Merge pull request #16484 from hashicorp/f-gcloud-backend

Convert gcloud backend

backend/init/init.go

@@ -14,6 +14,7 @@ import (
 	backendAzure "github.com/hashicorp/terraform/backend/remote-state/azure"
 	backendconsul "github.com/hashicorp/terraform/backend/remote-state/consul"
 	backendetcdv3 "github.com/hashicorp/terraform/backend/remote-state/etcdv3"
+	backendGCS "github.com/hashicorp/terraform/backend/remote-state/gcs"
 	backendinmem "github.com/hashicorp/terraform/backend/remote-state/inmem"
 	backendS3 "github.com/hashicorp/terraform/backend/remote-state/s3"
 	backendSwift "github.com/hashicorp/terraform/backend/remote-state/swift"
@@ -47,6 +48,7 @@ func init() {
 			`Warning: "azure" name is deprecated, please use "azurerm"`),
 		"azurerm": func() backend.Backend { return backendAzure.New() },
 		"etcdv3":  func() backend.Backend { return backendetcdv3.New() },
+		"gcs":     func() backend.Backend { return backendGCS.New() },
 	}
 
 	// Add the legacy remote backends that haven't yet been convertd to

backend/remote-state/gcs/backend.go

@@ -0,0 +1,146 @@
+// Package gcs implements remote storage of state on Google Cloud Storage (GCS).
+package gcs
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+
+	"cloud.google.com/go/storage"
+	"github.com/hashicorp/terraform/backend"
+	"github.com/hashicorp/terraform/helper/schema"
+	"github.com/hashicorp/terraform/terraform"
+	"google.golang.org/api/option"
+)
+
+// gcsBackend implements "backend".Backend for GCS.
+// Input(), Validate() and Configure() are implemented by embedding *schema.Backend.
+// State(), DeleteState() and States() are implemented explicitly.
+type gcsBackend struct {
+	*schema.Backend
+
+	storageClient  *storage.Client
+	storageContext context.Context
+
+	bucketName       string
+	prefix           string
+	defaultStateFile string
+
+	projectID string
+	region    string
+}
+
+func New() backend.Backend {
+	be := &gcsBackend{}
+	be.Backend = &schema.Backend{
+		ConfigureFunc: be.configure,
+		Schema: map[string]*schema.Schema{
+			"bucket": {
+				Type:        schema.TypeString,
+				Required:    true,
+				Description: "The name of the Google Cloud Storage bucket",
+			},
+
+			"path": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "Path of the default state file",
+				Deprecated:  "Use the \"prefix\" option instead",
+			},
+
+			"prefix": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "The directory where state files will be saved inside the bucket",
+			},
+
+			"credentials": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "Google Cloud JSON Account Key",
+				Default:     "",
+			},
+
+			"project": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "Google Cloud Project ID",
+				Default:     "",
+			},
+
+			"region": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: "Region / location in which to create the bucket",
+				Default:     "",
+			},
+		},
+	}
+
+	return be
+}
+
+func (b *gcsBackend) configure(ctx context.Context) error {
+	if b.storageClient != nil {
+		return nil
+	}
+
+	// ctx is a background context with the backend config added.
+	// Since no context is passed to remoteClient.Get(), .Lock(), etc. but
+	// one is required for calling the GCP API, we're holding on to this
+	// context here and re-use it later.
+	b.storageContext = ctx
+
+	data := schema.FromContextBackendConfig(b.storageContext)
+
+	b.bucketName = data.Get("bucket").(string)
+	b.prefix = strings.TrimLeft(data.Get("prefix").(string), "/")
+
+	b.defaultStateFile = strings.TrimLeft(data.Get("path").(string), "/")
+
+	b.projectID = data.Get("project").(string)
+	if id := os.Getenv("GOOGLE_PROJECT"); b.projectID == "" && id != "" {
+		b.projectID = id
+	}
+	b.region = data.Get("region").(string)
+	if r := os.Getenv("GOOGLE_REGION"); b.projectID == "" && r != "" {
+		b.region = r
+	}
+
+	opts := []option.ClientOption{
+		option.WithScopes(storage.ScopeReadWrite),
+		option.WithUserAgent(terraform.UserAgentString()),
+	}
+	if credentialsFile := data.Get("credentials").(string); credentialsFile != "" {
+		opts = append(opts, option.WithCredentialsFile(credentialsFile))
+	} else if credentialsFile := os.Getenv("GOOGLE_CREDENTIALS"); credentialsFile != "" {
+		opts = append(opts, option.WithCredentialsFile(credentialsFile))
+	}
+
+	client, err := storage.NewClient(b.storageContext, opts...)
+	if err != nil {
+		return fmt.Errorf("storage.NewClient() failed: %v", err)
+	}
+
+	b.storageClient = client
+
+	return b.ensureBucketExists()
+}
+
+func (b *gcsBackend) ensureBucketExists() error {
+	_, err := b.storageClient.Bucket(b.bucketName).Attrs(b.storageContext)
+	if err != storage.ErrBucketNotExist {
+		return err
+	}
+
+	if b.projectID == "" {
+		return fmt.Errorf("bucket %q does not exist; specify the \"project\" option or create the bucket manually using `gsutil mb gs://%s`", b.bucketName, b.bucketName)
+	}
+
+	attrs := &storage.BucketAttrs{
+		Location: b.region,
+	}
+
+	return b.storageClient.Bucket(b.bucketName).Create(b.storageContext, b.projectID, attrs)
+}

backend/remote-state/gcs/backend_state.go

@@ -0,0 +1,155 @@
+package gcs
+
+import (
+	"fmt"
+	"path"
+	"sort"
+	"strings"
+
+	"cloud.google.com/go/storage"
+	"github.com/hashicorp/terraform/backend"
+	"github.com/hashicorp/terraform/state"
+	"github.com/hashicorp/terraform/state/remote"
+	"github.com/hashicorp/terraform/terraform"
+	"google.golang.org/api/iterator"
+)
+
+const (
+	stateFileSuffix = ".tfstate"
+	lockFileSuffix  = ".tflock"
+)
+
+// States returns a list of names for the states found on GCS. The default
+// state is always returned as the first element in the slice.
+func (b *gcsBackend) States() ([]string, error) {
+	states := []string{backend.DefaultStateName}
+
+	bucket := b.storageClient.Bucket(b.bucketName)
+	objs := bucket.Objects(b.storageContext, &storage.Query{
+		Delimiter: "/",
+		Prefix:    b.prefix,
+	})
+	for {
+		attrs, err := objs.Next()
+		if err == iterator.Done {
+			break
+		}
+		if err != nil {
+			return nil, fmt.Errorf("querying Cloud Storage failed: %v", err)
+		}
+
+		name := path.Base(attrs.Name)
+		if !strings.HasSuffix(name, stateFileSuffix) {
+			continue
+		}
+		st := strings.TrimSuffix(name, stateFileSuffix)
+
+		if st != backend.DefaultStateName {
+			states = append(states, st)
+		}
+	}
+
+	sort.Strings(states[1:])
+	return states, nil
+}
+
+// DeleteState deletes the named state. The "default" state cannot be deleted.
+func (b *gcsBackend) DeleteState(name string) error {
+	if name == backend.DefaultStateName {
+		return fmt.Errorf("cowardly refusing to delete the %q state", name)
+	}
+
+	c, err := b.client(name)
+	if err != nil {
+		return err
+	}
+
+	return c.Delete()
+}
+
+// client returns a remoteClient for the named state.
+func (b *gcsBackend) client(name string) (*remoteClient, error) {
+	if name == "" {
+		return nil, fmt.Errorf("%q is not a valid state name", name)
+	}
+
+	return &remoteClient{
+		storageContext: b.storageContext,
+		storageClient:  b.storageClient,
+		bucketName:     b.bucketName,
+		stateFilePath:  b.stateFile(name),
+		lockFilePath:   b.lockFile(name),
+	}, nil
+}
+
+// State reads and returns the named state from GCS. If the named state does
+// not yet exist, a new state file is created.
+func (b *gcsBackend) State(name string) (state.State, error) {
+	c, err := b.client(name)
+	if err != nil {
+		return nil, err
+	}
+
+	st := &remote.State{Client: c}
+	lockInfo := state.NewLockInfo()
+	lockInfo.Operation = "init"
+	lockID, err := st.Lock(lockInfo)
+	if err != nil {
+		return nil, err
+	}
+
+	// Local helper function so we can call it multiple places
+	unlock := func(baseErr error) error {
+		if err := st.Unlock(lockID); err != nil {
+			const unlockErrMsg = `%v
+Additionally, unlocking the state file on Google Cloud Storage failed:
+
+  Error message: %q
+  Lock ID (gen): %v
+  Lock file URL: %v
+
+You may have to force-unlock this state in order to use it again.
+The GCloud backend acquires a lock during initialization to ensure
+the initial state file is created.`
+			return fmt.Errorf(unlockErrMsg, baseErr, err.Error(), lockID, c.lockFileURL())
+		}
+
+		return baseErr
+	}
+
+	// Grab the value
+	if err := st.RefreshState(); err != nil {
+		return nil, unlock(err)
+	}
+
+	// If we have no state, we have to create an empty state
+	if v := st.State(); v == nil {
+		if err := st.WriteState(terraform.NewState()); err != nil {
+			return nil, unlock(err)
+		}
+		if err := st.PersistState(); err != nil {
+			return nil, unlock(err)
+		}
+	}
+
+	// Unlock, the state should now be initialized
+	if err := unlock(nil); err != nil {
+		return nil, err
+	}
+
+	return st, nil
+}
+
+func (b *gcsBackend) stateFile(name string) string {
+	if name == backend.DefaultStateName && b.defaultStateFile != "" {
+		return b.defaultStateFile
+	}
+	return path.Join(b.prefix, name+stateFileSuffix)
+}
+
+func (b *gcsBackend) lockFile(name string) string {
+	if name == backend.DefaultStateName && b.defaultStateFile != "" {
+		return strings.TrimSuffix(b.defaultStateFile, stateFileSuffix) + lockFileSuffix
+	}
+	return path.Join(b.prefix, name+lockFileSuffix)
+}

backend/remote-state/gcs/backend_test.go

@@ -0,0 +1,205 @@
+package gcs
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/hashicorp/terraform/backend"
+	"github.com/hashicorp/terraform/state/remote"
+)
+
+func TestStateFile(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		prefix           string
+		defaultStateFile string
+		name             string
+		wantStateFile    string
+		wantLockFile     string
+	}{
+		{"state", "", "default", "state/default.tfstate", "state/default.tflock"},
+		{"state", "", "test", "state/test.tfstate", "state/test.tflock"},
+		{"state", "legacy.tfstate", "default", "legacy.tfstate", "legacy.tflock"},
+		{"state", "legacy.tfstate", "test", "state/test.tfstate", "state/test.tflock"},
+		{"state", "legacy.state", "default", "legacy.state", "legacy.state.tflock"},
+		{"state", "legacy.state", "test", "state/test.tfstate", "state/test.tflock"},
+	}
+	for _, c := range cases {
+		b := &gcsBackend{
+			prefix:           c.prefix,
+			defaultStateFile: c.defaultStateFile,
+		}
+
+		if got := b.stateFile(c.name); got != c.wantStateFile {
+			t.Errorf("stateFile(%q) = %q, want %q", c.name, got, c.wantStateFile)
+		}
+
+		if got := b.lockFile(c.name); got != c.wantLockFile {
+			t.Errorf("lockFile(%q) = %q, want %q", c.name, got, c.wantLockFile)
+		}
+	}
+}
+
+func TestRemoteClient(t *testing.T) {
+	t.Parallel()
+
+	be := setupBackend(t)
+	defer teardownBackend(t, be)
+
+	ss, err := be.State(backend.DefaultStateName)
+	if err != nil {
+		t.Fatalf("be.State(%q) = %v", backend.DefaultStateName, err)
+	}
+
+	rs, ok := ss.(*remote.State)
+	if !ok {
+		t.Fatalf("be.State(): got a %T, want a *remote.State", ss)
+	}
+
+	remote.TestClient(t, rs.Client)
+}
+
+func TestRemoteLocks(t *testing.T) {
+	t.Parallel()
+
+	be := setupBackend(t)
+	defer teardownBackend(t, be)
+
+	remoteClient := func() (remote.Client, error) {
+		ss, err := be.State(backend.DefaultStateName)
+		if err != nil {
+			return nil, err
+		}
+
+		rs, ok := ss.(*remote.State)
+		if !ok {
+			return nil, fmt.Errorf("be.State(): got a %T, want a *remote.State", ss)
+		}
+
+		return rs.Client, nil
+	}
+
+	c0, err := remoteClient()
+	if err != nil {
+		t.Fatalf("remoteClient(0) = %v", err)
+	}
+	c1, err := remoteClient()
+	if err != nil {
+		t.Fatalf("remoteClient(1) = %v", err)
+	}
+
+	remote.TestRemoteLocks(t, c0, c1)
+}
+
+func TestBackend(t *testing.T) {
+	t.Parallel()
+
+	be0 := setupBackend(t)
+	defer teardownBackend(t, be0)
+
+	be1 := setupBackend(t)
+
+	backend.TestBackend(t, be0, be1)
+}
+
+// setupBackend returns a new GCS backend.
+func setupBackend(t *testing.T) backend.Backend {
+	t.Helper()
+
+	projectID := os.Getenv("GOOGLE_PROJECT")
+	if projectID == "" || os.Getenv("TF_ACC") == "" {
+		t.Skip("This test creates a bucket in GCS and populates it. " +
+			"Since this may incur costs, it will only run if " +
+			"the TF_ACC and GOOGLE_PROJECT environment variables are set.")
+	}
+
+	config := map[string]interface{}{
+		"project": projectID,
+		"bucket":  toBucketName(projectID + "-" + t.Name()),
+		"prefix":  "",
+	}
+
+	if creds := os.Getenv("GOOGLE_CREDENTIALS"); creds != "" {
+		config["credentials"] = creds
+		t.Logf("using credentials from %q", creds)
+	} else {
+		t.Log("using default credentials; set GOOGLE_CREDENTIALS for custom credentials")
+	}
+
+	return backend.TestBackendConfig(t, New(), config)
+}
+
+// teardownBackend deletes all states from be except the default state.
+func teardownBackend(t *testing.T, be backend.Backend) {
+	t.Helper()
+
+	// Delete all states. The bucket must be empty before it can be deleted.
+	states, err := be.States()
+	if err != nil {
+		t.Fatalf("be.States() = %v; manual clean-up may be required", err)
+	}
+	for _, st := range states {
+		if st == backend.DefaultStateName {
+			continue
+		}
+		if err := be.DeleteState(st); err != nil {
+			t.Fatalf("be.DeleteState(%q) = %v; manual clean-up may be required", st, err)
+		}
+	}
+
+	gcsBE, ok := be.(*gcsBackend)
+	if !ok {
+		t.Fatalf("be is a %T, want a *gcsBackend", be)
+	}
+	ctx := gcsBE.storageContext
+
+	// Delete the default state, which DeleteState() will refuse to do.
+	// It's okay if this fails, not all tests create a default state.
+	if err := gcsBE.storageClient.Bucket(gcsBE.bucketName).Object("default.tfstate").Delete(ctx); err != nil {
+		t.Logf("deleting \"default.tfstate\": %v; manual clean-up may be required", err)
+	}
+
+	// Delete the bucket itself.
+	if err := gcsBE.storageClient.Bucket(gcsBE.bucketName).Delete(ctx); err != nil {
+		t.Fatalf("deleting bucket failed: %v; manual cleanup may be required, though later test runs will happily reuse an existing bucket", err)
+	}
+}
+
+// toBucketName returns a copy of in that is suitable for use as a bucket name.
+// All upper case characters are converted to lower case, other invalid
+// characters are replaced by '_'.
+func toBucketName(in string) string {
+	// Bucket names must contain only lowercase letters, numbers, dashes
+	// (-), and underscores (_).
+	isValid := func(r rune) bool {
+		switch {
+		case r >= 'a' && r <= 'z':
+			return true
+		case r >= '0' && r <= '9':
+			return true
+		case r == '-' || r == '_':
+			return true
+		default:
+			return false
+
+		}
+	}
+
+	out := make([]rune, 0, len(in))
+	for _, r := range strings.ToLower(in) {
+		if !isValid(r) {
+			r = '_'
+		}
+		out = append(out, r)
+	}
+
+	// Bucket names must contain 3 to 63 characters.
+	if len(out) > 63 {
+		out = out[:63]
+	}
+
+	return string(out)
+}

backend/remote-state/gcs/client.go

@@ -0,0 +1,168 @@
+package gcs
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"strconv"
+
+	"cloud.google.com/go/storage"
+	multierror "github.com/hashicorp/go-multierror"
+	"github.com/hashicorp/terraform/state"
+	"github.com/hashicorp/terraform/state/remote"
+	"golang.org/x/net/context"
+)
+
+// remoteClient is used by "state/remote".State to read and write
+// blobs representing state.
+// Implements "state/remote".ClientLocker
+type remoteClient struct {
+	storageContext context.Context
+	storageClient  *storage.Client
+	bucketName     string
+	stateFilePath  string
+	lockFilePath   string
+}
+
+func (c *remoteClient) Get() (payload *remote.Payload, err error) {
+	stateFileReader, err := c.stateFile().NewReader(c.storageContext)
+	if err != nil {
+		if err == storage.ErrObjectNotExist {
+			return nil, nil
+		} else {
+			return nil, fmt.Errorf("Failed to open state file at %v: %v", c.stateFileURL(), err)
+		}
+	}
+	defer stateFileReader.Close()
+
+	stateFileContents, err := ioutil.ReadAll(stateFileReader)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to read state file from %v: %v", c.stateFileURL(), err)
+	}
+
+	stateFileAttrs, err := c.stateFile().Attrs(c.storageContext)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to read state file attrs from %v: %v", c.stateFileURL(), err)
+	}
+
+	result := &remote.Payload{
+		Data: stateFileContents,
+		MD5:  stateFileAttrs.MD5,
+	}
+
+	return result, nil
+}
+
+func (c *remoteClient) Put(data []byte) error {
+	err := func() error {
+		stateFileWriter := c.stateFile().NewWriter(c.storageContext)
+		if _, err := stateFileWriter.Write(data); err != nil {
+			return err
+		}
+		return stateFileWriter.Close()
+	}()
+	if err != nil {
+		return fmt.Errorf("Failed to upload state to %v: %v", c.stateFileURL(), err)
+	}
+
+	return nil
+}
+
+func (c *remoteClient) Delete() error {
+	if err := c.stateFile().Delete(c.storageContext); err != nil {
+		return fmt.Errorf("Failed to delete state file %v: %v", c.stateFileURL(), err)
+	}
+
+	return nil
+}
+
+// Lock writes to a lock file, ensuring file creation. Returns the generation
+// number, which must be passed to Unlock().
+func (c *remoteClient) Lock(info *state.LockInfo) (string, error) {
+	infoJson, err := json.Marshal(info)
+	if err != nil {
+		return "", err
+	}
+
+	lockFile := c.lockFile()
+	w := lockFile.If(storage.Conditions{DoesNotExist: true}).NewWriter(c.storageContext)
+	err = func() error {
+		if _, err := w.Write(infoJson); err != nil {
+			return err
+		}
+		return w.Close()
+	}()
+	if err != nil {
+		return "", c.lockError(fmt.Errorf("writing %q failed: %v", c.lockFileURL(), err))
+	}
+
+	info.ID = strconv.FormatInt(w.Attrs().Generation, 10)
+	info.Path = c.lockFileURL()
+
+	return info.ID, nil
+}
+
+func (c *remoteClient) Unlock(id string) error {
+	gen, err := strconv.ParseInt(id, 10, 64)
+	if err != nil {
+		return err
+	}
+
+	if err := c.lockFile().If(storage.Conditions{GenerationMatch: gen}).Delete(c.storageContext); err != nil {
+		return c.lockError(err)
+	}
+
+	return nil
+}
+
+func (c *remoteClient) lockError(err error) *state.LockError {
+	lockErr := &state.LockError{
+		Err: err,
+	}
+
+	info, infoErr := c.lockInfo()
+	if infoErr != nil {
+		lockErr.Err = multierror.Append(lockErr.Err, infoErr)
+	} else {
+		lockErr.Info = info
+	}
+	return lockErr
+}
+
+// lockInfo reads the lock file, parses its contents and returns the parsed
+// LockInfo struct.
+func (c *remoteClient) lockInfo() (*state.LockInfo, error) {
+	r, err := c.lockFile().NewReader(c.storageContext)
+	if err != nil {
+		return nil, err
+	}
+	defer r.Close()
+
+	rawData, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+
+	info := &state.LockInfo{}
+	if err := json.Unmarshal(rawData, info); err != nil {
+		return nil, err
+	}
+
+	return info, nil
+}
+
+func (c *remoteClient) stateFile() *storage.ObjectHandle {
+	return c.storageClient.Bucket(c.bucketName).Object(c.stateFilePath)
+}
+
+func (c *remoteClient) stateFileURL() string {
+	return fmt.Sprintf("gs://%v/%v", c.bucketName, c.stateFilePath)
+}
+
+func (c *remoteClient) lockFile() *storage.ObjectHandle {
+	return c.storageClient.Bucket(c.bucketName).Object(c.lockFilePath)
+}
+
+func (c *remoteClient) lockFileURL() string {
+	return fmt.Sprintf("gs://%v/%v", c.bucketName, c.lockFilePath)
+}

state/remote/gcs_test.go

@@ -1,69 +0,0 @@
-package remote
-
-import (
-	"fmt"
-	"os"
-	"testing"
-	"time"
-
-	storage "google.golang.org/api/storage/v1"
-)
-
-func TestGCSClient_impl(t *testing.T) {
-	var _ Client = new(GCSClient)
-}
-
-func TestGCSClient(t *testing.T) {
-	// This test creates a bucket in GCS and populates it.
-	// It may incur costs, so it will only run if GCS credential environment
-	// variables are present.
-
-	projectID := os.Getenv("GOOGLE_PROJECT")
-	if projectID == "" {
-		t.Skipf("skipping; GOOGLE_PROJECT must be set")
-	}
-
-	bucketName := fmt.Sprintf("terraform-remote-gcs-test-%x", time.Now().Unix())
-	keyName := "testState"
-	testData := []byte(`testing data`)
-
-	config := make(map[string]string)
-	config["bucket"] = bucketName
-	config["path"] = keyName
-
-	client, err := gcsFactory(config)
-	if err != nil {
-		t.Fatalf("Error for valid config: %v", err)
-	}
-
-	gcsClient := client.(*GCSClient)
-	nativeClient := gcsClient.clientStorage
-
-	// Be clear about what we're doing in case the user needs to clean
-	// this up later.
-	if _, err := nativeClient.Buckets.Get(bucketName).Do(); err == nil {
-		fmt.Printf("Bucket %s already exists - skipping buckets.insert call.", bucketName)
-	} else {
-		// Create a bucket.
-		if res, err := nativeClient.Buckets.Insert(projectID, &storage.Bucket{Name: bucketName}).Do(); err == nil {
-			fmt.Printf("Created bucket %v at location %v\n\n", res.Name, res.SelfLink)
-		} else {
-			t.Skipf("Failed to create test GCS bucket, so skipping")
-		}
-	}
-
-	// Ensure we can perform a PUT request with the encryption header
-	err = gcsClient.Put(testData)
-	if err != nil {
-		t.Logf("WARNING: Failed to send test data to GCS bucket. (error was %s)", err)
-	}
-
-	defer func() {
-		// Delete the test bucket in the project
-		if err := gcsClient.clientStorage.Buckets.Delete(bucketName).Do(); err != nil {
-			t.Logf("WARNING: Failed to delete the test GCS bucket. It has been left in your GCE account and may incur storage charges. (error was %s)", err)
-		}
-	}()
-
-	testClient(t, client)
-}

state/remote/remote.go

@@ -47,7 +47,6 @@ func NewClient(t string, conf map[string]string) (Client, error) {
 var BuiltinClients = map[string]Factory{
 	"artifactory": artifactoryFactory,
 	"etcd":        etcdFactory,
-	"gcs":         gcsFactory,
 	"http":        httpFactory,
 	"local":       fileFactory,
 	"manta":       mantaFactory,

vendor/cloud.google.com/go/iam/iam.go

@@ -0,0 +1,256 @@
+// Copyright 2016 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.
+
+// Package iam supports the resource-specific operations of Google Cloud
+// IAM (Identity and Access Management) for the Google Cloud Libraries.
+// See https://cloud.google.com/iam for more about IAM.
+//
+// Users of the Google Cloud Libraries will typically not use this package
+// directly. Instead they will begin with some resource that supports IAM, like
+// a pubsub topic, and call its IAM method to get a Handle for that resource.
+package iam
+
+import (
+	"golang.org/x/net/context"
+	pb "google.golang.org/genproto/googleapis/iam/v1"
+	"google.golang.org/grpc"
+)
+
+// client abstracts the IAMPolicy API to allow multiple implementations.
+type client interface {
+	Get(ctx context.Context, resource string) (*pb.Policy, error)
+	Set(ctx context.Context, resource string, p *pb.Policy) error
+	Test(ctx context.Context, resource string, perms []string) ([]string, error)
+}
+
+// grpcClient implements client for the standard gRPC-based IAMPolicy service.
+type grpcClient struct {
+	c pb.IAMPolicyClient
+}
+
+func (g *grpcClient) Get(ctx context.Context, resource string) (*pb.Policy, error) {
+	proto, err := g.c.GetIamPolicy(ctx, &pb.GetIamPolicyRequest{Resource: resource})
+	if err != nil {
+		return nil, err
+	}
+	return proto, nil
+}
+func (g *grpcClient) Set(ctx context.Context, resource string, p *pb.Policy) error {
+	_, err := g.c.SetIamPolicy(ctx, &pb.SetIamPolicyRequest{
+		Resource: resource,
+		Policy:   p,
+	})
+	return err
+}
+
+func (g *grpcClient) Test(ctx context.Context, resource string, perms []string) ([]string, error) {
+	res, err := g.c.TestIamPermissions(ctx, &pb.TestIamPermissionsRequest{
+		Resource:    resource,
+		Permissions: perms,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return res.Permissions, nil
+}
+
+// A Handle provides IAM operations for a resource.
+type Handle struct {
+	c        client
+	resource string
+}
+
+// InternalNewHandle is for use by the Google Cloud Libraries only.
+//
+// InternalNewHandle returns a Handle for resource.
+// The conn parameter refers to a server that must support the IAMPolicy service.
+func InternalNewHandle(conn *grpc.ClientConn, resource string) *Handle {
+	return InternalNewHandleClient(&grpcClient{c: pb.NewIAMPolicyClient(conn)}, resource)
+}
+
+// InternalNewHandleClient is for use by the Google Cloud Libraries only.
+//
+// InternalNewHandleClient returns a Handle for resource using the given
+// client implementation.
+func InternalNewHandleClient(c client, resource string) *Handle {
+	return &Handle{
+		c:        c,
+		resource: resource,
+	}
+}
+
+// Policy retrieves the IAM policy for the resource.
+func (h *Handle) Policy(ctx context.Context) (*Policy, error) {
+	proto, err := h.c.Get(ctx, h.resource)
+	if err != nil {
+		return nil, err
+	}
+	return &Policy{InternalProto: proto}, nil
+}
+
+// SetPolicy replaces the resource's current policy with the supplied Policy.
+//
+// If policy was created from a prior call to Get, then the modification will
+// only succeed if the policy has not changed since the Get.
+func (h *Handle) SetPolicy(ctx context.Context, policy *Policy) error {
+	return h.c.Set(ctx, h.resource, policy.InternalProto)
+}
+
+// TestPermissions returns the subset of permissions that the caller has on the resource.
+func (h *Handle) TestPermissions(ctx context.Context, permissions []string) ([]string, error) {
+	return h.c.Test(ctx, h.resource, permissions)
+}
+
+// A RoleName is a name representing a collection of permissions.
+type RoleName string
+
+// Common role names.
+const (
+	Owner  RoleName = "roles/owner"
+	Editor RoleName = "roles/editor"
+	Viewer RoleName = "roles/viewer"
+)
+
+const (
+	// AllUsers is a special member that denotes all users, even unauthenticated ones.
+	AllUsers = "allUsers"
+
+	// AllAuthenticatedUsers is a special member that denotes all authenticated users.
+	AllAuthenticatedUsers = "allAuthenticatedUsers"
+)
+
+// A Policy is a list of Bindings representing roles
+// granted to members.
+//
+// The zero Policy is a valid policy with no bindings.
+type Policy struct {
+	// TODO(jba): when type aliases are available, put Policy into an internal package
+	// and provide an exported alias here.
+
+	// This field is exported for use by the Google Cloud Libraries only.
+	// It may become unexported in a future release.
+	InternalProto *pb.Policy
+}
+
+// Members returns the list of members with the supplied role.
+// The return value should not be modified. Use Add and Remove
+// to modify the members of a role.
+func (p *Policy) Members(r RoleName) []string {
+	b := p.binding(r)
+	if b == nil {
+		return nil
+	}
+	return b.Members
+}
+
+// HasRole reports whether member has role r.
+func (p *Policy) HasRole(member string, r RoleName) bool {
+	return memberIndex(member, p.binding(r)) >= 0
+}
+
+// Add adds member member to role r if it is not already present.
+// A new binding is created if there is no binding for the role.
+func (p *Policy) Add(member string, r RoleName) {
+	b := p.binding(r)
+	if b == nil {
+		if p.InternalProto == nil {
+			p.InternalProto = &pb.Policy{}
+		}
+		p.InternalProto.Bindings = append(p.InternalProto.Bindings, &pb.Binding{
+			Role:    string(r),
+			Members: []string{member},
+		})
+		return
+	}
+	if memberIndex(member, b) < 0 {
+		b.Members = append(b.Members, member)
+		return
+	}
+}
+
+// Remove removes member from role r if it is present.
+func (p *Policy) Remove(member string, r RoleName) {
+	bi := p.bindingIndex(r)
+	if bi < 0 {
+		return
+	}
+	bindings := p.InternalProto.Bindings
+	b := bindings[bi]
+	mi := memberIndex(member, b)
+	if mi < 0 {
+		return
+	}
+	// Order doesn't matter for bindings or members, so to remove, move the last item
+	// into the removed spot and shrink the slice.
+	if len(b.Members) == 1 {
+		// Remove binding.
+		last := len(bindings) - 1
+		bindings[bi] = bindings[last]
+		bindings[last] = nil
+		p.InternalProto.Bindings = bindings[:last]
+		return
+	}
+	// Remove member.
+	// TODO(jba): worry about multiple copies of m?
+	last := len(b.Members) - 1
+	b.Members[mi] = b.Members[last]
+	b.Members[last] = ""
+	b.Members = b.Members[:last]
+}
+
+// Roles returns the names of all the roles that appear in the Policy.
+func (p *Policy) Roles() []RoleName {
+	if p.InternalProto == nil {
+		return nil
+	}
+	var rns []RoleName
+	for _, b := range p.InternalProto.Bindings {
+		rns = append(rns, RoleName(b.Role))
+	}
+	return rns
+}
+
+// binding returns the Binding for the suppied role, or nil if there isn't one.
+func (p *Policy) binding(r RoleName) *pb.Binding {
+	i := p.bindingIndex(r)
+	if i < 0 {
+		return nil
+	}
+	return p.InternalProto.Bindings[i]
+}
+
+func (p *Policy) bindingIndex(r RoleName) int {
+	if p.InternalProto == nil {
+		return -1
+	}
+	for i, b := range p.InternalProto.Bindings {
+		if b.Role == string(r) {
+			return i
+		}
+	}
+	return -1
+}
+
+// memberIndex returns the index of m in b's Members, or -1 if not found.
+func memberIndex(m string, b *pb.Binding) int {
+	if b == nil {
+		return -1
+	}
+	for i, mm := range b.Members {
+		if mm == m {
+			return i
+		}
+	}
+	return -1
+}

vendor/cloud.google.com/go/internal/optional/optional.go

@@ -0,0 +1,108 @@
+// Copyright 2016 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.
+
+// Package optional provides versions of primitive types that can
+// be nil. These are useful in methods that update some of an API object's
+// fields.
+package optional
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+type (
+	// Bool is either a bool or nil.
+	Bool interface{}
+
+	// String is either a string or nil.
+	String interface{}
+
+	// Int is either an int or nil.
+	Int interface{}
+
+	// Uint is either a uint or nil.
+	Uint interface{}
+
+	// Float64 is either a float64 or nil.
+	Float64 interface{}
+
+	// Duration is either a time.Duration or nil.
+	Duration interface{}
+)
+
+// ToBool returns its argument as a bool.
+// It panics if its argument is nil or not a bool.
+func ToBool(v Bool) bool {
+	x, ok := v.(bool)
+	if !ok {
+		doPanic("Bool", v)
+	}
+	return x
+}
+
+// ToString returns its argument as a string.
+// It panics if its argument is nil or not a string.
+func ToString(v String) string {
+	x, ok := v.(string)
+	if !ok {
+		doPanic("String", v)
+	}
+	return x
+}
+
+// ToInt returns its argument as an int.
+// It panics if its argument is nil or not an int.
+func ToInt(v Int) int {
+	x, ok := v.(int)
+	if !ok {
+		doPanic("Int", v)
+	}
+	return x
+}
+
+// ToUint returns its argument as a uint.
+// It panics if its argument is nil or not a uint.
+func ToUint(v Uint) uint {
+	x, ok := v.(uint)
+	if !ok {
+		doPanic("Uint", v)
+	}
+	return x
+}
+
+// ToFloat64 returns its argument as a float64.
+// It panics if its argument is nil or not a float64.
+func ToFloat64(v Float64) float64 {
+	x, ok := v.(float64)
+	if !ok {
+		doPanic("Float64", v)
+	}
+	return x
+}
+
+// ToDuration returns its argument as a time.Duration.
+// It panics if its argument is nil or not a time.Duration.
+func ToDuration(v Duration) time.Duration {
+	x, ok := v.(time.Duration)
+	if !ok {
+		doPanic("Duration", v)
+	}
+	return x
+}
+
+func doPanic(capType string, v interface{}) {
+	panic(fmt.Sprintf("optional.%s value should be %s, got %T", capType, strings.ToLower(capType), v))
+}

vendor/cloud.google.com/go/internal/version/update_version.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+today=$(date +%Y%m%d)
+
+sed -i -r -e 's/const Repo = "([0-9]{8})"/const Repo = "'$today'"/' $GOFILE
+

vendor/cloud.google.com/go/internal/version/version.go

@@ -0,0 +1,71 @@
+// Copyright 2016 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.
+
+//go:generate ./update_version.sh
+
+// Package version contains version information for Google Cloud Client
+// Libraries for Go, as reported in request headers.
+package version
+
+import (
+	"runtime"
+	"strings"
+	"unicode"
+)
+
+// Repo is the current version of the client libraries in this
+// repo. It should be a date in YYYYMMDD format.
+const Repo = "20170928"
+
+// Go returns the Go runtime version. The returned string
+// has no whitespace.
+func Go() string {
+	return goVersion
+}
+
+var goVersion = goVer(runtime.Version())
+
+const develPrefix = "devel +"
+
+func goVer(s string) string {
+	if strings.HasPrefix(s, develPrefix) {
+		s = s[len(develPrefix):]
+		if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 {
+			s = s[:p]
+		}
+		return s
+	}
+
+	if strings.HasPrefix(s, "go1") {
+		s = s[2:]
+		var prerelease string
+		if p := strings.IndexFunc(s, notSemverRune); p >= 0 {
+			s, prerelease = s[:p], s[p:]
+		}
+		if strings.HasSuffix(s, ".") {
+			s += "0"
+		} else if strings.Count(s, ".") < 2 {
+			s += ".0"
+		}
+		if prerelease != "" {
+			s += "-" + prerelease
+		}
+		return s
+	}
+	return ""
+}
+
+func notSemverRune(r rune) bool {
+	return strings.IndexRune("0123456789.", r) < 0
+}

vendor/cloud.google.com/go/storage/acl.go

@@ -0,0 +1,252 @@
+// Copyright 2014 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.
+
+package storage
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+
+	"golang.org/x/net/context"
+	"google.golang.org/api/googleapi"
+	raw "google.golang.org/api/storage/v1"
+)
+
+// ACLRole is the level of access to grant.
+type ACLRole string
+
+const (
+	RoleOwner  ACLRole = "OWNER"
+	RoleReader ACLRole = "READER"
+	RoleWriter ACLRole = "WRITER"
+)
+
+// ACLEntity refers to a user or group.
+// They are sometimes referred to as grantees.
+//
+// It could be in the form of:
+// "user-<userId>", "user-<email>", "group-<groupId>", "group-<email>",
+// "domain-<domain>" and "project-team-<projectId>".
+//
+// Or one of the predefined constants: AllUsers, AllAuthenticatedUsers.
+type ACLEntity string
+
+const (
+	AllUsers              ACLEntity = "allUsers"
+	AllAuthenticatedUsers ACLEntity = "allAuthenticatedUsers"
+)
+
+// ACLRule represents a grant for a role to an entity (user, group or team) for a Google Cloud Storage object or bucket.
+type ACLRule struct {
+	Entity ACLEntity
+	Role   ACLRole
+}
+
+// ACLHandle provides operations on an access control list for a Google Cloud Storage bucket or object.
+type ACLHandle struct {
+	c           *Client
+	bucket      string
+	object      string
+	isDefault   bool
+	userProject string // for requester-pays buckets
+}
+
+// Delete permanently deletes the ACL entry for the given entity.
+func (a *ACLHandle) Delete(ctx context.Context, entity ACLEntity) error {
+	if a.object != "" {
+		return a.objectDelete(ctx, entity)
+	}
+	if a.isDefault {
+		return a.bucketDefaultDelete(ctx, entity)
+	}
+	return a.bucketDelete(ctx, entity)
+}
+
+// Set sets the permission level for the given entity.
+func (a *ACLHandle) Set(ctx context.Context, entity ACLEntity, role ACLRole) error {
+	if a.object != "" {
+		return a.objectSet(ctx, entity, role, false)
+	}
+	if a.isDefault {
+		return a.objectSet(ctx, entity, role, true)
+	}
+	return a.bucketSet(ctx, entity, role)
+}
+
+// List retrieves ACL entries.
+func (a *ACLHandle) List(ctx context.Context) ([]ACLRule, error) {
+	if a.object != "" {
+		return a.objectList(ctx)
+	}
+	if a.isDefault {
+		return a.bucketDefaultList(ctx)
+	}
+	return a.bucketList(ctx)
+}
+
+func (a *ACLHandle) bucketDefaultList(ctx context.Context) ([]ACLRule, error) {
+	var acls *raw.ObjectAccessControls
+	var err error
+	err = runWithRetry(ctx, func() error {
+		req := a.c.raw.DefaultObjectAccessControls.List(a.bucket)
+		a.configureCall(req, ctx)
+		acls, err = req.Do()
+		return err
+	})
+	if err != nil {
+		return nil, fmt.Errorf("storage: error listing default object ACL for bucket %q: %v", a.bucket, err)
+	}
+	return toACLRules(acls.Items), nil
+}
+
+func (a *ACLHandle) bucketDefaultDelete(ctx context.Context, entity ACLEntity) error {
+	err := runWithRetry(ctx, func() error {
+		req := a.c.raw.DefaultObjectAccessControls.Delete(a.bucket, string(entity))
+		a.configureCall(req, ctx)
+		return req.Do()
+	})
+	if err != nil {
+		return fmt.Errorf("storage: error deleting default ACL entry for bucket %q, entity %q: %v", a.bucket, entity, err)
+	}
+	return nil
+}
+
+func (a *ACLHandle) bucketList(ctx context.Context) ([]ACLRule, error) {
+	var acls *raw.BucketAccessControls
+	var err error
+	err = runWithRetry(ctx, func() error {
+		req := a.c.raw.BucketAccessControls.List(a.bucket)
+		a.configureCall(req, ctx)
+		acls, err = req.Do()
+		return err
+	})
+	if err != nil {
+		return nil, fmt.Errorf("storage: error listing bucket ACL for bucket %q: %v", a.bucket, err)
+	}
+	r := make([]ACLRule, len(acls.Items))
+	for i, v := range acls.Items {
+		r[i].Entity = ACLEntity(v.Entity)
+		r[i].Role = ACLRole(v.Role)
+	}
+	return r, nil
+}
+
+func (a *ACLHandle) bucketSet(ctx context.Context, entity ACLEntity, role ACLRole) error {
+	acl := &raw.BucketAccessControl{
+		Bucket: a.bucket,
+		Entity: string(entity),
+		Role:   string(role),
+	}
+	err := runWithRetry(ctx, func() error {
+		req := a.c.raw.BucketAccessControls.Update(a.bucket, string(entity), acl)
+		a.configureCall(req, ctx)
+		_, err := req.Do()
+		return err
+	})
+	if err != nil {
+		return fmt.Errorf("storage: error updating bucket ACL entry for bucket %q, entity %q: %v", a.bucket, entity, err)
+	}
+	return nil
+}
+
+func (a *ACLHandle) bucketDelete(ctx context.Context, entity ACLEntity) error {
+	err := runWithRetry(ctx, func() error {
+		req := a.c.raw.BucketAccessControls.Delete(a.bucket, string(entity))
+		a.configureCall(req, ctx)
+		return req.Do()
+	})
+	if err != nil {
+		return fmt.Errorf("storage: error deleting bucket ACL entry for bucket %q, entity %q: %v", a.bucket, entity, err)
+	}
+	return nil
+}
+
+func (a *ACLHandle) objectList(ctx context.Context) ([]ACLRule, error) {
+	var acls *raw.ObjectAccessControls
+	var err error
+	err = runWithRetry(ctx, func() error {
+		req := a.c.raw.ObjectAccessControls.List(a.bucket, a.object)
+		a.configureCall(req, ctx)
+		acls, err = req.Do()
+		return err
+	})
+	if err != nil {
+		return nil, fmt.Errorf("storage: error listing object ACL for bucket %q, file %q: %v", a.bucket, a.object, err)
+	}
+	return toACLRules(acls.Items), nil
+}
+
+func (a *ACLHandle) objectSet(ctx context.Context, entity ACLEntity, role ACLRole, isBucketDefault bool) error {
+	type setRequest interface {
+		Do(opts ...googleapi.CallOption) (*raw.ObjectAccessControl, error)
+		Header() http.Header
+	}
+
+	acl := &raw.ObjectAccessControl{
+		Bucket: a.bucket,
+		Entity: string(entity),
+		Role:   string(role),
+	}
+	var req setRequest
+	if isBucketDefault {
+		req = a.c.raw.DefaultObjectAccessControls.Update(a.bucket, string(entity), acl)
+	} else {
+		req = a.c.raw.ObjectAccessControls.Update(a.bucket, a.object, string(entity), acl)
+	}
+	a.configureCall(req, ctx)
+	err := runWithRetry(ctx, func() error {
+		_, err := req.Do()
+		return err
+	})
+	if err != nil {
+		if isBucketDefault {
+			return fmt.Errorf("storage: error updating default ACL entry for bucket %q, entity %q: %v", a.bucket, entity, err)
+		} else {
+			return fmt.Errorf("storage: error updating object ACL entry for bucket %q, object %q, entity %q: %v", a.bucket, a.object, entity, err)
+		}
+	}
+	return nil
+}
+
+func (a *ACLHandle) objectDelete(ctx context.Context, entity ACLEntity) error {
+	err := runWithRetry(ctx, func() error {
+		req := a.c.raw.ObjectAccessControls.Delete(a.bucket, a.object, string(entity))
+		a.configureCall(req, ctx)
+		return req.Do()
+	})
+	if err != nil {
+		return fmt.Errorf("storage: error deleting object ACL entry for bucket %q, file %q, entity %q: %v", a.bucket, a.object, entity, err)
+	}
+	return nil
+}
+
+func (a *ACLHandle) configureCall(call interface {
+	Header() http.Header
+}, ctx context.Context) {
+	vc := reflect.ValueOf(call)
+	vc.MethodByName("Context").Call([]reflect.Value{reflect.ValueOf(ctx)})
+	if a.userProject != "" {
+		vc.MethodByName("UserProject").Call([]reflect.Value{reflect.ValueOf(a.userProject)})
+	}
+	setClientHeader(call.Header())
+}
+
+func toACLRules(items []*raw.ObjectAccessControl) []ACLRule {
+	r := make([]ACLRule, 0, len(items))
+	for _, item := range items {
+		r = append(r, ACLRule{Entity: ACLEntity(item.Entity), Role: ACLRole(item.Role)})
+	}
+	return r
+}

vendor/cloud.google.com/go/storage/bucket.go

@@ -0,0 +1,761 @@
+// Copyright 2014 Google Inc. LiveAndArchived 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.
+
+package storage
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"time"
+
+	"cloud.google.com/go/internal/optional"
+	"golang.org/x/net/context"
+	"google.golang.org/api/googleapi"
+	"google.golang.org/api/iterator"
+	raw "google.golang.org/api/storage/v1"
+)
+
+// BucketHandle provides operations on a Google Cloud Storage bucket.
+// Use Client.Bucket to get a handle.
+type BucketHandle struct {
+	c                *Client
+	name             string
+	acl              ACLHandle
+	defaultObjectACL ACLHandle
+	conds            *BucketConditions
+	userProject      string // project for requester-pays buckets
+}
+
+// Bucket returns a BucketHandle, which provides operations on the named bucket.
+// This call does not perform any network operations.
+//
+// The supplied name must contain only lowercase letters, numbers, dashes,
+// underscores, and dots. The full specification for valid bucket names can be
+// found at:
+//   https://cloud.google.com/storage/docs/bucket-naming
+func (c *Client) Bucket(name string) *BucketHandle {
+	return &BucketHandle{
+		c:    c,
+		name: name,
+		acl: ACLHandle{
+			c:      c,
+			bucket: name,
+		},
+		defaultObjectACL: ACLHandle{
+			c:         c,
+			bucket:    name,
+			isDefault: true,
+		},
+	}
+}
+
+// Create creates the Bucket in the project.
+// If attrs is nil the API defaults will be used.
+func (b *BucketHandle) Create(ctx context.Context, projectID string, attrs *BucketAttrs) error {
+	var bkt *raw.Bucket
+	if attrs != nil {
+		bkt = attrs.toRawBucket()
+	} else {
+		bkt = &raw.Bucket{}
+	}
+	bkt.Name = b.name
+	// If there is lifecycle information but no location, explicitly set
+	// the location. This is a GCS quirk/bug.
+	if bkt.Location == "" && bkt.Lifecycle != nil {
+		bkt.Location = "US"
+	}
+	req := b.c.raw.Buckets.Insert(projectID, bkt)
+	setClientHeader(req.Header())
+	return runWithRetry(ctx, func() error { _, err := req.Context(ctx).Do(); return err })
+}
+
+// Delete deletes the Bucket.
+func (b *BucketHandle) Delete(ctx context.Context) error {
+	req, err := b.newDeleteCall()
+	if err != nil {
+		return err
+	}
+	return runWithRetry(ctx, func() error { return req.Context(ctx).Do() })
+}
+
+func (b *BucketHandle) newDeleteCall() (*raw.BucketsDeleteCall, error) {
+	req := b.c.raw.Buckets.Delete(b.name)
+	setClientHeader(req.Header())
+	if err := applyBucketConds("BucketHandle.Delete", b.conds, req); err != nil {
+		return nil, err
+	}
+	if b.userProject != "" {
+		req.UserProject(b.userProject)
+	}
+	return req, nil
+}
+
+// ACL returns an ACLHandle, which provides access to the bucket's access control list.
+// This controls who can list, create or overwrite the objects in a bucket.
+// This call does not perform any network operations.
+func (b *BucketHandle) ACL() *ACLHandle {
+	return &b.acl
+}
+
+// DefaultObjectACL returns an ACLHandle, which provides access to the bucket's default object ACLs.
+// These ACLs are applied to newly created objects in this bucket that do not have a defined ACL.
+// This call does not perform any network operations.
+func (b *BucketHandle) DefaultObjectACL() *ACLHandle {
+	return &b.defaultObjectACL
+}
+
+// Object returns an ObjectHandle, which provides operations on the named object.
+// This call does not perform any network operations.
+//
+// name must consist entirely of valid UTF-8-encoded runes. The full specification
+// for valid object names can be found at:
+//   https://cloud.google.com/storage/docs/bucket-naming
+func (b *BucketHandle) Object(name string) *ObjectHandle {
+	return &ObjectHandle{
+		c:      b.c,
+		bucket: b.name,
+		object: name,
+		acl: ACLHandle{
+			c:           b.c,
+			bucket:      b.name,
+			object:      name,
+			userProject: b.userProject,
+		},
+		gen:         -1,
+		userProject: b.userProject,
+	}
+}
+
+// Attrs returns the metadata for the bucket.
+func (b *BucketHandle) Attrs(ctx context.Context) (*BucketAttrs, error) {
+	req, err := b.newGetCall()
+	if err != nil {
+		return nil, err
+	}
+	var resp *raw.Bucket
+	err = runWithRetry(ctx, func() error {
+		resp, err = req.Context(ctx).Do()
+		return err
+	})
+	if e, ok := err.(*googleapi.Error); ok && e.Code == http.StatusNotFound {
+		return nil, ErrBucketNotExist
+	}
+	if err != nil {
+		return nil, err
+	}
+	return newBucket(resp), nil
+}
+
+func (b *BucketHandle) newGetCall() (*raw.BucketsGetCall, error) {
+	req := b.c.raw.Buckets.Get(b.name).Projection("full")
+	setClientHeader(req.Header())
+	if err := applyBucketConds("BucketHandle.Attrs", b.conds, req); err != nil {
+		return nil, err
+	}
+	if b.userProject != "" {
+		req.UserProject(b.userProject)
+	}
+	return req, nil
+}
+
+func (b *BucketHandle) Update(ctx context.Context, uattrs BucketAttrsToUpdate) (*BucketAttrs, error) {
+	req, err := b.newPatchCall(&uattrs)
+	if err != nil {
+		return nil, err
+	}
+	// TODO(jba): retry iff metagen is set?
+	rb, err := req.Context(ctx).Do()
+	if err != nil {
+		return nil, err
+	}
+	return newBucket(rb), nil
+}
+
+func (b *BucketHandle) newPatchCall(uattrs *BucketAttrsToUpdate) (*raw.BucketsPatchCall, error) {
+	rb := uattrs.toRawBucket()
+	req := b.c.raw.Buckets.Patch(b.name, rb).Projection("full")
+	setClientHeader(req.Header())
+	if err := applyBucketConds("BucketHandle.Update", b.conds, req); err != nil {
+		return nil, err
+	}
+	if b.userProject != "" {
+		req.UserProject(b.userProject)
+	}
+	return req, nil
+}
+
+// BucketAttrs represents the metadata for a Google Cloud Storage bucket.
+// Read-only fields are ignored by BucketHandle.Create.
+type BucketAttrs struct {
+	// Name is the name of the bucket.
+	// This field is read-only.
+	Name string
+
+	// ACL is the list of access control rules on the bucket.
+	ACL []ACLRule
+
+	// DefaultObjectACL is the list of access controls to
+	// apply to new objects when no object ACL is provided.
+	DefaultObjectACL []ACLRule
+
+	// Location is the location of the bucket. It defaults to "US".
+	Location string
+
+	// MetaGeneration is the metadata generation of the bucket.
+	// This field is read-only.
+	MetaGeneration int64
+
+	// StorageClass is the default storage class of the bucket. This defines
+	// how objects in the bucket are stored and determines the SLA
+	// and the cost of storage. Typical values are "MULTI_REGIONAL",
+	// "REGIONAL", "NEARLINE", "COLDLINE", "STANDARD" and
+	// "DURABLE_REDUCED_AVAILABILITY". Defaults to "STANDARD", which
+	// is equivalent to "MULTI_REGIONAL" or "REGIONAL" depending on
+	// the bucket's location settings.
+	StorageClass string
+
+	// Created is the creation time of the bucket.
+	// This field is read-only.
+	Created time.Time
+
+	// VersioningEnabled reports whether this bucket has versioning enabled.
+	VersioningEnabled bool
+
+	// Labels are the bucket's labels.
+	Labels map[string]string
+
+	// RequesterPays reports whether the bucket is a Requester Pays bucket.
+	RequesterPays bool
+	// Lifecycle is the lifecycle configuration for objects in the bucket.
+	Lifecycle Lifecycle
+}
+
+// Lifecycle is the lifecycle configuration for objects in the bucket.
+type Lifecycle struct {
+	Rules []LifecycleRule
+}
+
+const (
+	// RFC3339 date with only the date segment, used for CreatedBefore in LifecycleRule.
+	rfc3339Date = "2006-01-02"
+
+	// DeleteAction is a lifecycle action that deletes a live and/or archived
+	// objects. Takes precendence over SetStorageClass actions.
+	DeleteAction = "Delete"
+
+	// SetStorageClassAction changes the storage class of live and/or archived
+	// objects.
+	SetStorageClassAction = "SetStorageClass"
+)
+
+// LifecycleRule is a lifecycle configuration rule.
+//
+// When all the configured conditions are met by an object in the bucket, the
+// configured action will automatically be taken on that object.
+type LifecycleRule struct {
+	// Action is the action to take when all of the associated conditions are
+	// met.
+	Action LifecycleAction
+
+	// Condition is the set of conditions that must be met for the associated
+	// action to be taken.
+	Condition LifecycleCondition
+}
+
+// LifecycleAction is a lifecycle configuration action.
+type LifecycleAction struct {
+	// Type is the type of action to take on matching objects.
+	//
+	// Acceptable values are "Delete" to delete matching objects and
+	// "SetStorageClass" to set the storage class defined in StorageClass on
+	// matching objects.
+	Type string
+
+	// StorageClass is the storage class to set on matching objects if the Action
+	// is "SetStorageClass".
+	StorageClass string
+}
+
+// Liveness specifies whether the object is live or not.
+type Liveness int
+
+const (
+	// LiveAndArchived includes both live and archived objects.
+	LiveAndArchived Liveness = iota
+	// Live specifies that the object is still live.
+	Live
+	// Archived specifies that the object is archived.
+	Archived
+)
+
+// LifecycleCondition is a set of conditions used to match objects and take an
+// action automatically.
+//
+// All configured conditions must be met for the associated action to be taken.
+type LifecycleCondition struct {
+	// AgeInDays is the age of the object in days.
+	AgeInDays int64
+
+	// CreatedBefore is the time the object was created.
+	//
+	// This condition is satisfied when an object is created before midnight of
+	// the specified date in UTC.
+	CreatedBefore time.Time
+
+	// Liveness specifies the object's liveness. Relevant only for versioned objects
+	Liveness Liveness
+
+	// MatchesStorageClasses is the condition matching the object's storage
+	// class.
+	//
+	// Values include "MULTI_REGIONAL", "REGIONAL", "NEARLINE", "COLDLINE",
+	// "STANDARD", and "DURABLE_REDUCED_AVAILABILITY".
+	MatchesStorageClasses []string
+
+	// NumNewerVersions is the condition matching objects with a number of newer versions.
+	//
+	// If the value is N, this condition is satisfied when there are at least N
+	// versions (including the live version) newer than this version of the
+	// object.
+	NumNewerVersions int64
+}
+
+func newBucket(b *raw.Bucket) *BucketAttrs {
+	if b == nil {
+		return nil
+	}
+	bucket := &BucketAttrs{
+		Name:              b.Name,
+		Location:          b.Location,
+		MetaGeneration:    b.Metageneration,
+		StorageClass:      b.StorageClass,
+		Created:           convertTime(b.TimeCreated),
+		VersioningEnabled: b.Versioning != nil && b.Versioning.Enabled,
+		Labels:            b.Labels,
+		RequesterPays:     b.Billing != nil && b.Billing.RequesterPays,
+		Lifecycle:         toLifecycle(b.Lifecycle),
+	}
+	acl := make([]ACLRule, len(b.Acl))
+	for i, rule := range b.Acl {
+		acl[i] = ACLRule{
+			Entity: ACLEntity(rule.Entity),
+			Role:   ACLRole(rule.Role),
+		}
+	}
+	bucket.ACL = acl
+	objACL := make([]ACLRule, len(b.DefaultObjectAcl))
+	for i, rule := range b.DefaultObjectAcl {
+		objACL[i] = ACLRule{
+			Entity: ACLEntity(rule.Entity),
+			Role:   ACLRole(rule.Role),
+		}
+	}
+	bucket.DefaultObjectACL = objACL
+	return bucket
+}
+
+// toRawBucket copies the editable attribute from b to the raw library's Bucket type.
+func (b *BucketAttrs) toRawBucket() *raw.Bucket {
+	var acl []*raw.BucketAccessControl
+	if len(b.ACL) > 0 {
+		acl = make([]*raw.BucketAccessControl, len(b.ACL))
+		for i, rule := range b.ACL {
+			acl[i] = &raw.BucketAccessControl{
+				Entity: string(rule.Entity),
+				Role:   string(rule.Role),
+			}
+		}
+	}
+	dACL := toRawObjectACL(b.DefaultObjectACL)
+	// Copy label map.
+	var labels map[string]string
+	if len(b.Labels) > 0 {
+		labels = make(map[string]string, len(b.Labels))
+		for k, v := range b.Labels {
+			labels[k] = v
+		}
+	}
+	// Ignore VersioningEnabled if it is false. This is OK because
+	// we only call this method when creating a bucket, and by default
+	// new buckets have versioning off.
+	var v *raw.BucketVersioning
+	if b.VersioningEnabled {
+		v = &raw.BucketVersioning{Enabled: true}
+	}
+	var bb *raw.BucketBilling
+	if b.RequesterPays {
+		bb = &raw.BucketBilling{RequesterPays: true}
+	}
+	return &raw.Bucket{
+		Name:             b.Name,
+		DefaultObjectAcl: dACL,
+		Location:         b.Location,
+		StorageClass:     b.StorageClass,
+		Acl:              acl,
+		Versioning:       v,
+		Labels:           labels,
+		Billing:          bb,
+		Lifecycle:        toRawLifecycle(b.Lifecycle),
+	}
+}
+
+type BucketAttrsToUpdate struct {
+	// VersioningEnabled, if set, updates whether the bucket uses versioning.
+	VersioningEnabled optional.Bool
+
+	// RequesterPays, if set, updates whether the bucket is a Requester Pays bucket.
+	RequesterPays optional.Bool
+
+	setLabels    map[string]string
+	deleteLabels map[string]bool
+}
+
+// SetLabel causes a label to be added or modified when ua is used
+// in a call to Bucket.Update.
+func (ua *BucketAttrsToUpdate) SetLabel(name, value string) {
+	if ua.setLabels == nil {
+		ua.setLabels = map[string]string{}
+	}
+	ua.setLabels[name] = value
+}
+
+// DeleteLabel causes a label to be deleted when ua is used in a
+// call to Bucket.Update.
+func (ua *BucketAttrsToUpdate) DeleteLabel(name string) {
+	if ua.deleteLabels == nil {
+		ua.deleteLabels = map[string]bool{}
+	}
+	ua.deleteLabels[name] = true
+}
+
+func (ua *BucketAttrsToUpdate) toRawBucket() *raw.Bucket {
+	rb := &raw.Bucket{}
+	if ua.VersioningEnabled != nil {
+		rb.Versioning = &raw.BucketVersioning{
+			Enabled:         optional.ToBool(ua.VersioningEnabled),
+			ForceSendFields: []string{"Enabled"},
+		}
+	}
+	if ua.RequesterPays != nil {
+		rb.Billing = &raw.BucketBilling{
+			RequesterPays:   optional.ToBool(ua.RequesterPays),
+			ForceSendFields: []string{"RequesterPays"},
+		}
+	}
+	if ua.setLabels != nil || ua.deleteLabels != nil {
+		rb.Labels = map[string]string{}
+		for k, v := range ua.setLabels {
+			rb.Labels[k] = v
+		}
+		if len(rb.Labels) == 0 && len(ua.deleteLabels) > 0 {
+			rb.ForceSendFields = append(rb.ForceSendFields, "Labels")
+		}
+		for l := range ua.deleteLabels {
+			rb.NullFields = append(rb.NullFields, "Labels."+l)
+		}
+	}
+	return rb
+}
+
+// If returns a new BucketHandle that applies a set of preconditions.
+// Preconditions already set on the BucketHandle are ignored.
+// Operations on the new handle will only occur if the preconditions are
+// satisfied. The only valid preconditions for buckets are MetagenerationMatch
+// and MetagenerationNotMatch.
+func (b *BucketHandle) If(conds BucketConditions) *BucketHandle {
+	b2 := *b
+	b2.conds = &conds
+	return &b2
+}
+
+// BucketConditions constrain bucket methods to act on specific metagenerations.
+//
+// The zero value is an empty set of constraints.
+type BucketConditions struct {
+	// MetagenerationMatch specifies that the bucket must have the given
+	// metageneration for the operation to occur.
+	// If MetagenerationMatch is zero, it has no effect.
+	MetagenerationMatch int64
+
+	// MetagenerationNotMatch specifies that the bucket must not have the given
+	// metageneration for the operation to occur.
+	// If MetagenerationNotMatch is zero, it has no effect.
+	MetagenerationNotMatch int64
+}
+
+func (c *BucketConditions) validate(method string) error {
+	if *c == (BucketConditions{}) {
+		return fmt.Errorf("storage: %s: empty conditions", method)
+	}
+	if c.MetagenerationMatch != 0 && c.MetagenerationNotMatch != 0 {
+		return fmt.Errorf("storage: %s: multiple conditions specified for metageneration", method)
+	}
+	return nil
+}
+
+// UserProject returns a new BucketHandle that passes the project ID as the user
+// project for all subsequent calls. A user project is required for all operations
+// on requester-pays buckets.
+func (b *BucketHandle) UserProject(projectID string) *BucketHandle {
+	b2 := *b
+	b2.userProject = projectID
+	b2.acl.userProject = projectID
+	b2.defaultObjectACL.userProject = projectID
+	return &b2
+}
+
+// applyBucketConds modifies the provided call using the conditions in conds.
+// call is something that quacks like a *raw.WhateverCall.
+func applyBucketConds(method string, conds *BucketConditions, call interface{}) error {
+	if conds == nil {
+		return nil
+	}
+	if err := conds.validate(method); err != nil {
+		return err
+	}
+	cval := reflect.ValueOf(call)
+	switch {
+	case conds.MetagenerationMatch != 0:
+		if !setConditionField(cval, "IfMetagenerationMatch", conds.MetagenerationMatch) {
+			return fmt.Errorf("storage: %s: ifMetagenerationMatch not supported", method)
+		}
+	case conds.MetagenerationNotMatch != 0:
+		if !setConditionField(cval, "IfMetagenerationNotMatch", conds.MetagenerationNotMatch) {
+			return fmt.Errorf("storage: %s: ifMetagenerationNotMatch not supported", method)
+		}
+	}
+	return nil
+}
+
+func toRawLifecycle(l Lifecycle) *raw.BucketLifecycle {
+	var rl raw.BucketLifecycle
+	if len(l.Rules) == 0 {
+		return nil
+	}
+	for _, r := range l.Rules {
+		rr := &raw.BucketLifecycleRule{
+			Action: &raw.BucketLifecycleRuleAction{
+				Type:         r.Action.Type,
+				StorageClass: r.Action.StorageClass,
+			},
+			Condition: &raw.BucketLifecycleRuleCondition{
+				Age:                 r.Condition.AgeInDays,
+				MatchesStorageClass: r.Condition.MatchesStorageClasses,
+				NumNewerVersions:    r.Condition.NumNewerVersions,
+			},
+		}
+
+		switch r.Condition.Liveness {
+		case LiveAndArchived:
+			rr.Condition.IsLive = nil
+		case Live:
+			rr.Condition.IsLive = googleapi.Bool(true)
+		case Archived:
+			rr.Condition.IsLive = googleapi.Bool(false)
+		}
+
+		if !r.Condition.CreatedBefore.IsZero() {
+			rr.Condition.CreatedBefore = r.Condition.CreatedBefore.Format(rfc3339Date)
+		}
+		rl.Rule = append(rl.Rule, rr)
+	}
+	return &rl
+}
+
+func toLifecycle(rl *raw.BucketLifecycle) Lifecycle {
+	var l Lifecycle
+	if rl == nil {
+		return l
+	}
+	for _, rr := range rl.Rule {
+		r := LifecycleRule{
+			Action: LifecycleAction{
+				Type:         rr.Action.Type,
+				StorageClass: rr.Action.StorageClass,
+			},
+			Condition: LifecycleCondition{
+				AgeInDays:             rr.Condition.Age,
+				MatchesStorageClasses: rr.Condition.MatchesStorageClass,
+				NumNewerVersions:      rr.Condition.NumNewerVersions,
+			},
+		}
+
+		switch {
+		case rr.Condition.IsLive == nil:
+			r.Condition.Liveness = LiveAndArchived
+		case *rr.Condition.IsLive == true:
+			r.Condition.Liveness = Live
+		case *rr.Condition.IsLive == false:
+			r.Condition.Liveness = Archived
+		}
+
+		if rr.Condition.CreatedBefore != "" {
+			r.Condition.CreatedBefore, _ = time.Parse(rfc3339Date, rr.Condition.CreatedBefore)
+		}
+	}
+	return l
+}
+
+// Objects returns an iterator over the objects in the bucket that match the Query q.
+// If q is nil, no filtering is done.
+func (b *BucketHandle) Objects(ctx context.Context, q *Query) *ObjectIterator {
+	it := &ObjectIterator{
+		ctx:    ctx,
+		bucket: b,
+	}
+	it.pageInfo, it.nextFunc = iterator.NewPageInfo(
+		it.fetch,
+		func() int { return len(it.items) },
+		func() interface{} { b := it.items; it.items = nil; return b })
+	if q != nil {
+		it.query = *q
+	}
+	return it
+}
+
+// An ObjectIterator is an iterator over ObjectAttrs.
+type ObjectIterator struct {
+	ctx      context.Context
+	bucket   *BucketHandle
+	query    Query
+	pageInfo *iterator.PageInfo
+	nextFunc func() error
+	items    []*ObjectAttrs
+}
+
+// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
+func (it *ObjectIterator) 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 iterator.Done, all subsequent
+// calls will return iterator.Done.
+//
+// If Query.Delimiter is non-empty, some of the ObjectAttrs returned by Next will
+// have a non-empty Prefix field, and a zero value for all other fields. These
+// represent prefixes.
+func (it *ObjectIterator) Next() (*ObjectAttrs, error) {
+	if err := it.nextFunc(); err != nil {
+		return nil, err
+	}
+	item := it.items[0]
+	it.items = it.items[1:]
+	return item, nil
+}
+
+func (it *ObjectIterator) fetch(pageSize int, pageToken string) (string, error) {
+	req := it.bucket.c.raw.Objects.List(it.bucket.name)
+	setClientHeader(req.Header())
+	req.Projection("full")
+	req.Delimiter(it.query.Delimiter)
+	req.Prefix(it.query.Prefix)
+	req.Versions(it.query.Versions)
+	req.PageToken(pageToken)
+	if it.bucket.userProject != "" {
+		req.UserProject(it.bucket.userProject)
+	}
+	if pageSize > 0 {
+		req.MaxResults(int64(pageSize))
+	}
+	var resp *raw.Objects
+	var err error
+	err = runWithRetry(it.ctx, func() error {
+		resp, err = req.Context(it.ctx).Do()
+		return err
+	})
+	if err != nil {
+		if e, ok := err.(*googleapi.Error); ok && e.Code == http.StatusNotFound {
+			err = ErrBucketNotExist
+		}
+		return "", err
+	}
+	for _, item := range resp.Items {
+		it.items = append(it.items, newObject(item))
+	}
+	for _, prefix := range resp.Prefixes {
+		it.items = append(it.items, &ObjectAttrs{Prefix: prefix})
+	}
+	return resp.NextPageToken, nil
+}
+
+// TODO(jbd): Add storage.buckets.update.
+
+// Buckets returns an iterator over the buckets in the project. You may
+// optionally set the iterator's Prefix field to restrict the list to buckets
+// whose names begin with the prefix. By default, all buckets in the project
+// are returned.
+func (c *Client) Buckets(ctx context.Context, projectID string) *BucketIterator {
+	it := &BucketIterator{
+		ctx:       ctx,
+		client:    c,
+		projectID: projectID,
+	}
+	it.pageInfo, it.nextFunc = iterator.NewPageInfo(
+		it.fetch,
+		func() int { return len(it.buckets) },
+		func() interface{} { b := it.buckets; it.buckets = nil; return b })
+	return it
+}
+
+// A BucketIterator is an iterator over BucketAttrs.
+type BucketIterator struct {
+	// Prefix restricts the iterator to buckets whose names begin with it.
+	Prefix string
+
+	ctx       context.Context
+	client    *Client
+	projectID string
+	buckets   []*BucketAttrs
+	pageInfo  *iterator.PageInfo
+	nextFunc  func() error
+}
+
+// Next returns the next result. Its second return value is iterator.Done if
+// there are no more results. Once Next returns iterator.Done, all subsequent
+// calls will return iterator.Done.
+func (it *BucketIterator) Next() (*BucketAttrs, error) {
+	if err := it.nextFunc(); err != nil {
+		return nil, err
+	}
+	b := it.buckets[0]
+	it.buckets = it.buckets[1:]
+	return b, nil
+}
+
+// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
+func (it *BucketIterator) PageInfo() *iterator.PageInfo { return it.pageInfo }
+
+func (it *BucketIterator) fetch(pageSize int, pageToken string) (string, error) {
+	req := it.client.raw.Buckets.List(it.projectID)
+	setClientHeader(req.Header())
+	req.Projection("full")
+	req.Prefix(it.Prefix)
+	req.PageToken(pageToken)
+	if pageSize > 0 {
+		req.MaxResults(int64(pageSize))
+	}
+	var resp *raw.Buckets
+	var err error
+	err = runWithRetry(it.ctx, func() error {
+		resp, err = req.Context(it.ctx).Do()
+		return err
+	})
+	if err != nil {
+		return "", err
+	}
+	for _, item := range resp.Items {
+		it.buckets = append(it.buckets, newBucket(item))
+	}
+	return resp.NextPageToken, nil
+}

vendor/cloud.google.com/go/storage/copy.go

@@ -0,0 +1,201 @@
+// Copyright 2016 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.
+
+package storage
+
+import (
+	"errors"
+	"fmt"
+
+	"golang.org/x/net/context"
+	raw "google.golang.org/api/storage/v1"
+)
+
+// CopierFrom creates a Copier that can copy src to dst.
+// You can immediately call Run on the returned Copier, or
+// you can configure it first.
+//
+// For Requester Pays buckets, the user project of dst is billed, unless it is empty,
+// in which case the user project of src is billed.
+func (dst *ObjectHandle) CopierFrom(src *ObjectHandle) *Copier {
+	return &Copier{dst: dst, src: src}
+}
+
+// A Copier copies a source object to a destination.
+type Copier struct {
+	// ObjectAttrs are optional attributes to set on the destination object.
+	// Any attributes must be initialized before any calls on the Copier. Nil
+	// or zero-valued attributes are ignored.
+	ObjectAttrs
+
+	// RewriteToken can be set before calling Run to resume a copy
+	// operation. After Run returns a non-nil error, RewriteToken will
+	// have been updated to contain the value needed to resume the copy.
+	RewriteToken string
+
+	// ProgressFunc can be used to monitor the progress of a multi-RPC copy
+	// operation. If ProgressFunc is not nil and copying requires multiple
+	// calls to the underlying service (see
+	// https://cloud.google.com/storage/docs/json_api/v1/objects/rewrite), then
+	// ProgressFunc will be invoked after each call with the number of bytes of
+	// content copied so far and the total size in bytes of the source object.
+	//
+	// ProgressFunc is intended to make upload progress available to the
+	// application. For example, the implementation of ProgressFunc may update
+	// a progress bar in the application's UI, or log the result of
+	// float64(copiedBytes)/float64(totalBytes).
+	//
+	// ProgressFunc should return quickly without blocking.
+	ProgressFunc func(copiedBytes, totalBytes uint64)
+
+	dst, src *ObjectHandle
+}
+
+// Run performs the copy.
+func (c *Copier) Run(ctx context.Context) (*ObjectAttrs, error) {
+	if err := c.src.validate(); err != nil {
+		return nil, err
+	}
+	if err := c.dst.validate(); err != nil {
+		return nil, err
+	}
+	// Convert destination attributes to raw form, omitting the bucket.
+	// If the bucket is included but name or content-type aren't, the service
+	// returns a 400 with "Required" as the only message. Omitting the bucket
+	// does not cause any problems.
+	rawObject := c.ObjectAttrs.toRawObject("")
+	for {
+		res, err := c.callRewrite(ctx, rawObject)
+		if err != nil {
+			return nil, err
+		}
+		if c.ProgressFunc != nil {
+			c.ProgressFunc(uint64(res.TotalBytesRewritten), uint64(res.ObjectSize))
+		}
+		if res.Done { // Finished successfully.
+			return newObject(res.Resource), nil
+		}
+	}
+}
+
+func (c *Copier) callRewrite(ctx context.Context, rawObj *raw.Object) (*raw.RewriteResponse, error) {
+	call := c.dst.c.raw.Objects.Rewrite(c.src.bucket, c.src.object, c.dst.bucket, c.dst.object, rawObj)
+
+	call.Context(ctx).Projection("full")
+	if c.RewriteToken != "" {
+		call.RewriteToken(c.RewriteToken)
+	}
+	if err := applyConds("Copy destination", c.dst.gen, c.dst.conds, call); err != nil {
+		return nil, err
+	}
+	if c.dst.userProject != "" {
+		call.UserProject(c.dst.userProject)
+	} else if c.src.userProject != "" {
+		call.UserProject(c.src.userProject)
+	}
+	if err := applySourceConds(c.src.gen, c.src.conds, call); err != nil {
+		return nil, err
+	}
+	if err := setEncryptionHeaders(call.Header(), c.dst.encryptionKey, false); err != nil {
+		return nil, err
+	}
+	if err := setEncryptionHeaders(call.Header(), c.src.encryptionKey, true); err != nil {
+		return nil, err
+	}
+	var res *raw.RewriteResponse
+	var err error
+	setClientHeader(call.Header())
+	err = runWithRetry(ctx, func() error { res, err = call.Do(); return err })
+	if err != nil {
+		return nil, err
+	}
+	c.RewriteToken = res.RewriteToken
+	return res, nil
+}
+
+// ComposerFrom creates a Composer that can compose srcs into dst.
+// You can immediately call Run on the returned Composer, or you can
+// configure it first.
+//
+// The encryption key for the destination object will be used to decrypt all
+// source objects and encrypt the destination object. It is an error
+// to specify an encryption key for any of the source objects.
+func (dst *ObjectHandle) ComposerFrom(srcs ...*ObjectHandle) *Composer {
+	return &Composer{dst: dst, srcs: srcs}
+}
+
+// A Composer composes source objects into a destination object.
+//
+// For Requester Pays buckets, the user project of dst is billed.
+type Composer struct {
+	// ObjectAttrs are optional attributes to set on the destination object.
+	// Any attributes must be initialized before any calls on the Composer. Nil
+	// or zero-valued attributes are ignored.
+	ObjectAttrs
+
+	dst  *ObjectHandle
+	srcs []*ObjectHandle
+}
+
+// Run performs the compose operation.
+func (c *Composer) Run(ctx context.Context) (*ObjectAttrs, error) {
+	if err := c.dst.validate(); err != nil {
+		return nil, err
+	}
+	if len(c.srcs) == 0 {
+		return nil, errors.New("storage: at least one source object must be specified")
+	}
+
+	req := &raw.ComposeRequest{}
+	// Compose requires a non-empty Destination, so we always set it,
+	// even if the caller-provided ObjectAttrs is the zero value.
+	req.Destination = c.ObjectAttrs.toRawObject(c.dst.bucket)
+	for _, src := range c.srcs {
+		if err := src.validate(); err != nil {
+			return nil, err
+		}
+		if src.bucket != c.dst.bucket {
+			return nil, fmt.Errorf("storage: all source objects must be in bucket %q, found %q", c.dst.bucket, src.bucket)
+		}
+		if src.encryptionKey != nil {
+			return nil, fmt.Errorf("storage: compose source %s.%s must not have encryption key", src.bucket, src.object)
+		}
+		srcObj := &raw.ComposeRequestSourceObjects{
+			Name: src.object,
+		}
+		if err := applyConds("ComposeFrom source", src.gen, src.conds, composeSourceObj{srcObj}); err != nil {
+			return nil, err
+		}
+		req.SourceObjects = append(req.SourceObjects, srcObj)
+	}
+
+	call := c.dst.c.raw.Objects.Compose(c.dst.bucket, c.dst.object, req).Context(ctx)
+	if err := applyConds("ComposeFrom destination", c.dst.gen, c.dst.conds, call); err != nil {
+		return nil, err
+	}
+	if c.dst.userProject != "" {
+		call.UserProject(c.dst.userProject)
+	}
+	if err := setEncryptionHeaders(call.Header(), c.dst.encryptionKey, false); err != nil {
+		return nil, err
+	}
+	var obj *raw.Object
+	var err error
+	setClientHeader(call.Header())
+	err = runWithRetry(ctx, func() error { obj, err = call.Do(); return err })
+	if err != nil {
+		return nil, err
+	}
+	return newObject(obj), nil
+}

vendor/cloud.google.com/go/storage/doc.go

@@ -0,0 +1,161 @@
+// Copyright 2016 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.
+
+/*
+Package storage provides an easy way to work with Google Cloud Storage.
+Google Cloud Storage stores data in named objects, which are grouped into buckets.
+
+More information about Google Cloud Storage is available at
+https://cloud.google.com/storage/docs.
+
+All of the methods of this package use exponential backoff to retry calls
+that fail with certain errors, as described in
+https://cloud.google.com/storage/docs/exponential-backoff.
+
+Note: This package is in beta.  Some backwards-incompatible changes may occur.
+
+
+Creating a Client
+
+To start working with this package, create a client:
+
+    ctx := context.Background()
+    client, err := storage.NewClient(ctx)
+    if err != nil {
+        // TODO: Handle error.
+    }
+
+Buckets
+
+A Google Cloud Storage bucket is a collection of objects. To work with a
+bucket, make a bucket handle:
+
+    bkt := client.Bucket(bucketName)
+
+A handle is a reference to a bucket. You can have a handle even if the
+bucket doesn't exist yet. To create a bucket in Google Cloud Storage,
+call Create on the handle:
+
+    if err := bkt.Create(ctx, projectID, nil); err != nil {
+        // TODO: Handle error.
+    }
+
+Note that although buckets are associated with projects, bucket names are
+global across all projects.
+
+Each bucket has associated metadata, represented in this package by
+BucketAttrs. The third argument to BucketHandle.Create allows you to set
+the intial BucketAttrs of a bucket. To retrieve a bucket's attributes, use
+Attrs:
+
+    attrs, err := bkt.Attrs(ctx)
+    if err != nil {
+        // TODO: Handle error.
+    }
+    fmt.Printf("bucket %s, created at %s, is located in %s with storage class %s\n",
+        attrs.Name, attrs.Created, attrs.Location, attrs.StorageClass)
+
+Objects
+
+An object holds arbitrary data as a sequence of bytes, like a file. You
+refer to objects using a handle, just as with buckets. You can use the
+standard Go io.Reader and io.Writer interfaces to read and write
+object data:
+
+    obj := bkt.Object("data")
+    // Write something to obj.
+    // w implements io.Writer.
+    w := obj.NewWriter(ctx)
+    // Write some text to obj. This will overwrite whatever is there.
+    if _, err := fmt.Fprintf(w, "This object contains text.\n"); err != nil {
+        // TODO: Handle error.
+    }
+    // Close, just like writing a file.
+    if err := w.Close(); err != nil {
+        // TODO: Handle error.
+    }
+
+    // Read it back.
+    r, err := obj.NewReader(ctx)
+    if err != nil {
+        // TODO: Handle error.
+    }
+    defer r.Close()
+    if _, err := io.Copy(os.Stdout, r); err != nil {
+        // TODO: Handle error.
+    }
+    // Prints "This object contains text."
+
+Objects also have attributes, which you can fetch with Attrs:
+
+    objAttrs, err := obj.Attrs(ctx)
+    if err != nil {
+        // TODO: Handle error.
+    }
+    fmt.Printf("object %s has size %d and can be read using %s\n",
+        objAttrs.Name, objAttrs.Size, objAttrs.MediaLink)
+
+ACLs
+
+Both objects and buckets have ACLs (Access Control Lists). An ACL is a list of
+ACLRules, each of which specifies the role of a user, group or project. ACLs
+are suitable for fine-grained control, but you may prefer using IAM to control
+access at the project level (see
+https://cloud.google.com/storage/docs/access-control/iam).
+
+To list the ACLs of a bucket or object, obtain an ACLHandle and call its List method:
+
+    acls, err := obj.ACL().List(ctx)
+    if err != nil {
+        // TODO: Handle error.
+    }
+    for _, rule := range acls {
+        fmt.Printf("%s has role %s\n", rule.Entity, rule.Role)
+    }
+
+You can also set and delete ACLs.
+
+Conditions
+
+Every object has a generation and a metageneration. The generation changes
+whenever the content changes, and the metageneration changes whenever the
+metadata changes. Conditions let you check these values before an operation;
+the operation only executes if the conditions match. You can use conditions to
+prevent race conditions in read-modify-write operations.
+
+For example, say you've read an object's metadata into objAttrs. Now
+you want to write to that object, but only if its contents haven't changed
+since you read it. Here is how to express that:
+
+    w = obj.If(storage.Conditions{GenerationMatch: objAttrs.Generation}).NewWriter(ctx)
+    // Proceed with writing as above.
+
+Signed URLs
+
+You can obtain a URL that lets anyone read or write an object for a limited time.
+You don't need to create a client to do this. See the documentation of
+SignedURL for details.
+
+    url, err := storage.SignedURL(bucketName, "shared-object", opts)
+    if err != nil {
+        // TODO: Handle error.
+    }
+    fmt.Println(url)
+
+Authentication
+
+See examples of authorization and authentication at
+https://godoc.org/cloud.google.com/go#pkg-examples.
+*/
+package storage // import "cloud.google.com/go/storage"

vendor/cloud.google.com/go/storage/go110.go

@@ -0,0 +1,30 @@
+// 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.
+
+// +build go1.10
+
+package storage
+
+import "google.golang.org/api/googleapi"
+
+func shouldRetry(err error) bool {
+	switch e := err.(type) {
+	case *googleapi.Error:
+		// Retry on 429 and 5xx, according to
+		// https://cloud.google.com/storage/docs/exponential-backoff.
+		return e.Code == 429 || (e.Code >= 500 && e.Code < 600)
+	default:
+		return false
+	}
+}

vendor/cloud.google.com/go/storage/go17.go

@@ -0,0 +1,26 @@
+// 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.
+
+// +build go1.7
+
+package storage
+
+import (
+	"context"
+	"net/http"
+)
+
+func withContext(r *http.Request, ctx context.Context) *http.Request {
+	return r.WithContext(ctx)
+}

vendor/cloud.google.com/go/storage/iam.go

@@ -0,0 +1,108 @@
+// 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.
+
+package storage
+
+import (
+	"cloud.google.com/go/iam"
+	"golang.org/x/net/context"
+	raw "google.golang.org/api/storage/v1"
+	iampb "google.golang.org/genproto/googleapis/iam/v1"
+)
+
+// IAM provides access to IAM access control for the bucket.
+func (b *BucketHandle) IAM() *iam.Handle {
+	return iam.InternalNewHandleClient(&iamClient{raw: b.c.raw}, b.name)
+}
+
+// iamClient implements the iam.client interface.
+type iamClient struct {
+	raw *raw.Service
+}
+
+func (c *iamClient) Get(ctx context.Context, resource string) (*iampb.Policy, error) {
+	req := c.raw.Buckets.GetIamPolicy(resource)
+	setClientHeader(req.Header())
+	var rp *raw.Policy
+	var err error
+	err = runWithRetry(ctx, func() error {
+		rp, err = req.Context(ctx).Do()
+		return err
+	})
+	if err != nil {
+		return nil, err
+	}
+	return iamFromStoragePolicy(rp), nil
+}
+
+func (c *iamClient) Set(ctx context.Context, resource string, p *iampb.Policy) error {
+	rp := iamToStoragePolicy(p)
+	req := c.raw.Buckets.SetIamPolicy(resource, rp)
+	setClientHeader(req.Header())
+	return runWithRetry(ctx, func() error {
+		_, err := req.Context(ctx).Do()
+		return err
+	})
+}
+
+func (c *iamClient) Test(ctx context.Context, resource string, perms []string) ([]string, error) {
+	req := c.raw.Buckets.TestIamPermissions(resource, perms)
+	setClientHeader(req.Header())
+	var res *raw.TestIamPermissionsResponse
+	var err error
+	err = runWithRetry(ctx, func() error {
+		res, err = req.Context(ctx).Do()
+		return err
+	})
+	if err != nil {
+		return nil, err
+	}
+	return res.Permissions, nil
+}
+
+func iamToStoragePolicy(ip *iampb.Policy) *raw.Policy {
+	return &raw.Policy{
+		Bindings: iamToStorageBindings(ip.Bindings),
+		Etag:     string(ip.Etag),
+	}
+}
+
+func iamToStorageBindings(ibs []*iampb.Binding) []*raw.PolicyBindings {
+	var rbs []*raw.PolicyBindings
+	for _, ib := range ibs {
+		rbs = append(rbs, &raw.PolicyBindings{
+			Role:    ib.Role,
+			Members: ib.Members,
+		})
+	}
+	return rbs
+}
+
+func iamFromStoragePolicy(rp *raw.Policy) *iampb.Policy {
+	return &iampb.Policy{
+		Bindings: iamFromStorageBindings(rp.Bindings),
+		Etag:     []byte(rp.Etag),
+	}
+}
+
+func iamFromStorageBindings(rbs []*raw.PolicyBindings) []*iampb.Binding {
+	var ibs []*iampb.Binding
+	for _, rb := range rbs {
+		ibs = append(ibs, &iampb.Binding{
+			Role:    rb.Role,
+			Members: rb.Members,
+		})
+	}
+	return ibs
+}

vendor/cloud.google.com/go/storage/invoke.go

@@ -0,0 +1,36 @@
+// Copyright 2014 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.
+
+package storage
+
+import (
+	"cloud.google.com/go/internal"
+	gax "github.com/googleapis/gax-go"
+	"golang.org/x/net/context"
+)
+
+// runWithRetry calls the function until it returns nil or a non-retryable error, or
+// the context is done.
+func runWithRetry(ctx context.Context, call func() error) error {
+	return internal.Retry(ctx, gax.Backoff{}, func() (stop bool, err error) {
+		err = call()
+		if err == nil {
+			return true, nil
+		}
+		if shouldRetry(err) {
+			return false, nil
+		}
+		return true, err
+	})
+}

vendor/cloud.google.com/go/storage/not_go110.go

@@ -0,0 +1,40 @@
+// 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.
+
+// +build !go1.10
+
+package storage
+
+import (
+	"net/url"
+	"strings"
+
+	"google.golang.org/api/googleapi"
+)
+
+func shouldRetry(err error) bool {
+	switch e := err.(type) {
+	case *googleapi.Error:
+		// Retry on 429 and 5xx, according to
+		// https://cloud.google.com/storage/docs/exponential-backoff.
+		return e.Code == 429 || (e.Code >= 500 && e.Code < 600)
+	case *url.Error:
+		// Retry on REFUSED_STREAM.
+		// Unfortunately the error type is unexported, so we resort to string
+		// matching.
+		return strings.Contains(e.Error(), "REFUSED_STREAM")
+	default:
+		return false
+	}
+}

vendor/cloud.google.com/go/storage/not_go17.go

@@ -0,0 +1,26 @@
+// 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.
+
+// +build !go1.7
+
+package storage
+
+import (
+	"net/http"
+)
+
+func withContext(r *http.Request, _ interface{}) *http.Request {
+	// In Go 1.6 and below, ignore the context.
+	return r
+}

vendor/cloud.google.com/go/storage/reader.go

@@ -0,0 +1,80 @@
+// Copyright 2016 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.
+
+package storage
+
+import (
+	"fmt"
+	"hash/crc32"
+	"io"
+)
+
+var crc32cTable = crc32.MakeTable(crc32.Castagnoli)
+
+// Reader reads a Cloud Storage object.
+// It implements io.Reader.
+type Reader struct {
+	body         io.ReadCloser
+	remain, size int64
+	contentType  string
+	cacheControl string
+	checkCRC     bool   // should we check the CRC?
+	wantCRC      uint32 // the CRC32c value the server sent in the header
+	gotCRC       uint32 // running crc
+}
+
+// Close closes the Reader. It must be called when done reading.
+func (r *Reader) Close() error {
+	return r.body.Close()
+}
+
+func (r *Reader) Read(p []byte) (int, error) {
+	n, err := r.body.Read(p)
+	if r.remain != -1 {
+		r.remain -= int64(n)
+	}
+	if r.checkCRC {
+		r.gotCRC = crc32.Update(r.gotCRC, crc32cTable, p[:n])
+		// Check CRC here. It would be natural to check it in Close, but
+		// everybody defers Close on the assumption that it doesn't return
+		// anything worth looking at.
+		if r.remain == 0 && r.gotCRC != r.wantCRC {
+			return n, fmt.Errorf("storage: bad CRC on read: got %d, want %d",
+				r.gotCRC, r.wantCRC)
+		}
+	}
+	return n, err
+}
+
+// Size returns the size of the object in bytes.
+// The returned value is always the same and is not affected by
+// calls to Read or Close.
+func (r *Reader) Size() int64 {
+	return r.size
+}
+
+// Remain returns the number of bytes left to read, or -1 if unknown.
+func (r *Reader) Remain() int64 {
+	return r.remain
+}
+
+// ContentType returns the content type of the object.
+func (r *Reader) ContentType() string {
+	return r.contentType
+}
+
+// CacheControl returns the cache control of the object.
+func (r *Reader) CacheControl() string {
+	return r.cacheControl
+}

vendor/cloud.google.com/go/storage/writer.go

@@ -0,0 +1,201 @@
+// Copyright 2014 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.
+
+package storage
+
+import (
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"io"
+	"unicode/utf8"
+
+	"golang.org/x/net/context"
+	"google.golang.org/api/googleapi"
+	raw "google.golang.org/api/storage/v1"
+)
+
+// A Writer writes a Cloud Storage object.
+type Writer struct {
+	// ObjectAttrs are optional attributes to set on the object. Any attributes
+	// must be initialized before the first Write call. Nil or zero-valued
+	// attributes are ignored.
+	ObjectAttrs
+
+	// SendCRC specifies whether to transmit a CRC32C field. It should be set
+	// to true in addition to setting the Writer's CRC32C field, because zero
+	// is a valid CRC and normally a zero would not be transmitted.
+	// If a CRC32C is sent, and the data written does not match the checksum,
+	// the write will be rejected.
+	SendCRC32C bool
+
+	// ChunkSize controls the maximum number of bytes of the object that the
+	// Writer will attempt to send to the server in a single request. Objects
+	// smaller than the size will be sent in a single request, while larger
+	// objects will be split over multiple requests. The size will be rounded up
+	// to the nearest multiple of 256K. If zero, chunking will be disabled and
+	// the object will be uploaded in a single request.
+	//
+	// ChunkSize will default to a reasonable value. Any custom configuration
+	// must be done before the first Write call.
+	ChunkSize int
+
+	// ProgressFunc can be used to monitor the progress of a large write.
+	// operation. If ProgressFunc is not nil and writing requires multiple
+	// calls to the underlying service (see
+	// https://cloud.google.com/storage/docs/json_api/v1/how-tos/resumable-upload),
+	// then ProgressFunc will be invoked after each call with the number of bytes of
+	// content copied so far.
+	//
+	// ProgressFunc should return quickly without blocking.
+	ProgressFunc func(int64)
+
+	ctx context.Context
+	o   *ObjectHandle
+
+	opened bool
+	pw     *io.PipeWriter
+
+	donec chan struct{} // closed after err and obj are set.
+	err   error
+	obj   *ObjectAttrs
+}
+
+func (w *Writer) open() error {
+	attrs := w.ObjectAttrs
+	// Check the developer didn't change the object Name (this is unfortunate, but
+	// we don't want to store an object under the wrong name).
+	if attrs.Name != w.o.object {
+		return fmt.Errorf("storage: Writer.Name %q does not match object name %q", attrs.Name, w.o.object)
+	}
+	if !utf8.ValidString(attrs.Name) {
+		return fmt.Errorf("storage: object name %q is not valid UTF-8", attrs.Name)
+	}
+	pr, pw := io.Pipe()
+	w.pw = pw
+	w.opened = true
+
+	if w.ChunkSize < 0 {
+		return errors.New("storage: Writer.ChunkSize must be non-negative")
+	}
+	mediaOpts := []googleapi.MediaOption{
+		googleapi.ChunkSize(w.ChunkSize),
+	}
+	if c := attrs.ContentType; c != "" {
+		mediaOpts = append(mediaOpts, googleapi.ContentType(c))
+	}
+
+	go func() {
+		defer close(w.donec)
+
+		rawObj := attrs.toRawObject(w.o.bucket)
+		if w.SendCRC32C {
+			rawObj.Crc32c = encodeUint32(attrs.CRC32C)
+		}
+		if w.MD5 != nil {
+			rawObj.Md5Hash = base64.StdEncoding.EncodeToString(w.MD5)
+		}
+		call := w.o.c.raw.Objects.Insert(w.o.bucket, rawObj).
+			Media(pr, mediaOpts...).
+			Projection("full").
+			Context(w.ctx)
+		if w.ProgressFunc != nil {
+			call.ProgressUpdater(func(n, _ int64) { w.ProgressFunc(n) })
+		}
+		if err := setEncryptionHeaders(call.Header(), w.o.encryptionKey, false); err != nil {
+			w.err = err
+			pr.CloseWithError(w.err)
+			return
+		}
+		var resp *raw.Object
+		err := applyConds("NewWriter", w.o.gen, w.o.conds, call)
+		if err == nil {
+			if w.o.userProject != "" {
+				call.UserProject(w.o.userProject)
+			}
+			setClientHeader(call.Header())
+			// If the chunk size is zero, then no chunking is done on the Reader,
+			// which means we cannot retry: the first call will read the data, and if
+			// it fails, there is no way to re-read.
+			if w.ChunkSize == 0 {
+				resp, err = call.Do()
+			} else {
+				// We will only retry here if the initial POST, which obtains a URI for
+				// the resumable upload, fails with a retryable error. The upload itself
+				// has its own retry logic.
+				err = runWithRetry(w.ctx, func() error {
+					var err2 error
+					resp, err2 = call.Do()
+					return err2
+				})
+			}
+		}
+		if err != nil {
+			w.err = err
+			pr.CloseWithError(w.err)
+			return
+		}
+		w.obj = newObject(resp)
+	}()
+	return nil
+}
+
+// Write appends to w. It implements the io.Writer interface.
+//
+// Since writes happen asynchronously, Write may return a nil
+// error even though the write failed (or will fail). Always
+// use the error returned from Writer.Close to determine if
+// the upload was successful.
+func (w *Writer) Write(p []byte) (n int, err error) {
+	if w.err != nil {
+		return 0, w.err
+	}
+	if !w.opened {
+		if err := w.open(); err != nil {
+			return 0, err
+		}
+	}
+	return w.pw.Write(p)
+}
+
+// Close completes the write operation and flushes any buffered data.
+// If Close doesn't return an error, metadata about the written object
+// can be retrieved by calling Attrs.
+func (w *Writer) Close() error {
+	if !w.opened {
+		if err := w.open(); err != nil {
+			return err
+		}
+	}
+	if err := w.pw.Close(); err != nil {
+		return err
+	}
+	<-w.donec
+	return w.err
+}
+
+// CloseWithError aborts the write operation with the provided error.
+// CloseWithError always returns nil.
+func (w *Writer) CloseWithError(err error) error {
+	if !w.opened {
+		return nil
+	}
+	return w.pw.CloseWithError(err)
+}
+
+// Attrs returns metadata about a successfully-written object.
+// It's only valid to call it after Close returns nil.
+func (w *Writer) Attrs() *ObjectAttrs {
+	return w.obj
+}

vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/Makefile

@@ -0,0 +1,37 @@
+# Go support for Protocol Buffers - Google's data interchange format
+#
+# Copyright 2010 The Go Authors.  All rights reserved.
+# https://github.com/golang/protobuf
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Not stored here, but descriptor.proto is in https://github.com/google/protobuf/
+# at src/google/protobuf/descriptor.proto
+regenerate:
+	@echo WARNING! THIS RULE IS PROBABLY NOT RIGHT FOR YOUR INSTALLATION
+	cp $(HOME)/src/protobuf/include/google/protobuf/descriptor.proto .
+	protoc --go_out=../../../../.. -I$(HOME)/src/protobuf/include $(HOME)/src/protobuf/include/google/protobuf/descriptor.proto

vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.proto

@@ -0,0 +1,849 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: kenton@google.com (Kenton Varda)
+//  Based on original Protocol Buffers design by
+//  Sanjay Ghemawat, Jeff Dean, and others.
+//
+// The messages in this file describe the definitions found in .proto files.
+// A valid .proto file can be translated directly to a FileDescriptorProto
+// without any other information (e.g. without reading its imports).
+
+
+syntax = "proto2";
+
+package google.protobuf;
+option go_package = "github.com/golang/protobuf/protoc-gen-go/descriptor;descriptor";
+option java_package = "com.google.protobuf";
+option java_outer_classname = "DescriptorProtos";
+option csharp_namespace = "Google.Protobuf.Reflection";
+option objc_class_prefix = "GPB";
+
+// descriptor.proto must be optimized for speed because reflection-based
+// algorithms don't work during bootstrapping.
+option optimize_for = SPEED;
+
+// The protocol compiler can output a FileDescriptorSet containing the .proto
+// files it parses.
+message FileDescriptorSet {
+  repeated FileDescriptorProto file = 1;
+}
+
+// Describes a complete .proto file.
+message FileDescriptorProto {
+  optional string name = 1;       // file name, relative to root of source tree
+  optional string package = 2;    // e.g. "foo", "foo.bar", etc.
+
+  // Names of files imported by this file.
+  repeated string dependency = 3;
+  // Indexes of the public imported files in the dependency list above.
+  repeated int32 public_dependency = 10;
+  // Indexes of the weak imported files in the dependency list.
+  // For Google-internal migration only. Do not use.
+  repeated int32 weak_dependency = 11;
+
+  // All top-level definitions in this file.
+  repeated DescriptorProto message_type = 4;
+  repeated EnumDescriptorProto enum_type = 5;
+  repeated ServiceDescriptorProto service = 6;
+  repeated FieldDescriptorProto extension = 7;
+
+  optional FileOptions options = 8;
+
+  // This field contains optional information about the original source code.
+  // You may safely remove this entire field without harming runtime
+  // functionality of the descriptors -- the information is needed only by
+  // development tools.
+  optional SourceCodeInfo source_code_info = 9;
+
+  // The syntax of the proto file.
+  // The supported values are "proto2" and "proto3".
+  optional string syntax = 12;
+}
+
+// Describes a message type.
+message DescriptorProto {
+  optional string name = 1;
+
+  repeated FieldDescriptorProto field = 2;
+  repeated FieldDescriptorProto extension = 6;
+
+  repeated DescriptorProto nested_type = 3;
+  repeated EnumDescriptorProto enum_type = 4;
+
+  message ExtensionRange {
+    optional int32 start = 1;
+    optional int32 end = 2;
+
+    optional ExtensionRangeOptions options = 3;
+  }
+  repeated ExtensionRange extension_range = 5;
+
+  repeated OneofDescriptorProto oneof_decl = 8;
+
+  optional MessageOptions options = 7;
+
+  // Range of reserved tag numbers. Reserved tag numbers may not be used by
+  // fields or extension ranges in the same message. Reserved ranges may
+  // not overlap.
+  message ReservedRange {
+    optional int32 start = 1; // Inclusive.
+    optional int32 end = 2;   // Exclusive.
+  }
+  repeated ReservedRange reserved_range = 9;
+  // Reserved field names, which may not be used by fields in the same message.
+  // A given name may only be reserved once.
+  repeated string reserved_name = 10;
+}
+
+message ExtensionRangeOptions {
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+// Describes a field within a message.
+message FieldDescriptorProto {
+  enum Type {
+    // 0 is reserved for errors.
+    // Order is weird for historical reasons.
+    TYPE_DOUBLE         = 1;
+    TYPE_FLOAT          = 2;
+    // Not ZigZag encoded.  Negative numbers take 10 bytes.  Use TYPE_SINT64 if
+    // negative values are likely.
+    TYPE_INT64          = 3;
+    TYPE_UINT64         = 4;
+    // Not ZigZag encoded.  Negative numbers take 10 bytes.  Use TYPE_SINT32 if
+    // negative values are likely.
+    TYPE_INT32          = 5;
+    TYPE_FIXED64        = 6;
+    TYPE_FIXED32        = 7;
+    TYPE_BOOL           = 8;
+    TYPE_STRING         = 9;
+    // Tag-delimited aggregate.
+    // Group type is deprecated and not supported in proto3. However, Proto3
+    // implementations should still be able to parse the group wire format and
+    // treat group fields as unknown fields.
+    TYPE_GROUP          = 10;
+    TYPE_MESSAGE        = 11;  // Length-delimited aggregate.
+
+    // New in version 2.
+    TYPE_BYTES          = 12;
+    TYPE_UINT32         = 13;
+    TYPE_ENUM           = 14;
+    TYPE_SFIXED32       = 15;
+    TYPE_SFIXED64       = 16;
+    TYPE_SINT32         = 17;  // Uses ZigZag encoding.
+    TYPE_SINT64         = 18;  // Uses ZigZag encoding.
+  };
+
+  enum Label {
+    // 0 is reserved for errors
+    LABEL_OPTIONAL      = 1;
+    LABEL_REQUIRED      = 2;
+    LABEL_REPEATED      = 3;
+  };
+
+  optional string name = 1;
+  optional int32 number = 3;
+  optional Label label = 4;
+
+  // If type_name is set, this need not be set.  If both this and type_name
+  // are set, this must be one of TYPE_ENUM, TYPE_MESSAGE or TYPE_GROUP.
+  optional Type type = 5;
+
+  // For message and enum types, this is the name of the type.  If the name
+  // starts with a '.', it is fully-qualified.  Otherwise, C++-like scoping
+  // rules are used to find the type (i.e. first the nested types within this
+  // message are searched, then within the parent, on up to the root
+  // namespace).
+  optional string type_name = 6;
+
+  // For extensions, this is the name of the type being extended.  It is
+  // resolved in the same manner as type_name.
+  optional string extendee = 2;
+
+  // For numeric types, contains the original text representation of the value.
+  // For booleans, "true" or "false".
+  // For strings, contains the default text contents (not escaped in any way).
+  // For bytes, contains the C escaped value.  All bytes >= 128 are escaped.
+  // TODO(kenton):  Base-64 encode?
+  optional string default_value = 7;
+
+  // If set, gives the index of a oneof in the containing type's oneof_decl
+  // list.  This field is a member of that oneof.
+  optional int32 oneof_index = 9;
+
+  // JSON name of this field. The value is set by protocol compiler. If the
+  // user has set a "json_name" option on this field, that option's value
+  // will be used. Otherwise, it's deduced from the field's name by converting
+  // it to camelCase.
+  optional string json_name = 10;
+
+  optional FieldOptions options = 8;
+}
+
+// Describes a oneof.
+message OneofDescriptorProto {
+  optional string name = 1;
+  optional OneofOptions options = 2;
+}
+
+// Describes an enum type.
+message EnumDescriptorProto {
+  optional string name = 1;
+
+  repeated EnumValueDescriptorProto value = 2;
+
+  optional EnumOptions options = 3;
+}
+
+// Describes a value within an enum.
+message EnumValueDescriptorProto {
+  optional string name = 1;
+  optional int32 number = 2;
+
+  optional EnumValueOptions options = 3;
+}
+
+// Describes a service.
+message ServiceDescriptorProto {
+  optional string name = 1;
+  repeated MethodDescriptorProto method = 2;
+
+  optional ServiceOptions options = 3;
+}
+
+// Describes a method of a service.
+message MethodDescriptorProto {
+  optional string name = 1;
+
+  // Input and output type names.  These are resolved in the same way as
+  // FieldDescriptorProto.type_name, but must refer to a message type.
+  optional string input_type = 2;
+  optional string output_type = 3;
+
+  optional MethodOptions options = 4;
+
+  // Identifies if client streams multiple client messages
+  optional bool client_streaming = 5 [default=false];
+  // Identifies if server streams multiple server messages
+  optional bool server_streaming = 6 [default=false];
+}
+
+
+// ===================================================================
+// Options
+
+// Each of the definitions above may have "options" attached.  These are
+// just annotations which may cause code to be generated slightly differently
+// or may contain hints for code that manipulates protocol messages.
+//
+// Clients may define custom options as extensions of the *Options messages.
+// These extensions may not yet be known at parsing time, so the parser cannot
+// store the values in them.  Instead it stores them in a field in the *Options
+// message called uninterpreted_option. This field must have the same name
+// across all *Options messages. We then use this field to populate the
+// extensions when we build a descriptor, at which point all protos have been
+// parsed and so all extensions are known.
+//
+// Extension numbers for custom options may be chosen as follows:
+// * For options which will only be used within a single application or
+//   organization, or for experimental options, use field numbers 50000
+//   through 99999.  It is up to you to ensure that you do not use the
+//   same number for multiple options.
+// * For options which will be published and used publicly by multiple
+//   independent entities, e-mail protobuf-global-extension-registry@google.com
+//   to reserve extension numbers. Simply provide your project name (e.g.
+//   Objective-C plugin) and your project website (if available) -- there's no
+//   need to explain how you intend to use them. Usually you only need one
+//   extension number. You can declare multiple options with only one extension
+//   number by putting them in a sub-message. See the Custom Options section of
+//   the docs for examples:
+//   https://developers.google.com/protocol-buffers/docs/proto#options
+//   If this turns out to be popular, a web service will be set up
+//   to automatically assign option numbers.
+
+
+message FileOptions {
+
+  // Sets the Java package where classes generated from this .proto will be
+  // placed.  By default, the proto package is used, but this is often
+  // inappropriate because proto packages do not normally start with backwards
+  // domain names.
+  optional string java_package = 1;
+
+
+  // If set, all the classes from the .proto file are wrapped in a single
+  // outer class with the given name.  This applies to both Proto1
+  // (equivalent to the old "--one_java_file" option) and Proto2 (where
+  // a .proto always translates to a single class, but you may want to
+  // explicitly choose the class name).
+  optional string java_outer_classname = 8;
+
+  // If set true, then the Java code generator will generate a separate .java
+  // file for each top-level message, enum, and service defined in the .proto
+  // file.  Thus, these types will *not* be nested inside the outer class
+  // named by java_outer_classname.  However, the outer class will still be
+  // generated to contain the file's getDescriptor() method as well as any
+  // top-level extensions defined in the file.
+  optional bool java_multiple_files = 10 [default=false];
+
+  // This option does nothing.
+  optional bool java_generate_equals_and_hash = 20 [deprecated=true];
+
+  // If set true, then the Java2 code generator will generate code that
+  // throws an exception whenever an attempt is made to assign a non-UTF-8
+  // byte sequence to a string field.
+  // Message reflection will do the same.
+  // However, an extension field still accepts non-UTF-8 byte sequences.
+  // This option has no effect on when used with the lite runtime.
+  optional bool java_string_check_utf8 = 27 [default=false];
+
+
+  // Generated classes can be optimized for speed or code size.
+  enum OptimizeMode {
+    SPEED = 1;        // Generate complete code for parsing, serialization,
+                      // etc.
+    CODE_SIZE = 2;    // Use ReflectionOps to implement these methods.
+    LITE_RUNTIME = 3; // Generate code using MessageLite and the lite runtime.
+  }
+  optional OptimizeMode optimize_for = 9 [default=SPEED];
+
+  // Sets the Go package where structs generated from this .proto will be
+  // placed. If omitted, the Go package will be derived from the following:
+  //   - The basename of the package import path, if provided.
+  //   - Otherwise, the package statement in the .proto file, if present.
+  //   - Otherwise, the basename of the .proto file, without extension.
+  optional string go_package = 11;
+
+
+
+  // Should generic services be generated in each language?  "Generic" services
+  // are not specific to any particular RPC system.  They are generated by the
+  // main code generators in each language (without additional plugins).
+  // Generic services were the only kind of service generation supported by
+  // early versions of google.protobuf.
+  //
+  // Generic services are now considered deprecated in favor of using plugins
+  // that generate code specific to your particular RPC system.  Therefore,
+  // these default to false.  Old code which depends on generic services should
+  // explicitly set them to true.
+  optional bool cc_generic_services = 16 [default=false];
+  optional bool java_generic_services = 17 [default=false];
+  optional bool py_generic_services = 18 [default=false];
+  optional bool php_generic_services = 42 [default=false];
+
+  // Is this file deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for everything in the file, or it will be completely ignored; in the very
+  // least, this is a formalization for deprecating files.
+  optional bool deprecated = 23 [default=false];
+
+  // Enables the use of arenas for the proto messages in this file. This applies
+  // only to generated classes for C++.
+  optional bool cc_enable_arenas = 31 [default=false];
+
+
+  // Sets the objective c class prefix which is prepended to all objective c
+  // generated classes from this .proto. There is no default.
+  optional string objc_class_prefix = 36;
+
+  // Namespace for generated classes; defaults to the package.
+  optional string csharp_namespace = 37;
+
+  // By default Swift generators will take the proto package and CamelCase it
+  // replacing '.' with underscore and use that to prefix the types/symbols
+  // defined. When this options is provided, they will use this value instead
+  // to prefix the types/symbols defined.
+  optional string swift_prefix = 39;
+
+  // Sets the php class prefix which is prepended to all php generated classes
+  // from this .proto. Default is empty.
+  optional string php_class_prefix = 40;
+
+  // Use this option to change the namespace of php generated classes. Default
+  // is empty. When this option is empty, the package name will be used for
+  // determining the namespace.
+  optional string php_namespace = 41;
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+
+  reserved 38;
+}
+
+message MessageOptions {
+  // Set true to use the old proto1 MessageSet wire format for extensions.
+  // This is provided for backwards-compatibility with the MessageSet wire
+  // format.  You should not use this for any other reason:  It's less
+  // efficient, has fewer features, and is more complicated.
+  //
+  // The message must be defined exactly as follows:
+  //   message Foo {
+  //     option message_set_wire_format = true;
+  //     extensions 4 to max;
+  //   }
+  // Note that the message cannot have any defined fields; MessageSets only
+  // have extensions.
+  //
+  // All extensions of your type must be singular messages; e.g. they cannot
+  // be int32s, enums, or repeated messages.
+  //
+  // Because this is an option, the above two restrictions are not enforced by
+  // the protocol compiler.
+  optional bool message_set_wire_format = 1 [default=false];
+
+  // Disables the generation of the standard "descriptor()" accessor, which can
+  // conflict with a field of the same name.  This is meant to make migration
+  // from proto1 easier; new code should avoid fields named "descriptor".
+  optional bool no_standard_descriptor_accessor = 2 [default=false];
+
+  // Is this message deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the message, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating messages.
+  optional bool deprecated = 3 [default=false];
+
+  // Whether the message is an automatically generated map entry type for the
+  // maps field.
+  //
+  // For maps fields:
+  //     map<KeyType, ValueType> map_field = 1;
+  // The parsed descriptor looks like:
+  //     message MapFieldEntry {
+  //         option map_entry = true;
+  //         optional KeyType key = 1;
+  //         optional ValueType value = 2;
+  //     }
+  //     repeated MapFieldEntry map_field = 1;
+  //
+  // Implementations may choose not to generate the map_entry=true message, but
+  // use a native map in the target language to hold the keys and values.
+  // The reflection APIs in such implementions still need to work as
+  // if the field is a repeated message field.
+  //
+  // NOTE: Do not set the option in .proto files. Always use the maps syntax
+  // instead. The option should only be implicitly set by the proto compiler
+  // parser.
+  optional bool map_entry = 7;
+
+  reserved 8;  // javalite_serializable
+  reserved 9;  // javanano_as_lite
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message FieldOptions {
+  // The ctype option instructs the C++ code generator to use a different
+  // representation of the field than it normally would.  See the specific
+  // options below.  This option is not yet implemented in the open source
+  // release -- sorry, we'll try to include it in a future version!
+  optional CType ctype = 1 [default = STRING];
+  enum CType {
+    // Default mode.
+    STRING = 0;
+
+    CORD = 1;
+
+    STRING_PIECE = 2;
+  }
+  // The packed option can be enabled for repeated primitive fields to enable
+  // a more efficient representation on the wire. Rather than repeatedly
+  // writing the tag and type for each element, the entire array is encoded as
+  // a single length-delimited blob. In proto3, only explicit setting it to
+  // false will avoid using packed encoding.
+  optional bool packed = 2;
+
+  // The jstype option determines the JavaScript type used for values of the
+  // field.  The option is permitted only for 64 bit integral and fixed types
+  // (int64, uint64, sint64, fixed64, sfixed64).  A field with jstype JS_STRING
+  // is represented as JavaScript string, which avoids loss of precision that
+  // can happen when a large value is converted to a floating point JavaScript.
+  // Specifying JS_NUMBER for the jstype causes the generated JavaScript code to
+  // use the JavaScript "number" type.  The behavior of the default option
+  // JS_NORMAL is implementation dependent.
+  //
+  // This option is an enum to permit additional types to be added, e.g.
+  // goog.math.Integer.
+  optional JSType jstype = 6 [default = JS_NORMAL];
+  enum JSType {
+    // Use the default type.
+    JS_NORMAL = 0;
+
+    // Use JavaScript strings.
+    JS_STRING = 1;
+
+    // Use JavaScript numbers.
+    JS_NUMBER = 2;
+  }
+
+  // Should this field be parsed lazily?  Lazy applies only to message-type
+  // fields.  It means that when the outer message is initially parsed, the
+  // inner message's contents will not be parsed but instead stored in encoded
+  // form.  The inner message will actually be parsed when it is first accessed.
+  //
+  // This is only a hint.  Implementations are free to choose whether to use
+  // eager or lazy parsing regardless of the value of this option.  However,
+  // setting this option true suggests that the protocol author believes that
+  // using lazy parsing on this field is worth the additional bookkeeping
+  // overhead typically needed to implement it.
+  //
+  // This option does not affect the public interface of any generated code;
+  // all method signatures remain the same.  Furthermore, thread-safety of the
+  // interface is not affected by this option; const methods remain safe to
+  // call from multiple threads concurrently, while non-const methods continue
+  // to require exclusive access.
+  //
+  //
+  // Note that implementations may choose not to check required fields within
+  // a lazy sub-message.  That is, calling IsInitialized() on the outer message
+  // may return true even if the inner message has missing required fields.
+  // This is necessary because otherwise the inner message would have to be
+  // parsed in order to perform the check, defeating the purpose of lazy
+  // parsing.  An implementation which chooses not to check required fields
+  // must be consistent about it.  That is, for any particular sub-message, the
+  // implementation must either *always* check its required fields, or *never*
+  // check its required fields, regardless of whether or not the message has
+  // been parsed.
+  optional bool lazy = 5 [default=false];
+
+  // Is this field deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for accessors, or it will be completely ignored; in the very least, this
+  // is a formalization for deprecating fields.
+  optional bool deprecated = 3 [default=false];
+
+  // For Google-internal migration only. Do not use.
+  optional bool weak = 10 [default=false];
+
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+
+  reserved 4;  // removed jtype
+}
+
+message OneofOptions {
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message EnumOptions {
+
+  // Set this option to true to allow mapping different tag names to the same
+  // value.
+  optional bool allow_alias = 2;
+
+  // Is this enum deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the enum, or it will be completely ignored; in the very least, this
+  // is a formalization for deprecating enums.
+  optional bool deprecated = 3 [default=false];
+
+  reserved 5;  // javanano_as_lite
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message EnumValueOptions {
+  // Is this enum value deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the enum value, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating enum values.
+  optional bool deprecated = 1 [default=false];
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message ServiceOptions {
+
+  // Note:  Field numbers 1 through 32 are reserved for Google's internal RPC
+  //   framework.  We apologize for hoarding these numbers to ourselves, but
+  //   we were already using them long before we decided to release Protocol
+  //   Buffers.
+
+  // Is this service deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the service, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating services.
+  optional bool deprecated = 33 [default=false];
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+message MethodOptions {
+
+  // Note:  Field numbers 1 through 32 are reserved for Google's internal RPC
+  //   framework.  We apologize for hoarding these numbers to ourselves, but
+  //   we were already using them long before we decided to release Protocol
+  //   Buffers.
+
+  // Is this method deprecated?
+  // Depending on the target platform, this can emit Deprecated annotations
+  // for the method, or it will be completely ignored; in the very least,
+  // this is a formalization for deprecating methods.
+  optional bool deprecated = 33 [default=false];
+
+  // Is this method side-effect-free (or safe in HTTP parlance), or idempotent,
+  // or neither? HTTP based RPC implementation may choose GET verb for safe
+  // methods, and PUT verb for idempotent methods instead of the default POST.
+  enum IdempotencyLevel {
+    IDEMPOTENCY_UNKNOWN = 0;
+    NO_SIDE_EFFECTS     = 1; // implies idempotent
+    IDEMPOTENT          = 2; // idempotent, but may have side effects
+  }
+  optional IdempotencyLevel idempotency_level =
+      34 [default=IDEMPOTENCY_UNKNOWN];
+
+  // The parser stores options it doesn't recognize here. See above.
+  repeated UninterpretedOption uninterpreted_option = 999;
+
+  // Clients can define custom options in extensions of this message. See above.
+  extensions 1000 to max;
+}
+
+
+// A message representing a option the parser does not recognize. This only
+// appears in options protos created by the compiler::Parser class.
+// DescriptorPool resolves these when building Descriptor objects. Therefore,
+// options protos in descriptor objects (e.g. returned by Descriptor::options(),
+// or produced by Descriptor::CopyTo()) will never have UninterpretedOptions
+// in them.
+message UninterpretedOption {
+  // The name of the uninterpreted option.  Each string represents a segment in
+  // a dot-separated name.  is_extension is true iff a segment represents an
+  // extension (denoted with parentheses in options specs in .proto files).
+  // E.g.,{ ["foo", false], ["bar.baz", true], ["qux", false] } represents
+  // "foo.(bar.baz).qux".
+  message NamePart {
+    required string name_part = 1;
+    required bool is_extension = 2;
+  }
+  repeated NamePart name = 2;
+
+  // The value of the uninterpreted option, in whatever type the tokenizer
+  // identified it as during parsing. Exactly one of these should be set.
+  optional string identifier_value = 3;
+  optional uint64 positive_int_value = 4;
+  optional int64 negative_int_value = 5;
+  optional double double_value = 6;
+  optional bytes string_value = 7;
+  optional string aggregate_value = 8;
+}
+
+// ===================================================================
+// Optional source code info
+
+// Encapsulates information about the original source file from which a
+// FileDescriptorProto was generated.
+message SourceCodeInfo {
+  // A Location identifies a piece of source code in a .proto file which
+  // corresponds to a particular definition.  This information is intended
+  // to be useful to IDEs, code indexers, documentation generators, and similar
+  // tools.
+  //
+  // For example, say we have a file like:
+  //   message Foo {
+  //     optional string foo = 1;
+  //   }
+  // Let's look at just the field definition:
+  //   optional string foo = 1;
+  //   ^       ^^     ^^  ^  ^^^
+  //   a       bc     de  f  ghi
+  // We have the following locations:
+  //   span   path               represents
+  //   [a,i)  [ 4, 0, 2, 0 ]     The whole field definition.
+  //   [a,b)  [ 4, 0, 2, 0, 4 ]  The label (optional).
+  //   [c,d)  [ 4, 0, 2, 0, 5 ]  The type (string).
+  //   [e,f)  [ 4, 0, 2, 0, 1 ]  The name (foo).
+  //   [g,h)  [ 4, 0, 2, 0, 3 ]  The number (1).
+  //
+  // Notes:
+  // - A location may refer to a repeated field itself (i.e. not to any
+  //   particular index within it).  This is used whenever a set of elements are
+  //   logically enclosed in a single code segment.  For example, an entire
+  //   extend block (possibly containing multiple extension definitions) will
+  //   have an outer location whose path refers to the "extensions" repeated
+  //   field without an index.
+  // - Multiple locations may have the same path.  This happens when a single
+  //   logical declaration is spread out across multiple places.  The most
+  //   obvious example is the "extend" block again -- there may be multiple
+  //   extend blocks in the same scope, each of which will have the same path.
+  // - A location's span is not always a subset of its parent's span.  For
+  //   example, the "extendee" of an extension declaration appears at the
+  //   beginning of the "extend" block and is shared by all extensions within
+  //   the block.
+  // - Just because a location's span is a subset of some other location's span
+  //   does not mean that it is a descendent.  For example, a "group" defines
+  //   both a type and a field in a single declaration.  Thus, the locations
+  //   corresponding to the type and field and their components will overlap.
+  // - Code which tries to interpret locations should probably be designed to
+  //   ignore those that it doesn't understand, as more types of locations could
+  //   be recorded in the future.
+  repeated Location location = 1;
+  message Location {
+    // Identifies which part of the FileDescriptorProto was defined at this
+    // location.
+    //
+    // Each element is a field number or an index.  They form a path from
+    // the root FileDescriptorProto to the place where the definition.  For
+    // example, this path:
+    //   [ 4, 3, 2, 7, 1 ]
+    // refers to:
+    //   file.message_type(3)  // 4, 3
+    //       .field(7)         // 2, 7
+    //       .name()           // 1
+    // This is because FileDescriptorProto.message_type has field number 4:
+    //   repeated DescriptorProto message_type = 4;
+    // and DescriptorProto.field has field number 2:
+    //   repeated FieldDescriptorProto field = 2;
+    // and FieldDescriptorProto.name has field number 1:
+    //   optional string name = 1;
+    //
+    // Thus, the above path gives the location of a field name.  If we removed
+    // the last element:
+    //   [ 4, 3, 2, 7 ]
+    // this path refers to the whole field declaration (from the beginning
+    // of the label to the terminating semicolon).
+    repeated int32 path = 1 [packed=true];
+
+    // Always has exactly three or four elements: start line, start column,
+    // end line (optional, otherwise assumed same as start line), end column.
+    // These are packed into a single field for efficiency.  Note that line
+    // and column numbers are zero-based -- typically you will want to add
+    // 1 to each before displaying to a user.
+    repeated int32 span = 2 [packed=true];
+
+    // If this SourceCodeInfo represents a complete declaration, these are any
+    // comments appearing before and after the declaration which appear to be
+    // attached to the declaration.
+    //
+    // A series of line comments appearing on consecutive lines, with no other
+    // tokens appearing on those lines, will be treated as a single comment.
+    //
+    // leading_detached_comments will keep paragraphs of comments that appear
+    // before (but not connected to) the current element. Each paragraph,
+    // separated by empty lines, will be one comment element in the repeated
+    // field.
+    //
+    // Only the comment content is provided; comment markers (e.g. //) are
+    // stripped out.  For block comments, leading whitespace and an asterisk
+    // will be stripped from the beginning of each line other than the first.
+    // Newlines are included in the output.
+    //
+    // Examples:
+    //
+    //   optional int32 foo = 1;  // Comment attached to foo.
+    //   // Comment attached to bar.
+    //   optional int32 bar = 2;
+    //
+    //   optional string baz = 3;
+    //   // Comment attached to baz.
+    //   // Another line attached to baz.
+    //
+    //   // Comment attached to qux.
+    //   //
+    //   // Another line attached to qux.
+    //   optional double qux = 4;
+    //
+    //   // Detached comment for corge. This is not leading or trailing comments
+    //   // to qux or corge because there are blank lines separating it from
+    //   // both.
+    //
+    //   // Detached comment for corge paragraph 2.
+    //
+    //   optional string corge = 5;
+    //   /* Block comment attached
+    //    * to corge.  Leading asterisks
+    //    * will be removed. */
+    //   /* Block comment attached to
+    //    * grault. */
+    //   optional int32 grault = 6;
+    //
+    //   // ignored detached comments.
+    optional string leading_comments = 3;
+    optional string trailing_comments = 4;
+    repeated string leading_detached_comments = 6;
+  }
+}
+
+// Describes the relationship between generated code and its original source
+// file. A GeneratedCodeInfo message is associated with only one generated
+// source file, but may contain references to different source .proto files.
+message GeneratedCodeInfo {
+  // An Annotation connects some span of text in generated code to an element
+  // of its generating .proto file.
+  repeated Annotation annotation = 1;
+  message Annotation {
+    // Identifies the element in the original source .proto file. This field
+    // is formatted the same as SourceCodeInfo.Location.path.
+    repeated int32 path = 1 [packed=true];
+
+    // Identifies the filesystem path to the original source .proto.
+    optional string source_file = 2;
+
+    // Identifies the starting offset in bytes in the generated code
+    // that relates to the identified object.
+    optional int32 begin = 3;
+
+    // Identifies the ending offset in bytes in the generated code that
+    // relates to the identified offset. The end offset should be one past
+    // the last relevant byte (so the length of the text = end - begin).
+    optional int32 end = 4;
+  }
+}

vendor/golang.org/x/oauth2/google/appengine.go

@@ -14,8 +14,8 @@ import (
 	"golang.org/x/oauth2"
 )
 
-// Set at init time by appenginevm_hook.go. If true, we are on App Engine Managed VMs.
+// appengineFlex is set at init time by appengineflex_hook.go. If true, we are on App Engine Flex.
-var appengineVM bool
+var appengineFlex bool
 
 // Set at init time by appengine_hook.go. If nil, we're not on App Engine.
 var appengineTokenFunc func(c context.Context, scopes ...string) (token string, expiry time.Time, err error)

vendor/golang.org/x/oauth2/google/appengine_hook.go

@@ -1,15 +1,14 @@
-// Copyright 2015 The oauth2 Authors. All rights reserved.
+// Copyright 2015 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build appenginevm
+// +build appengine appenginevm
 
 package google
 
 import "google.golang.org/appengine"
 
 func init() {
-	appengineVM = true
 	appengineTokenFunc = appengine.AccessToken
 	appengineAppIDFunc = appengine.AppID
 }

vendor/golang.org/x/oauth2/google/appengineflex_hook.go

@@ -0,0 +1,11 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build appenginevm
+
+package google
+
+func init() {
+	appengineFlex = true // Flex doesn't support appengine.AccessToken; depend on metadata server.
+}

vendor/golang.org/x/oauth2/google/default.go

@@ -24,6 +24,12 @@ import (
 type DefaultCredentials struct {
 	ProjectID   string // may be empty
 	TokenSource oauth2.TokenSource
+
+	// JSON contains the raw bytes from a JSON credentials file.
+	// This field may be nil if authentication is provided by the
+	// environment and not with a credentials file, e.g. when code is
+	// running on Google Cloud Platform.
+	JSON []byte
 }
 
 // DefaultClient returns an HTTP Client that uses the
@@ -81,7 +87,7 @@ func FindDefaultCredentials(ctx context.Context, scope ...string) (*DefaultCrede
 	}
 
 	// Third, if we're on Google App Engine use those credentials.
-	if appengineTokenFunc != nil && !appengineVM {
+	if appengineTokenFunc != nil && !appengineFlex {
 		return &DefaultCredentials{
 			ProjectID:   appengineAppIDFunc(ctx),
 			TokenSource: AppEngineTokenSource(ctx, scope...),
@@ -126,5 +132,6 @@ func readCredentialsFile(ctx context.Context, filename string, scopes []string)
 	return &DefaultCredentials{
 		ProjectID:   f.ProjectID,
 		TokenSource: ts,
+		JSON:        b,
 	}, nil
 }

vendor/google.golang.org/api/gensupport/json.go

@@ -22,23 +22,33 @@ func MarshalJSON(schema interface{}, forceSendFields, nullFields []string) ([]by
 		return json.Marshal(schema)
 	}
 
-	mustInclude := make(map[string]struct{})
+	mustInclude := make(map[string]bool)
 	for _, f := range forceSendFields {
-		mustInclude[f] = struct{}{}
+		mustInclude[f] = true
+	}
+	useNull := make(map[string]bool)
+	useNullMaps := make(map[string]map[string]bool)
+	for _, nf := range nullFields {
+		parts := strings.SplitN(nf, ".", 2)
+		field := parts[0]
+		if len(parts) == 1 {
+			useNull[field] = true
+		} else {
+			if useNullMaps[field] == nil {
+				useNullMaps[field] = map[string]bool{}
+			}
+			useNullMaps[field][parts[1]] = true
 		}
-	useNull := make(map[string]struct{})
-	for _, f := range nullFields {
-		useNull[f] = struct{}{}
 	}
 
-	dataMap, err := schemaToMap(schema, mustInclude, useNull)
+	dataMap, err := schemaToMap(schema, mustInclude, useNull, useNullMaps)
 	if err != nil {
 		return nil, err
 	}
 	return json.Marshal(dataMap)
 }
 
-func schemaToMap(schema interface{}, mustInclude, useNull map[string]struct{}) (map[string]interface{}, error) {
+func schemaToMap(schema interface{}, mustInclude, useNull map[string]bool, useNullMaps map[string]map[string]bool) (map[string]interface{}, error) {
 	m := make(map[string]interface{})
 	s := reflect.ValueOf(schema)
 	st := s.Type()
@@ -59,17 +69,35 @@ func schemaToMap(schema interface{}, mustInclude, useNull map[string]struct{}) (
 		v := s.Field(i)
 		f := st.Field(i)
 
-		if _, ok := useNull[f.Name]; ok {
+		if useNull[f.Name] {
 			if !isEmptyValue(v) {
 				return nil, fmt.Errorf("field %q in NullFields has non-empty value", f.Name)
 			}
 			m[tag.apiName] = nil
 			continue
 		}
+
 		if !includeField(v, f, mustInclude) {
 			continue
 		}
 
+		// If map fields are explicitly set to null, use a map[string]interface{}.
+		if f.Type.Kind() == reflect.Map && useNullMaps[f.Name] != nil {
+			ms, ok := v.Interface().(map[string]string)
+			if !ok {
+				return nil, fmt.Errorf("field %q has keys in NullFields but is not a map[string]string", f.Name)
+			}
+			mi := map[string]interface{}{}
+			for k, v := range ms {
+				mi[k] = v
+			}
+			for k := range useNullMaps[f.Name] {
+				mi[k] = nil
+			}
+			m[tag.apiName] = mi
+			continue
+		}
+
 		// nil maps are treated as empty maps.
 		if f.Type.Kind() == reflect.Map && v.IsNil() {
 			m[tag.apiName] = map[string]string{}
@@ -139,7 +167,7 @@ func parseJSONTag(val string) (jsonTag, error) {
 }
 
 // Reports whether the struct field "f" with value "v" should be included in JSON output.
-func includeField(v reflect.Value, f reflect.StructField, mustInclude map[string]struct{}) bool {
+func includeField(v reflect.Value, f reflect.StructField, mustInclude map[string]bool) bool {
 	// The regular JSON encoding of a nil pointer is "null", which means "delete this field".
 	// Therefore, we could enable field deletion by honoring pointer fields' presence in the mustInclude set.
 	// However, many fields are not pointers, so there would be no way to delete these fields.
@@ -156,8 +184,7 @@ func includeField(v reflect.Value, f reflect.StructField, mustInclude map[string
 		return false
 	}
 
-	_, ok := mustInclude[f.Name]
+	return mustInclude[f.Name] || !isEmptyValue(v)
-	return ok || !isEmptyValue(v)
 }
 
 // isEmptyValue reports whether v is the empty value for its type.  This

vendor/google.golang.org/api/gensupport/media.go

@@ -174,26 +174,126 @@ func typeHeader(contentType string) textproto.MIMEHeader {
 // PrepareUpload determines whether the data in the supplied reader should be
 // uploaded in a single request, or in sequential chunks.
 // chunkSize is the size of the chunk that media should be split into.
-// If chunkSize is non-zero and the contents of media do not fit in a single
+//
-// chunk (or there is an error reading media), then media will be returned as a
+// If chunkSize is zero, media is returned as the first value, and the other
-// MediaBuffer.  Otherwise, media will be returned as a Reader.
+// two return values are nil, true.
+//
+// Otherwise, a MediaBuffer is returned, along with a bool indicating whether the
+// contents of media fit in a single chunk.
 //
 // After PrepareUpload has been called, media should no longer be used: the
 // media content should be accessed via one of the return values.
-func PrepareUpload(media io.Reader, chunkSize int) (io.Reader, *MediaBuffer) {
+func PrepareUpload(media io.Reader, chunkSize int) (r io.Reader, mb *MediaBuffer, singleChunk bool) {
 	if chunkSize == 0 { // do not chunk
-		return media, nil
+		return media, nil, true
+	}
+	mb = NewMediaBuffer(media, chunkSize)
+	_, _, _, err := mb.Chunk()
+	// If err is io.EOF, we can upload this in a single request. Otherwise, err is
+	// either nil or a non-EOF error. If it is the latter, then the next call to
+	// mb.Chunk will return the same error. Returning a MediaBuffer ensures that this
+	// error will be handled at some point.
+	return nil, mb, err == io.EOF
+}
+
+// MediaInfo holds information for media uploads. It is intended for use by generated
+// code only.
+type MediaInfo struct {
+	// At most one of Media and MediaBuffer will be set.
+	media           io.Reader
+	buffer          *MediaBuffer
+	singleChunk     bool
+	mType           string
+	size            int64 // mediaSize, if known.  Used only for calls to progressUpdater_.
+	progressUpdater googleapi.ProgressUpdater
+}
+
+// NewInfoFromMedia should be invoked from the Media method of a call. It returns a
+// MediaInfo populated with chunk size and content type, and a reader or MediaBuffer
+// if needed.
+func NewInfoFromMedia(r io.Reader, options []googleapi.MediaOption) *MediaInfo {
+	mi := &MediaInfo{}
+	opts := googleapi.ProcessMediaOptions(options)
+	if !opts.ForceEmptyContentType {
+		r, mi.mType = DetermineContentType(r, opts.ContentType)
+	}
+	mi.media, mi.buffer, mi.singleChunk = PrepareUpload(r, opts.ChunkSize)
+	return mi
+}
+
+// NewInfoFromResumableMedia should be invoked from the ResumableMedia method of a
+// call. It returns a MediaInfo using the given reader, size and media type.
+func NewInfoFromResumableMedia(r io.ReaderAt, size int64, mediaType string) *MediaInfo {
+	rdr := ReaderAtToReader(r, size)
+	rdr, mType := DetermineContentType(rdr, mediaType)
+	return &MediaInfo{
+		size:        size,
+		mType:       mType,
+		buffer:      NewMediaBuffer(rdr, googleapi.DefaultUploadChunkSize),
+		media:       nil,
+		singleChunk: false,
+	}
+}
+
+func (mi *MediaInfo) SetProgressUpdater(pu googleapi.ProgressUpdater) {
+	if mi != nil {
+		mi.progressUpdater = pu
+	}
+}
+
+// UploadType determines the type of upload: a single request, or a resumable
+// series of requests.
+func (mi *MediaInfo) UploadType() string {
+	if mi.singleChunk {
+		return "multipart"
+	}
+	return "resumable"
+}
+
+// UploadRequest sets up an HTTP request for media upload. It adds headers
+// as necessary, and returns a replacement for the body.
+func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, cleanup func()) {
+	cleanup = func() {}
+	if mi == nil {
+		return body, cleanup
+	}
+	var media io.Reader
+	if mi.media != nil {
+		// This only happens when the caller has turned off chunking. In that
+		// case, we write all of media in a single non-retryable request.
+		media = mi.media
+	} else if mi.singleChunk {
+		// The data fits in a single chunk, which has now been read into the MediaBuffer.
+		// We obtain that chunk so we can write it in a single request. The request can
+		// be retried because the data is stored in the MediaBuffer.
+		media, _, _, _ = mi.buffer.Chunk()
+	}
+	if media != nil {
+		combined, ctype := CombineBodyMedia(body, "application/json", media, mi.mType)
+		cleanup = func() { combined.Close() }
+		reqHeaders.Set("Content-Type", ctype)
+		body = combined
+	}
+	if mi.buffer != nil && mi.mType != "" && !mi.singleChunk {
+		reqHeaders.Set("X-Upload-Content-Type", mi.mType)
+	}
+	return body, cleanup
+}
+
+// ResumableUpload returns an appropriately configured ResumableUpload value if the
+// upload is resumable, or nil otherwise.
+func (mi *MediaInfo) ResumableUpload(locURI string) *ResumableUpload {
+	if mi == nil || mi.singleChunk {
+		return nil
+	}
+	return &ResumableUpload{
+		URI:       locURI,
+		Media:     mi.buffer,
+		MediaType: mi.mType,
+		Callback: func(curr int64) {
+			if mi.progressUpdater != nil {
+				mi.progressUpdater(curr, mi.size)
+			}
+		},
 	}
-
-	mb := NewMediaBuffer(media, chunkSize)
-	rdr, _, _, err := mb.Chunk()
-
-	if err == io.EOF { // we can upload this in a single request
-		return rdr, nil
-	}
-	// err might be a non-EOF error. If it is, the next call to mb.Chunk will
-	// return the same error. Returning a MediaBuffer ensures that this error
-	// will be handled at some point.
-
-	return nil, mb
 }

vendor/google.golang.org/api/gensupport/send.go

@@ -5,6 +5,7 @@
 package gensupport
 
 import (
+	"errors"
 	"net/http"
 
 	"golang.org/x/net/context"
@@ -32,6 +33,11 @@ func RegisterHook(h Hook) {
 // If ctx is non-nil, it calls all hooks, then sends the request with
 // ctxhttp.Do, then calls any functions returned by the hooks in reverse order.
 func SendRequest(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+	// Disallow Accept-Encoding because it interferes with the automatic gzip handling
+	// done by the default http.Transport. See https://github.com/google/google-api-go-client/issues/219.
+	if _, ok := req.Header["Accept-Encoding"]; ok {
+		return nil, errors.New("google api: custom Accept-Encoding headers not allowed")
+	}
 	if ctx == nil {
 		return client.Do(req)
 	}

vendor/google.golang.org/api/googleapi/transport/apikey.go

@@ -0,0 +1,38 @@
+// Copyright 2012 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package transport contains HTTP transports used to make
+// authenticated API requests.
+package transport
+
+import (
+	"errors"
+	"net/http"
+)
+
+// APIKey is an HTTP Transport which wraps an underlying transport and
+// appends an API Key "key" parameter to the URL of outgoing requests.
+type APIKey struct {
+	// Key is the API Key to set on requests.
+	Key string
+
+	// Transport is the underlying HTTP transport.
+	// If nil, http.DefaultTransport is used.
+	Transport http.RoundTripper
+}
+
+func (t *APIKey) RoundTrip(req *http.Request) (*http.Response, error) {
+	rt := t.Transport
+	if rt == nil {
+		rt = http.DefaultTransport
+		if rt == nil {
+			return nil, errors.New("googleapi/transport: no Transport specified or available")
+		}
+	}
+	newReq := *req
+	args := newReq.URL.Query()
+	args.Set("key", t.Key)
+	newReq.URL.RawQuery = args.Encode()
+	return rt.RoundTrip(&newReq)
+}

vendor/google.golang.org/api/internal/creds.go

@@ -0,0 +1,104 @@
+// 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.
+
+package internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/google"
+)
+
+// Creds returns credential information obtained from DialSettings, or if none, then
+// it returns default credential information.
+func Creds(ctx context.Context, ds *DialSettings) (*google.DefaultCredentials, error) {
+	if ds.CredentialsFile != "" {
+		return credFileTokenSource(ctx, ds.CredentialsFile, ds.Scopes...)
+	}
+	if ds.TokenSource != nil {
+		return &google.DefaultCredentials{TokenSource: ds.TokenSource}, nil
+	}
+	return google.FindDefaultCredentials(ctx, ds.Scopes...)
+}
+
+// credFileTokenSource reads a refresh token file or a service account and returns
+// a TokenSource constructed from the config.
+func credFileTokenSource(ctx context.Context, filename string, scope ...string) (*google.DefaultCredentials, error) {
+	data, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, fmt.Errorf("cannot read credentials file: %v", err)
+	}
+	// See if it is a refresh token credentials file first.
+	ts, ok, err := refreshTokenTokenSource(ctx, data, scope...)
+	if err != nil {
+		return nil, err
+	}
+	if ok {
+		return &google.DefaultCredentials{
+			TokenSource: ts,
+			JSON:        data,
+		}, nil
+	}
+
+	// If not, it should be a service account.
+	cfg, err := google.JWTConfigFromJSON(data, scope...)
+	if err != nil {
+		return nil, fmt.Errorf("google.JWTConfigFromJSON: %v", err)
+	}
+	// jwt.Config does not expose the project ID, so re-unmarshal to get it.
+	var pid struct {
+		ProjectID string `json:"project_id"`
+	}
+	if err := json.Unmarshal(data, &pid); err != nil {
+		return nil, err
+	}
+	return &google.DefaultCredentials{
+		ProjectID:   pid.ProjectID,
+		TokenSource: cfg.TokenSource(ctx),
+		JSON:        data,
+	}, nil
+}
+
+func refreshTokenTokenSource(ctx context.Context, data []byte, scope ...string) (oauth2.TokenSource, bool, error) {
+	var c cred
+	if err := json.Unmarshal(data, &c); err != nil {
+		return nil, false, fmt.Errorf("cannot unmarshal credentials file: %v", err)
+	}
+	if c.ClientID == "" || c.ClientSecret == "" || c.RefreshToken == "" || c.Type != "authorized_user" {
+		return nil, false, nil
+	}
+	cfg := &oauth2.Config{
+		ClientID:     c.ClientID,
+		ClientSecret: c.ClientSecret,
+		Endpoint:     google.Endpoint,
+		RedirectURL:  "urn:ietf:wg:oauth:2.0:oob",
+		Scopes:       scope,
+	}
+	return cfg.TokenSource(ctx, &oauth2.Token{
+		RefreshToken: c.RefreshToken,
+		Expiry:       time.Now(),
+	}), true, nil
+}
+
+type cred struct {
+	ClientID     string `json:"client_id"`
+	ClientSecret string `json:"client_secret"`
+	RefreshToken string `json:"refresh_token"`
+	Type         string `json:"type"`
+}

vendor/google.golang.org/api/internal/pool.go

@@ -0,0 +1,59 @@
+// Copyright 2016 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.
+
+package internal
+
+import (
+	"errors"
+	"google.golang.org/grpc/naming"
+)
+
+// PoolResolver provides a fixed list of addresses to load balance between
+// and does not provide further updates.
+type PoolResolver struct {
+	poolSize int
+	dialOpt  *DialSettings
+	ch       chan []*naming.Update
+}
+
+// NewPoolResolver returns a PoolResolver
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+func NewPoolResolver(size int, o *DialSettings) *PoolResolver {
+	return &PoolResolver{poolSize: size, dialOpt: o}
+}
+
+// Resolve returns a Watcher for the endpoint defined by the DialSettings
+// provided to NewPoolResolver.
+func (r *PoolResolver) Resolve(target string) (naming.Watcher, error) {
+	if r.dialOpt.Endpoint == "" {
+		return nil, errors.New("No endpoint configured")
+	}
+	addrs := make([]*naming.Update, 0, r.poolSize)
+	for i := 0; i < r.poolSize; i++ {
+		addrs = append(addrs, &naming.Update{Op: naming.Add, Addr: r.dialOpt.Endpoint, Metadata: i})
+	}
+	r.ch = make(chan []*naming.Update, 1)
+	r.ch <- addrs
+	return r, nil
+}
+
+// Next returns a static list of updates on the first call,
+// and blocks indefinitely until Close is called on subsequent calls.
+func (r *PoolResolver) Next() ([]*naming.Update, error) {
+	return <-r.ch, nil
+}
+
+func (r *PoolResolver) Close() {
+	close(r.ch)
+}

vendor/google.golang.org/api/internal/service-account.json

@@ -0,0 +1,12 @@
+{
+  "type": "service_account",
+  "project_id": "project_id",
+  "private_key_id": "private_key_id",
+  "private_key": "private_key",
+  "client_email": "xyz@developer.gserviceaccount.com",
+  "client_id": "123",
+  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+  "token_uri": "https://accounts.google.com/o/oauth2/token",
+  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
+  "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/xyz%40developer.gserviceaccount.com"
+}

vendor/google.golang.org/api/internal/settings.go

@@ -0,0 +1,37 @@
+// 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.
+
+// Package internal supports the options and transport packages.
+package internal
+
+import (
+	"net/http"
+
+	"golang.org/x/oauth2"
+	"google.golang.org/grpc"
+)
+
+// DialSettings holds information needed to establish a connection with a
+// Google API service.
+type DialSettings struct {
+	Endpoint        string
+	Scopes          []string
+	TokenSource     oauth2.TokenSource
+	CredentialsFile string // if set, Token Source is ignored.
+	UserAgent       string
+	APIKey          string
+	HTTPClient      *http.Client
+	GRPCDialOpts    []grpc.DialOption
+	GRPCConn        *grpc.ClientConn
+}

vendor/google.golang.org/api/iterator/iterator.go

@@ -0,0 +1,231 @@
+// Copyright 2016 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.
+
+// Package iterator provides support for standard Google API iterators.
+// See https://github.com/GoogleCloudPlatform/gcloud-golang/wiki/Iterator-Guidelines.
+package iterator
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+)
+
+// Done is returned by an iterator's Next method when the iteration is
+// complete; when there are no more items to return.
+var Done = errors.New("no more items in iterator")
+
+// We don't support mixed calls to Next and NextPage because they play
+// with the paging state in incompatible ways.
+var errMixed = errors.New("iterator: Next and NextPage called on same iterator")
+
+// PageInfo contains information about an iterator's paging state.
+type PageInfo struct {
+	// Token is the token used to retrieve the next page of items from the
+	// API. You may set Token immediately after creating an iterator to
+	// begin iteration at a particular point. If Token is the empty string,
+	// the iterator will begin with the first eligible item.
+	//
+	// The result of setting Token after the first call to Next is undefined.
+	//
+	// After the underlying API method is called to retrieve a page of items,
+	// Token is set to the next-page token in the response.
+	Token string
+
+	// MaxSize is the maximum number of items returned by a call to the API.
+	// Set MaxSize as a hint to optimize the buffering behavior of the iterator.
+	// If zero, the page size is determined by the underlying service.
+	//
+	// Use Pager to retrieve a page of a specific, exact size.
+	MaxSize int
+
+	// The error state of the iterator. Manipulated by PageInfo.next and Pager.
+	// This is a latch: it starts as nil, and once set should never change.
+	err error
+
+	// If true, no more calls to fetch should be made. Set to true when fetch
+	// returns an empty page token. The iterator is Done when this is true AND
+	// the buffer is empty.
+	atEnd bool
+
+	// Function that fetches a page from the underlying service. It should pass
+	// the pageSize and pageToken arguments to the service, fill the buffer
+	// with the results from the call, and return the next-page token returned
+	// by the service. The function must not remove any existing items from the
+	// buffer. If the underlying RPC takes an int32 page size, pageSize should
+	// be silently truncated.
+	fetch func(pageSize int, pageToken string) (nextPageToken string, err error)
+
+	// Function that clears the iterator's buffer, returning any currently buffered items.
+	bufLen func() int
+
+	// Function that returns the buffer, after setting the buffer variable to nil.
+	takeBuf func() interface{}
+
+	// Set to true on first call to PageInfo.next or Pager.NextPage. Used to check
+	// for calls to both Next and NextPage with the same iterator.
+	nextCalled, nextPageCalled bool
+}
+
+// NewPageInfo exposes internals for iterator implementations.
+// It is not a stable interface.
+var NewPageInfo = newPageInfo
+
+// If an iterator can support paging, its iterator-creating method should call
+// this (via the NewPageInfo variable above).
+//
+// The fetch, bufLen and takeBuf arguments provide access to the
+// iterator's internal slice of buffered items. They behave as described in
+// PageInfo, above.
+//
+// The return value is the PageInfo.next method bound to the returned PageInfo value.
+// (Returning it avoids exporting PageInfo.next.)
+func newPageInfo(fetch func(int, string) (string, error), bufLen func() int, takeBuf func() interface{}) (*PageInfo, func() error) {
+	pi := &PageInfo{
+		fetch:   fetch,
+		bufLen:  bufLen,
+		takeBuf: takeBuf,
+	}
+	return pi, pi.next
+}
+
+// Remaining returns the number of items available before the iterator makes another API call.
+func (pi *PageInfo) Remaining() int { return pi.bufLen() }
+
+// next provides support for an iterator's Next function. An iterator's Next
+// should return the error returned by next if non-nil; else it can assume
+// there is at least one item in its buffer, and it should return that item and
+// remove it from the buffer.
+func (pi *PageInfo) next() error {
+	pi.nextCalled = true
+	if pi.err != nil { // Once we get an error, always return it.
+		// TODO(jba): fix so users can retry on transient errors? Probably not worth it.
+		return pi.err
+	}
+	if pi.nextPageCalled {
+		pi.err = errMixed
+		return pi.err
+	}
+	// Loop until we get some items or reach the end.
+	for pi.bufLen() == 0 && !pi.atEnd {
+		if err := pi.fill(pi.MaxSize); err != nil {
+			pi.err = err
+			return pi.err
+		}
+		if pi.Token == "" {
+			pi.atEnd = true
+		}
+	}
+	// Either the buffer is non-empty or pi.atEnd is true (or both).
+	if pi.bufLen() == 0 {
+		// The buffer is empty and pi.atEnd is true, i.e. the service has no
+		// more items.
+		pi.err = Done
+	}
+	return pi.err
+}
+
+// Call the service to fill the buffer, using size and pi.Token. Set pi.Token to the
+// next-page token returned by the call.
+// If fill returns a non-nil error, the buffer will be empty.
+func (pi *PageInfo) fill(size int) error {
+	tok, err := pi.fetch(size, pi.Token)
+	if err != nil {
+		pi.takeBuf() // clear the buffer
+		return err
+	}
+	pi.Token = tok
+	return nil
+}
+
+// Pageable is implemented by iterators that support paging.
+type Pageable interface {
+	// PageInfo returns paging information associated with the iterator.
+	PageInfo() *PageInfo
+}
+
+// Pager supports retrieving iterator items a page at a time.
+type Pager struct {
+	pageInfo *PageInfo
+	pageSize int
+}
+
+// NewPager returns a pager that uses iter. Calls to its NextPage method will
+// obtain exactly pageSize items, unless fewer remain. The pageToken argument
+// indicates where to start the iteration. Pass the empty string to start at
+// the beginning, or pass a token retrieved from a call to Pager.NextPage.
+//
+// If you use an iterator with a Pager, you must not call Next on the iterator.
+func NewPager(iter Pageable, pageSize int, pageToken string) *Pager {
+	p := &Pager{
+		pageInfo: iter.PageInfo(),
+		pageSize: pageSize,
+	}
+	p.pageInfo.Token = pageToken
+	if pageSize <= 0 {
+		p.pageInfo.err = errors.New("iterator: page size must be positive")
+	}
+	return p
+}
+
+// NextPage retrieves a sequence of items from the iterator and appends them
+// to slicep, which must be a pointer to a slice of the iterator's item type.
+// Exactly p.pageSize items will be appended, unless fewer remain.
+//
+// The first return value is the page token to use for the next page of items.
+// If empty, there are no more pages. Aside from checking for the end of the
+// iteration, the returned page token is only needed if the iteration is to be
+// resumed a later time, in another context (possibly another process).
+//
+// The second return value is non-nil if an error occurred. It will never be
+// the special iterator sentinel value Done. To recognize the end of the
+// iteration, compare nextPageToken to the empty string.
+//
+// It is possible for NextPage to return a single zero-length page along with
+// an empty page token when there are no more items in the iteration.
+func (p *Pager) NextPage(slicep interface{}) (nextPageToken string, err error) {
+	p.pageInfo.nextPageCalled = true
+	if p.pageInfo.err != nil {
+		return "", p.pageInfo.err
+	}
+	if p.pageInfo.nextCalled {
+		p.pageInfo.err = errMixed
+		return "", p.pageInfo.err
+	}
+	if p.pageInfo.bufLen() > 0 {
+		return "", errors.New("must call NextPage with an empty buffer")
+	}
+	// The buffer must be empty here, so takeBuf is a no-op. We call it just to get
+	// the buffer's type.
+	wantSliceType := reflect.PtrTo(reflect.ValueOf(p.pageInfo.takeBuf()).Type())
+	if slicep == nil {
+		return "", errors.New("nil passed to Pager.NextPage")
+	}
+	vslicep := reflect.ValueOf(slicep)
+	if vslicep.Type() != wantSliceType {
+		return "", fmt.Errorf("slicep should be of type %s, got %T", wantSliceType, slicep)
+	}
+	for p.pageInfo.bufLen() < p.pageSize {
+		if err := p.pageInfo.fill(p.pageSize - p.pageInfo.bufLen()); err != nil {
+			p.pageInfo.err = err
+			return "", p.pageInfo.err
+		}
+		if p.pageInfo.Token == "" {
+			break
+		}
+	}
+	e := vslicep.Elem()
+	e.Set(reflect.AppendSlice(e, reflect.ValueOf(p.pageInfo.takeBuf())))
+	return p.pageInfo.Token, nil
+}

vendor/google.golang.org/api/option/option.go

@@ -0,0 +1,162 @@
+// 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.
+
+// Package option contains options for Google API clients.
+package option
+
+import (
+	"net/http"
+
+	"golang.org/x/oauth2"
+	"google.golang.org/api/internal"
+	"google.golang.org/grpc"
+)
+
+// A ClientOption is an option for a Google API client.
+type ClientOption interface {
+	Apply(*internal.DialSettings)
+}
+
+// WithTokenSource returns a ClientOption that specifies an OAuth2 token
+// source to be used as the basis for authentication.
+func WithTokenSource(s oauth2.TokenSource) ClientOption {
+	return withTokenSource{s}
+}
+
+type withTokenSource struct{ ts oauth2.TokenSource }
+
+func (w withTokenSource) Apply(o *internal.DialSettings) {
+	o.TokenSource = w.ts
+}
+
+type withCredFile string
+
+func (w withCredFile) Apply(o *internal.DialSettings) {
+	o.CredentialsFile = string(w)
+}
+
+// WithCredentialsFile returns a ClientOption that authenticates
+// API calls with the given service account or refresh token JSON
+// credentials file.
+func WithCredentialsFile(filename string) ClientOption {
+	return withCredFile(filename)
+}
+
+// WithServiceAccountFile returns a ClientOption that uses a Google service
+// account credentials file to authenticate.
+//
+// Deprecated: Use WithCredentialsFile instead.
+func WithServiceAccountFile(filename string) ClientOption {
+	return WithCredentialsFile(filename)
+}
+
+// WithEndpoint returns a ClientOption that overrides the default endpoint
+// to be used for a service.
+func WithEndpoint(url string) ClientOption {
+	return withEndpoint(url)
+}
+
+type withEndpoint string
+
+func (w withEndpoint) Apply(o *internal.DialSettings) {
+	o.Endpoint = string(w)
+}
+
+// WithScopes returns a ClientOption that overrides the default OAuth2 scopes
+// to be used for a service.
+func WithScopes(scope ...string) ClientOption {
+	return withScopes(scope)
+}
+
+type withScopes []string
+
+func (w withScopes) Apply(o *internal.DialSettings) {
+	s := make([]string, len(w))
+	copy(s, w)
+	o.Scopes = s
+}
+
+// WithUserAgent returns a ClientOption that sets the User-Agent.
+func WithUserAgent(ua string) ClientOption {
+	return withUA(ua)
+}
+
+type withUA string
+
+func (w withUA) Apply(o *internal.DialSettings) { o.UserAgent = string(w) }
+
+// WithHTTPClient returns a ClientOption that specifies the HTTP client to use
+// as the basis of communications. This option may only be used with services
+// that support HTTP as their communication transport. When used, the
+// WithHTTPClient option takes precedent over all other supplied options.
+func WithHTTPClient(client *http.Client) ClientOption {
+	return withHTTPClient{client}
+}
+
+type withHTTPClient struct{ client *http.Client }
+
+func (w withHTTPClient) Apply(o *internal.DialSettings) {
+	o.HTTPClient = w.client
+}
+
+// WithGRPCConn returns a ClientOption that specifies the gRPC client
+// connection to use as the basis of communications. This option many only be
+// used with services that support gRPC as their communication transport. When
+// used, the WithGRPCConn option takes precedent over all other supplied
+// options.
+func WithGRPCConn(conn *grpc.ClientConn) ClientOption {
+	return withGRPCConn{conn}
+}
+
+type withGRPCConn struct{ conn *grpc.ClientConn }
+
+func (w withGRPCConn) Apply(o *internal.DialSettings) {
+	o.GRPCConn = w.conn
+}
+
+// WithGRPCDialOption returns a ClientOption that appends a new grpc.DialOption
+// to an underlying gRPC dial. It does not work with WithGRPCConn.
+func WithGRPCDialOption(opt grpc.DialOption) ClientOption {
+	return withGRPCDialOption{opt}
+}
+
+type withGRPCDialOption struct{ opt grpc.DialOption }
+
+func (w withGRPCDialOption) Apply(o *internal.DialSettings) {
+	o.GRPCDialOpts = append(o.GRPCDialOpts, w.opt)
+}
+
+// WithGRPCConnectionPool returns a ClientOption that creates a pool of gRPC
+// connections that requests will be balanced between.
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+func WithGRPCConnectionPool(size int) ClientOption {
+	return withGRPCConnectionPool(size)
+}
+
+type withGRPCConnectionPool int
+
+func (w withGRPCConnectionPool) Apply(o *internal.DialSettings) {
+	balancer := grpc.RoundRobin(internal.NewPoolResolver(int(w), o))
+	o.GRPCDialOpts = append(o.GRPCDialOpts, grpc.WithBalancer(balancer))
+}
+
+// WithAPIKey returns a ClientOption that specifies an API key to be used
+// as the basis for authentication.
+func WithAPIKey(apiKey string) ClientOption {
+	return withAPIKey(apiKey)
+}
+
+type withAPIKey string
+
+func (w withAPIKey) Apply(o *internal.DialSettings) { o.APIKey = string(w) }

vendor/google.golang.org/api/transport/http/dial.go

@@ -0,0 +1,107 @@
+// Copyright 2015 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.
+
+// Package transport/http supports network connections to HTTP servers.
+// This package is not intended for use by end developers. Use the
+// google.golang.org/api/option package to configure API clients.
+package http
+
+import (
+	"errors"
+	"net/http"
+
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2"
+	"google.golang.org/api/googleapi/transport"
+	"google.golang.org/api/internal"
+	"google.golang.org/api/option"
+)
+
+// NewClient returns an HTTP client for use communicating with a Google cloud
+// service, configured with the given ClientOptions. It also returns the endpoint
+// for the service as specified in the options.
+func NewClient(ctx context.Context, opts ...option.ClientOption) (*http.Client, string, error) {
+	var o internal.DialSettings
+	for _, opt := range opts {
+		opt.Apply(&o)
+	}
+	if o.GRPCConn != nil {
+		return nil, "", errors.New("unsupported gRPC connection specified")
+	}
+	// TODO(cbro): consider injecting the User-Agent even if an explicit HTTP client is provided?
+	if o.HTTPClient != nil {
+		return o.HTTPClient, o.Endpoint, nil
+	}
+	if o.APIKey != "" {
+		hc := &http.Client{
+			Transport: &transport.APIKey{
+				Key: o.APIKey,
+				Transport: userAgentTransport{
+					base:      baseTransport(ctx),
+					userAgent: o.UserAgent,
+				},
+			},
+		}
+		return hc, o.Endpoint, nil
+	}
+	creds, err := internal.Creds(ctx, &o)
+	if err != nil {
+		return nil, "", err
+	}
+	hc := &http.Client{
+		Transport: &oauth2.Transport{
+			Source: creds.TokenSource,
+			Base: userAgentTransport{
+				base:      baseTransport(ctx),
+				userAgent: o.UserAgent,
+			},
+		},
+	}
+	return hc, o.Endpoint, nil
+}
+
+type userAgentTransport struct {
+	userAgent string
+	base      http.RoundTripper
+}
+
+func (t userAgentTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	rt := t.base
+	if rt == nil {
+		return nil, errors.New("transport: no Transport specified")
+	}
+	if t.userAgent == "" {
+		return rt.RoundTrip(req)
+	}
+	newReq := *req
+	newReq.Header = make(http.Header)
+	for k, vv := range req.Header {
+		newReq.Header[k] = vv
+	}
+	// TODO(cbro): append to existing User-Agent header?
+	newReq.Header["User-Agent"] = []string{t.userAgent}
+	return rt.RoundTrip(&newReq)
+}
+
+// Set at init time by dial_appengine.go. If nil, we're not on App Engine.
+var appengineUrlfetchHook func(context.Context) http.RoundTripper
+
+// baseTransport returns the base HTTP transport.
+// On App Engine, this is urlfetch.Transport, otherwise it's http.DefaultTransport.
+func baseTransport(ctx context.Context) http.RoundTripper {
+	if appengineUrlfetchHook != nil {
+		return appengineUrlfetchHook(ctx)
+	}
+	return http.DefaultTransport
+}

vendor/google.golang.org/genproto/googleapis/api/annotations/annotations.pb.go

@@ -0,0 +1,64 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/api/annotations.proto
+
+/*
+Package annotations is a generated protocol buffer package.
+
+It is generated from these files:
+	google/api/annotations.proto
+	google/api/http.proto
+
+It has these top-level messages:
+	Http
+	HttpRule
+	CustomHttpPattern
+*/
+package annotations
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import google_protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+var E_Http = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.MethodOptions)(nil),
+	ExtensionType: (*HttpRule)(nil),
+	Field:         72295728,
+	Name:          "google.api.http",
+	Tag:           "bytes,72295728,opt,name=http",
+	Filename:      "google/api/annotations.proto",
+}
+
+func init() {
+	proto.RegisterExtension(E_Http)
+}
+
+func init() { proto.RegisterFile("google/api/annotations.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 208 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x49, 0xcf, 0xcf, 0x4f,
+	0xcf, 0x49, 0xd5, 0x4f, 0x2c, 0xc8, 0xd4, 0x4f, 0xcc, 0xcb, 0xcb, 0x2f, 0x49, 0x2c, 0xc9, 0xcc,
+	0xcf, 0x2b, 0xd6, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x82, 0xc8, 0xea, 0x25, 0x16, 0x64,
+	0x4a, 0x89, 0x22, 0xa9, 0xcc, 0x28, 0x29, 0x29, 0x80, 0x28, 0x91, 0x52, 0x80, 0x0a, 0x83, 0x79,
+	0x49, 0xa5, 0x69, 0xfa, 0x29, 0xa9, 0xc5, 0xc9, 0x45, 0x99, 0x05, 0x25, 0xf9, 0x45, 0x10, 0x15,
+	0x56, 0xde, 0x5c, 0x2c, 0x20, 0xf5, 0x42, 0x72, 0x7a, 0x50, 0xd3, 0x60, 0x4a, 0xf5, 0x7c, 0x53,
+	0x4b, 0x32, 0xf2, 0x53, 0xfc, 0x0b, 0xc0, 0x56, 0x4a, 0x6c, 0x38, 0xb5, 0x47, 0x49, 0x81, 0x51,
+	0x83, 0xdb, 0x48, 0x44, 0x0f, 0x61, 0xad, 0x9e, 0x47, 0x49, 0x49, 0x41, 0x50, 0x69, 0x4e, 0x6a,
+	0x10, 0xd8, 0x10, 0xa7, 0x3c, 0x2e, 0xbe, 0xe4, 0xfc, 0x5c, 0x24, 0x05, 0x4e, 0x02, 0x8e, 0x08,
+	0x67, 0x07, 0x80, 0x4c, 0x0e, 0x60, 0x8c, 0x72, 0x84, 0xca, 0xa7, 0xe7, 0xe7, 0x24, 0xe6, 0xa5,
+	0xeb, 0xe5, 0x17, 0xa5, 0xeb, 0xa7, 0xa7, 0xe6, 0x81, 0xed, 0xd5, 0x87, 0x48, 0x25, 0x16, 0x64,
+	0x16, 0xa3, 0x7b, 0xda, 0x1a, 0x89, 0xbd, 0x88, 0x89, 0xc5, 0xdd, 0x31, 0xc0, 0x33, 0x89, 0x0d,
+	0xac, 0xc9, 0x18, 0x10, 0x00, 0x00, 0xff, 0xff, 0xe3, 0x29, 0x19, 0x62, 0x28, 0x01, 0x00, 0x00,
+}

vendor/google.golang.org/genproto/googleapis/api/annotations/http.pb.go

@@ -0,0 +1,566 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/api/http.proto
+
+package annotations
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// Defines the HTTP configuration for a service. It contains a list of
+// [HttpRule][google.api.HttpRule], each specifying the mapping of an RPC method
+// to one or more HTTP REST API methods.
+type Http struct {
+	// A list of HTTP configuration rules that apply to individual API methods.
+	//
+	// **NOTE:** All service configuration rules follow "last one wins" order.
+	Rules []*HttpRule `protobuf:"bytes,1,rep,name=rules" json:"rules,omitempty"`
+}
+
+func (m *Http) Reset()                    { *m = Http{} }
+func (m *Http) String() string            { return proto.CompactTextString(m) }
+func (*Http) ProtoMessage()               {}
+func (*Http) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+func (m *Http) GetRules() []*HttpRule {
+	if m != nil {
+		return m.Rules
+	}
+	return nil
+}
+
+// `HttpRule` defines the mapping of an RPC method to one or more HTTP
+// REST APIs.  The mapping determines what portions of the request
+// message are populated from the path, query parameters, or body of
+// the HTTP request.  The mapping is typically specified as an
+// `google.api.http` annotation, see "google/api/annotations.proto"
+// for details.
+//
+// The mapping consists of a field specifying the path template and
+// method kind.  The path template can refer to fields in the request
+// message, as in the example below which describes a REST GET
+// operation on a resource collection of messages:
+//
+//
+//     service Messaging {
+//       rpc GetMessage(GetMessageRequest) returns (Message) {
+//         option (google.api.http).get = "/v1/messages/{message_id}/{sub.subfield}";
+//       }
+//     }
+//     message GetMessageRequest {
+//       message SubMessage {
+//         string subfield = 1;
+//       }
+//       string message_id = 1; // mapped to the URL
+//       SubMessage sub = 2;    // `sub.subfield` is url-mapped
+//     }
+//     message Message {
+//       string text = 1; // content of the resource
+//     }
+//
+// The same http annotation can alternatively be expressed inside the
+// `GRPC API Configuration` YAML file.
+//
+//     http:
+//       rules:
+//         - selector: <proto_package_name>.Messaging.GetMessage
+//           get: /v1/messages/{message_id}/{sub.subfield}
+//
+// This definition enables an automatic, bidrectional mapping of HTTP
+// JSON to RPC. Example:
+//
+// HTTP | RPC
+// -----|-----
+// `GET /v1/messages/123456/foo`  | `GetMessage(message_id: "123456" sub: SubMessage(subfield: "foo"))`
+//
+// In general, not only fields but also field paths can be referenced
+// from a path pattern. Fields mapped to the path pattern cannot be
+// repeated and must have a primitive (non-message) type.
+//
+// Any fields in the request message which are not bound by the path
+// pattern automatically become (optional) HTTP query
+// parameters. Assume the following definition of the request message:
+//
+//
+//     message GetMessageRequest {
+//       message SubMessage {
+//         string subfield = 1;
+//       }
+//       string message_id = 1; // mapped to the URL
+//       int64 revision = 2;    // becomes a parameter
+//       SubMessage sub = 3;    // `sub.subfield` becomes a parameter
+//     }
+//
+//
+// This enables a HTTP JSON to RPC mapping as below:
+//
+// HTTP | RPC
+// -----|-----
+// `GET /v1/messages/123456?revision=2&sub.subfield=foo` | `GetMessage(message_id: "123456" revision: 2 sub: SubMessage(subfield: "foo"))`
+//
+// Note that fields which are mapped to HTTP parameters must have a
+// primitive type or a repeated primitive type. Message types are not
+// allowed. In the case of a repeated type, the parameter can be
+// repeated in the URL, as in `...?param=A&param=B`.
+//
+// For HTTP method kinds which allow a request body, the `body` field
+// specifies the mapping. Consider a REST update method on the
+// message resource collection:
+//
+//
+//     service Messaging {
+//       rpc UpdateMessage(UpdateMessageRequest) returns (Message) {
+//         option (google.api.http) = {
+//           put: "/v1/messages/{message_id}"
+//           body: "message"
+//         };
+//       }
+//     }
+//     message UpdateMessageRequest {
+//       string message_id = 1; // mapped to the URL
+//       Message message = 2;   // mapped to the body
+//     }
+//
+//
+// The following HTTP JSON to RPC mapping is enabled, where the
+// representation of the JSON in the request body is determined by
+// protos JSON encoding:
+//
+// HTTP | RPC
+// -----|-----
+// `PUT /v1/messages/123456 { "text": "Hi!" }` | `UpdateMessage(message_id: "123456" message { text: "Hi!" })`
+//
+// The special name `*` can be used in the body mapping to define that
+// every field not bound by the path template should be mapped to the
+// request body.  This enables the following alternative definition of
+// the update method:
+//
+//     service Messaging {
+//       rpc UpdateMessage(Message) returns (Message) {
+//         option (google.api.http) = {
+//           put: "/v1/messages/{message_id}"
+//           body: "*"
+//         };
+//       }
+//     }
+//     message Message {
+//       string message_id = 1;
+//       string text = 2;
+//     }
+//
+//
+// The following HTTP JSON to RPC mapping is enabled:
+//
+// HTTP | RPC
+// -----|-----
+// `PUT /v1/messages/123456 { "text": "Hi!" }` | `UpdateMessage(message_id: "123456" text: "Hi!")`
+//
+// Note that when using `*` in the body mapping, it is not possible to
+// have HTTP parameters, as all fields not bound by the path end in
+// the body. This makes this option more rarely used in practice of
+// defining REST APIs. The common usage of `*` is in custom methods
+// which don't use the URL at all for transferring data.
+//
+// It is possible to define multiple HTTP methods for one RPC by using
+// the `additional_bindings` option. Example:
+//
+//     service Messaging {
+//       rpc GetMessage(GetMessageRequest) returns (Message) {
+//         option (google.api.http) = {
+//           get: "/v1/messages/{message_id}"
+//           additional_bindings {
+//             get: "/v1/users/{user_id}/messages/{message_id}"
+//           }
+//         };
+//       }
+//     }
+//     message GetMessageRequest {
+//       string message_id = 1;
+//       string user_id = 2;
+//     }
+//
+//
+// This enables the following two alternative HTTP JSON to RPC
+// mappings:
+//
+// HTTP | RPC
+// -----|-----
+// `GET /v1/messages/123456` | `GetMessage(message_id: "123456")`
+// `GET /v1/users/me/messages/123456` | `GetMessage(user_id: "me" message_id: "123456")`
+//
+// # Rules for HTTP mapping
+//
+// The rules for mapping HTTP path, query parameters, and body fields
+// to the request message are as follows:
+//
+// 1. The `body` field specifies either `*` or a field path, or is
+//    omitted. If omitted, it assumes there is no HTTP body.
+// 2. Leaf fields (recursive expansion of nested messages in the
+//    request) can be classified into three types:
+//     (a) Matched in the URL template.
+//     (b) Covered by body (if body is `*`, everything except (a) fields;
+//         else everything under the body field)
+//     (c) All other fields.
+// 3. URL query parameters found in the HTTP request are mapped to (c) fields.
+// 4. Any body sent with an HTTP request can contain only (b) fields.
+//
+// The syntax of the path template is as follows:
+//
+//     Template = "/" Segments [ Verb ] ;
+//     Segments = Segment { "/" Segment } ;
+//     Segment  = "*" | "**" | LITERAL | Variable ;
+//     Variable = "{" FieldPath [ "=" Segments ] "}" ;
+//     FieldPath = IDENT { "." IDENT } ;
+//     Verb     = ":" LITERAL ;
+//
+// The syntax `*` matches a single path segment. It follows the semantics of
+// [RFC 6570](https://tools.ietf.org/html/rfc6570) Section 3.2.2 Simple String
+// Expansion.
+//
+// The syntax `**` matches zero or more path segments. It follows the semantics
+// of [RFC 6570](https://tools.ietf.org/html/rfc6570) Section 3.2.3 Reserved
+// Expansion. NOTE: it must be the last segment in the path except the Verb.
+//
+// The syntax `LITERAL` matches literal text in the URL path.
+//
+// The syntax `Variable` matches the entire path as specified by its template;
+// this nested template must not contain further variables. If a variable
+// matches a single path segment, its template may be omitted, e.g. `{var}`
+// is equivalent to `{var=*}`.
+//
+// NOTE: the field paths in variables and in the `body` must not refer to
+// repeated fields or map fields.
+//
+// Use CustomHttpPattern to specify any HTTP method that is not included in the
+// `pattern` field, such as HEAD, or "*" to leave the HTTP method unspecified for
+// a given URL path rule. The wild-card rule is useful for services that provide
+// content to Web (HTML) clients.
+type HttpRule struct {
+	// Selects methods to which this rule applies.
+	//
+	// Refer to [selector][google.api.DocumentationRule.selector] for syntax details.
+	Selector string `protobuf:"bytes,1,opt,name=selector" json:"selector,omitempty"`
+	// Determines the URL pattern is matched by this rules. This pattern can be
+	// used with any of the {get|put|post|delete|patch} methods. A custom method
+	// can be defined using the 'custom' field.
+	//
+	// Types that are valid to be assigned to Pattern:
+	//	*HttpRule_Get
+	//	*HttpRule_Put
+	//	*HttpRule_Post
+	//	*HttpRule_Delete
+	//	*HttpRule_Patch
+	//	*HttpRule_Custom
+	Pattern isHttpRule_Pattern `protobuf_oneof:"pattern"`
+	// The name of the request field whose value is mapped to the HTTP body, or
+	// `*` for mapping all fields not captured by the path pattern to the HTTP
+	// body. NOTE: the referred field must not be a repeated field and must be
+	// present at the top-level of request message type.
+	Body string `protobuf:"bytes,7,opt,name=body" json:"body,omitempty"`
+	// Additional HTTP bindings for the selector. Nested bindings must
+	// not contain an `additional_bindings` field themselves (that is,
+	// the nesting may only be one level deep).
+	AdditionalBindings []*HttpRule `protobuf:"bytes,11,rep,name=additional_bindings,json=additionalBindings" json:"additional_bindings,omitempty"`
+}
+
+func (m *HttpRule) Reset()                    { *m = HttpRule{} }
+func (m *HttpRule) String() string            { return proto.CompactTextString(m) }
+func (*HttpRule) ProtoMessage()               {}
+func (*HttpRule) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+
+type isHttpRule_Pattern interface {
+	isHttpRule_Pattern()
+}
+
+type HttpRule_Get struct {
+	Get string `protobuf:"bytes,2,opt,name=get,oneof"`
+}
+type HttpRule_Put struct {
+	Put string `protobuf:"bytes,3,opt,name=put,oneof"`
+}
+type HttpRule_Post struct {
+	Post string `protobuf:"bytes,4,opt,name=post,oneof"`
+}
+type HttpRule_Delete struct {
+	Delete string `protobuf:"bytes,5,opt,name=delete,oneof"`
+}
+type HttpRule_Patch struct {
+	Patch string `protobuf:"bytes,6,opt,name=patch,oneof"`
+}
+type HttpRule_Custom struct {
+	Custom *CustomHttpPattern `protobuf:"bytes,8,opt,name=custom,oneof"`
+}
+
+func (*HttpRule_Get) isHttpRule_Pattern()    {}
+func (*HttpRule_Put) isHttpRule_Pattern()    {}
+func (*HttpRule_Post) isHttpRule_Pattern()   {}
+func (*HttpRule_Delete) isHttpRule_Pattern() {}
+func (*HttpRule_Patch) isHttpRule_Pattern()  {}
+func (*HttpRule_Custom) isHttpRule_Pattern() {}
+
+func (m *HttpRule) GetPattern() isHttpRule_Pattern {
+	if m != nil {
+		return m.Pattern
+	}
+	return nil
+}
+
+func (m *HttpRule) GetSelector() string {
+	if m != nil {
+		return m.Selector
+	}
+	return ""
+}
+
+func (m *HttpRule) GetGet() string {
+	if x, ok := m.GetPattern().(*HttpRule_Get); ok {
+		return x.Get
+	}
+	return ""
+}
+
+func (m *HttpRule) GetPut() string {
+	if x, ok := m.GetPattern().(*HttpRule_Put); ok {
+		return x.Put
+	}
+	return ""
+}
+
+func (m *HttpRule) GetPost() string {
+	if x, ok := m.GetPattern().(*HttpRule_Post); ok {
+		return x.Post
+	}
+	return ""
+}
+
+func (m *HttpRule) GetDelete() string {
+	if x, ok := m.GetPattern().(*HttpRule_Delete); ok {
+		return x.Delete
+	}
+	return ""
+}
+
+func (m *HttpRule) GetPatch() string {
+	if x, ok := m.GetPattern().(*HttpRule_Patch); ok {
+		return x.Patch
+	}
+	return ""
+}
+
+func (m *HttpRule) GetCustom() *CustomHttpPattern {
+	if x, ok := m.GetPattern().(*HttpRule_Custom); ok {
+		return x.Custom
+	}
+	return nil
+}
+
+func (m *HttpRule) GetBody() string {
+	if m != nil {
+		return m.Body
+	}
+	return ""
+}
+
+func (m *HttpRule) GetAdditionalBindings() []*HttpRule {
+	if m != nil {
+		return m.AdditionalBindings
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*HttpRule) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _HttpRule_OneofMarshaler, _HttpRule_OneofUnmarshaler, _HttpRule_OneofSizer, []interface{}{
+		(*HttpRule_Get)(nil),
+		(*HttpRule_Put)(nil),
+		(*HttpRule_Post)(nil),
+		(*HttpRule_Delete)(nil),
+		(*HttpRule_Patch)(nil),
+		(*HttpRule_Custom)(nil),
+	}
+}
+
+func _HttpRule_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*HttpRule)
+	// pattern
+	switch x := m.Pattern.(type) {
+	case *HttpRule_Get:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Get)
+	case *HttpRule_Put:
+		b.EncodeVarint(3<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Put)
+	case *HttpRule_Post:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Post)
+	case *HttpRule_Delete:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Delete)
+	case *HttpRule_Patch:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.Patch)
+	case *HttpRule_Custom:
+		b.EncodeVarint(8<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Custom); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("HttpRule.Pattern has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _HttpRule_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*HttpRule)
+	switch tag {
+	case 2: // pattern.get
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Pattern = &HttpRule_Get{x}
+		return true, err
+	case 3: // pattern.put
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Pattern = &HttpRule_Put{x}
+		return true, err
+	case 4: // pattern.post
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Pattern = &HttpRule_Post{x}
+		return true, err
+	case 5: // pattern.delete
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Pattern = &HttpRule_Delete{x}
+		return true, err
+	case 6: // pattern.patch
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Pattern = &HttpRule_Patch{x}
+		return true, err
+	case 8: // pattern.custom
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(CustomHttpPattern)
+		err := b.DecodeMessage(msg)
+		m.Pattern = &HttpRule_Custom{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _HttpRule_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*HttpRule)
+	// pattern
+	switch x := m.Pattern.(type) {
+	case *HttpRule_Get:
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.Get)))
+		n += len(x.Get)
+	case *HttpRule_Put:
+		n += proto.SizeVarint(3<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.Put)))
+		n += len(x.Put)
+	case *HttpRule_Post:
+		n += proto.SizeVarint(4<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.Post)))
+		n += len(x.Post)
+	case *HttpRule_Delete:
+		n += proto.SizeVarint(5<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.Delete)))
+		n += len(x.Delete)
+	case *HttpRule_Patch:
+		n += proto.SizeVarint(6<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.Patch)))
+		n += len(x.Patch)
+	case *HttpRule_Custom:
+		s := proto.Size(x.Custom)
+		n += proto.SizeVarint(8<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// A custom pattern is used for defining custom HTTP verb.
+type CustomHttpPattern struct {
+	// The name of this custom HTTP verb.
+	Kind string `protobuf:"bytes,1,opt,name=kind" json:"kind,omitempty"`
+	// The path matched by this custom verb.
+	Path string `protobuf:"bytes,2,opt,name=path" json:"path,omitempty"`
+}
+
+func (m *CustomHttpPattern) Reset()                    { *m = CustomHttpPattern{} }
+func (m *CustomHttpPattern) String() string            { return proto.CompactTextString(m) }
+func (*CustomHttpPattern) ProtoMessage()               {}
+func (*CustomHttpPattern) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{2} }
+
+func (m *CustomHttpPattern) GetKind() string {
+	if m != nil {
+		return m.Kind
+	}
+	return ""
+}
+
+func (m *CustomHttpPattern) GetPath() string {
+	if m != nil {
+		return m.Path
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*Http)(nil), "google.api.Http")
+	proto.RegisterType((*HttpRule)(nil), "google.api.HttpRule")
+	proto.RegisterType((*CustomHttpPattern)(nil), "google.api.CustomHttpPattern")
+}
+
+func init() { proto.RegisterFile("google/api/http.proto", fileDescriptor1) }
+
+var fileDescriptor1 = []byte{
+	// 359 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x92, 0xcf, 0x6a, 0xe3, 0x30,
+	0x10, 0xc6, 0xd7, 0x89, 0xe3, 0x24, 0x13, 0x58, 0x58, 0x6d, 0x76, 0x11, 0x85, 0x42, 0xc8, 0x29,
+	0xf4, 0x60, 0x43, 0x7a, 0xe8, 0x21, 0xa7, 0xb8, 0x94, 0xa6, 0xb7, 0xe0, 0x63, 0x2f, 0x45, 0xb1,
+	0x85, 0xa2, 0xd6, 0x91, 0x84, 0x3d, 0x3e, 0xf4, 0x75, 0xfa, 0x0e, 0x7d, 0xb7, 0x1e, 0x8b, 0xfe,
+	0xa4, 0x09, 0x14, 0x7a, 0x9b, 0xef, 0x37, 0x9f, 0x34, 0xa3, 0x19, 0xc1, 0x3f, 0xa1, 0xb5, 0xa8,
+	0x79, 0xc6, 0x8c, 0xcc, 0xf6, 0x88, 0x26, 0x35, 0x8d, 0x46, 0x4d, 0xc0, 0xe3, 0x94, 0x19, 0x39,
+	0x5f, 0x42, 0xbc, 0x41, 0x34, 0xe4, 0x0a, 0x06, 0x4d, 0x57, 0xf3, 0x96, 0x46, 0xb3, 0xfe, 0x62,
+	0xb2, 0x9c, 0xa6, 0x27, 0x4f, 0x6a, 0x0d, 0x45, 0x57, 0xf3, 0xc2, 0x5b, 0xe6, 0xef, 0x3d, 0x18,
+	0x1d, 0x19, 0xb9, 0x80, 0x51, 0xcb, 0x6b, 0x5e, 0xa2, 0x6e, 0x68, 0x34, 0x8b, 0x16, 0xe3, 0xe2,
+	0x4b, 0x13, 0x02, 0x7d, 0xc1, 0x91, 0xf6, 0x2c, 0xde, 0xfc, 0x2a, 0xac, 0xb0, 0xcc, 0x74, 0x48,
+	0xfb, 0x47, 0x66, 0x3a, 0x24, 0x53, 0x88, 0x8d, 0x6e, 0x91, 0xc6, 0x01, 0x3a, 0x45, 0x28, 0x24,
+	0x15, 0xaf, 0x39, 0x72, 0x3a, 0x08, 0x3c, 0x68, 0xf2, 0x1f, 0x06, 0x86, 0x61, 0xb9, 0xa7, 0x49,
+	0x48, 0x78, 0x49, 0x6e, 0x20, 0x29, 0xbb, 0x16, 0xf5, 0x81, 0x8e, 0x66, 0xd1, 0x62, 0xb2, 0xbc,
+	0x3c, 0x7f, 0xc5, 0xad, 0xcb, 0xd8, 0xbe, 0xb7, 0x0c, 0x91, 0x37, 0xca, 0x5e, 0xe8, 0xed, 0x84,
+	0x40, 0xbc, 0xd3, 0xd5, 0x2b, 0x1d, 0xba, 0x07, 0xb8, 0x98, 0xdc, 0xc1, 0x5f, 0x56, 0x55, 0x12,
+	0xa5, 0x56, 0xac, 0x7e, 0xda, 0x49, 0x55, 0x49, 0x25, 0x5a, 0x3a, 0xf9, 0x61, 0x3e, 0xe4, 0x74,
+	0x20, 0x0f, 0xfe, 0x7c, 0x0c, 0x43, 0xe3, 0xeb, 0xcd, 0x57, 0xf0, 0xe7, 0x5b, 0x13, 0xb6, 0xf4,
+	0x8b, 0x54, 0x55, 0x98, 0x9d, 0x8b, 0x2d, 0x33, 0x0c, 0xf7, 0x7e, 0x70, 0x85, 0x8b, 0xf3, 0x67,
+	0xf8, 0x5d, 0xea, 0xc3, 0x59, 0xd9, 0x7c, 0xec, 0xae, 0xb1, 0x1b, 0xdd, 0x46, 0x8f, 0xeb, 0x90,
+	0x10, 0xba, 0x66, 0x4a, 0xa4, 0xba, 0x11, 0x99, 0xe0, 0xca, 0xed, 0x3b, 0xf3, 0x29, 0x66, 0x64,
+	0xeb, 0x7e, 0x02, 0x53, 0x4a, 0x23, 0xb3, 0x6d, 0xb6, 0xab, 0xb3, 0xf8, 0x23, 0x8a, 0xde, 0x7a,
+	0xf1, 0xfd, 0x7a, 0xfb, 0xb0, 0x4b, 0xdc, 0xb9, 0xeb, 0xcf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x68,
+	0x15, 0x60, 0x5b, 0x40, 0x02, 0x00, 0x00,
+}

vendor/google.golang.org/genproto/googleapis/iam/v1/iam_policy.pb.go

@@ -0,0 +1,337 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/iam/v1/iam_policy.proto
+
+/*
+Package iam is a generated protocol buffer package.
+
+It is generated from these files:
+	google/iam/v1/iam_policy.proto
+	google/iam/v1/policy.proto
+
+It has these top-level messages:
+	SetIamPolicyRequest
+	GetIamPolicyRequest
+	TestIamPermissionsRequest
+	TestIamPermissionsResponse
+	Policy
+	Binding
+	PolicyDelta
+	BindingDelta
+*/
+package iam
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import _ "google.golang.org/genproto/googleapis/api/annotations"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// Request message for `SetIamPolicy` method.
+type SetIamPolicyRequest struct {
+	// REQUIRED: The resource for which the policy is being specified.
+	// `resource` is usually specified as a path. For example, a Project
+	// resource is specified as `projects/{project}`.
+	Resource string `protobuf:"bytes,1,opt,name=resource" json:"resource,omitempty"`
+	// REQUIRED: The complete policy to be applied to the `resource`. The size of
+	// the policy is limited to a few 10s of KB. An empty policy is a
+	// valid policy but certain Cloud Platform services (such as Projects)
+	// might reject them.
+	Policy *Policy `protobuf:"bytes,2,opt,name=policy" json:"policy,omitempty"`
+}
+
+func (m *SetIamPolicyRequest) Reset()                    { *m = SetIamPolicyRequest{} }
+func (m *SetIamPolicyRequest) String() string            { return proto.CompactTextString(m) }
+func (*SetIamPolicyRequest) ProtoMessage()               {}
+func (*SetIamPolicyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *SetIamPolicyRequest) GetResource() string {
+	if m != nil {
+		return m.Resource
+	}
+	return ""
+}
+
+func (m *SetIamPolicyRequest) GetPolicy() *Policy {
+	if m != nil {
+		return m.Policy
+	}
+	return nil
+}
+
+// Request message for `GetIamPolicy` method.
+type GetIamPolicyRequest struct {
+	// REQUIRED: The resource for which the policy is being requested.
+	// `resource` is usually specified as a path. For example, a Project
+	// resource is specified as `projects/{project}`.
+	Resource string `protobuf:"bytes,1,opt,name=resource" json:"resource,omitempty"`
+}
+
+func (m *GetIamPolicyRequest) Reset()                    { *m = GetIamPolicyRequest{} }
+func (m *GetIamPolicyRequest) String() string            { return proto.CompactTextString(m) }
+func (*GetIamPolicyRequest) ProtoMessage()               {}
+func (*GetIamPolicyRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *GetIamPolicyRequest) GetResource() string {
+	if m != nil {
+		return m.Resource
+	}
+	return ""
+}
+
+// Request message for `TestIamPermissions` method.
+type TestIamPermissionsRequest struct {
+	// REQUIRED: The resource for which the policy detail is being requested.
+	// `resource` is usually specified as a path. For example, a Project
+	// resource is specified as `projects/{project}`.
+	Resource string `protobuf:"bytes,1,opt,name=resource" json:"resource,omitempty"`
+	// The set of permissions to check for the `resource`. Permissions with
+	// wildcards (such as '*' or 'storage.*') are not allowed. For more
+	// information see
+	// [IAM Overview](https://cloud.google.com/iam/docs/overview#permissions).
+	Permissions []string `protobuf:"bytes,2,rep,name=permissions" json:"permissions,omitempty"`
+}
+
+func (m *TestIamPermissionsRequest) Reset()                    { *m = TestIamPermissionsRequest{} }
+func (m *TestIamPermissionsRequest) String() string            { return proto.CompactTextString(m) }
+func (*TestIamPermissionsRequest) ProtoMessage()               {}
+func (*TestIamPermissionsRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func (m *TestIamPermissionsRequest) GetResource() string {
+	if m != nil {
+		return m.Resource
+	}
+	return ""
+}
+
+func (m *TestIamPermissionsRequest) GetPermissions() []string {
+	if m != nil {
+		return m.Permissions
+	}
+	return nil
+}
+
+// Response message for `TestIamPermissions` method.
+type TestIamPermissionsResponse struct {
+	// A subset of `TestPermissionsRequest.permissions` that the caller is
+	// allowed.
+	Permissions []string `protobuf:"bytes,1,rep,name=permissions" json:"permissions,omitempty"`
+}
+
+func (m *TestIamPermissionsResponse) Reset()                    { *m = TestIamPermissionsResponse{} }
+func (m *TestIamPermissionsResponse) String() string            { return proto.CompactTextString(m) }
+func (*TestIamPermissionsResponse) ProtoMessage()               {}
+func (*TestIamPermissionsResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func (m *TestIamPermissionsResponse) GetPermissions() []string {
+	if m != nil {
+		return m.Permissions
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*SetIamPolicyRequest)(nil), "google.iam.v1.SetIamPolicyRequest")
+	proto.RegisterType((*GetIamPolicyRequest)(nil), "google.iam.v1.GetIamPolicyRequest")
+	proto.RegisterType((*TestIamPermissionsRequest)(nil), "google.iam.v1.TestIamPermissionsRequest")
+	proto.RegisterType((*TestIamPermissionsResponse)(nil), "google.iam.v1.TestIamPermissionsResponse")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for IAMPolicy service
+
+type IAMPolicyClient interface {
+	// Sets the access control policy on the specified resource. Replaces any
+	// existing policy.
+	SetIamPolicy(ctx context.Context, in *SetIamPolicyRequest, opts ...grpc.CallOption) (*Policy, error)
+	// Gets the access control policy for a resource.
+	// Returns an empty policy if the resource exists and does not have a policy
+	// set.
+	GetIamPolicy(ctx context.Context, in *GetIamPolicyRequest, opts ...grpc.CallOption) (*Policy, error)
+	// Returns permissions that a caller has on the specified resource.
+	// If the resource does not exist, this will return an empty set of
+	// permissions, not a NOT_FOUND error.
+	TestIamPermissions(ctx context.Context, in *TestIamPermissionsRequest, opts ...grpc.CallOption) (*TestIamPermissionsResponse, error)
+}
+
+type iAMPolicyClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewIAMPolicyClient(cc *grpc.ClientConn) IAMPolicyClient {
+	return &iAMPolicyClient{cc}
+}
+
+func (c *iAMPolicyClient) SetIamPolicy(ctx context.Context, in *SetIamPolicyRequest, opts ...grpc.CallOption) (*Policy, error) {
+	out := new(Policy)
+	err := grpc.Invoke(ctx, "/google.iam.v1.IAMPolicy/SetIamPolicy", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *iAMPolicyClient) GetIamPolicy(ctx context.Context, in *GetIamPolicyRequest, opts ...grpc.CallOption) (*Policy, error) {
+	out := new(Policy)
+	err := grpc.Invoke(ctx, "/google.iam.v1.IAMPolicy/GetIamPolicy", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *iAMPolicyClient) TestIamPermissions(ctx context.Context, in *TestIamPermissionsRequest, opts ...grpc.CallOption) (*TestIamPermissionsResponse, error) {
+	out := new(TestIamPermissionsResponse)
+	err := grpc.Invoke(ctx, "/google.iam.v1.IAMPolicy/TestIamPermissions", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for IAMPolicy service
+
+type IAMPolicyServer interface {
+	// Sets the access control policy on the specified resource. Replaces any
+	// existing policy.
+	SetIamPolicy(context.Context, *SetIamPolicyRequest) (*Policy, error)
+	// Gets the access control policy for a resource.
+	// Returns an empty policy if the resource exists and does not have a policy
+	// set.
+	GetIamPolicy(context.Context, *GetIamPolicyRequest) (*Policy, error)
+	// Returns permissions that a caller has on the specified resource.
+	// If the resource does not exist, this will return an empty set of
+	// permissions, not a NOT_FOUND error.
+	TestIamPermissions(context.Context, *TestIamPermissionsRequest) (*TestIamPermissionsResponse, error)
+}
+
+func RegisterIAMPolicyServer(s *grpc.Server, srv IAMPolicyServer) {
+	s.RegisterService(&_IAMPolicy_serviceDesc, srv)
+}
+
+func _IAMPolicy_SetIamPolicy_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SetIamPolicyRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(IAMPolicyServer).SetIamPolicy(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.iam.v1.IAMPolicy/SetIamPolicy",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(IAMPolicyServer).SetIamPolicy(ctx, req.(*SetIamPolicyRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _IAMPolicy_GetIamPolicy_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetIamPolicyRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(IAMPolicyServer).GetIamPolicy(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.iam.v1.IAMPolicy/GetIamPolicy",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(IAMPolicyServer).GetIamPolicy(ctx, req.(*GetIamPolicyRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _IAMPolicy_TestIamPermissions_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(TestIamPermissionsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(IAMPolicyServer).TestIamPermissions(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.iam.v1.IAMPolicy/TestIamPermissions",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(IAMPolicyServer).TestIamPermissions(ctx, req.(*TestIamPermissionsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _IAMPolicy_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "google.iam.v1.IAMPolicy",
+	HandlerType: (*IAMPolicyServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SetIamPolicy",
+			Handler:    _IAMPolicy_SetIamPolicy_Handler,
+		},
+		{
+			MethodName: "GetIamPolicy",
+			Handler:    _IAMPolicy_GetIamPolicy_Handler,
+		},
+		{
+			MethodName: "TestIamPermissions",
+			Handler:    _IAMPolicy_TestIamPermissions_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "google/iam/v1/iam_policy.proto",
+}
+
+func init() { proto.RegisterFile("google/iam/v1/iam_policy.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 396 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x53, 0xcf, 0x4a, 0xe3, 0x40,
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+	0x00, 0x00, 0xff, 0xff, 0x6c, 0x3a, 0x2b, 0x4d, 0xaa, 0x03, 0x00, 0x00,
+}

vendor/google.golang.org/genproto/googleapis/iam/v1/policy.pb.go

@@ -0,0 +1,269 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/iam/v1/policy.proto
+
+package iam
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import _ "google.golang.org/genproto/googleapis/api/annotations"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// The type of action performed on a Binding in a policy.
+type BindingDelta_Action int32
+
+const (
+	// Unspecified.
+	BindingDelta_ACTION_UNSPECIFIED BindingDelta_Action = 0
+	// Addition of a Binding.
+	BindingDelta_ADD BindingDelta_Action = 1
+	// Removal of a Binding.
+	BindingDelta_REMOVE BindingDelta_Action = 2
+)
+
+var BindingDelta_Action_name = map[int32]string{
+	0: "ACTION_UNSPECIFIED",
+	1: "ADD",
+	2: "REMOVE",
+}
+var BindingDelta_Action_value = map[string]int32{
+	"ACTION_UNSPECIFIED": 0,
+	"ADD":                1,
+	"REMOVE":             2,
+}
+
+func (x BindingDelta_Action) String() string {
+	return proto.EnumName(BindingDelta_Action_name, int32(x))
+}
+func (BindingDelta_Action) EnumDescriptor() ([]byte, []int) { return fileDescriptor1, []int{3, 0} }
+
+// Defines an Identity and Access Management (IAM) policy. It is used to
+// specify access control policies for Cloud Platform resources.
+//
+//
+// A `Policy` consists of a list of `bindings`. A `Binding` binds a list of
+// `members` to a `role`, where the members can be user accounts, Google groups,
+// Google domains, and service accounts. A `role` is a named list of permissions
+// defined by IAM.
+//
+// **Example**
+//
+//     {
+//       "bindings": [
+//         {
+//           "role": "roles/owner",
+//           "members": [
+//             "user:mike@example.com",
+//             "group:admins@example.com",
+//             "domain:google.com",
+//             "serviceAccount:my-other-app@appspot.gserviceaccount.com",
+//           ]
+//         },
+//         {
+//           "role": "roles/viewer",
+//           "members": ["user:sean@example.com"]
+//         }
+//       ]
+//     }
+//
+// For a description of IAM and its features, see the
+// [IAM developer's guide](https://cloud.google.com/iam).
+type Policy struct {
+	// Version of the `Policy`. The default version is 0.
+	Version int32 `protobuf:"varint,1,opt,name=version" json:"version,omitempty"`
+	// Associates a list of `members` to a `role`.
+	// Multiple `bindings` must not be specified for the same `role`.
+	// `bindings` with no members will result in an error.
+	Bindings []*Binding `protobuf:"bytes,4,rep,name=bindings" json:"bindings,omitempty"`
+	// `etag` is used for optimistic concurrency control as a way to help
+	// prevent simultaneous updates of a policy from overwriting each other.
+	// It is strongly suggested that systems make use of the `etag` in the
+	// read-modify-write cycle to perform policy updates in order to avoid race
+	// conditions: An `etag` is returned in the response to `getIamPolicy`, and
+	// systems are expected to put that etag in the request to `setIamPolicy` to
+	// ensure that their change will be applied to the same version of the policy.
+	//
+	// If no `etag` is provided in the call to `setIamPolicy`, then the existing
+	// policy is overwritten blindly.
+	Etag []byte `protobuf:"bytes,3,opt,name=etag,proto3" json:"etag,omitempty"`
+}
+
+func (m *Policy) Reset()                    { *m = Policy{} }
+func (m *Policy) String() string            { return proto.CompactTextString(m) }
+func (*Policy) ProtoMessage()               {}
+func (*Policy) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+func (m *Policy) GetVersion() int32 {
+	if m != nil {
+		return m.Version
+	}
+	return 0
+}
+
+func (m *Policy) GetBindings() []*Binding {
+	if m != nil {
+		return m.Bindings
+	}
+	return nil
+}
+
+func (m *Policy) GetEtag() []byte {
+	if m != nil {
+		return m.Etag
+	}
+	return nil
+}
+
+// Associates `members` with a `role`.
+type Binding struct {
+	// Role that is assigned to `members`.
+	// For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+	// Required
+	Role string `protobuf:"bytes,1,opt,name=role" json:"role,omitempty"`
+	// Specifies the identities requesting access for a Cloud Platform resource.
+	// `members` can have the following values:
+	//
+	// * `allUsers`: A special identifier that represents anyone who is
+	//    on the internet; with or without a Google account.
+	//
+	// * `allAuthenticatedUsers`: A special identifier that represents anyone
+	//    who is authenticated with a Google account or a service account.
+	//
+	// * `user:{emailid}`: An email address that represents a specific Google
+	//    account. For example, `alice@gmail.com` or `joe@example.com`.
+	//
+	//
+	// * `serviceAccount:{emailid}`: An email address that represents a service
+	//    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+	//
+	// * `group:{emailid}`: An email address that represents a Google group.
+	//    For example, `admins@example.com`.
+	//
+	// * `domain:{domain}`: A Google Apps domain name that represents all the
+	//    users of that domain. For example, `google.com` or `example.com`.
+	//
+	//
+	Members []string `protobuf:"bytes,2,rep,name=members" json:"members,omitempty"`
+}
+
+func (m *Binding) Reset()                    { *m = Binding{} }
+func (m *Binding) String() string            { return proto.CompactTextString(m) }
+func (*Binding) ProtoMessage()               {}
+func (*Binding) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+
+func (m *Binding) GetRole() string {
+	if m != nil {
+		return m.Role
+	}
+	return ""
+}
+
+func (m *Binding) GetMembers() []string {
+	if m != nil {
+		return m.Members
+	}
+	return nil
+}
+
+// The difference delta between two policies.
+type PolicyDelta struct {
+	// The delta for Bindings between two policies.
+	BindingDeltas []*BindingDelta `protobuf:"bytes,1,rep,name=binding_deltas,json=bindingDeltas" json:"binding_deltas,omitempty"`
+}
+
+func (m *PolicyDelta) Reset()                    { *m = PolicyDelta{} }
+func (m *PolicyDelta) String() string            { return proto.CompactTextString(m) }
+func (*PolicyDelta) ProtoMessage()               {}
+func (*PolicyDelta) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{2} }
+
+func (m *PolicyDelta) GetBindingDeltas() []*BindingDelta {
+	if m != nil {
+		return m.BindingDeltas
+	}
+	return nil
+}
+
+// One delta entry for Binding. Each individual change (only one member in each
+// entry) to a binding will be a separate entry.
+type BindingDelta struct {
+	// The action that was performed on a Binding.
+	// Required
+	Action BindingDelta_Action `protobuf:"varint,1,opt,name=action,enum=google.iam.v1.BindingDelta_Action" json:"action,omitempty"`
+	// Role that is assigned to `members`.
+	// For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+	// Required
+	Role string `protobuf:"bytes,2,opt,name=role" json:"role,omitempty"`
+	// A single identity requesting access for a Cloud Platform resource.
+	// Follows the same format of Binding.members.
+	// Required
+	Member string `protobuf:"bytes,3,opt,name=member" json:"member,omitempty"`
+}
+
+func (m *BindingDelta) Reset()                    { *m = BindingDelta{} }
+func (m *BindingDelta) String() string            { return proto.CompactTextString(m) }
+func (*BindingDelta) ProtoMessage()               {}
+func (*BindingDelta) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{3} }
+
+func (m *BindingDelta) GetAction() BindingDelta_Action {
+	if m != nil {
+		return m.Action
+	}
+	return BindingDelta_ACTION_UNSPECIFIED
+}
+
+func (m *BindingDelta) GetRole() string {
+	if m != nil {
+		return m.Role
+	}
+	return ""
+}
+
+func (m *BindingDelta) GetMember() string {
+	if m != nil {
+		return m.Member
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*Policy)(nil), "google.iam.v1.Policy")
+	proto.RegisterType((*Binding)(nil), "google.iam.v1.Binding")
+	proto.RegisterType((*PolicyDelta)(nil), "google.iam.v1.PolicyDelta")
+	proto.RegisterType((*BindingDelta)(nil), "google.iam.v1.BindingDelta")
+	proto.RegisterEnum("google.iam.v1.BindingDelta_Action", BindingDelta_Action_name, BindingDelta_Action_value)
+}
+
+func init() { proto.RegisterFile("google/iam/v1/policy.proto", fileDescriptor1) }
+
+var fileDescriptor1 = []byte{
+	// 387 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x52, 0x4d, 0x8f, 0xd3, 0x30,
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+	0x8a, 0xb7, 0x5d, 0x38, 0x5a, 0x8c, 0xe3, 0x29, 0x3d, 0xc0, 0xe8, 0x13, 0x9c, 0xbb, 0x90, 0x19,
+	0xaf, 0x7b, 0x86, 0x53, 0xb8, 0xf2, 0x7d, 0xee, 0x77, 0xc3, 0x87, 0x2e, 0x44, 0x36, 0xd5, 0xf3,
+	0x7f, 0xa7, 0xb2, 0x26, 0x7a, 0x59, 0x1d, 0xa1, 0x2e, 0xfa, 0x8d, 0xe0, 0xe2, 0x98, 0xc7, 0x6f,
+	0x21, 0x60, 0xdb, 0xfe, 0x30, 0xfd, 0xd5, 0x2a, 0xfa, 0xcf, 0xcf, 0xc8, 0xda, 0x2a, 0xa9, 0x77,
+	0x3c, 0x4c, 0x33, 0x3a, 0x9a, 0x66, 0x0e, 0x81, 0x8b, 0x6f, 0x57, 0x30, 0xa5, 0x1e, 0x45, 0xaf,
+	0x21, 0x70, 0x6e, 0x3c, 0x07, 0xbc, 0xde, 0x7c, 0x29, 0x6e, 0x6f, 0xee, 0xbf, 0xde, 0x7c, 0x2e,
+	0xf3, 0x4d, 0xf1, 0xbe, 0xc8, 0xb3, 0xd9, 0x23, 0x3c, 0x81, 0xf1, 0x3a, 0xcb, 0x66, 0x08, 0x03,
+	0x04, 0x34, 0xff, 0x78, 0x7b, 0x97, 0xcf, 0x46, 0xa9, 0x82, 0xa7, 0x5b, 0xa3, 0x4e, 0x33, 0xa5,
+	0x7e, 0x2b, 0xe5, 0x70, 0xc9, 0x12, 0x7d, 0x7b, 0xe9, 0x59, 0x61, 0x6a, 0xa6, 0x05, 0x31, 0xad,
+	0x48, 0x04, 0xd7, 0xf6, 0xce, 0x89, 0xa3, 0x58, 0x23, 0x3b, 0xff, 0x66, 0xde, 0x49, 0xa6, 0xfe,
+	0x20, 0xf4, 0x6b, 0xf4, 0xec, 0x83, 0x73, 0x6d, 0x6a, 0xf3, 0x63, 0x47, 0x0a, 0xa6, 0xc8, 0xdd,
+	0xb2, 0x0a, 0xac, 0xeb, 0xd5, 0xdf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x8c, 0x4a, 0x85, 0x10, 0x68,
+	0x02, 0x00, 0x00,
+}

vendor/vendor.json

@@ -8,12 +8,36 @@
 			"revision": "81b7822b1e798e8f17bf64b59512a5be4097e966",
 			"revisionTime": "2017-01-18T16:13:56Z"
 		},
+		{
+			"checksumSHA1": "/ixPd+hSgsbAjBI/fPqmHtTFRM8=",
+			"path": "cloud.google.com/go/iam",
+			"revision": "eaddaf6dd7ee35fd3c2420c8d27478db176b0485",
+			"revisionTime": "2017-10-03T12:23:38Z"
+		},
 		{
 			"checksumSHA1": "4iounbuF7SMZdx/MlKSUuhnV848=",
 			"path": "cloud.google.com/go/internal",
 			"revision": "81b7822b1e798e8f17bf64b59512a5be4097e966",
 			"revisionTime": "2017-01-18T16:13:56Z"
 		},
+		{
+			"checksumSHA1": "MCns2LLZtUZEx6JWyYBrcbSuTXg=",
+			"path": "cloud.google.com/go/internal/optional",
+			"revision": "eaddaf6dd7ee35fd3c2420c8d27478db176b0485",
+			"revisionTime": "2017-10-03T12:23:38Z"
+		},
+		{
+			"checksumSHA1": "QXE70x1YpmwfX8bqcncO5LxjeEA=",
+			"path": "cloud.google.com/go/internal/version",
+			"revision": "eaddaf6dd7ee35fd3c2420c8d27478db176b0485",
+			"revisionTime": "2017-10-03T12:23:38Z"
+		},
+		{
+			"checksumSHA1": "T1qOkeLqtHSFaUsekS+scNweNO4=",
+			"path": "cloud.google.com/go/storage",
+			"revision": "eaddaf6dd7ee35fd3c2420c8d27478db176b0485",
+			"revisionTime": "2017-10-03T12:23:38Z"
+		},
 		{
 			"checksumSHA1": "mD5cAEaOLqhUeaFHbE8CLkZwM0M=",
 			"path": "github.com/Azure/azure-sdk-for-go/arm/resources/resources",
@@ -1040,6 +1064,12 @@
 			"revision": "8ee79997227bf9b34611aee7946ae64735e6fd93",
 			"revisionTime": "2016-11-17T03:31:26Z"
 		},
+		{
+			"checksumSHA1": "XNHQiRltA7NQJV0RvUroY+cf+zg=",
+			"path": "github.com/golang/protobuf/protoc-gen-go/descriptor",
+			"revision": "130e6b02ab059e7b717a096f397c5b60111cae74",
+			"revisionTime": "2017-09-20T22:06:47Z"
+		},
 		{
 			"checksumSHA1": "5UJZd7Zyo40vk1OjMTy6LWjTcss=",
 			"path": "github.com/golang/protobuf/ptypes",
@@ -2238,10 +2268,10 @@
 			"revisionTime": "2016-12-14T09:25:55Z"
 		},
 		{
-			"checksumSHA1": "rEzA1cW2NdfF9ndGQHTNzE5+mF4=",
+			"checksumSHA1": "JTBn9MQUhwHtjwv7rC9Zg4KRN7g=",
 			"path": "golang.org/x/oauth2/google",
-			"revision": "314dd2c0bf3ebd592ec0d20847d27e79d0dbe8dd",
+			"revision": "bb50c06baba3d0c76f9d125c0719093e315b5b44",
-			"revisionTime": "2016-12-14T09:25:55Z"
+			"revisionTime": "2017-09-28T00:25:42Z"
 		},
 		{
 			"checksumSHA1": "2/1PJ6nxegIPdmFoqugDSlpjEfQ=",
@@ -2401,10 +2431,10 @@
 			"revisionTime": "2017-09-13T19:45:57Z"
 		},
 		{
-			"checksumSHA1": "C7k1pbU/WU4CBoBwA4EBUnV/iek=",
+			"checksumSHA1": "/y0saWnM+kTnSvZrNlvoNOgj0Uo=",
 			"path": "google.golang.org/api/gensupport",
-			"revision": "64485db7e8c8be51e572801d06cdbcfadd3546c1",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
-			"revisionTime": "2017-02-23T23:41:36Z"
+			"revisionTime": "2017-10-05T00:03:05Z"
 		},
 		{
 			"checksumSHA1": "yQREK/OWrz9PLljbr127+xFk6J0=",
@@ -2419,10 +2449,40 @@
 			"revisionTime": "2016-08-05T04:28:55Z"
 		},
 		{
-			"checksumSHA1": "xygm9BwoCg7vc0PPgAPdxNKJ38c=",
+			"checksumSHA1": "Mr2fXhMRzlQCgANFm91s536pG7E=",
+			"path": "google.golang.org/api/googleapi/transport",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
+			"revisionTime": "2017-10-05T00:03:05Z"
+		},
+		{
+			"checksumSHA1": "dENAVft6XToomTHrm5J2zFt4hgU=",
+			"path": "google.golang.org/api/internal",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
+			"revisionTime": "2017-10-05T00:03:05Z"
+		},
+		{
+			"checksumSHA1": "slcGOTGSdukEPPSN81Q5WZGmhog=",
+			"path": "google.golang.org/api/iterator",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
+			"revisionTime": "2017-10-05T00:03:05Z"
+		},
+		{
+			"checksumSHA1": "Y3CG3ZFIYfF6AhvpiBMBAGcZMV4=",
+			"path": "google.golang.org/api/option",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
+			"revisionTime": "2017-10-05T00:03:05Z"
+		},
+		{
+			"checksumSHA1": "YrusV0OMylNg/6vMjCy51PzIryo=",
 			"path": "google.golang.org/api/storage/v1",
-			"revision": "3cc2e591b550923a2c5f0ab5a803feda924d5823",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
-			"revisionTime": "2016-11-27T23:54:21Z"
+			"revisionTime": "2017-10-05T00:03:05Z"
+		},
+		{
+			"checksumSHA1": "gZqIfbw6I/Cmw/+M278M2E7JzsU=",
+			"path": "google.golang.org/api/transport/http",
+			"revision": "7a7376eff6a51c6a053fcf8e9e50bf01a20f2673",
+			"revisionTime": "2017-10-05T00:03:05Z"
 		},
 		{
 			"checksumSHA1": "NU7Al7Ud5MQZxti3Pv6YgVrzLrM=",
@@ -2464,6 +2524,18 @@
 			"path": "google.golang.org/appengine/internal/remote_api",
 			"revision": "b667a5000b082e49c6c6d16867d376a12e9490cd"
 		},
+		{
+			"checksumSHA1": "B22iMMY2vi1Q9kseWb/ZznpW8lQ=",
+			"path": "google.golang.org/genproto/googleapis/api/annotations",
+			"revision": "f676e0f3ac6395ff1a529ae59a6670878a8371a6",
+			"revisionTime": "2017-10-02T23:26:14Z"
+		},
+		{
+			"checksumSHA1": "m5IWVQJ4fVYc3b+5OrZ7BdNlvkA=",
+			"path": "google.golang.org/genproto/googleapis/iam/v1",
+			"revision": "f676e0f3ac6395ff1a529ae59a6670878a8371a6",
+			"revisionTime": "2017-10-02T23:26:14Z"
+		},
 		{
 			"checksumSHA1": "AvVpgwhxhJgjoSledwDtYrEKVE4=",
 			"path": "google.golang.org/genproto/googleapis/rpc/status",

website/docs/backends/types/gcs.html.md

@@ -8,9 +8,9 @@ description: |-
 
 # gcs
 
-**Kind: Standard (with no locking)**
+**Kind: Standard (with locking)**
 
-Stores the state as a given key in a given bucket on [Google Cloud Storage](https://cloud.google.com/storage/).
+Stores the state as an object in a configurable prefix and bucket on [Google Cloud Storage](https://cloud.google.com/storage/) (GCS).
 
 ## Example Configuration
 
@@ -18,8 +18,7 @@ Stores the state as a given key in a given bucket on [Google Cloud Storage](http
 terraform {
   backend "gcs" {
     bucket  = "tf-state-prod"
-    path    = "path/terraform.tfstate"
+    prefix  = "terraform/state"
-    project = "myproject"
   }
 }
 ```
@@ -30,9 +29,8 @@ terraform {
 data "terraform_remote_state" "foo" {
   backend = "gcs"
   config {
-    bucket  = "terraform-state-prod"
+    bucket  = "terraform-state"
-    path    = "network/terraform.tfstate"
+    prefix  = "prod"
-    project = "goopro"
   }
 }
 
@@ -49,6 +47,15 @@ resource "template_file" "bar" {
 
 The following configuration options are supported:
 
- * `bucket` - (Required) The name of the GCS bucket
+ *  `bucket` - (Required) The name of the GCS bucket.
- * `path` - (Required) The path where to place/look for state file inside the bucket
+    This name must be globally unique.
- * `credentials` / `GOOGLE_CREDENTIALS` - (Required) Google Cloud Platform account credentials in json format
+    For more information, see [Bucket Naming Guidelines](https://cloud.google.com/storage/docs/bucketnaming.html#requirements).
+ *  `credentials` / `GOOGLE_CREDENTIALS` - (Optional) Local path to Google Cloud Platform account credentials in JSON format.
+    If unset, [Google Application Default Credentials](https://developers.google.com/identity/protocols/application-default-credentials) are used.
+    The provided credentials need to have the `devstorage.read_write` scope and `WRITER` permissions on the bucket.
+ *  `prefix` - (Optional) GCS prefix inside the bucket. Named states are stored in an object called `<prefix>/<name>.tfstate`.
+ *  `path` - (Deprecated) GCS path to the state file of the default state. For backwards compatibility only, use `prefix` instead.
+ *  `project` / `GOOGLE_PROJECT` - (Optional) The project ID to which the bucket belongs. This is only used when creating a new bucket during initialization.
+    Since buckets have globally unique names, the project ID is not required to access the bucket during normal operation.
+ *  `region` / `GOOGLE_REGION` - (Optional) The region in which a new bucket is created.
+    For more information, see [Bucket Locations](https://cloud.google.com/storage/docs/bucket-locations).