fix attest reader when no TTY present

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

cmd/syft/internal/clio_setup_config.go

@@ -5,8 +5,10 @@ import (
 	"os"
 
 	"github.com/anchore/clio"
+	"github.com/anchore/go-logger"
+	gologgerredact "github.com/anchore/go-logger/adapter/redact"
 	"github.com/anchore/stereoscope"
-	ui2 "github.com/anchore/syft/cmd/syft/cli/ui"
+	handlers "github.com/anchore/syft/cmd/syft/cli/ui"
 	"github.com/anchore/syft/cmd/syft/internal/ui"
 	"github.com/anchore/syft/internal/bus"
 	"github.com/anchore/syft/internal/log"
@@ -18,6 +20,17 @@ func AppClioSetupConfig(id clio.Identification, out io.Writer) *clio.SetupConfig
 		WithGlobalConfigFlag().   // add persistent -c <path> for reading an application config from
 		WithGlobalLoggingFlags(). // add persistent -v and -q flags tied to the logging config
 		WithConfigInRootHelp().   // --help on the root command renders the full application config in the help text
+		WithLoggerConstructor(
+			func(cfg clio.Config, store gologgerredact.Store) (logger.Logger, error) {
+				if !cfg.Log.AllowUI(os.Stdin) && !cfg.Log.Quiet {
+					// this is a special case where the user has not explicitly disabled the UI, but the UI is not allowed
+					// due to the lack of a tty. In this case, we should default to info level.
+					cfg.Log.Level = logger.InfoLevel
+					cfg.Log.Verbosity = 1
+				}
+				return clio.DefaultLogger(cfg, store)
+			},
+		).
 		WithUIConstructor(
 			// select a UI based on the logging configuration and state of stdin (if stdin is a tty)
 			func(cfg clio.Config) ([]clio.UI, error) {
@@ -28,7 +41,7 @@ func AppClioSetupConfig(id clio.Identification, out io.Writer) *clio.SetupConfig
 
 				return []clio.UI{
 					ui.New(out, cfg.Log.Quiet,
-						ui2.New(ui2.DefaultHandlerConfig()),
+						handlers.New(handlers.DefaultHandlerConfig()),
 					),
 					noUI,
 				}, nil

cmd/syft/internal/ui/no_ui.go

@@ -1,13 +1,17 @@
 package ui
 
 import (
+	"bufio"
 	"io"
 	"os"
+	"sync"
 
 	"github.com/wagoodman/go-partybus"
 
 	"github.com/anchore/clio"
+	"github.com/anchore/syft/internal/log"
 	"github.com/anchore/syft/syft/event"
+	syftEventParsers "github.com/anchore/syft/syft/event/parsers"
 )
 
 var _ clio.UI = (*NoUI)(nil)
@@ -18,6 +22,7 @@ type NoUI struct {
 	finalizeEvents []partybus.Event
 	subscription   partybus.Unsubscribable
 	quiet          bool
+	wg             *sync.WaitGroup
 }
 
 func None(out io.Writer, quiet bool) *NoUI {
@@ -25,6 +30,7 @@ func None(out io.Writer, quiet bool) *NoUI {
 		out:   out,
 		err:   os.Stderr,
 		quiet: quiet,
+		wg:    &sync.WaitGroup{},
 	}
 }
 
@@ -38,10 +44,35 @@ func (n *NoUI) Handle(e partybus.Event) error {
 	case event.CLIReport, event.CLINotification:
 		// keep these for when the UI is terminated to show to the screen (or perform other events)
 		n.finalizeEvents = append(n.finalizeEvents, e)
+
+	case event.AttestationStarted:
+		n.handleAttestationStarted(e)
 	}
 	return nil
 }
 
-func (n NoUI) Teardown(_ bool) error {
+func (n NoUI) Teardown(force bool) error {
+	if !force {
+		n.wg.Wait()
+	}
 	return writeEvents(n.out, n.err, n.quiet, n.finalizeEvents...)
 }
+
+func (n *NoUI) handleAttestationStarted(e partybus.Event) {
+	n.wg.Add(1)
+	go func() {
+		defer n.wg.Done()
+		reader, _, _, err := syftEventParsers.ParseAttestationStartedEvent(e)
+		if err != nil {
+			log.WithFields("error", err).Warn("unable to parse event")
+			return
+		}
+
+		s := bufio.NewScanner(reader)
+
+		for s.Scan() {
+			text := s.Text()
+			log.Info("[COSIGN]", text)
+		}
+	}()
+}