1 files changed, 0 insertions, 400 deletions
diff --git a/vendor/golang.org/x/time/rate/rate.go b/vendor/golang.org/x/time/rate/rate.go
deleted file mode 100644
index 563f70429..000000000
--- a/vendor/golang.org/x/time/rate/rate.go
+++ /dev/null
@@ -1,400 +0,0 @@
-// 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.
-
-// Package rate provides a rate limiter.
-package rate
-
-import (
-	"context"
-	"fmt"
-	"math"
-	"sync"
-	"time"
-)
-
-// Limit defines the maximum frequency of some events.
-// Limit is represented as number of events per second.
-// A zero Limit allows no events.
-type Limit float64
-
-// Inf is the infinite rate limit; it allows all events (even if burst is zero).
-const Inf = Limit(math.MaxFloat64)
-
-// Every converts a minimum time interval between events to a Limit.
-func Every(interval time.Duration) Limit {
-	if interval <= 0 {
-		return Inf
-	}
-	return 1 / Limit(interval.Seconds())
-}
-
-// A Limiter controls how frequently events are allowed to happen.
-// It implements a "token bucket" of size b, initially full and refilled
-// at rate r tokens per second.
-// Informally, in any large enough time interval, the Limiter limits the
-// rate to r tokens per second, with a maximum burst size of b events.
-// As a special case, if r == Inf (the infinite rate), b is ignored.
-// See https://en.wikipedia.org/wiki/Token_bucket for more about token buckets.
-//
-// The zero value is a valid Limiter, but it will reject all events.
-// Use NewLimiter to create non-zero Limiters.
-//
-// Limiter has three main methods, Allow, Reserve, and Wait.
-// Most callers should use Wait.
-//
-// Each of the three methods consumes a single token.
-// They differ in their behavior when no token is available.
-// If no token is available, Allow returns false.
-// If no token is available, Reserve returns a reservation for a future token
-// and the amount of time the caller must wait before using it.
-// If no token is available, Wait blocks until one can be obtained
-// or its associated context.Context is canceled.
-//
-// The methods AllowN, ReserveN, and WaitN consume n tokens.
-type Limiter struct {
-	limit Limit
-	burst int
-
-	mu     sync.Mutex
-	tokens float64
-	// last is the last time the limiter's tokens field was updated
-	last time.Time
-	// lastEvent is the latest time of a rate-limited event (past or future)
-	lastEvent time.Time
-}
-
-// Limit returns the maximum overall event rate.
-func (lim *Limiter) Limit() Limit {
-	lim.mu.Lock()
-	defer lim.mu.Unlock()
-	return lim.limit
-}
-
-// Burst returns the maximum burst size. Burst is the maximum number of tokens
-// that can be consumed in a single call to Allow, Reserve, or Wait, so higher
-// Burst values allow more events to happen at once.
-// A zero Burst allows no events, unless limit == Inf.
-func (lim *Limiter) Burst() int {
-	return lim.burst
-}
-
-// NewLimiter returns a new Limiter that allows events up to rate r and permits
-// bursts of at most b tokens.
-func NewLimiter(r Limit, b int) *Limiter {
-	return &Limiter{
-		limit: r,
-		burst: b,
-	}
-}
-
-// Allow is shorthand for AllowN(time.Now(), 1).
-func (lim *Limiter) Allow() bool {
-	return lim.AllowN(time.Now(), 1)
-}
-
-// AllowN reports whether n events may happen at time now.
-// Use this method if you intend to drop / skip events that exceed the rate limit.
-// Otherwise use Reserve or Wait.
-func (lim *Limiter) AllowN(now time.Time, n int) bool {
-	return lim.reserveN(now, n, 0).ok
-}
-
-// A Reservation holds information about events that are permitted by a Limiter to happen after a delay.
-// A Reservation may be canceled, which may enable the Limiter to permit additional events.
-type Reservation struct {
-	ok        bool
-	lim       *Limiter
-	tokens    int
-	timeToAct time.Time
-	// This is the Limit at reservation time, it can change later.
-	limit Limit
-}
-
-// OK returns whether the limiter can provide the requested number of tokens
-// within the maximum wait time.  If OK is false, Delay returns InfDuration, and
-// Cancel does nothing.
-func (r *Reservation) OK() bool {
-	return r.ok
-}
-
-// Delay is shorthand for DelayFrom(time.Now()).
-func (r *Reservation) Delay() time.Duration {
-	return r.DelayFrom(time.Now())
-}
-
-// InfDuration is the duration returned by Delay when a Reservation is not OK.
-const InfDuration = time.Duration(1<<63 - 1)
-
-// DelayFrom returns the duration for which the reservation holder must wait
-// before taking the reserved action.  Zero duration means act immediately.
-// InfDuration means the limiter cannot grant the tokens requested in this
-// Reservation within the maximum wait time.
-func (r *Reservation) DelayFrom(now time.Time) time.Duration {
-	if !r.ok {
-		return InfDuration
-	}
-	delay := r.timeToAct.Sub(now)
-	if delay < 0 {
-		return 0
-	}
-	return delay
-}
-
-// Cancel is shorthand for CancelAt(time.Now()).
-func (r *Reservation) Cancel() {
-	r.CancelAt(time.Now())
-	return
-}
-
-// CancelAt indicates that the reservation holder will not perform the reserved action
-// and reverses the effects of this Reservation on the rate limit as much as possible,
-// considering that other reservations may have already been made.
-func (r *Reservation) CancelAt(now time.Time) {
-	if !r.ok {
-		return
-	}
-
-	r.lim.mu.Lock()
-	defer r.lim.mu.Unlock()
-
-	if r.lim.limit == Inf || r.tokens == 0 || r.timeToAct.Before(now) {
-		return
-	}
-
-	// calculate tokens to restore
-	// The duration between lim.lastEvent and r.timeToAct tells us how many tokens were reserved
-	// after r was obtained. These tokens should not be restored.
-	restoreTokens := float64(r.tokens) - r.limit.tokensFromDuration(r.lim.lastEvent.Sub(r.timeToAct))
-	if restoreTokens <= 0 {
-		return
-	}
-	// advance time to now
-	now, _, tokens := r.lim.advance(now)
-	// calculate new number of tokens
-	tokens += restoreTokens
-	if burst := float64(r.lim.burst); tokens > burst {
-		tokens = burst
-	}
-	// update state
-	r.lim.last = now
-	r.lim.tokens = tokens
-	if r.timeToAct == r.lim.lastEvent {
-		prevEvent := r.timeToAct.Add(r.limit.durationFromTokens(float64(-r.tokens)))
-		if !prevEvent.Before(now) {
-			r.lim.lastEvent = prevEvent
-		}
-	}
-
-	return
-}
-
-// Reserve is shorthand for ReserveN(time.Now(), 1).
-func (lim *Limiter) Reserve() *Reservation {
-	return lim.ReserveN(time.Now(), 1)
-}
-
-// ReserveN returns a Reservation that indicates how long the caller must wait before n events happen.
-// The Limiter takes this Reservation into account when allowing future events.
-// ReserveN returns false if n exceeds the Limiter's burst size.
-// Usage example:
-//   r := lim.ReserveN(time.Now(), 1)
-//   if !r.OK() {
-//     // Not allowed to act! Did you remember to set lim.burst to be > 0 ?
-//     return
-//   }
-//   time.Sleep(r.Delay())
-//   Act()
-// Use this method if you wish to wait and slow down in accordance with the rate limit without dropping events.
-// If you need to respect a deadline or cancel the delay, use Wait instead.
-// To drop or skip events exceeding rate limit, use Allow instead.
-func (lim *Limiter) ReserveN(now time.Time, n int) *Reservation {
-	r := lim.reserveN(now, n, InfDuration)
-	return &r
-}
-
-// Wait is shorthand for WaitN(ctx, 1).
-func (lim *Limiter) Wait(ctx context.Context) (err error) {
-	return lim.WaitN(ctx, 1)
-}
-
-// WaitN blocks until lim permits n events to happen.
-// It returns an error if n exceeds the Limiter's burst size, the Context is
-// canceled, or the expected wait time exceeds the Context's Deadline.
-// The burst limit is ignored if the rate limit is Inf.
-func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) {
-	lim.mu.Lock()
-	burst := lim.burst
-	limit := lim.limit
-	lim.mu.Unlock()
-
-	if n > burst && limit != Inf {
-		return fmt.Errorf("rate: Wait(n=%d) exceeds limiter's burst %d", n, lim.burst)
-	}
-	// Check if ctx is already cancelled
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
-	}
-	// Determine wait limit
-	now := time.Now()
-	waitLimit := InfDuration
-	if deadline, ok := ctx.Deadline(); ok {
-		waitLimit = deadline.Sub(now)
-	}
-	// Reserve
-	r := lim.reserveN(now, n, waitLimit)
-	if !r.ok {
-		return fmt.Errorf("rate: Wait(n=%d) would exceed context deadline", n)
-	}
-	// Wait if necessary
-	delay := r.DelayFrom(now)
-	if delay == 0 {
-		return nil
-	}
-	t := time.NewTimer(delay)
-	defer t.Stop()
-	select {
-	case <-t.C:
-		// We can proceed.
-		return nil
-	case <-ctx.Done():
-		// Context was canceled before we could proceed.  Cancel the
-		// reservation, which may permit other events to proceed sooner.
-		r.Cancel()
-		return ctx.Err()
-	}
-}
-
-// SetLimit is shorthand for SetLimitAt(time.Now(), newLimit).
-func (lim *Limiter) SetLimit(newLimit Limit) {
-	lim.SetLimitAt(time.Now(), newLimit)
-}
-
-// SetLimitAt sets a new Limit for the limiter. The new Limit, and Burst, may be violated
-// or underutilized by those which reserved (using Reserve or Wait) but did not yet act
-// before SetLimitAt was called.
-func (lim *Limiter) SetLimitAt(now time.Time, newLimit Limit) {
-	lim.mu.Lock()
-	defer lim.mu.Unlock()
-
-	now, _, tokens := lim.advance(now)
-
-	lim.last = now
-	lim.tokens = tokens
-	lim.limit = newLimit
-}
-
-// SetBurst is shorthand for SetBurstAt(time.Now(), newBurst).
-func (lim *Limiter) SetBurst(newBurst int) {
-	lim.SetBurstAt(time.Now(), newBurst)
-}
-
-// SetBurstAt sets a new burst size for the limiter.
-func (lim *Limiter) SetBurstAt(now time.Time, newBurst int) {
-	lim.mu.Lock()
-	defer lim.mu.Unlock()
-
-	now, _, tokens := lim.advance(now)
-
-	lim.last = now
-	lim.tokens = tokens
-	lim.burst = newBurst
-}
-
-// reserveN is a helper method for AllowN, ReserveN, and WaitN.
-// maxFutureReserve specifies the maximum reservation wait duration allowed.
-// reserveN returns Reservation, not *Reservation, to avoid allocation in AllowN and WaitN.
-func (lim *Limiter) reserveN(now time.Time, n int, maxFutureReserve time.Duration) Reservation {
-	lim.mu.Lock()
-
-	if lim.limit == Inf {
-		lim.mu.Unlock()
-		return Reservation{
-			ok:        true,
-			lim:       lim,
-			tokens:    n,
-			timeToAct: now,
-		}
-	}
-
-	now, last, tokens := lim.advance(now)
-
-	// Calculate the remaining number of tokens resulting from the request.
-	tokens -= float64(n)
-
-	// Calculate the wait duration
-	var waitDuration time.Duration
-	if tokens < 0 {
-		waitDuration = lim.limit.durationFromTokens(-tokens)
-	}
-
-	// Decide result
-	ok := n <= lim.burst && waitDuration <= maxFutureReserve
-
-	// Prepare reservation
-	r := Reservation{
-		ok:    ok,
-		lim:   lim,
-		limit: lim.limit,
-	}
-	if ok {
-		r.tokens = n
-		r.timeToAct = now.Add(waitDuration)
-	}
-
-	// Update state
-	if ok {
-		lim.last = now
-		lim.tokens = tokens
-		lim.lastEvent = r.timeToAct
-	} else {
-		lim.last = last
-	}
-
-	lim.mu.Unlock()
-	return r
-}
-
-// advance calculates and returns an updated state for lim resulting from the passage of time.
-// lim is not changed.
-func (lim *Limiter) advance(now time.Time) (newNow time.Time, newLast time.Time, newTokens float64) {
-	last := lim.last
-	if now.Before(last) {
-		last = now
-	}
-
-	// Avoid making delta overflow below when last is very old.
-	maxElapsed := lim.limit.durationFromTokens(float64(lim.burst) - lim.tokens)
-	elapsed := now.Sub(last)
-	if elapsed > maxElapsed {
-		elapsed = maxElapsed
-	}
-
-	// Calculate the new number of tokens, due to time that passed.
-	delta := lim.limit.tokensFromDuration(elapsed)
-	tokens := lim.tokens + delta
-	if burst := float64(lim.burst); tokens > burst {
-		tokens = burst
-	}
-
-	return now, last, tokens
-}
-
-// durationFromTokens is a unit conversion function from the number of tokens to the duration
-// of time it takes to accumulate them at a rate of limit tokens per second.
-func (limit Limit) durationFromTokens(tokens float64) time.Duration {
-	seconds := tokens / float64(limit)
-	return time.Nanosecond * time.Duration(1e9*seconds)
-}
-
-// tokensFromDuration is a unit conversion function from a time duration to the number of tokens
-// which could be accumulated during that duration at a rate of limit tokens per second.
-func (limit Limit) tokensFromDuration(d time.Duration) float64 {
-	// Split the integer and fractional parts ourself to minimize rounding errors.
-	// See golang.org/issues/34861.
-	sec := float64(d/time.Second) * float64(limit)
-	nsec := float64(d%time.Second) * float64(limit)
-	return sec + nsec/1e9
-}