vendor: switch from dep to godep

dep tool vendored too much code (100MB) including tests and unused packages.
godep vendored significantly less (12MB) without tests and unused packages.
The main advantage is that pre-Go1.9 toolchain does not run tests
of all vendor packages now.

1 files changed, 0 insertions, 524 deletions

diff --git a/vendor/cloud.google.com/go/pubsub/iterator.go b/vendor/cloud.google.com/go/pubsub/iterator.go
deleted file mode 100644
index 1709c4093..000000000
--- a/vendor/cloud.google.com/go/pubsub/iterator.go
+++ /dev/null
@@ -1,524 +0,0 @@
-// 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 pubsub
-
-import (
-	"log"
-	"sync"
-	"time"
-
-	"golang.org/x/net/context"
-	"google.golang.org/api/iterator"
-	"google.golang.org/api/support/bundler"
-	pb "google.golang.org/genproto/googleapis/pubsub/v1"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
-)
-
-type messageIterator struct {
-	impl interface {
-		next() (*Message, error)
-		stop()
-	}
-}
-
-type pollingMessageIterator struct {
-	// kaTicker controls how often we send an ack deadline extension request.
-	kaTicker *time.Ticker
-	// ackTicker controls how often we acknowledge a batch of messages.
-	ackTicker *time.Ticker
-
-	ka     *keepAlive
-	acker  *acker
-	nacker *bundler.Bundler
-	puller *puller
-
-	// mu ensures that cleanup only happens once, and concurrent Stop
-	// invocations block until cleanup completes.
-	mu sync.Mutex
-
-	// closed is used to signal that Stop has been called.
-	closed chan struct{}
-}
-
-var useStreamingPull = false
-
-// newMessageIterator starts a new messageIterator.  Stop must be called on the messageIterator
-// when it is no longer needed.
-// subName is the full name of the subscription to pull messages from.
-// ctx is the context to use for acking messages and extending message deadlines.
-func newMessageIterator(ctx context.Context, s service, subName string, po *pullOptions) *messageIterator {
-	if !useStreamingPull {
-		return &messageIterator{
-			impl: newPollingMessageIterator(ctx, s, subName, po),
-		}
-	}
-	sp := s.newStreamingPuller(ctx, subName, int32(po.ackDeadline.Seconds()))
-	err := sp.open()
-	if grpc.Code(err) == codes.Unimplemented {
-		log.Println("pubsub: streaming pull unimplemented; falling back to legacy pull")
-		return &messageIterator{
-			impl: newPollingMessageIterator(ctx, s, subName, po),
-		}
-	}
-	// TODO(jba): handle other non-nil error?
-	log.Println("using streaming pull")
-	return &messageIterator{
-		impl: newStreamingMessageIterator(ctx, sp, po),
-	}
-}
-
-func newPollingMessageIterator(ctx context.Context, s service, subName string, po *pullOptions) *pollingMessageIterator {
-	// TODO: make kaTicker frequency more configurable.
-	// (ackDeadline - 5s) is a reasonable default for now, because the minimum ack period is 10s.  This gives us 5s grace.
-	keepAlivePeriod := po.ackDeadline - 5*time.Second
-	kaTicker := time.NewTicker(keepAlivePeriod) // Stopped in it.Stop
-
-	// TODO: make ackTicker more configurable.  Something less than
-	// kaTicker is a reasonable default (there's no point extending
-	// messages when they could be acked instead).
-	ackTicker := time.NewTicker(keepAlivePeriod / 2) // Stopped in it.Stop
-	ka := &keepAlive{
-		s:             s,
-		Ctx:           ctx,
-		Sub:           subName,
-		ExtensionTick: kaTicker.C,
-		Deadline:      po.ackDeadline,
-		MaxExtension:  po.maxExtension,
-	}
-
-	ack := &acker{
-		s:       s,
-		Ctx:     ctx,
-		Sub:     subName,
-		AckTick: ackTicker.C,
-		Notify:  ka.Remove,
-	}
-
-	nacker := bundler.NewBundler("", func(ackIDs interface{}) {
-		// NACK by setting the ack deadline to zero, to make the message
-		// immediately available for redelivery.
-		//
-		// If the RPC fails, nothing we can do about it. In the worst case, the
-		// deadline for these messages will expire and they will still get
-		// redelivered.
-		_ = s.modifyAckDeadline(ctx, subName, 0, ackIDs.([]string))
-	})
-	nacker.DelayThreshold = keepAlivePeriod / 10 // nack promptly
-	nacker.BundleCountThreshold = 10
-
-	pull := newPuller(s, subName, ctx, po.maxPrefetch, ka.Add, ka.Remove)
-
-	ka.Start()
-	ack.Start()
-	return &pollingMessageIterator{
-		kaTicker:  kaTicker,
-		ackTicker: ackTicker,
-		ka:        ka,
-		acker:     ack,
-		nacker:    nacker,
-		puller:    pull,
-		closed:    make(chan struct{}),
-	}
-}
-
-// Next returns the next Message to be processed.  The caller must call
-// Message.Done when finished with it.
-// Once Stop has been called, calls to Next will return iterator.Done.
-func (it *messageIterator) Next() (*Message, error) {
-	return it.impl.next()
-}
-
-func (it *pollingMessageIterator) next() (*Message, error) {
-	m, err := it.puller.Next()
-	if err == nil {
-		m.doneFunc = it.done
-		return m, nil
-	}
-
-	select {
-	// If Stop has been called, we return Done regardless the value of err.
-	case <-it.closed:
-		return nil, iterator.Done
-	default:
-		return nil, err
-	}
-}
-
-// Client code must call Stop on a messageIterator when finished with it.
-// Stop will block until Done has been called on all Messages that have been
-// returned by Next, or until the context with which the messageIterator was created
-// is cancelled or exceeds its deadline.
-// Stop need only be called once, but may be called multiple times from
-// multiple goroutines.
-func (it *messageIterator) Stop() {
-	it.impl.stop()
-}
-
-func (it *pollingMessageIterator) stop() {
-	it.mu.Lock()
-	defer it.mu.Unlock()
-
-	select {
-	case <-it.closed:
-		// Cleanup has already been performed.
-		return
-	default:
-	}
-
-	// We close this channel before calling it.puller.Stop to ensure that we
-	// reliably return iterator.Done from Next.
-	close(it.closed)
-
-	// Stop the puller. Once this completes, no more messages will be added
-	// to it.ka.
-	it.puller.Stop()
-
-	// Start acking messages as they arrive, ignoring ackTicker.  This will
-	// result in it.ka.Stop, below, returning as soon as possible.
-	it.acker.FastMode()
-
-	// This will block until
-	//   (a) it.ka.Ctx is done, or
-	//   (b) all messages have been removed from keepAlive.
-	// (b) will happen once all outstanding messages have been either ACKed or NACKed.
-	it.ka.Stop()
-
-	// There are no more live messages, so kill off the acker.
-	it.acker.Stop()
-	it.nacker.Flush()
-	it.kaTicker.Stop()
-	it.ackTicker.Stop()
-}
-
-func (it *pollingMessageIterator) done(ackID string, ack bool) {
-	if ack {
-		it.acker.Ack(ackID)
-		// There's no need to call it.ka.Remove here, as acker will
-		// call it via its Notify function.
-	} else {
-		it.ka.Remove(ackID)
-		_ = it.nacker.Add(ackID, len(ackID)) // ignore error; this is just an optimization
-	}
-}
-
-type streamingMessageIterator struct {
-	ctx        context.Context
-	po         *pullOptions
-	sp         *streamingPuller
-	kaTicker   *time.Ticker  // keep-alive (deadline extensions)
-	ackTicker  *time.Ticker  // message acks
-	nackTicker *time.Ticker  // message nacks (more frequent than acks)
-	failed     chan struct{} // closed on stream error
-	stopped    chan struct{} // closed when Stop is called
-	drained    chan struct{} // closed when stopped && no more pending messages
-	msgc       chan *Message
-	wg         sync.WaitGroup
-
-	mu                 sync.Mutex
-	keepAliveDeadlines map[string]time.Time
-	pendingReq         *pb.StreamingPullRequest
-	err                error // error from stream failure
-}
-
-func newStreamingMessageIterator(ctx context.Context, sp *streamingPuller, po *pullOptions) *streamingMessageIterator {
-	// TODO: make kaTicker frequency more configurable. (ackDeadline - 5s) is a
-	// reasonable default for now, because the minimum ack period is 10s. This
-	// gives us 5s grace.
-	keepAlivePeriod := po.ackDeadline - 5*time.Second
-	kaTicker := time.NewTicker(keepAlivePeriod)
-
-	// TODO: make ackTicker more configurable.  Something less than
-	// kaTicker is a reasonable default (there's no point extending
-	// messages when they could be acked instead).
-	ackTicker := time.NewTicker(keepAlivePeriod / 2)
-	nackTicker := time.NewTicker(keepAlivePeriod / 10)
-	it := &streamingMessageIterator{
-		ctx:        ctx,
-		sp:         sp,
-		po:         po,
-		kaTicker:   kaTicker,
-		ackTicker:  ackTicker,
-		nackTicker: nackTicker,
-		failed:     make(chan struct{}),
-		stopped:    make(chan struct{}),
-		drained:    make(chan struct{}),
-		// use maxPrefetch as the channel's buffer size.
-		msgc:               make(chan *Message, po.maxPrefetch),
-		keepAliveDeadlines: map[string]time.Time{},
-		pendingReq:         &pb.StreamingPullRequest{},
-	}
-	it.wg.Add(2)
-	go it.receiver()
-	go it.sender()
-	return it
-}
-
-func (it *streamingMessageIterator) next() (*Message, error) {
-	// If ctx has been cancelled or the iterator is done, return straight
-	// away (even if there are buffered messages available).
-	select {
-	case <-it.ctx.Done():
-		return nil, it.ctx.Err()
-
-	case <-it.failed:
-		break
-
-	case <-it.stopped:
-		break
-
-	default:
-		// Wait for a message, but also for one of the above conditions.
-		select {
-		case msg := <-it.msgc:
-			// Since active select cases are chosen at random, this can return
-			// nil (from the channel close) even if it.failed or it.stopped is
-			// closed.
-			if msg == nil {
-				break
-			}
-			msg.doneFunc = it.done
-			return msg, nil
-
-		case <-it.ctx.Done():
-			return nil, it.ctx.Err()
-
-		case <-it.failed:
-			break
-
-		case <-it.stopped:
-			break
-		}
-	}
-	// Here if the iterator is done.
-	it.mu.Lock()
-	defer it.mu.Unlock()
-	return nil, it.err
-}
-
-func (it *streamingMessageIterator) stop() {
-	it.mu.Lock()
-	select {
-	case <-it.stopped:
-		it.mu.Unlock()
-		it.wg.Wait()
-		return
-	default:
-		close(it.stopped)
-	}
-	if it.err == nil {
-		it.err = iterator.Done
-	}
-	// Before reading from the channel, see if we're already drained.
-	it.checkDrained()
-	it.mu.Unlock()
-	// Nack all the pending messages.
-	// Grab the lock separately for each message to allow the receiver
-	// and sender goroutines to make progress.
-	// Why this will eventually terminate:
-	// - If the receiver is not blocked on a stream Recv, then
-	//   it will write all the messages it has received to the channel,
-	//   then exit, closing the channel.
-	// - If the receiver is blocked, then this loop will eventually
-	//   nack all the messages in the channel. Once done is called
-	//   on the remaining messages, the iterator will be marked as drained,
-	//   which will trigger the sender to terminate. When it does, it
-	//   performs a CloseSend on the stream, which will result in the blocked
-	//   stream Recv returning.
-	for m := range it.msgc {
-		it.mu.Lock()
-		delete(it.keepAliveDeadlines, m.ackID)
-		it.addDeadlineMod(m.ackID, 0)
-		it.checkDrained()
-		it.mu.Unlock()
-	}
-	it.wg.Wait()
-}
-
-// checkDrained closes the drained channel if the iterator has been stopped and all
-// pending messages have either been n/acked or expired.
-//
-// Called with the lock held.
-func (it *streamingMessageIterator) checkDrained() {
-	select {
-	case <-it.drained:
-		return
-	default:
-	}
-	select {
-	case <-it.stopped:
-		if len(it.keepAliveDeadlines) == 0 {
-			close(it.drained)
-		}
-	default:
-	}
-}
-
-// Called when a message is acked/nacked.
-func (it *streamingMessageIterator) done(ackID string, ack bool) {
-	it.mu.Lock()
-	defer it.mu.Unlock()
-	delete(it.keepAliveDeadlines, ackID)
-	if ack {
-		it.pendingReq.AckIds = append(it.pendingReq.AckIds, ackID)
-	} else {
-		it.addDeadlineMod(ackID, 0) // Nack indicated by modifying the deadline to zero.
-	}
-	it.checkDrained()
-}
-
-// addDeadlineMod adds the ack ID to the pending request with the given deadline.
-//
-// Called with the lock held.
-func (it *streamingMessageIterator) addDeadlineMod(ackID string, deadlineSecs int32) {
-	pr := it.pendingReq
-	pr.ModifyDeadlineAckIds = append(pr.ModifyDeadlineAckIds, ackID)
-	pr.ModifyDeadlineSeconds = append(pr.ModifyDeadlineSeconds, deadlineSecs)
-}
-
-// fail is called when a stream method returns a permanent error.
-func (it *streamingMessageIterator) fail(err error) {
-	it.mu.Lock()
-	if it.err == nil {
-		it.err = err
-		close(it.failed)
-	}
-	it.mu.Unlock()
-}
-
-// receiver runs in a goroutine and handles all receives from the stream.
-func (it *streamingMessageIterator) receiver() {
-	defer it.wg.Done()
-	defer close(it.msgc)
-	for {
-		// Stop retrieving messages if the context is done, the stream
-		// failed, or the iterator's Stop method was called.
-		select {
-		case <-it.ctx.Done():
-			return
-		case <-it.failed:
-			return
-		case <-it.stopped:
-			return
-		default:
-		}
-		// Receive messages from stream. This may block indefinitely.
-		msgs, err := it.sp.fetchMessages()
-
-		// The streamingPuller handles retries, so any error here
-		// is fatal to the iterator.
-		if err != nil {
-			it.fail(err)
-			return
-		}
-		// We received some messages. Remember them so we can
-		// keep them alive.
-		deadline := time.Now().Add(it.po.maxExtension)
-		it.mu.Lock()
-		for _, m := range msgs {
-			it.keepAliveDeadlines[m.ackID] = deadline
-		}
-		it.mu.Unlock()
-		// Deliver the messages to the channel.
-		for _, m := range msgs {
-			select {
-			case <-it.ctx.Done():
-				return
-			case <-it.failed:
-				return
-				// Don't return if stopped. We want to send the remaining
-				// messages on the channel, where they will be nacked.
-			case it.msgc <- m:
-			}
-		}
-	}
-}
-
-// sender runs in a goroutine and handles all sends to the stream.
-func (it *streamingMessageIterator) sender() {
-	defer it.wg.Done()
-	defer it.kaTicker.Stop()
-	defer it.ackTicker.Stop()
-	defer it.nackTicker.Stop()
-	defer it.sp.closeSend()
-
-	done := false
-	for !done {
-		send := false
-		select {
-		case <-it.ctx.Done():
-			// Context canceled or timed out: stop immediately, without
-			// another RPC.
-			return
-
-		case <-it.failed:
-			// Stream failed: nothing to do, so stop immediately.
-			return
-
-		case <-it.drained:
-			// All outstanding messages have been marked done:
-			// nothing left to do except send the final request.
-			it.mu.Lock()
-			send = (len(it.pendingReq.AckIds) > 0 || len(it.pendingReq.ModifyDeadlineAckIds) > 0)
-			done = true
-
-		case <-it.kaTicker.C:
-			it.mu.Lock()
-			send = it.handleKeepAlives()
-
-		case <-it.nackTicker.C:
-			it.mu.Lock()
-			send = (len(it.pendingReq.ModifyDeadlineAckIds) > 0)
-
-		case <-it.ackTicker.C:
-			it.mu.Lock()
-			send = (len(it.pendingReq.AckIds) > 0)
-
-		}
-		// Lock is held here.
-		if send {
-			req := it.pendingReq
-			it.pendingReq = &pb.StreamingPullRequest{}
-			it.mu.Unlock()
-			err := it.sp.send(req)
-			if err != nil {
-				// The streamingPuller handles retries, so any error here
-				// is fatal to the iterator.
-				it.fail(err)
-				return
-			}
-		} else {
-			it.mu.Unlock()
-		}
-	}
-}
-
-// handleKeepAlives modifies the pending request to include deadline extensions
-// for live messages. It also purges expired messages. It reports whether
-// there were any live messages.
-//
-// Called with the lock held.
-func (it *streamingMessageIterator) handleKeepAlives() bool {
-	live, expired := getKeepAliveAckIDs(it.keepAliveDeadlines)
-	for _, e := range expired {
-		delete(it.keepAliveDeadlines, e)
-	}
-	dl := trunc32(int64(it.po.ackDeadline.Seconds()))
-	for _, m := range live {
-		it.addDeadlineMod(m, dl)
-	}
-	it.checkDrained()
-	return len(live) > 0
-}