105 lines
2.8 KiB
Go
105 lines
2.8 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).ResourceTypes[n.Addr.Resource.Type]
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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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}
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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 schema.ImpliedType().TestConformance(resp.NewState.Type()) {
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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: %s during refresh.\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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// 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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