83 lines
2.4 KiB
Go
83 lines
2.4 KiB
Go
package terraform
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import (
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"fmt"
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"github.com/hashicorp/terraform/plans"
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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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// evalReadDataApply is an EvalNode implementation that deals with the main part
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// of the data resource lifecycle: either actually reading from the data source
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// or generating a plan to do so.
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type evalReadDataApply struct {
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evalReadData
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}
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func (n *evalReadDataApply) Eval(ctx EvalContext) (interface{}, error) {
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absAddr := n.Addr.Absolute(ctx.Path())
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var diags tfdiags.Diagnostics
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var planned *plans.ResourceInstanceChange
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if n.Planned != nil {
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planned = *n.Planned
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}
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if n.ProviderSchema == nil || *n.ProviderSchema == nil {
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return nil, fmt.Errorf("provider schema not available for %s", n.Addr)
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}
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if planned != nil && planned.Action != plans.Read {
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// If any other action gets in here then that's always a bug; this
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// EvalNode only deals with reading.
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return nil, fmt.Errorf(
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"invalid action %s for %s: only Read is supported (this is a bug in Terraform; please report it!)",
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planned.Action, absAddr,
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)
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}
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if err := ctx.Hook(func(h Hook) (HookAction, error) {
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return h.PreApply(absAddr, states.CurrentGen, planned.Action, planned.Before, planned.After)
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}); err != nil {
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return nil, err
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}
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config := *n.Config
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providerSchema := *n.ProviderSchema
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schema, _ := 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 %q does not support data source %q", n.ProviderAddr.Provider.String(), n.Addr.Resource.Type)
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}
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forEach, _ := evaluateForEachExpression(config.ForEach, ctx)
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keyData := EvalDataForInstanceKey(n.Addr.Key, forEach)
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configVal, _, configDiags := ctx.EvaluateBlock(config.Config, schema, nil, keyData)
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diags = diags.Append(configDiags)
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if configDiags.HasErrors() {
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return nil, diags.ErrWithWarnings()
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}
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newVal, readDiags := n.readDataSource(ctx, configVal)
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diags = diags.Append(readDiags)
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if diags.HasErrors() {
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return nil, diags.ErrWithWarnings()
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}
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*n.State = &states.ResourceInstanceObject{
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Value: newVal,
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Status: states.ObjectReady,
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}
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if err := ctx.Hook(func(h Hook) (HookAction, error) {
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return h.PostApply(absAddr, states.CurrentGen, newVal, diags.Err())
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}); err != nil {
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diags = diags.Append(err)
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}
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return nil, diags.ErrWithWarnings()
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}
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