Vendor dependencies for GCS

vendor/cloud.google.com/go/pubsub/apiv1/ListTopics_smoke_test.go

@@ -0,0 +1,65 @@
+// Copyright 2017, Google Inc. All rights reserved.
+//
+// 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.
+
+// AUTO-GENERATED CODE. DO NOT EDIT.
+
+package pubsub
+
+import (
+	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
+)
+
+import (
+	"strconv"
+	"testing"
+	"time"
+
+	"cloud.google.com/go/internal/testutil"
+	"golang.org/x/net/context"
+	"google.golang.org/api/iterator"
+	"google.golang.org/api/option"
+)
+
+var _ = iterator.Done
+var _ = strconv.FormatUint
+var _ = time.Now
+
+func TestPublisherSmoke(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping smoke test in short mode")
+	}
+	ctx := context.Background()
+	ts := testutil.TokenSource(ctx, DefaultAuthScopes()...)
+	if ts == nil {
+		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
+	}
+
+	projectId := testutil.ProjID()
+	_ = projectId
+
+	c, err := NewPublisherClient(ctx, option.WithTokenSource(ts))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var formattedProject string = PublisherProjectPath(projectId)
+	var request = &pubsubpb.ListTopicsRequest{
+		Project: formattedProject,
+	}
+
+	iter := c.ListTopics(ctx, request)
+	if _, err := iter.Next(); err != nil && err != iterator.Done {
+		t.Error(err)
+	}
+}

vendor/cloud.google.com/go/pubsub/apiv1/README.md

@@ -0,0 +1,9 @@
+Auto-generated pubsub v1 clients
+=================================
+
+This package includes auto-generated clients for the pubsub v1 API.
+
+Use the handwritten client (in the parent directory,
+cloud.google.com/go/pubsub) in preference to this.
+
+This code is EXPERIMENTAL and subject to CHANGE AT ANY TIME.

vendor/cloud.google.com/go/pubsub/apiv1/doc.go

@@ -0,0 +1,45 @@
+// Copyright 2017, Google Inc. All rights reserved.
+//
+// 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.
+
+// AUTO-GENERATED CODE. DO NOT EDIT.
+
+// Package pubsub is an experimental, auto-generated package for the
+// Google Cloud Pub/Sub API.
+//
+// Provides reliable, many-to-many, asynchronous messaging between
+// applications.
+//
+// Use the client at cloud.google.com/go/pubsub in preference to this.
+package pubsub // import "cloud.google.com/go/pubsub/apiv1"
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/metadata"
+)
+
+func insertXGoog(ctx context.Context, val []string) context.Context {
+	md, _ := metadata.FromOutgoingContext(ctx)
+	md = md.Copy()
+	md["x-goog-api-client"] = val
+	return metadata.NewOutgoingContext(ctx, md)
+}
+
+// DefaultAuthScopes reports the authentication scopes required
+// by this package.
+func DefaultAuthScopes() []string {
+	return []string{
+		"https://www.googleapis.com/auth/cloud-platform",
+		"https://www.googleapis.com/auth/pubsub",
+	}
+}

vendor/cloud.google.com/go/pubsub/apiv1/publisher_client.go

@@ -0,0 +1,402 @@
+// Copyright 2017, Google Inc. All rights reserved.
+//
+// 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.
+
+// AUTO-GENERATED CODE. DO NOT EDIT.
+
+package pubsub
+
+import (
+	"math"
+	"time"
+
+	"cloud.google.com/go/iam"
+	"cloud.google.com/go/internal/version"
+	gax "github.com/googleapis/gax-go"
+	"golang.org/x/net/context"
+	"google.golang.org/api/iterator"
+	"google.golang.org/api/option"
+	"google.golang.org/api/transport"
+	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+)
+
+var (
+	publisherProjectPathTemplate = gax.MustCompilePathTemplate("projects/{project}")
+	publisherTopicPathTemplate   = gax.MustCompilePathTemplate("projects/{project}/topics/{topic}")
+)
+
+// PublisherCallOptions contains the retry settings for each method of PublisherClient.
+type PublisherCallOptions struct {
+	CreateTopic            []gax.CallOption
+	Publish                []gax.CallOption
+	GetTopic               []gax.CallOption
+	ListTopics             []gax.CallOption
+	ListTopicSubscriptions []gax.CallOption
+	DeleteTopic            []gax.CallOption
+}
+
+func defaultPublisherClientOptions() []option.ClientOption {
+	return []option.ClientOption{
+		option.WithEndpoint("pubsub.googleapis.com:443"),
+		option.WithScopes(DefaultAuthScopes()...),
+	}
+}
+
+func defaultPublisherCallOptions() *PublisherCallOptions {
+	retry := map[[2]string][]gax.CallOption{
+		{"default", "idempotent"}: {
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.3,
+				})
+			}),
+		},
+		{"messaging", "one_plus_delivery"}: {
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.Canceled,
+					codes.Unknown,
+					codes.DeadlineExceeded,
+					codes.ResourceExhausted,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unavailable,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.3,
+				})
+			}),
+		},
+	}
+	return &PublisherCallOptions{
+		CreateTopic:            retry[[2]string{"default", "idempotent"}],
+		Publish:                retry[[2]string{"messaging", "one_plus_delivery"}],
+		GetTopic:               retry[[2]string{"default", "idempotent"}],
+		ListTopics:             retry[[2]string{"default", "idempotent"}],
+		ListTopicSubscriptions: retry[[2]string{"default", "idempotent"}],
+		DeleteTopic:            retry[[2]string{"default", "idempotent"}],
+	}
+}
+
+// PublisherClient is a client for interacting with Google Cloud Pub/Sub API.
+type PublisherClient struct {
+	// The connection to the service.
+	conn *grpc.ClientConn
+
+	// The gRPC API client.
+	publisherClient pubsubpb.PublisherClient
+
+	// The call options for this service.
+	CallOptions *PublisherCallOptions
+
+	// The metadata to be sent with each request.
+	xGoogHeader []string
+}
+
+// NewPublisherClient creates a new publisher client.
+//
+// The service that an application uses to manipulate topics, and to send
+// messages to a topic.
+func NewPublisherClient(ctx context.Context, opts ...option.ClientOption) (*PublisherClient, error) {
+	conn, err := transport.DialGRPC(ctx, append(defaultPublisherClientOptions(), opts...)...)
+	if err != nil {
+		return nil, err
+	}
+	c := &PublisherClient{
+		conn:        conn,
+		CallOptions: defaultPublisherCallOptions(),
+
+		publisherClient: pubsubpb.NewPublisherClient(conn),
+	}
+	c.SetGoogleClientInfo()
+	return c, nil
+}
+
+// Connection returns the client's connection to the API service.
+func (c *PublisherClient) Connection() *grpc.ClientConn {
+	return c.conn
+}
+
+// Close closes the connection to the API service. The user should invoke this when
+// the client is no longer required.
+func (c *PublisherClient) Close() error {
+	return c.conn.Close()
+}
+
+// SetGoogleClientInfo sets the name and version of the application in
+// the `x-goog-api-client` header passed on each request. Intended for
+// use by Google-written clients.
+func (c *PublisherClient) SetGoogleClientInfo(keyval ...string) {
+	kv := append([]string{"gl-go", version.Go()}, keyval...)
+	kv = append(kv, "gapic", version.Repo, "gax", gax.Version, "grpc", grpc.Version)
+	c.xGoogHeader = []string{gax.XGoogHeader(kv...)}
+}
+
+// PublisherProjectPath returns the path for the project resource.
+func PublisherProjectPath(project string) string {
+	path, err := publisherProjectPathTemplate.Render(map[string]string{
+		"project": project,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return path
+}
+
+// PublisherTopicPath returns the path for the topic resource.
+func PublisherTopicPath(project, topic string) string {
+	path, err := publisherTopicPathTemplate.Render(map[string]string{
+		"project": project,
+		"topic":   topic,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return path
+}
+
+func (c *PublisherClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle {
+	return iam.InternalNewHandle(c.Connection(), subscription.Name)
+}
+
+func (c *PublisherClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle {
+	return iam.InternalNewHandle(c.Connection(), topic.Name)
+}
+
+// CreateTopic creates the given topic with the given name.
+func (c *PublisherClient) CreateTopic(ctx context.Context, req *pubsubpb.Topic, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.CreateTopic[0:len(c.CallOptions.CreateTopic):len(c.CallOptions.CreateTopic)], opts...)
+	var resp *pubsubpb.Topic
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.publisherClient.CreateTopic(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// Publish adds one or more messages to the topic. Returns `NOT_FOUND` if the topic
+// does not exist. The message payload must not be empty; it must contain
+//  either a non-empty data field, or at least one attribute.
+func (c *PublisherClient) Publish(ctx context.Context, req *pubsubpb.PublishRequest, opts ...gax.CallOption) (*pubsubpb.PublishResponse, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.Publish[0:len(c.CallOptions.Publish):len(c.CallOptions.Publish)], opts...)
+	var resp *pubsubpb.PublishResponse
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.publisherClient.Publish(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// GetTopic gets the configuration of a topic.
+func (c *PublisherClient) GetTopic(ctx context.Context, req *pubsubpb.GetTopicRequest, opts ...gax.CallOption) (*pubsubpb.Topic, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.GetTopic[0:len(c.CallOptions.GetTopic):len(c.CallOptions.GetTopic)], opts...)
+	var resp *pubsubpb.Topic
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.publisherClient.GetTopic(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// ListTopics lists matching topics.
+func (c *PublisherClient) ListTopics(ctx context.Context, req *pubsubpb.ListTopicsRequest, opts ...gax.CallOption) *TopicIterator {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.ListTopics[0:len(c.CallOptions.ListTopics):len(c.CallOptions.ListTopics)], opts...)
+	it := &TopicIterator{}
+	it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Topic, string, error) {
+		var resp *pubsubpb.ListTopicsResponse
+		req.PageToken = pageToken
+		if pageSize > math.MaxInt32 {
+			req.PageSize = math.MaxInt32
+		} else {
+			req.PageSize = int32(pageSize)
+		}
+		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+			var err error
+			resp, err = c.publisherClient.ListTopics(ctx, req, settings.GRPC...)
+			return err
+		}, opts...)
+		if err != nil {
+			return nil, "", err
+		}
+		return resp.Topics, resp.NextPageToken, nil
+	}
+	fetch := func(pageSize int, pageToken string) (string, error) {
+		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
+		if err != nil {
+			return "", err
+		}
+		it.items = append(it.items, items...)
+		return nextPageToken, nil
+	}
+	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
+	return it
+}
+
+// ListTopicSubscriptions lists the name of the subscriptions for this topic.
+func (c *PublisherClient) ListTopicSubscriptions(ctx context.Context, req *pubsubpb.ListTopicSubscriptionsRequest, opts ...gax.CallOption) *StringIterator {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.ListTopicSubscriptions[0:len(c.CallOptions.ListTopicSubscriptions):len(c.CallOptions.ListTopicSubscriptions)], opts...)
+	it := &StringIterator{}
+	it.InternalFetch = func(pageSize int, pageToken string) ([]string, string, error) {
+		var resp *pubsubpb.ListTopicSubscriptionsResponse
+		req.PageToken = pageToken
+		if pageSize > math.MaxInt32 {
+			req.PageSize = math.MaxInt32
+		} else {
+			req.PageSize = int32(pageSize)
+		}
+		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+			var err error
+			resp, err = c.publisherClient.ListTopicSubscriptions(ctx, req, settings.GRPC...)
+			return err
+		}, opts...)
+		if err != nil {
+			return nil, "", err
+		}
+		return resp.Subscriptions, resp.NextPageToken, nil
+	}
+	fetch := func(pageSize int, pageToken string) (string, error) {
+		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
+		if err != nil {
+			return "", err
+		}
+		it.items = append(it.items, items...)
+		return nextPageToken, nil
+	}
+	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
+	return it
+}
+
+// DeleteTopic deletes the topic with the given name. Returns `NOT_FOUND` if the topic
+// does not exist. After a topic is deleted, a new topic may be created with
+// the same name; this is an entirely new topic with none of the old
+// configuration or subscriptions. Existing subscriptions to this topic are
+// not deleted, but their `topic` field is set to `_deleted-topic_`.
+func (c *PublisherClient) DeleteTopic(ctx context.Context, req *pubsubpb.DeleteTopicRequest, opts ...gax.CallOption) error {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.DeleteTopic[0:len(c.CallOptions.DeleteTopic):len(c.CallOptions.DeleteTopic)], opts...)
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		_, err = c.publisherClient.DeleteTopic(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	return err
+}
+
+// StringIterator manages a stream of string.
+type StringIterator struct {
+	items    []string
+	pageInfo *iterator.PageInfo
+	nextFunc func() error
+
+	// InternalFetch is for use by the Google Cloud Libraries only.
+	// It is not part of the stable interface of this package.
+	//
+	// InternalFetch returns results from a single call to the underlying RPC.
+	// The number of results is no greater than pageSize.
+	// If there are no more results, nextPageToken is empty and err is nil.
+	InternalFetch func(pageSize int, pageToken string) (results []string, nextPageToken string, err error)
+}
+
+// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
+func (it *StringIterator) PageInfo() *iterator.PageInfo {
+	return it.pageInfo
+}
+
+// Next returns the next result. Its second return value is iterator.Done if there are no more
+// results. Once Next returns Done, all subsequent calls will return Done.
+func (it *StringIterator) Next() (string, error) {
+	var item string
+	if err := it.nextFunc(); err != nil {
+		return item, err
+	}
+	item = it.items[0]
+	it.items = it.items[1:]
+	return item, nil
+}
+
+func (it *StringIterator) bufLen() int {
+	return len(it.items)
+}
+
+func (it *StringIterator) takeBuf() interface{} {
+	b := it.items
+	it.items = nil
+	return b
+}
+
+// TopicIterator manages a stream of *pubsubpb.Topic.
+type TopicIterator struct {
+	items    []*pubsubpb.Topic
+	pageInfo *iterator.PageInfo
+	nextFunc func() error
+
+	// InternalFetch is for use by the Google Cloud Libraries only.
+	// It is not part of the stable interface of this package.
+	//
+	// InternalFetch returns results from a single call to the underlying RPC.
+	// The number of results is no greater than pageSize.
+	// If there are no more results, nextPageToken is empty and err is nil.
+	InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Topic, nextPageToken string, err error)
+}
+
+// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
+func (it *TopicIterator) PageInfo() *iterator.PageInfo {
+	return it.pageInfo
+}
+
+// Next returns the next result. Its second return value is iterator.Done if there are no more
+// results. Once Next returns Done, all subsequent calls will return Done.
+func (it *TopicIterator) Next() (*pubsubpb.Topic, error) {
+	var item *pubsubpb.Topic
+	if err := it.nextFunc(); err != nil {
+		return item, err
+	}
+	item = it.items[0]
+	it.items = it.items[1:]
+	return item, nil
+}
+
+func (it *TopicIterator) bufLen() int {
+	return len(it.items)
+}
+
+func (it *TopicIterator) takeBuf() interface{} {
+	b := it.items
+	it.items = nil
+	return b
+}

vendor/cloud.google.com/go/pubsub/apiv1/publisher_client_example_test.go

@@ -0,0 +1,186 @@
+// Copyright 2017, Google Inc. All rights reserved.
+//
+// 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.
+
+// AUTO-GENERATED CODE. DO NOT EDIT.
+
+package pubsub_test
+
+import (
+	"cloud.google.com/go/pubsub/apiv1"
+	"golang.org/x/net/context"
+	"google.golang.org/api/iterator"
+	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
+)
+
+func ExampleNewPublisherClient() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use client.
+	_ = c
+}
+
+func ExamplePublisherClient_SubscriptionIAM() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	subscription := &pubsubpb.Subscription{}
+	h := c.SubscriptionIAM(subscription)
+	policy, err := h.Policy(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	//TODO: Use the IAM policy
+	_ = policy
+}
+
+func ExamplePublisherClient_TopicIAM() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	topic := &pubsubpb.Topic{}
+	h := c.TopicIAM(topic)
+	policy, err := h.Policy(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	//TODO: Use the IAM policy
+	_ = policy
+}
+
+func ExamplePublisherClient_CreateTopic() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.Topic{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.CreateTopic(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExamplePublisherClient_Publish() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.PublishRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.Publish(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExamplePublisherClient_GetTopic() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.GetTopicRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.GetTopic(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExamplePublisherClient_ListTopics() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.ListTopicsRequest{
+	// TODO: Fill request struct fields.
+	}
+	it := c.ListTopics(ctx, req)
+	for {
+		resp, err := it.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			// TODO: Handle error.
+		}
+		// TODO: Use resp.
+		_ = resp
+	}
+}
+
+func ExamplePublisherClient_ListTopicSubscriptions() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.ListTopicSubscriptionsRequest{
+	// TODO: Fill request struct fields.
+	}
+	it := c.ListTopicSubscriptions(ctx, req)
+	for {
+		resp, err := it.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			// TODO: Handle error.
+		}
+		// TODO: Use resp.
+		_ = resp
+	}
+}
+
+func ExamplePublisherClient_DeleteTopic() {
+	ctx := context.Background()
+	c, err := pubsub.NewPublisherClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.DeleteTopicRequest{
+	// TODO: Fill request struct fields.
+	}
+	err = c.DeleteTopic(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+}

vendor/cloud.google.com/go/pubsub/apiv1/subscriber_client.go

@@ -0,0 +1,604 @@
+// Copyright 2017, Google Inc. All rights reserved.
+//
+// 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.
+
+// AUTO-GENERATED CODE. DO NOT EDIT.
+
+package pubsub
+
+import (
+	"math"
+	"time"
+
+	"cloud.google.com/go/iam"
+	"cloud.google.com/go/internal/version"
+	gax "github.com/googleapis/gax-go"
+	"golang.org/x/net/context"
+	"google.golang.org/api/iterator"
+	"google.golang.org/api/option"
+	"google.golang.org/api/transport"
+	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+)
+
+var (
+	subscriberProjectPathTemplate      = gax.MustCompilePathTemplate("projects/{project}")
+	subscriberSnapshotPathTemplate     = gax.MustCompilePathTemplate("projects/{project}/snapshots/{snapshot}")
+	subscriberSubscriptionPathTemplate = gax.MustCompilePathTemplate("projects/{project}/subscriptions/{subscription}")
+	subscriberTopicPathTemplate        = gax.MustCompilePathTemplate("projects/{project}/topics/{topic}")
+)
+
+// SubscriberCallOptions contains the retry settings for each method of SubscriberClient.
+type SubscriberCallOptions struct {
+	CreateSubscription []gax.CallOption
+	GetSubscription    []gax.CallOption
+	UpdateSubscription []gax.CallOption
+	ListSubscriptions  []gax.CallOption
+	DeleteSubscription []gax.CallOption
+	ModifyAckDeadline  []gax.CallOption
+	Acknowledge        []gax.CallOption
+	Pull               []gax.CallOption
+	StreamingPull      []gax.CallOption
+	ModifyPushConfig   []gax.CallOption
+	ListSnapshots      []gax.CallOption
+	CreateSnapshot     []gax.CallOption
+	DeleteSnapshot     []gax.CallOption
+	Seek               []gax.CallOption
+}
+
+func defaultSubscriberClientOptions() []option.ClientOption {
+	return []option.ClientOption{
+		option.WithEndpoint("pubsub.googleapis.com:443"),
+		option.WithScopes(DefaultAuthScopes()...),
+	}
+}
+
+func defaultSubscriberCallOptions() *SubscriberCallOptions {
+	retry := map[[2]string][]gax.CallOption{
+		{"default", "idempotent"}: {
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.3,
+				})
+			}),
+		},
+		{"messaging", "pull"}: {
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.Canceled,
+					codes.DeadlineExceeded,
+					codes.ResourceExhausted,
+					codes.Internal,
+					codes.Unavailable,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.3,
+				})
+			}),
+		},
+	}
+	return &SubscriberCallOptions{
+		CreateSubscription: retry[[2]string{"default", "idempotent"}],
+		GetSubscription:    retry[[2]string{"default", "idempotent"}],
+		UpdateSubscription: retry[[2]string{"default", "idempotent"}],
+		ListSubscriptions:  retry[[2]string{"default", "idempotent"}],
+		DeleteSubscription: retry[[2]string{"default", "idempotent"}],
+		ModifyAckDeadline:  retry[[2]string{"default", "non_idempotent"}],
+		Acknowledge:        retry[[2]string{"messaging", "non_idempotent"}],
+		Pull:               retry[[2]string{"messaging", "pull"}],
+		StreamingPull:      retry[[2]string{"messaging", "pull"}],
+		ModifyPushConfig:   retry[[2]string{"default", "non_idempotent"}],
+		ListSnapshots:      retry[[2]string{"default", "idempotent"}],
+		CreateSnapshot:     retry[[2]string{"default", "idempotent"}],
+		DeleteSnapshot:     retry[[2]string{"default", "idempotent"}],
+		Seek:               retry[[2]string{"default", "non_idempotent"}],
+	}
+}
+
+// SubscriberClient is a client for interacting with Google Cloud Pub/Sub API.
+type SubscriberClient struct {
+	// The connection to the service.
+	conn *grpc.ClientConn
+
+	// The gRPC API client.
+	subscriberClient pubsubpb.SubscriberClient
+
+	// The call options for this service.
+	CallOptions *SubscriberCallOptions
+
+	// The metadata to be sent with each request.
+	xGoogHeader []string
+}
+
+// NewSubscriberClient creates a new subscriber client.
+//
+// The service that an application uses to manipulate subscriptions and to
+// consume messages from a subscription via the `Pull` method.
+func NewSubscriberClient(ctx context.Context, opts ...option.ClientOption) (*SubscriberClient, error) {
+	conn, err := transport.DialGRPC(ctx, append(defaultSubscriberClientOptions(), opts...)...)
+	if err != nil {
+		return nil, err
+	}
+	c := &SubscriberClient{
+		conn:        conn,
+		CallOptions: defaultSubscriberCallOptions(),
+
+		subscriberClient: pubsubpb.NewSubscriberClient(conn),
+	}
+	c.SetGoogleClientInfo()
+	return c, nil
+}
+
+// Connection returns the client's connection to the API service.
+func (c *SubscriberClient) Connection() *grpc.ClientConn {
+	return c.conn
+}
+
+// Close closes the connection to the API service. The user should invoke this when
+// the client is no longer required.
+func (c *SubscriberClient) Close() error {
+	return c.conn.Close()
+}
+
+// SetGoogleClientInfo sets the name and version of the application in
+// the `x-goog-api-client` header passed on each request. Intended for
+// use by Google-written clients.
+func (c *SubscriberClient) SetGoogleClientInfo(keyval ...string) {
+	kv := append([]string{"gl-go", version.Go()}, keyval...)
+	kv = append(kv, "gapic", version.Repo, "gax", gax.Version, "grpc", grpc.Version)
+	c.xGoogHeader = []string{gax.XGoogHeader(kv...)}
+}
+
+// SubscriberProjectPath returns the path for the project resource.
+func SubscriberProjectPath(project string) string {
+	path, err := subscriberProjectPathTemplate.Render(map[string]string{
+		"project": project,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return path
+}
+
+// SubscriberSnapshotPath returns the path for the snapshot resource.
+func SubscriberSnapshotPath(project, snapshot string) string {
+	path, err := subscriberSnapshotPathTemplate.Render(map[string]string{
+		"project":  project,
+		"snapshot": snapshot,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return path
+}
+
+// SubscriberSubscriptionPath returns the path for the subscription resource.
+func SubscriberSubscriptionPath(project, subscription string) string {
+	path, err := subscriberSubscriptionPathTemplate.Render(map[string]string{
+		"project":      project,
+		"subscription": subscription,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return path
+}
+
+// SubscriberTopicPath returns the path for the topic resource.
+func SubscriberTopicPath(project, topic string) string {
+	path, err := subscriberTopicPathTemplate.Render(map[string]string{
+		"project": project,
+		"topic":   topic,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return path
+}
+
+func (c *SubscriberClient) SubscriptionIAM(subscription *pubsubpb.Subscription) *iam.Handle {
+	return iam.InternalNewHandle(c.Connection(), subscription.Name)
+}
+
+func (c *SubscriberClient) TopicIAM(topic *pubsubpb.Topic) *iam.Handle {
+	return iam.InternalNewHandle(c.Connection(), topic.Name)
+}
+
+// CreateSubscription creates a subscription to a given topic.
+// If the subscription already exists, returns `ALREADY_EXISTS`.
+// If the corresponding topic doesn't exist, returns `NOT_FOUND`.
+//
+// If the name is not provided in the request, the server will assign a random
+// name for this subscription on the same project as the topic, conforming
+// to the
+// [resource name format](https://cloud.google.com/pubsub/docs/overview#names).
+// The generated name is populated in the returned Subscription object.
+// Note that for REST API requests, you must specify a name in the request.
+func (c *SubscriberClient) CreateSubscription(ctx context.Context, req *pubsubpb.Subscription, opts ...gax.CallOption) (*pubsubpb.Subscription, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.CreateSubscription[0:len(c.CallOptions.CreateSubscription):len(c.CallOptions.CreateSubscription)], opts...)
+	var resp *pubsubpb.Subscription
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.CreateSubscription(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// GetSubscription gets the configuration details of a subscription.
+func (c *SubscriberClient) GetSubscription(ctx context.Context, req *pubsubpb.GetSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.GetSubscription[0:len(c.CallOptions.GetSubscription):len(c.CallOptions.GetSubscription)], opts...)
+	var resp *pubsubpb.Subscription
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.GetSubscription(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// UpdateSubscription updates an existing subscription. Note that certain properties of a
+// subscription, such as its topic, are not modifiable.
+func (c *SubscriberClient) UpdateSubscription(ctx context.Context, req *pubsubpb.UpdateSubscriptionRequest, opts ...gax.CallOption) (*pubsubpb.Subscription, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.UpdateSubscription[0:len(c.CallOptions.UpdateSubscription):len(c.CallOptions.UpdateSubscription)], opts...)
+	var resp *pubsubpb.Subscription
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.UpdateSubscription(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// ListSubscriptions lists matching subscriptions.
+func (c *SubscriberClient) ListSubscriptions(ctx context.Context, req *pubsubpb.ListSubscriptionsRequest, opts ...gax.CallOption) *SubscriptionIterator {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.ListSubscriptions[0:len(c.CallOptions.ListSubscriptions):len(c.CallOptions.ListSubscriptions)], opts...)
+	it := &SubscriptionIterator{}
+	it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Subscription, string, error) {
+		var resp *pubsubpb.ListSubscriptionsResponse
+		req.PageToken = pageToken
+		if pageSize > math.MaxInt32 {
+			req.PageSize = math.MaxInt32
+		} else {
+			req.PageSize = int32(pageSize)
+		}
+		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+			var err error
+			resp, err = c.subscriberClient.ListSubscriptions(ctx, req, settings.GRPC...)
+			return err
+		}, opts...)
+		if err != nil {
+			return nil, "", err
+		}
+		return resp.Subscriptions, resp.NextPageToken, nil
+	}
+	fetch := func(pageSize int, pageToken string) (string, error) {
+		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
+		if err != nil {
+			return "", err
+		}
+		it.items = append(it.items, items...)
+		return nextPageToken, nil
+	}
+	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
+	return it
+}
+
+// DeleteSubscription deletes an existing subscription. All messages retained in the subscription
+// are immediately dropped. Calls to `Pull` after deletion will return
+// `NOT_FOUND`. After a subscription is deleted, a new one may be created with
+// the same name, but the new one has no association with the old
+// subscription or its topic unless the same topic is specified.
+func (c *SubscriberClient) DeleteSubscription(ctx context.Context, req *pubsubpb.DeleteSubscriptionRequest, opts ...gax.CallOption) error {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.DeleteSubscription[0:len(c.CallOptions.DeleteSubscription):len(c.CallOptions.DeleteSubscription)], opts...)
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		_, err = c.subscriberClient.DeleteSubscription(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	return err
+}
+
+// ModifyAckDeadline modifies the ack deadline for a specific message. This method is useful
+// to indicate that more time is needed to process a message by the
+// subscriber, or to make the message available for redelivery if the
+// processing was interrupted. Note that this does not modify the
+// subscription-level `ackDeadlineSeconds` used for subsequent messages.
+func (c *SubscriberClient) ModifyAckDeadline(ctx context.Context, req *pubsubpb.ModifyAckDeadlineRequest, opts ...gax.CallOption) error {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.ModifyAckDeadline[0:len(c.CallOptions.ModifyAckDeadline):len(c.CallOptions.ModifyAckDeadline)], opts...)
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		_, err = c.subscriberClient.ModifyAckDeadline(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	return err
+}
+
+// Acknowledge acknowledges the messages associated with the `ack_ids` in the
+// `AcknowledgeRequest`. The Pub/Sub system can remove the relevant messages
+// from the subscription.
+//
+// Acknowledging a message whose ack deadline has expired may succeed,
+// but such a message may be redelivered later. Acknowledging a message more
+// than once will not result in an error.
+func (c *SubscriberClient) Acknowledge(ctx context.Context, req *pubsubpb.AcknowledgeRequest, opts ...gax.CallOption) error {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.Acknowledge[0:len(c.CallOptions.Acknowledge):len(c.CallOptions.Acknowledge)], opts...)
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		_, err = c.subscriberClient.Acknowledge(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	return err
+}
+
+// Pull pulls messages from the server. Returns an empty list if there are no
+// messages available in the backlog. The server may return `UNAVAILABLE` if
+// there are too many concurrent pull requests pending for the given
+// subscription.
+func (c *SubscriberClient) Pull(ctx context.Context, req *pubsubpb.PullRequest, opts ...gax.CallOption) (*pubsubpb.PullResponse, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.Pull[0:len(c.CallOptions.Pull):len(c.CallOptions.Pull)], opts...)
+	var resp *pubsubpb.PullResponse
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.Pull(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// StreamingPull (EXPERIMENTAL) StreamingPull is an experimental feature. This RPC will
+// respond with UNIMPLEMENTED errors unless you have been invited to test
+// this feature. Contact cloud-pubsub@google.com with any questions.
+//
+// Establishes a stream with the server, which sends messages down to the
+// client. The client streams acknowledgements and ack deadline modifications
+// back to the server. The server will close the stream and return the status
+// on any error. The server may close the stream with status `OK` to reassign
+// server-side resources, in which case, the client should re-establish the
+// stream. `UNAVAILABLE` may also be returned in the case of a transient error
+// (e.g., a server restart). These should also be retried by the client. Flow
+// control can be achieved by configuring the underlying RPC channel.
+func (c *SubscriberClient) StreamingPull(ctx context.Context, opts ...gax.CallOption) (pubsubpb.Subscriber_StreamingPullClient, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.StreamingPull[0:len(c.CallOptions.StreamingPull):len(c.CallOptions.StreamingPull)], opts...)
+	var resp pubsubpb.Subscriber_StreamingPullClient
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.StreamingPull(ctx, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// ModifyPushConfig modifies the `PushConfig` for a specified subscription.
+//
+// This may be used to change a push subscription to a pull one (signified by
+// an empty `PushConfig`) or vice versa, or change the endpoint URL and other
+// attributes of a push subscription. Messages will accumulate for delivery
+// continuously through the call regardless of changes to the `PushConfig`.
+func (c *SubscriberClient) ModifyPushConfig(ctx context.Context, req *pubsubpb.ModifyPushConfigRequest, opts ...gax.CallOption) error {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.ModifyPushConfig[0:len(c.CallOptions.ModifyPushConfig):len(c.CallOptions.ModifyPushConfig)], opts...)
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		_, err = c.subscriberClient.ModifyPushConfig(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	return err
+}
+
+// ListSnapshots lists the existing snapshots.
+func (c *SubscriberClient) ListSnapshots(ctx context.Context, req *pubsubpb.ListSnapshotsRequest, opts ...gax.CallOption) *SnapshotIterator {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.ListSnapshots[0:len(c.CallOptions.ListSnapshots):len(c.CallOptions.ListSnapshots)], opts...)
+	it := &SnapshotIterator{}
+	it.InternalFetch = func(pageSize int, pageToken string) ([]*pubsubpb.Snapshot, string, error) {
+		var resp *pubsubpb.ListSnapshotsResponse
+		req.PageToken = pageToken
+		if pageSize > math.MaxInt32 {
+			req.PageSize = math.MaxInt32
+		} else {
+			req.PageSize = int32(pageSize)
+		}
+		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+			var err error
+			resp, err = c.subscriberClient.ListSnapshots(ctx, req, settings.GRPC...)
+			return err
+		}, opts...)
+		if err != nil {
+			return nil, "", err
+		}
+		return resp.Snapshots, resp.NextPageToken, nil
+	}
+	fetch := func(pageSize int, pageToken string) (string, error) {
+		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
+		if err != nil {
+			return "", err
+		}
+		it.items = append(it.items, items...)
+		return nextPageToken, nil
+	}
+	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
+	return it
+}
+
+// CreateSnapshot creates a snapshot from the requested subscription.
+// If the snapshot already exists, returns `ALREADY_EXISTS`.
+// If the requested subscription doesn't exist, returns `NOT_FOUND`.
+//
+// If the name is not provided in the request, the server will assign a random
+// name for this snapshot on the same project as the subscription, conforming
+// to the
+// [resource name format](https://cloud.google.com/pubsub/docs/overview#names).
+// The generated name is populated in the returned Snapshot object.
+// Note that for REST API requests, you must specify a name in the request.
+func (c *SubscriberClient) CreateSnapshot(ctx context.Context, req *pubsubpb.CreateSnapshotRequest, opts ...gax.CallOption) (*pubsubpb.Snapshot, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.CreateSnapshot[0:len(c.CallOptions.CreateSnapshot):len(c.CallOptions.CreateSnapshot)], opts...)
+	var resp *pubsubpb.Snapshot
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.CreateSnapshot(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// DeleteSnapshot removes an existing snapshot. All messages retained in the snapshot
+// are immediately dropped. After a snapshot is deleted, a new one may be
+// created with the same name, but the new one has no association with the old
+// snapshot or its subscription, unless the same subscription is specified.
+func (c *SubscriberClient) DeleteSnapshot(ctx context.Context, req *pubsubpb.DeleteSnapshotRequest, opts ...gax.CallOption) error {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.DeleteSnapshot[0:len(c.CallOptions.DeleteSnapshot):len(c.CallOptions.DeleteSnapshot)], opts...)
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		_, err = c.subscriberClient.DeleteSnapshot(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	return err
+}
+
+// Seek seeks an existing subscription to a point in time or to a given snapshot,
+// whichever is provided in the request.
+func (c *SubscriberClient) Seek(ctx context.Context, req *pubsubpb.SeekRequest, opts ...gax.CallOption) (*pubsubpb.SeekResponse, error) {
+	ctx = insertXGoog(ctx, c.xGoogHeader)
+	opts = append(c.CallOptions.Seek[0:len(c.CallOptions.Seek):len(c.CallOptions.Seek)], opts...)
+	var resp *pubsubpb.SeekResponse
+	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
+		var err error
+		resp, err = c.subscriberClient.Seek(ctx, req, settings.GRPC...)
+		return err
+	}, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+// SnapshotIterator manages a stream of *pubsubpb.Snapshot.
+type SnapshotIterator struct {
+	items    []*pubsubpb.Snapshot
+	pageInfo *iterator.PageInfo
+	nextFunc func() error
+
+	// InternalFetch is for use by the Google Cloud Libraries only.
+	// It is not part of the stable interface of this package.
+	//
+	// InternalFetch returns results from a single call to the underlying RPC.
+	// The number of results is no greater than pageSize.
+	// If there are no more results, nextPageToken is empty and err is nil.
+	InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Snapshot, nextPageToken string, err error)
+}
+
+// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
+func (it *SnapshotIterator) PageInfo() *iterator.PageInfo {
+	return it.pageInfo
+}
+
+// Next returns the next result. Its second return value is iterator.Done if there are no more
+// results. Once Next returns Done, all subsequent calls will return Done.
+func (it *SnapshotIterator) Next() (*pubsubpb.Snapshot, error) {
+	var item *pubsubpb.Snapshot
+	if err := it.nextFunc(); err != nil {
+		return item, err
+	}
+	item = it.items[0]
+	it.items = it.items[1:]
+	return item, nil
+}
+
+func (it *SnapshotIterator) bufLen() int {
+	return len(it.items)
+}
+
+func (it *SnapshotIterator) takeBuf() interface{} {
+	b := it.items
+	it.items = nil
+	return b
+}
+
+// SubscriptionIterator manages a stream of *pubsubpb.Subscription.
+type SubscriptionIterator struct {
+	items    []*pubsubpb.Subscription
+	pageInfo *iterator.PageInfo
+	nextFunc func() error
+
+	// InternalFetch is for use by the Google Cloud Libraries only.
+	// It is not part of the stable interface of this package.
+	//
+	// InternalFetch returns results from a single call to the underlying RPC.
+	// The number of results is no greater than pageSize.
+	// If there are no more results, nextPageToken is empty and err is nil.
+	InternalFetch func(pageSize int, pageToken string) (results []*pubsubpb.Subscription, nextPageToken string, err error)
+}
+
+// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
+func (it *SubscriptionIterator) PageInfo() *iterator.PageInfo {
+	return it.pageInfo
+}
+
+// Next returns the next result. Its second return value is iterator.Done if there are no more
+// results. Once Next returns Done, all subsequent calls will return Done.
+func (it *SubscriptionIterator) Next() (*pubsubpb.Subscription, error) {
+	var item *pubsubpb.Subscription
+	if err := it.nextFunc(); err != nil {
+		return item, err
+	}
+	item = it.items[0]
+	it.items = it.items[1:]
+	return item, nil
+}
+
+func (it *SubscriptionIterator) bufLen() int {
+	return len(it.items)
+}
+
+func (it *SubscriptionIterator) takeBuf() interface{} {
+	b := it.items
+	it.items = nil
+	return b
+}

vendor/cloud.google.com/go/pubsub/apiv1/subscriber_client_example_test.go

@@ -0,0 +1,340 @@
+// Copyright 2017, Google Inc. All rights reserved.
+//
+// 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.
+
+// AUTO-GENERATED CODE. DO NOT EDIT.
+
+package pubsub_test
+
+import (
+	"io"
+
+	"cloud.google.com/go/pubsub/apiv1"
+	"golang.org/x/net/context"
+	"google.golang.org/api/iterator"
+	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
+)
+
+func ExampleNewSubscriberClient() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use client.
+	_ = c
+}
+
+func ExampleSubscriberClient_SubscriptionIAM() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	subscription := &pubsubpb.Subscription{}
+	h := c.SubscriptionIAM(subscription)
+	policy, err := h.Policy(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	//TODO: Use the IAM policy
+	_ = policy
+}
+
+func ExampleSubscriberClient_TopicIAM() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	topic := &pubsubpb.Topic{}
+	h := c.TopicIAM(topic)
+	policy, err := h.Policy(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	//TODO: Use the IAM policy
+	_ = policy
+}
+
+func ExampleSubscriberClient_CreateSubscription() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.Subscription{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.CreateSubscription(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExampleSubscriberClient_GetSubscription() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.GetSubscriptionRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.GetSubscription(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExampleSubscriberClient_UpdateSubscription() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.UpdateSubscriptionRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.UpdateSubscription(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExampleSubscriberClient_ListSubscriptions() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.ListSubscriptionsRequest{
+	// TODO: Fill request struct fields.
+	}
+	it := c.ListSubscriptions(ctx, req)
+	for {
+		resp, err := it.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			// TODO: Handle error.
+		}
+		// TODO: Use resp.
+		_ = resp
+	}
+}
+
+func ExampleSubscriberClient_DeleteSubscription() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.DeleteSubscriptionRequest{
+	// TODO: Fill request struct fields.
+	}
+	err = c.DeleteSubscription(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+}
+
+func ExampleSubscriberClient_ModifyAckDeadline() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.ModifyAckDeadlineRequest{
+	// TODO: Fill request struct fields.
+	}
+	err = c.ModifyAckDeadline(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+}
+
+func ExampleSubscriberClient_Acknowledge() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.AcknowledgeRequest{
+	// TODO: Fill request struct fields.
+	}
+	err = c.Acknowledge(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+}
+
+func ExampleSubscriberClient_Pull() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.PullRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.Pull(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExampleSubscriberClient_StreamingPull() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	stream, err := c.StreamingPull(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	go func() {
+		reqs := []*pubsubpb.StreamingPullRequest{
+		// TODO: Create requests.
+		}
+		for _, req := range reqs {
+			if err := stream.Send(req); err != nil {
+				// TODO: Handle error.
+			}
+		}
+		stream.CloseSend()
+	}()
+	for {
+		resp, err := stream.Recv()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			// TODO: handle error.
+		}
+		// TODO: Use resp.
+		_ = resp
+	}
+}
+
+func ExampleSubscriberClient_ModifyPushConfig() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.ModifyPushConfigRequest{
+	// TODO: Fill request struct fields.
+	}
+	err = c.ModifyPushConfig(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+}
+
+func ExampleSubscriberClient_ListSnapshots() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.ListSnapshotsRequest{
+	// TODO: Fill request struct fields.
+	}
+	it := c.ListSnapshots(ctx, req)
+	for {
+		resp, err := it.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			// TODO: Handle error.
+		}
+		// TODO: Use resp.
+		_ = resp
+	}
+}
+
+func ExampleSubscriberClient_CreateSnapshot() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.CreateSnapshotRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.CreateSnapshot(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}
+
+func ExampleSubscriberClient_DeleteSnapshot() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.DeleteSnapshotRequest{
+	// TODO: Fill request struct fields.
+	}
+	err = c.DeleteSnapshot(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+}
+
+func ExampleSubscriberClient_Seek() {
+	ctx := context.Background()
+	c, err := pubsub.NewSubscriberClient(ctx)
+	if err != nil {
+		// TODO: Handle error.
+	}
+
+	req := &pubsubpb.SeekRequest{
+	// TODO: Fill request struct fields.
+	}
+	resp, err := c.Seek(ctx, req)
+	if err != nil {
+		// TODO: Handle error.
+	}
+	// TODO: Use resp.
+	_ = resp
+}