Move deps from _workspace/ to vendor/

godep restore
pushd $GOPATH/src/github.com/appc/spec
git co master
popd
go get go4.org/errorutil
rm -rf Godeps
godep save ./...
git add vendor
git add -f $(git ls-files --other vendor/)
git co -- Godeps/LICENSES Godeps/.license_file_state Godeps/OWNERS

vendor/github.com/google/cadvisor/container/common/fsHandler.go

@@ -0,0 +1,134 @@
+// 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.
+
+// Handler for Docker containers.
+package common
+
+import (
+	"sync"
+	"time"
+
+	"github.com/google/cadvisor/fs"
+
+	"github.com/golang/glog"
+)
+
+type FsHandler interface {
+	Start()
+	Usage() (baseUsageBytes uint64, totalUsageBytes uint64)
+	Stop()
+}
+
+type realFsHandler struct {
+	sync.RWMutex
+	lastUpdate     time.Time
+	usageBytes     uint64
+	baseUsageBytes uint64
+	period         time.Duration
+	minPeriod      time.Duration
+	rootfs         string
+	extraDir       string
+	fsInfo         fs.FsInfo
+	// Tells the container to stop.
+	stopChan chan struct{}
+}
+
+const (
+	longDu             = time.Second
+	duTimeout          = time.Minute
+	maxDuBackoffFactor = 20
+)
+
+var _ FsHandler = &realFsHandler{}
+
+func NewFsHandler(period time.Duration, rootfs, extraDir string, fsInfo fs.FsInfo) FsHandler {
+	return &realFsHandler{
+		lastUpdate:     time.Time{},
+		usageBytes:     0,
+		baseUsageBytes: 0,
+		period:         period,
+		minPeriod:      period,
+		rootfs:         rootfs,
+		extraDir:       extraDir,
+		fsInfo:         fsInfo,
+		stopChan:       make(chan struct{}, 1),
+	}
+}
+
+func (fh *realFsHandler) update() error {
+	var (
+		baseUsage, extraDirUsage uint64
+		err                      error
+	)
+	// TODO(vishh): Add support for external mounts.
+	if fh.rootfs != "" {
+		baseUsage, err = fh.fsInfo.GetDirUsage(fh.rootfs, duTimeout)
+		if err != nil {
+			return err
+		}
+	}
+
+	if fh.extraDir != "" {
+		extraDirUsage, err = fh.fsInfo.GetDirUsage(fh.extraDir, duTimeout)
+		if err != nil {
+			return err
+		}
+	}
+
+	fh.Lock()
+	defer fh.Unlock()
+	fh.lastUpdate = time.Now()
+	fh.usageBytes = baseUsage + extraDirUsage
+	fh.baseUsageBytes = baseUsage
+	return nil
+}
+
+func (fh *realFsHandler) trackUsage() {
+	fh.update()
+	for {
+		select {
+		case <-fh.stopChan:
+			return
+		case <-time.After(fh.period):
+			start := time.Now()
+			if err := fh.update(); err != nil {
+				glog.Errorf("failed to collect filesystem stats - %v", err)
+				fh.period = fh.period * 2
+				if fh.period > maxDuBackoffFactor*fh.minPeriod {
+					fh.period = maxDuBackoffFactor * fh.minPeriod
+				}
+			} else {
+				fh.period = fh.minPeriod
+			}
+			duration := time.Since(start)
+			if duration > longDu {
+				glog.V(2).Infof("`du` on following dirs took %v: %v", duration, []string{fh.rootfs, fh.extraDir})
+			}
+		}
+	}
+}
+
+func (fh *realFsHandler) Start() {
+	go fh.trackUsage()
+}
+
+func (fh *realFsHandler) Stop() {
+	close(fh.stopChan)
+}
+
+func (fh *realFsHandler) Usage() (baseUsageBytes, totalUsageBytes uint64) {
+	fh.RLock()
+	defer fh.RUnlock()
+	return fh.baseUsageBytes, fh.usageBytes
+}