Update gomod and vendor

vendor/github.com/moby/buildkit/util/progress/logs/logs.go

@@ -0,0 +1,53 @@
+package logs
+
+import (
+	"context"
+	"io"
+	"os"
+
+	"github.com/moby/buildkit/client"
+	"github.com/moby/buildkit/identity"
+	"github.com/moby/buildkit/util/progress"
+	"github.com/pkg/errors"
+)
+
+func NewLogStreams(ctx context.Context, printOutput bool) (io.WriteCloser, io.WriteCloser) {
+	return newStreamWriter(ctx, 1, printOutput), newStreamWriter(ctx, 2, printOutput)
+}
+
+func newStreamWriter(ctx context.Context, stream int, printOutput bool) io.WriteCloser {
+	pw, _, _ := progress.FromContext(ctx)
+	return &streamWriter{
+		pw:          pw,
+		stream:      stream,
+		printOutput: printOutput,
+	}
+}
+
+type streamWriter struct {
+	pw          progress.Writer
+	stream      int
+	printOutput bool
+}
+
+func (sw *streamWriter) Write(dt []byte) (int, error) {
+	sw.pw.Write(identity.NewID(), client.VertexLog{
+		Stream: sw.stream,
+		Data:   append([]byte{}, dt...),
+	})
+	if sw.printOutput {
+		switch sw.stream {
+		case 1:
+			return os.Stdout.Write(dt)
+		case 2:
+			return os.Stderr.Write(dt)
+		default:
+			return 0, errors.Errorf("invalid stream %d", sw.stream)
+		}
+	}
+	return len(dt), nil
+}
+
+func (sw *streamWriter) Close() error {
+	return sw.pw.Close()
+}