Function realMain

main.go:41–126

realMain is executed from main and returns the exit status to exit with.

()

// realMain is executed from main and returns the exit status to exit with.
func realMain() int {
	var wrapConfig panicwrap.WrapConfig
	// When following env variable is set, packer
	// won't panic wrap itself as it's already wrapped.
	// i.e.: when terraform runs it.
	wrapConfig.CookieKey = "PACKER_WRAP_COOKIE"
	wrapConfig.CookieValue = "49C22B1A-3A93-4C98-97FA-E07D18C787B5"

	if inPlugin() || panicwrap.Wrapped(&wrapConfig) {
		// Call the real main
		return wrappedMain()
	}

	// Generate a UUID for this packer run and pass it to the environment.
	// GenerateUUID always returns a nil error (based on rand.Read) so we'll
	// just ignore it.
	UUID, _ := uuid.GenerateUUID()
	os.Setenv("PACKER_RUN_UUID", UUID)

	// Determine where logs should go in general (requested by the user)
	logWriter, err := logOutput()
	if err != nil {
		fmt.Fprintf(os.Stderr, "Couldn't setup log output: %s", err)
		return 1
	}
	if logWriter == nil {
		logWriter = io.Discard
	}

	packersdk.LogSecretFilter.SetOutput(logWriter)

	// Disable logging here
	log.SetOutput(io.Discard)

	// We always send logs to a temporary file that we use in case
	// there is a panic. Otherwise, we delete it.
	logTempFile, err := tmp.File("packer-log")
	if err != nil {
		fmt.Fprintf(os.Stderr, "Couldn't setup logging tempfile: %s", err)
		return 1
	}
	defer os.Remove(logTempFile.Name())
	defer logTempFile.Close()

	// Setup the prefixed readers that send data properly to
	// stdout/stderr.
	doneCh := make(chan struct{})
	outR, outW := io.Pipe()
	go copyOutput(outR, doneCh)

	// Enable checkpoint for panic reporting
	if config, _ := loadConfig(); config != nil && !config.DisableCheckpoint {
		packer.CheckpointReporter = packer.NewCheckpointReporter(
			config.DisableCheckpointSignature,
		)
	}

	// Create the configuration for panicwrap and wrap our executable