package local import ( "context" "fmt" "log" "os" "strings" "github.com/hashicorp/errwrap" "github.com/hashicorp/terraform/backend" "github.com/hashicorp/terraform/terraform" "github.com/hashicorp/terraform/tfdiags" ) func (b *Local) opRefresh( stopCtx context.Context, cancelCtx context.Context, op *backend.Operation, runningOp *backend.RunningOperation) { var diags tfdiags.Diagnostics // Check if our state exists if we're performing a refresh operation. We // only do this if we're managing state with this backend. if b.Backend == nil { if _, err := os.Stat(b.StatePath); err != nil { if os.IsNotExist(err) { err = nil } if err != nil { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Cannot read state file", fmt.Sprintf("Failed to read %s: %s", b.StatePath, err), )) b.ReportResult(runningOp, diags) return } } } // Get our context tfCtx, opState, contextDiags := b.context(op) diags = diags.Append(contextDiags) if contextDiags.HasErrors() { b.ReportResult(runningOp, diags) return } // Set our state runningOp.State = opState.State() if runningOp.State.Empty() || !runningOp.State.HasResources() { if b.CLI != nil { b.CLI.Output(b.Colorize().Color( strings.TrimSpace(refreshNoState) + "\n")) } } // Perform the refresh in a goroutine so we can be interrupted var newState *terraform.State var refreshErr error doneCh := make(chan struct{}) go func() { defer close(doneCh) newState, refreshErr = tfCtx.Refresh() log.Printf("[INFO] backend/local: refresh calling Refresh") }() if b.opWait(doneCh, stopCtx, cancelCtx, tfCtx, opState) { return } // write the resulting state to the running op runningOp.State = newState if refreshErr != nil { diags = diags.Append(refreshErr) b.ReportResult(runningOp, diags) return } // Write and persist the state if err := opState.WriteState(newState); err != nil { diags = diags.Append(errwrap.Wrapf("Failed to write state: {{err}}", err)) b.ReportResult(runningOp, diags) return } if err := opState.PersistState(); err != nil { diags = diags.Append(errwrap.Wrapf("Failed to save state: {{err}}", err)) b.ReportResult(runningOp, diags) return } } const refreshNoState = ` [reset][bold][yellow]Empty or non-existent state file.[reset][yellow] Refresh will do nothing. Refresh does not error or return an erroneous exit status because many automation scripts use refresh, plan, then apply and may not have a state file yet for the first run. `