update vendor

Signed-off-by: Roland.Ma <rolandma@yunify.com>

vendor/github.com/deislabs/oras/pkg/context/context.go

@@ -0,0 +1,9 @@
+package context
+
+import "context"
+
+// Background returns a default context with logger discarded.
+func Background() context.Context {
+	ctx := context.Background()
+	return WithLoggerDiscarded(ctx)
+}

vendor/github.com/deislabs/oras/pkg/context/logger.go

@@ -0,0 +1,35 @@
+package context
+
+import (
+	"context"
+	"io"
+	"io/ioutil"
+
+	"github.com/containerd/containerd/log"
+	"github.com/sirupsen/logrus"
+)
+
+// WithLogger returns a new context with the provided logger.
+// This method wraps github.com/containerd/containerd/log.WithLogger()
+func WithLogger(ctx context.Context, logger *logrus.Entry) context.Context {
+	return log.WithLogger(ctx, logger)
+}
+
+// WithLoggerFromWriter returns a new context with the logger, writting to the provided logger.
+func WithLoggerFromWriter(ctx context.Context, writer io.Writer) context.Context {
+	logger := logrus.New()
+	logger.Out = writer
+	entry := logrus.NewEntry(logger)
+	return WithLogger(ctx, entry)
+}
+
+// WithLoggerDiscarded returns a new context with the logger, writting to nothing.
+func WithLoggerDiscarded(ctx context.Context) context.Context {
+	return WithLoggerFromWriter(ctx, ioutil.Discard)
+}
+
+// GetLogger retrieves the current logger from the context.
+// This method wraps github.com/containerd/containerd/log.GetLogger()
+func GetLogger(ctx context.Context) *logrus.Entry {
+	return log.GetLogger(ctx)
+}