From b41e96b421acda1761e9ba2ee17da16efad436cd Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Tue, 13 Jun 2017 20:23:21 +0200
Subject: 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.
---
 vendor/cloud.google.com/go/trace/sampling.go | 117 ---------------------------
 1 file changed, 117 deletions(-)
 delete mode 100644 vendor/cloud.google.com/go/trace/sampling.go

(limited to 'vendor/cloud.google.com/go/trace/sampling.go')

diff --git a/vendor/cloud.google.com/go/trace/sampling.go b/vendor/cloud.google.com/go/trace/sampling.go
deleted file mode 100644
index d609290b9..000000000
--- a/vendor/cloud.google.com/go/trace/sampling.go
+++ /dev/null
@@ -1,117 +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 trace
-
-import (
-	crand "crypto/rand"
-	"encoding/binary"
-	"fmt"
-	"math/rand"
-	"sync"
-	"time"
-
-	"golang.org/x/time/rate"
-)
-
-type SamplingPolicy interface {
-	// Sample returns a Decision.
-	// If Trace is false in the returned Decision, then the Decision should be
-	// the zero value.
-	Sample(p Parameters) Decision
-}
-
-// Parameters contains the values passed to a SamplingPolicy's Sample method.
-type Parameters struct {
-	HasTraceHeader bool // whether the incoming request has a valid X-Cloud-Trace-Context header.
-}
-
-// Decision is the value returned by a call to a SamplingPolicy's Sample method.
-type Decision struct {
-	Trace  bool    // Whether to trace the request.
-	Sample bool    // Whether the trace is included in the random sample.
-	Policy string  // Name of the sampling policy.
-	Weight float64 // Sample weight to be used in statistical calculations.
-}
-
-type sampler struct {
-	fraction float64
-	skipped  float64
-	*rate.Limiter
-	*rand.Rand
-	sync.Mutex
-}
-
-func (s *sampler) Sample(p Parameters) Decision {
-	s.Lock()
-	x := s.Float64()
-	d := s.sample(p, time.Now(), x)
-	s.Unlock()
-	return d
-}
-
-// sample contains the a deterministic, time-independent logic of Sample.
-func (s *sampler) sample(p Parameters, now time.Time, x float64) (d Decision) {
-	d.Sample = x < s.fraction
-	d.Trace = p.HasTraceHeader || d.Sample
-	if !d.Trace {
-		// We have no reason to trace this request.
-		return Decision{}
-	}
-	// We test separately that the rate limit is not tiny before calling AllowN,
-	// because of overflow problems in x/time/rate.
-	if s.Limit() < 1e-9 || !s.AllowN(now, 1) {
-		// Rejected by the rate limit.
-		if d.Sample {
-			s.skipped++
-		}
-		return Decision{}
-	}
-	if d.Sample {
-		d.Policy, d.Weight = "default", (1.0+s.skipped)/s.fraction
-		s.skipped = 0.0
-	}
-	return
-}
-
-// NewLimitedSampler returns a sampling policy that randomly samples a given
-// fraction of requests.  It also enforces a limit on the number of traces per
-// second.  It tries to trace every request with a trace header, but will not
-// exceed the qps limit to do it.
-func NewLimitedSampler(fraction, maxqps float64) (SamplingPolicy, error) {
-	if !(fraction >= 0) {
-		return nil, fmt.Errorf("invalid fraction %f", fraction)
-	}
-	if !(maxqps >= 0) {
-		return nil, fmt.Errorf("invalid maxqps %f", maxqps)
-	}
-	// Set a limit on the number of accumulated "tokens", to limit bursts of
-	// traced requests.  Use one more than a second's worth of tokens, or 100,
-	// whichever is smaller.
-	// See https://godoc.org/golang.org/x/time/rate#NewLimiter.
-	maxTokens := 100
-	if maxqps < 99.0 {
-		maxTokens = 1 + int(maxqps)
-	}
-	var seed int64
-	if err := binary.Read(crand.Reader, binary.LittleEndian, &seed); err != nil {
-		seed = time.Now().UnixNano()
-	}
-	s := sampler{
-		fraction: fraction,
-		Limiter:  rate.NewLimiter(rate.Limit(maxqps), maxTokens),
-		Rand:     rand.New(rand.NewSource(seed)),
-	}
-	return &s, nil
-}
-- 
cgit mrf-deployment