// Copyright 2016-2023, Pulumi Corporation. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package backend import ( "context" "os" "os/signal" "github.com/pulumi/pulumi/pkg/v3/engine" "github.com/pulumi/pulumi/pkg/v3/util/cancel" "github.com/pulumi/pulumi/sdk/v3/go/common/diag/colors" ) type cancellationScope struct { context *cancel.Context sigint chan os.Signal done chan bool } func (s *cancellationScope) Context() *cancel.Context { return s.context } func (s *cancellationScope) Close() { signal.Stop(s.sigint) close(s.sigint) <-s.done } type cancellationScopeSource int var CancellationScopes = CancellationScopeSource(cancellationScopeSource(0)) func (cancellationScopeSource) NewScope(events chan<- engine.Event, isPreview bool) CancellationScope { cancelContext, cancelSource := cancel.NewContext(context.Background()) c := &cancellationScope{ context: cancelContext, sigint: make(chan os.Signal), done: make(chan bool), } go func() { for range c.sigint { // If we haven't yet received a SIGINT, call the cancellation func. Otherwise call the termination // func. if cancelContext.CancelErr() == nil { message := "^C received; cancelling. If you would like to terminate immediately, press ^C again.\n" if !isPreview { message += colors.BrightRed + "Note that terminating immediately may lead to orphaned resources " + "and other inconsistencies.\n" + colors.Reset } engine.NewEvent(engine.StdoutEventPayload{ Message: message, Color: colors.Always, }) cancelSource.Cancel() } else { message := colors.BrightRed + "^C received; terminating" + colors.Reset engine.NewEvent(engine.StdoutEventPayload{ Message: message, Color: colors.Always, }) cancelSource.Terminate() } } close(c.done) }() signal.Notify(c.sigint, os.Interrupt) return c }