package local import ( "context" "fmt" "log" "github.com/hashicorp/terraform/backend" "github.com/hashicorp/terraform/plans" "github.com/hashicorp/terraform/plans/planfile" "github.com/hashicorp/terraform/states/statefile" "github.com/hashicorp/terraform/states/statemgr" "github.com/hashicorp/terraform/terraform" "github.com/hashicorp/terraform/tfdiags" ) func (b *Local) opPlan( stopCtx context.Context, cancelCtx context.Context, op *backend.Operation, runningOp *backend.RunningOperation) { log.Printf("[INFO] backend/local: starting Plan operation") var diags tfdiags.Diagnostics if op.PlanFile != nil { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Can't re-plan a saved plan", "The plan command was given a saved plan file as its input. This command generates "+ "a new plan, and so it requires a configuration directory as its argument.", )) op.ReportResult(runningOp, diags) return } // Local planning requires a config, unless we're planning to destroy. if op.PlanMode != plans.DestroyMode && !op.HasConfig() { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "No configuration files", "Plan requires configuration to be present. Planning without a configuration would "+ "mark everything for destruction, which is normally not what is desired. If you "+ "would like to destroy everything, run plan with the -destroy option. Otherwise, "+ "create a Terraform configuration file (.tf file) and try again.", )) op.ReportResult(runningOp, diags) return } if b.ContextOpts == nil { b.ContextOpts = new(terraform.ContextOpts) } // Get our context tfCtx, configSnap, opState, ctxDiags := b.context(op) diags = diags.Append(ctxDiags) if ctxDiags.HasErrors() { op.ReportResult(runningOp, diags) return } // the state was locked during succesfull context creation; unlock the state // when the operation completes defer func() { diags := op.StateLocker.Unlock() if diags.HasErrors() { op.View.Diagnostics(diags) runningOp.Result = backend.OperationFailure } }() runningOp.State = tfCtx.State() // Perform the plan in a goroutine so we can be interrupted var plan *plans.Plan var planDiags tfdiags.Diagnostics doneCh := make(chan struct{}) go func() { defer close(doneCh) log.Printf("[INFO] backend/local: plan calling Plan") plan, planDiags = tfCtx.Plan() }() if b.opWait(doneCh, stopCtx, cancelCtx, tfCtx, opState, op.View) { // If we get in here then the operation was cancelled, which is always // considered to be a failure. log.Printf("[INFO] backend/local: plan operation was force-cancelled by interrupt") runningOp.Result = backend.OperationFailure return } log.Printf("[INFO] backend/local: plan operation completed") diags = diags.Append(planDiags) if planDiags.HasErrors() { op.ReportResult(runningOp, diags) return } // Record whether this plan includes any side-effects that could be applied. runningOp.PlanEmpty = plan.Changes.Empty() // Save the plan to disk if path := op.PlanOutPath; path != "" { if op.PlanOutBackend == nil { // This is always a bug in the operation caller; it's not valid // to set PlanOutPath without also setting PlanOutBackend. diags = diags.Append(fmt.Errorf( "PlanOutPath set without also setting PlanOutBackend (this is a bug in Terraform)"), ) op.ReportResult(runningOp, diags) return } plan.Backend = *op.PlanOutBackend // We may have updated the state in the refresh step above, but we // will freeze that updated state in the plan file for now and // only write it if this plan is subsequently applied. plannedStateFile := statemgr.PlannedStateUpdate(opState, plan.PriorState) // We also include a file containing the state as it existed before // we took any action at all, but this one isn't intended to ever // be saved to the backend (an equivalent snapshot should already be // there) and so we just use a stub state file header in this case. // NOTE: This won't be exactly identical to the latest state snapshot // in the backend because it's still been subject to state upgrading // to make it consumable by the current Terraform version, and // intentionally doesn't preserve the header info. prevStateFile := &statefile.File{ State: plan.PrevRunState, } log.Printf("[INFO] backend/local: writing plan output to: %s", path) err := planfile.Create(path, configSnap, prevStateFile, plannedStateFile, plan) if err != nil { diags = diags.Append(tfdiags.Sourceless( tfdiags.Error, "Failed to write plan file", fmt.Sprintf("The plan file could not be written: %s.", err), )) op.ReportResult(runningOp, diags) return } } // Perform some output tasks if runningOp.PlanEmpty { op.View.PlanNoChanges() // Even if there are no changes, there still could be some warnings op.View.Diagnostics(diags) return } // Render the plan op.View.Plan(plan, tfCtx.Schemas()) // If we've accumulated any warnings along the way then we'll show them // here just before we show the summary and next steps. If we encountered // errors then we would've returned early at some other point above. op.View.Diagnostics(diags) op.View.PlanNextStep(op.PlanOutPath) }