
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"github.com/hashicorp/terraform/tfdiags"
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)
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// EvalRefresh is an EvalNode implementation that does a refresh for
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// a resource.
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type EvalRefresh struct {
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Addr addrs.ResourceInstance
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ProviderAddr addrs.AbsProviderConfig
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Provider *providers.Interface
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ProviderSchema **ProviderSchema
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State **states.ResourceInstanceObject
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Output **states.ResourceInstanceObject
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}
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// TODO: test
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func (n *EvalRefresh) Eval(ctx EvalContext) (interface{}, error) {
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state := *n.State
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absAddr := n.Addr.Absolute(ctx.Path())
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var diags tfdiags.Diagnostics
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// If we have no state, we don't do any refreshing
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if state == nil {
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log.Printf("[DEBUG] refresh: %s: no state, so not refreshing", n.Addr.Absolute(ctx.Path()))
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return nil, diags.ErrWithWarnings()
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}
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schema, _ := (*n.ProviderSchema).SchemaForResourceAddr(n.Addr.ContainingResource())
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if schema == nil {
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// Should be caught during validation, so we don't bother with a pretty error here
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return nil, fmt.Errorf("provider does not support resource type %q", n.Addr.Resource.Type)
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}
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// Call pre-refresh hook
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err := ctx.Hook(func(h Hook) (HookAction, error) {
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return h.PreRefresh(absAddr, states.CurrentGen, state.Value)
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})
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if err != nil {
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return nil, diags.ErrWithWarnings()
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}
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// Refresh!
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priorVal := state.Value
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req := providers.ReadResourceRequest{
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TypeName: n.Addr.Resource.Type,
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PriorState: priorVal,
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Private: state.Private,
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}
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provider := *n.Provider
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resp := provider.ReadResource(req)
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diags = diags.Append(resp.Diagnostics)
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if diags.HasErrors() {
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return nil, diags.Err()
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}
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if resp.NewState == cty.NilVal {
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// This ought not to happen in real cases since it's not possible to
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// send NilVal over the plugin RPC channel, but it can come up in
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// tests due to sloppy mocking.
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panic("new state is cty.NilVal")
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}
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for _, err := range resp.NewState.Type().TestConformance(schema.ImpliedType()) {
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diags = diags.Append(tfdiags.Sourceless(
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tfdiags.Error,
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"Provider produced invalid object",
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fmt.Sprintf(
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"Provider %q planned an invalid value for %s during refresh: %s.\n\nThis is a bug in the provider, which should be reported in the provider's own issue tracker.",
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n.ProviderAddr.ProviderConfig.Type, absAddr, tfdiags.FormatError(err),
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),
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))
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}
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if diags.HasErrors() {
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return nil, diags.Err()
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}
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newState := state.DeepCopy()
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newState.Value = resp.NewState
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newState.Private = resp.Private
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newState.Dependencies = state.Dependencies
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// Call post-refresh hook
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err = ctx.Hook(func(h Hook) (HookAction, error) {
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return h.PostRefresh(absAddr, states.CurrentGen, priorVal, newState.Value)
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})
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if err != nil {
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return nil, err
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}
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if n.Output != nil {
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*n.Output = newState
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}
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return nil, diags.ErrWithWarnings()
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}
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