vendor: initial vendor

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/containerd/containerd/leases/context.go

@@ -0,0 +1,40 @@
+/*
+   Copyright The containerd Authors.
+
+   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 leases
+
+import "context"
+
+type leaseKey struct{}
+
+// WithLease sets a given lease on the context
+func WithLease(ctx context.Context, lid string) context.Context {
+	ctx = context.WithValue(ctx, leaseKey{}, lid)
+
+	// also store on the grpc headers so it gets picked up by any clients that
+	// are using this.
+	return withGRPCLeaseHeader(ctx, lid)
+}
+
+// FromContext returns the lease from the context.
+func FromContext(ctx context.Context) (string, bool) {
+	lid, ok := ctx.Value(leaseKey{}).(string)
+	if !ok {
+		return fromGRPCHeader(ctx)
+	}
+
+	return lid, ok
+}