Merge pull request #83435 from liggitt/automated-cherry-pick-of-#83261-upstream-release-1.14

[1.14] Automated cherry pick of #83261: bump gopkg.in/yaml.v2 v2.2.4

Kubernetes-commit: bdc7ad2ca2d8f54b59ca076981535b769627834d

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,2 +1,2 @@
-Sorry, we do not accept changes directly against this repository. Please see 
+Sorry, we do not accept changes directly against this repository. Please see
 CONTRIBUTING.md for information on where and how to contribute instead.

CONTRIBUTING.md

@@ -2,6 +2,6 @@
 
 Do not open pull requests directly against this repository, they will be ignored. Instead, please open pull requests against [kubernetes/kubernetes](https://git.k8s.io/kubernetes/).  Please follow the same [contributing guide](https://git.k8s.io/kubernetes/CONTRIBUTING.md) you would follow for any other pull request made to kubernetes/kubernetes.
 
-This repository is published from [kubernetes/kubernetes/staging/src/k8s.io/sample-controller](https://git.k8s.io/kubernetes/staging/src/k8s.io/sample-controller) by the [kubernetes publishing-bot](https://git.k8s.io/publishing-bot). 
+This repository is published from [kubernetes/kubernetes/staging/src/k8s.io/sample-controller](https://git.k8s.io/kubernetes/staging/src/k8s.io/sample-controller) by the [kubernetes publishing-bot](https://git.k8s.io/publishing-bot).
 
-Please see [Staging Directory and Publishing](https://git.k8s.io/community/contributors/devel/staging.md) for more information
+Please see [Staging Directory and Publishing](https://git.k8s.io/community/contributors/devel/sig-architecture/staging.md) for more information

Godeps/OWNERS

@@ -1,2 +1,4 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
 approvers:
 - dep-approvers

OWNERS

@@ -1,9 +1,12 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
 approvers:
 - sttts
 - munnerz
 reviewers:
 - gregory-m
-- kargakis
 - sttts
 - munnerz
 - nikhita
+labels:
+- sig/api-machinery

README.md

@@ -42,6 +42,8 @@ This is an example of how to build a kube-like controller with a single type.
 
 ```sh
 # assumes you have a working kubeconfig, not required if operating in-cluster
+$ go get k8s.io/sample-controller
+$ cd $GOPATH/src/k8s.io/sample-controller
 $ go build -o sample-controller .
 $ ./sample-controller -kubeconfig=$HOME/.kube/config
 
@@ -105,9 +107,8 @@ $ kubectl create -f artifacts/examples/crd-validation.yaml
 
 ## Subresources
 
-Custom Resources support `/status` and `/scale` subresources as an
-[alpha feature](https://kubernetes.io/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#subresources) in v1.10.
-Enable this feature using the `CustomResourceSubresources` feature gate on the [kube-apiserver](https://kubernetes.io/docs/admin/kube-apiserver):
+Custom Resources support `/status` and `/scale` subresources as a [beta feature](https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/#subresources) in v1.11 and is enabled by default.
+This feature is [alpha](https://v1-10.docs.kubernetes.io/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#subresources) in v1.10 and to enable it you need to set the `CustomResourceSubresources` feature gate on the [kube-apiserver](https://kubernetes.io/docs/admin/kube-apiserver):
 
 ```sh
 --feature-gates=CustomResourceSubresources=true

SECURITY_CONTACTS

@@ -1,10 +1,10 @@
 # Defined below are the security contacts for this repo.
 #
-# They are the contact point for the Product Security Team to reach out
+# They are the contact point for the Product Security Committee to reach out
 # to for triaging and handling of incoming issues.
 #
 # The below names agree to abide by the
-# [Embargo Policy](https://github.com/kubernetes/sig-release/blob/master/security-release-process-documentation/security-release-process.md#embargo-policy)
+# [Embargo Policy](https://git.k8s.io/security/private-distributors-list.md#embargo-policy)
 # and will be removed and replaced if they violate that agreement.
 #
 # DO NOT REPORT SECURITY VULNERABILITIES DIRECTLY TO THESE NAMES, FOLLOW THE

controller.go

@@ -20,13 +20,11 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/golang/glog"
 	appsv1 "k8s.io/api/apps/v1"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime/schema"
-	"k8s.io/apimachinery/pkg/util/runtime"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
 	appsinformers "k8s.io/client-go/informers/apps/v1"
@@ -37,12 +35,13 @@ import (
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/record"
 	"k8s.io/client-go/util/workqueue"
+	"k8s.io/klog"
 
 	samplev1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
-	clientset "k8s.io/sample-controller/pkg/client/clientset/versioned"
-	samplescheme "k8s.io/sample-controller/pkg/client/clientset/versioned/scheme"
-	informers "k8s.io/sample-controller/pkg/client/informers/externalversions/samplecontroller/v1alpha1"
-	listers "k8s.io/sample-controller/pkg/client/listers/samplecontroller/v1alpha1"
+	clientset "k8s.io/sample-controller/pkg/generated/clientset/versioned"
+	samplescheme "k8s.io/sample-controller/pkg/generated/clientset/versioned/scheme"
+	informers "k8s.io/sample-controller/pkg/generated/informers/externalversions/samplecontroller/v1alpha1"
+	listers "k8s.io/sample-controller/pkg/generated/listers/samplecontroller/v1alpha1"
 )
 
 const controllerAgentName = "sample-controller"
@@ -96,9 +95,9 @@ func NewController(
 	// Add sample-controller types to the default Kubernetes Scheme so Events can be
 	// logged for sample-controller types.
 	utilruntime.Must(samplescheme.AddToScheme(scheme.Scheme))
-	glog.V(4).Info("Creating event broadcaster")
+	klog.V(4).Info("Creating event broadcaster")
 	eventBroadcaster := record.NewBroadcaster()
-	eventBroadcaster.StartLogging(glog.Infof)
+	eventBroadcaster.StartLogging(klog.Infof)
 	eventBroadcaster.StartRecordingToSink(&typedcorev1.EventSinkImpl{Interface: kubeclientset.CoreV1().Events("")})
 	recorder := eventBroadcaster.NewRecorder(scheme.Scheme, corev1.EventSource{Component: controllerAgentName})
 
@@ -113,7 +112,7 @@ func NewController(
 		recorder:          recorder,
 	}
 
-	glog.Info("Setting up event handlers")
+	klog.Info("Setting up event handlers")
 	// Set up an event handler for when Foo resources change
 	fooInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
 		AddFunc: controller.enqueueFoo,
@@ -150,27 +149,27 @@ func NewController(
 // is closed, at which point it will shutdown the workqueue and wait for
 // workers to finish processing their current work items.
 func (c *Controller) Run(threadiness int, stopCh <-chan struct{}) error {
-	defer runtime.HandleCrash()
+	defer utilruntime.HandleCrash()
 	defer c.workqueue.ShutDown()
 
 	// Start the informer factories to begin populating the informer caches
-	glog.Info("Starting Foo controller")
+	klog.Info("Starting Foo controller")
 
 	// Wait for the caches to be synced before starting workers
-	glog.Info("Waiting for informer caches to sync")
+	klog.Info("Waiting for informer caches to sync")
 	if ok := cache.WaitForCacheSync(stopCh, c.deploymentsSynced, c.foosSynced); !ok {
 		return fmt.Errorf("failed to wait for caches to sync")
 	}
 
-	glog.Info("Starting workers")
+	klog.Info("Starting workers")
 	// Launch two workers to process Foo resources
 	for i := 0; i < threadiness; i++ {
 		go wait.Until(c.runWorker, time.Second, stopCh)
 	}
 
-	glog.Info("Started workers")
+	klog.Info("Started workers")
 	<-stopCh
-	glog.Info("Shutting down workers")
+	klog.Info("Shutting down workers")
 
 	return nil
 }
@@ -213,23 +212,25 @@ func (c *Controller) processNextWorkItem() bool {
 			// Forget here else we'd go into a loop of attempting to
 			// process a work item that is invalid.
 			c.workqueue.Forget(obj)
-			runtime.HandleError(fmt.Errorf("expected string in workqueue but got %#v", obj))
+			utilruntime.HandleError(fmt.Errorf("expected string in workqueue but got %#v", obj))
 			return nil
 		}
 		// Run the syncHandler, passing it the namespace/name string of the
 		// Foo resource to be synced.
 		if err := c.syncHandler(key); err != nil {
-			return fmt.Errorf("error syncing '%s': %s", key, err.Error())
+			// Put the item back on the workqueue to handle any transient errors.
+			c.workqueue.AddRateLimited(key)
+			return fmt.Errorf("error syncing '%s': %s, requeuing", key, err.Error())
 		}
 		// Finally, if no error occurs we Forget this item so it does not
 		// get queued again until another change happens.
 		c.workqueue.Forget(obj)
-		glog.Infof("Successfully synced '%s'", key)
+		klog.Infof("Successfully synced '%s'", key)
 		return nil
 	}(obj)
 
 	if err != nil {
-		runtime.HandleError(err)
+		utilruntime.HandleError(err)
 		return true
 	}
 
@@ -243,7 +244,7 @@ func (c *Controller) syncHandler(key string) error {
 	// Convert the namespace/name string into a distinct namespace and name
 	namespace, name, err := cache.SplitMetaNamespaceKey(key)
 	if err != nil {
-		runtime.HandleError(fmt.Errorf("invalid resource key: %s", key))
+		utilruntime.HandleError(fmt.Errorf("invalid resource key: %s", key))
 		return nil
 	}
 
@@ -253,7 +254,7 @@ func (c *Controller) syncHandler(key string) error {
 		// The Foo resource may no longer exist, in which case we stop
 		// processing.
 		if errors.IsNotFound(err) {
-			runtime.HandleError(fmt.Errorf("foo '%s' in work queue no longer exists", key))
+			utilruntime.HandleError(fmt.Errorf("foo '%s' in work queue no longer exists", key))
 			return nil
 		}
 
@@ -265,7 +266,7 @@ func (c *Controller) syncHandler(key string) error {
 		// We choose to absorb the error here as the worker would requeue the
 		// resource otherwise. Instead, the next time the resource is updated
 		// the resource will be queued again.
-		runtime.HandleError(fmt.Errorf("%s: deployment name must be specified", key))
+		utilruntime.HandleError(fmt.Errorf("%s: deployment name must be specified", key))
 		return nil
 	}
 
@@ -295,7 +296,7 @@ func (c *Controller) syncHandler(key string) error {
 	// number does not equal the current desired replicas on the Deployment, we
 	// should update the Deployment resource.
 	if foo.Spec.Replicas != nil && *foo.Spec.Replicas != *deployment.Spec.Replicas {
-		glog.V(4).Infof("Foo %s replicas: %d, deployment replicas: %d", name, *foo.Spec.Replicas, *deployment.Spec.Replicas)
+		klog.V(4).Infof("Foo %s replicas: %d, deployment replicas: %d", name, *foo.Spec.Replicas, *deployment.Spec.Replicas)
 		deployment, err = c.kubeclientset.AppsV1().Deployments(foo.Namespace).Update(newDeployment(foo))
 	}
 
@@ -338,7 +339,7 @@ func (c *Controller) enqueueFoo(obj interface{}) {
 	var key string
 	var err error
 	if key, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
-		runtime.HandleError(err)
+		utilruntime.HandleError(err)
 		return
 	}
 	c.workqueue.AddRateLimited(key)
@@ -355,17 +356,17 @@ func (c *Controller) handleObject(obj interface{}) {
 	if object, ok = obj.(metav1.Object); !ok {
 		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
 		if !ok {
-			runtime.HandleError(fmt.Errorf("error decoding object, invalid type"))
+			utilruntime.HandleError(fmt.Errorf("error decoding object, invalid type"))
 			return
 		}
 		object, ok = tombstone.Obj.(metav1.Object)
 		if !ok {
-			runtime.HandleError(fmt.Errorf("error decoding object tombstone, invalid type"))
+			utilruntime.HandleError(fmt.Errorf("error decoding object tombstone, invalid type"))
 			return
 		}
-		glog.V(4).Infof("Recovered deleted object '%s' from tombstone", object.GetName())
+		klog.V(4).Infof("Recovered deleted object '%s' from tombstone", object.GetName())
 	}
-	glog.V(4).Infof("Processing object: %s", object.GetName())
+	klog.V(4).Infof("Processing object: %s", object.GetName())
 	if ownerRef := metav1.GetControllerOf(object); ownerRef != nil {
 		// If this object is not owned by a Foo, we should not do anything more
 		// with it.
@@ -375,7 +376,7 @@ func (c *Controller) handleObject(obj interface{}) {
 
 		foo, err := c.foosLister.Foos(object.GetNamespace()).Get(ownerRef.Name)
 		if err != nil {
-			glog.V(4).Infof("ignoring orphaned object '%s' of foo '%s'", object.GetSelfLink(), ownerRef.Name)
+			klog.V(4).Infof("ignoring orphaned object '%s' of foo '%s'", object.GetSelfLink(), ownerRef.Name)
 			return
 		}
 

controller_test.go

@@ -34,8 +34,8 @@ import (
 	"k8s.io/client-go/tools/record"
 
 	samplecontroller "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
-	"k8s.io/sample-controller/pkg/client/clientset/versioned/fake"
-	informers "k8s.io/sample-controller/pkg/client/informers/externalversions"
+	"k8s.io/sample-controller/pkg/generated/clientset/versioned/fake"
+	informers "k8s.io/sample-controller/pkg/generated/informers/externalversions"
 )
 
 var (
@@ -198,7 +198,7 @@ func checkAction(expected, actual core.Action, t *testing.T) {
 		expPatch := e.GetPatch()
 		patch := a.GetPatch()
 
-		if !reflect.DeepEqual(expPatch, expPatch) {
+		if !reflect.DeepEqual(expPatch, patch) {
 			t.Errorf("Action %s %s has wrong patch\nDiff:\n %s",
 				a.GetVerb(), a.GetResource().Resource, diff.ObjectGoPrintDiff(expPatch, patch))
 		}

docs/controller-client-go.md

@@ -1,11 +1,11 @@
 # client-go under the hood
 
-The [client-go](https://github.com/kubernetes/client-go/) library contains various mechanisms that you can use when 
-developing your custom controllers. These mechanisms are defined in the 
+The [client-go](https://github.com/kubernetes/client-go/) library contains various mechanisms that you can use when
+developing your custom controllers. These mechanisms are defined in the
 [tools/cache folder](https://github.com/kubernetes/client-go/tree/master/tools/cache) of the library.
 
-Here is a pictorial representation showing how the various components in 
-the client-go library work and their interaction points with the custom 
+Here is a pictorial representation showing how the various components in
+the client-go library work and their interaction points with the custom
 controller code that you will write.
 
 <p align="center">
@@ -19,7 +19,7 @@ watches the Kubernetes API for the specified resource type (kind).
 The function in which this is done is *ListAndWatch*.
 The watch could be for an in-built resource or it could be for a custom resource.
 When the reflector receives notification about existence of new
-resource instance through the watch API, it gets the newly created object 
+resource instance through the watch API, it gets the newly created object
 using the corresponding listing API and puts it in the Delta Fifo queue
 inside the *watchHandler* function.
 
@@ -38,27 +38,27 @@ that generates an object’s key as `<namespace>/<name>` combination for that ob
 
 ## Custom Controller components
 
-* Informer reference: This is the reference to the Informer instance that knows 
-how to work with your custom resource objects. Your custom controller code needs 
+* Informer reference: This is the reference to the Informer instance that knows
+how to work with your custom resource objects. Your custom controller code needs
 to create the appropriate Informer.
 
-* Indexer reference: This is the reference to the Indexer instance that knows 
-how to work with your custom resource objects. Your custom controller code needs 
-to create this. You will be using this reference for retrieving objects for 
+* Indexer reference: This is the reference to the Indexer instance that knows
+how to work with your custom resource objects. Your custom controller code needs
+to create this. You will be using this reference for retrieving objects for
 later processing.
 
 The base controller in client-go provides the *NewIndexerInformer* function to create Informer and Indexer.
 In your code you can either [directly invoke this function](https://github.com/kubernetes/client-go/blob/master/examples/workqueue/main.go#L174) or [use factory methods for creating an informer.](https://github.com/kubernetes/sample-controller/blob/master/main.go#L61)
 
-* Resource Event Handlers: These are the callback functions which will be called by 
-the Informer when it wants to deliver an object to your controller. The typical 
+* Resource Event Handlers: These are the callback functions which will be called by
+the Informer when it wants to deliver an object to your controller. The typical
 pattern to write these functions is to obtain the dispatched object’s key
 and enqueue that key in a work queue for further processing.
 
-* Work queue: This is the queue that you create in your controller code to decouple 
-delivery of an object from its processing. Resource event handler functions are written 
+* Work queue: This is the queue that you create in your controller code to decouple
+delivery of an object from its processing. Resource event handler functions are written
 to extract the delivered object’s key and add that to the work queue.
 
-* Process Item: This is the function that you create in your code which processes items 
-from the work queue. There can be one or more other functions that do the actual processing. 
+* Process Item: This is the function that you create in your code which processes items
+from the work queue. There can be one or more other functions that do the actual processing.
 These functions will typically use the [Indexer reference](https://github.com/kubernetes/client-go/blob/master/examples/workqueue/main.go#L73), or a Listing wrapper to retrieve the object corresponding to the key.

hack/update-codegen.sh

@@ -18,18 +18,18 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
-CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+CODEGEN_PKG=${CODEGEN_PKG:-$(cd "${SCRIPT_ROOT}"; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
 
 # generate the code with:
 # --output-base    because this script should also be able to run inside the vendor dir of
 #                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
 #                  instead of the $GOPATH directly. For normal projects this can be dropped.
-${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
-  k8s.io/sample-controller/pkg/client k8s.io/sample-controller/pkg/apis \
+"${CODEGEN_PKG}"/generate-groups.sh "deepcopy,client,informer,lister" \
+  k8s.io/sample-controller/pkg/generated k8s.io/sample-controller/pkg/apis \
   samplecontroller:v1alpha1 \
-  --output-base "$(dirname ${BASH_SOURCE})/../../.." \
-  --go-header-file ${SCRIPT_ROOT}/hack/boilerplate.go.txt
+  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
+  --go-header-file "${SCRIPT_ROOT}"/hack/boilerplate.go.txt
 
-# To use your own boilerplate text use:
-#   --go-header-file ${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt
+# To use your own boilerplate text append:
+#   --go-header-file "${SCRIPT_ROOT}"/hack/custom-boilerplate.go.txt

hack/verify-codegen.sh

@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 
 DIFFROOT="${SCRIPT_ROOT}/pkg"
 TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/pkg"

main.go

@@ -20,15 +20,15 @@ import (
 	"flag"
 	"time"
 
-	"github.com/golang/glog"
 	kubeinformers "k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/clientcmd"
+	"k8s.io/klog"
 	// Uncomment the following line to load the gcp plugin (only required to authenticate against GKE clusters).
 	// _ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
 
-	clientset "k8s.io/sample-controller/pkg/client/clientset/versioned"
-	informers "k8s.io/sample-controller/pkg/client/informers/externalversions"
+	clientset "k8s.io/sample-controller/pkg/generated/clientset/versioned"
+	informers "k8s.io/sample-controller/pkg/generated/informers/externalversions"
 	"k8s.io/sample-controller/pkg/signals"
 )
 
@@ -45,17 +45,17 @@ func main() {
 
 	cfg, err := clientcmd.BuildConfigFromFlags(masterURL, kubeconfig)
 	if err != nil {
-		glog.Fatalf("Error building kubeconfig: %s", err.Error())
+		klog.Fatalf("Error building kubeconfig: %s", err.Error())
 	}
 
 	kubeClient, err := kubernetes.NewForConfig(cfg)
 	if err != nil {
-		glog.Fatalf("Error building kubernetes clientset: %s", err.Error())
+		klog.Fatalf("Error building kubernetes clientset: %s", err.Error())
 	}
 
 	exampleClient, err := clientset.NewForConfig(cfg)
 	if err != nil {
-		glog.Fatalf("Error building example clientset: %s", err.Error())
+		klog.Fatalf("Error building example clientset: %s", err.Error())
 	}
 
 	kubeInformerFactory := kubeinformers.NewSharedInformerFactory(kubeClient, time.Second*30)
@@ -65,11 +65,13 @@ func main() {
 		kubeInformerFactory.Apps().V1().Deployments(),
 		exampleInformerFactory.Samplecontroller().V1alpha1().Foos())
 
-	go kubeInformerFactory.Start(stopCh)
-	go exampleInformerFactory.Start(stopCh)
+	// notice that there is no need to run Start methods in a separate goroutine. (i.e. go kubeInformerFactory.Start(stopCh)
+	// Start method is non-blocking and runs all registered informers in a dedicated goroutine.
+	kubeInformerFactory.Start(stopCh)
+	exampleInformerFactory.Start(stopCh)
 
 	if err = controller.Run(2, stopCh); err != nil {
-		glog.Fatalf("Error running controller: %s", err.Error())
+		klog.Fatalf("Error running controller: %s", err.Error())
 	}
 }
 

pkg/apis/samplecontroller/v1alpha1/doc.go

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package
+// +groupName=samplecontroller.k8s.io
 
 // Package v1alpha1 is the v1alpha1 version of the API.
-// +groupName=samplecontroller.k8s.io
 package v1alpha1

pkg/generated/clientset/versioned/clientset.go

@@ -22,14 +22,12 @@ import (
 	discovery "k8s.io/client-go/discovery"
 	rest "k8s.io/client-go/rest"
 	flowcontrol "k8s.io/client-go/util/flowcontrol"
-	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/client/clientset/versioned/typed/samplecontroller/v1alpha1"
+	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1"
 )
 
 type Interface interface {
 	Discovery() discovery.DiscoveryInterface
 	SamplecontrollerV1alpha1() samplecontrollerv1alpha1.SamplecontrollerV1alpha1Interface
-	// Deprecated: please explicitly pick a version if possible.
-	Samplecontroller() samplecontrollerv1alpha1.SamplecontrollerV1alpha1Interface
 }
 
 // Clientset contains the clients for groups. Each group has exactly one
@@ -44,12 +42,6 @@ func (c *Clientset) SamplecontrollerV1alpha1() samplecontrollerv1alpha1.Sampleco
 	return c.samplecontrollerV1alpha1
 }
 
-// Deprecated: Samplecontroller retrieves the default version of SamplecontrollerClient.
-// Please explicitly pick a version.
-func (c *Clientset) Samplecontroller() samplecontrollerv1alpha1.SamplecontrollerV1alpha1Interface {
-	return c.samplecontrollerV1alpha1
-}
-
 // Discovery retrieves the DiscoveryClient
 func (c *Clientset) Discovery() discovery.DiscoveryInterface {
 	if c == nil {

pkg/generated/clientset/versioned/fake/clientset_generated.go

@@ -24,9 +24,9 @@ import (
 	"k8s.io/client-go/discovery"
 	fakediscovery "k8s.io/client-go/discovery/fake"
 	"k8s.io/client-go/testing"
-	clientset "k8s.io/sample-controller/pkg/client/clientset/versioned"
-	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/client/clientset/versioned/typed/samplecontroller/v1alpha1"
-	fakesamplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/client/clientset/versioned/typed/samplecontroller/v1alpha1/fake"
+	clientset "k8s.io/sample-controller/pkg/generated/clientset/versioned"
+	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1"
+	fakesamplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/fake"
 )
 
 // NewSimpleClientset returns a clientset that will respond with the provided objects.
@@ -75,8 +75,3 @@ var _ clientset.Interface = &Clientset{}
 func (c *Clientset) SamplecontrollerV1alpha1() samplecontrollerv1alpha1.SamplecontrollerV1alpha1Interface {
 	return &fakesamplecontrollerv1alpha1.FakeSamplecontrollerV1alpha1{Fake: &c.Fake}
 }
-
-// Samplecontroller retrieves the SamplecontrollerV1alpha1Client
-func (c *Clientset) Samplecontroller() samplecontrollerv1alpha1.SamplecontrollerV1alpha1Interface {
-	return &fakesamplecontrollerv1alpha1.FakeSamplecontrollerV1alpha1{Fake: &c.Fake}
-}

pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/fake/fake_foo.go

@@ -131,7 +131,7 @@ func (c *FakeFoos) DeleteCollection(options *v1.DeleteOptions, listOptions v1.Li
 // Patch applies the patch and returns the patched foo.
 func (c *FakeFoos) Patch(name string, pt types.PatchType, data []byte, subresources ...string) (result *v1alpha1.Foo, err error) {
 	obj, err := c.Fake.
-		Invokes(testing.NewPatchSubresourceAction(foosResource, c.ns, name, data, subresources...), &v1alpha1.Foo{})
+		Invokes(testing.NewPatchSubresourceAction(foosResource, c.ns, name, pt, data, subresources...), &v1alpha1.Foo{})
 
 	if obj == nil {
 		return nil, err

pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/fake/fake_samplecontroller_client.go

@@ -21,7 +21,7 @@ package fake
 import (
 	rest "k8s.io/client-go/rest"
 	testing "k8s.io/client-go/testing"
-	v1alpha1 "k8s.io/sample-controller/pkg/client/clientset/versioned/typed/samplecontroller/v1alpha1"
+	v1alpha1 "k8s.io/sample-controller/pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1"
 )
 
 type FakeSamplecontrollerV1alpha1 struct {

pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/foo.go

@@ -19,12 +19,14 @@ limitations under the License.
 package v1alpha1
 
 import (
+	"time"
+
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	types "k8s.io/apimachinery/pkg/types"
 	watch "k8s.io/apimachinery/pkg/watch"
 	rest "k8s.io/client-go/rest"
 	v1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
-	scheme "k8s.io/sample-controller/pkg/client/clientset/versioned/scheme"
+	scheme "k8s.io/sample-controller/pkg/generated/clientset/versioned/scheme"
 )
 
 // FoosGetter has a method to return a FooInterface.
@@ -76,11 +78,16 @@ func (c *foos) Get(name string, options v1.GetOptions) (result *v1alpha1.Foo, er
 
 // List takes label and field selectors, and returns the list of Foos that match those selectors.
 func (c *foos) List(opts v1.ListOptions) (result *v1alpha1.FooList, err error) {
+	var timeout time.Duration
+	if opts.TimeoutSeconds != nil {
+		timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
+	}
 	result = &v1alpha1.FooList{}
 	err = c.client.Get().
 		Namespace(c.ns).
 		Resource("foos").
 		VersionedParams(&opts, scheme.ParameterCodec).
+		Timeout(timeout).
 		Do().
 		Into(result)
 	return
@@ -88,11 +95,16 @@ func (c *foos) List(opts v1.ListOptions) (result *v1alpha1.FooList, err error) {
 
 // Watch returns a watch.Interface that watches the requested foos.
 func (c *foos) Watch(opts v1.ListOptions) (watch.Interface, error) {
+	var timeout time.Duration
+	if opts.TimeoutSeconds != nil {
+		timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
+	}
 	opts.Watch = true
 	return c.client.Get().
 		Namespace(c.ns).
 		Resource("foos").
 		VersionedParams(&opts, scheme.ParameterCodec).
+		Timeout(timeout).
 		Watch()
 }
 
@@ -150,10 +162,15 @@ func (c *foos) Delete(name string, options *v1.DeleteOptions) error {
 
 // DeleteCollection deletes a collection of objects.
 func (c *foos) DeleteCollection(options *v1.DeleteOptions, listOptions v1.ListOptions) error {
+	var timeout time.Duration
+	if listOptions.TimeoutSeconds != nil {
+		timeout = time.Duration(*listOptions.TimeoutSeconds) * time.Second
+	}
 	return c.client.Delete().
 		Namespace(c.ns).
 		Resource("foos").
 		VersionedParams(&listOptions, scheme.ParameterCodec).
+		Timeout(timeout).
 		Body(options).
 		Do().
 		Error()

pkg/generated/clientset/versioned/typed/samplecontroller/v1alpha1/samplecontroller_client.go

@@ -22,7 +22,7 @@ import (
 	serializer "k8s.io/apimachinery/pkg/runtime/serializer"
 	rest "k8s.io/client-go/rest"
 	v1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
-	"k8s.io/sample-controller/pkg/client/clientset/versioned/scheme"
+	"k8s.io/sample-controller/pkg/generated/clientset/versioned/scheme"
 )
 
 type SamplecontrollerV1alpha1Interface interface {

pkg/generated/informers/externalversions/factory.go

@@ -27,9 +27,9 @@ import (
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	schema "k8s.io/apimachinery/pkg/runtime/schema"
 	cache "k8s.io/client-go/tools/cache"
-	versioned "k8s.io/sample-controller/pkg/client/clientset/versioned"
-	internalinterfaces "k8s.io/sample-controller/pkg/client/informers/externalversions/internalinterfaces"
-	samplecontroller "k8s.io/sample-controller/pkg/client/informers/externalversions/samplecontroller"
+	versioned "k8s.io/sample-controller/pkg/generated/clientset/versioned"
+	internalinterfaces "k8s.io/sample-controller/pkg/generated/informers/externalversions/internalinterfaces"
+	samplecontroller "k8s.io/sample-controller/pkg/generated/informers/externalversions/samplecontroller"
 )
 
 // SharedInformerOption defines the functional option type for SharedInformerFactory.

pkg/generated/informers/externalversions/internalinterfaces/factory_interfaces.go

@@ -24,9 +24,10 @@ import (
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	cache "k8s.io/client-go/tools/cache"
-	versioned "k8s.io/sample-controller/pkg/client/clientset/versioned"
+	versioned "k8s.io/sample-controller/pkg/generated/clientset/versioned"
 )
 
+// NewInformerFunc takes versioned.Interface and time.Duration to return a SharedIndexInformer.
 type NewInformerFunc func(versioned.Interface, time.Duration) cache.SharedIndexInformer
 
 // SharedInformerFactory a small interface to allow for adding an informer without an import cycle
@@ -35,4 +36,5 @@ type SharedInformerFactory interface {
 	InformerFor(obj runtime.Object, newFunc NewInformerFunc) cache.SharedIndexInformer
 }
 
+// TweakListOptionsFunc is a function that transforms a v1.ListOptions.
 type TweakListOptionsFunc func(*v1.ListOptions)

pkg/generated/informers/externalversions/samplecontroller/interface.go

@@ -19,8 +19,8 @@ limitations under the License.
 package samplecontroller
 
 import (
-	internalinterfaces "k8s.io/sample-controller/pkg/client/informers/externalversions/internalinterfaces"
-	v1alpha1 "k8s.io/sample-controller/pkg/client/informers/externalversions/samplecontroller/v1alpha1"
+	internalinterfaces "k8s.io/sample-controller/pkg/generated/informers/externalversions/internalinterfaces"
+	v1alpha1 "k8s.io/sample-controller/pkg/generated/informers/externalversions/samplecontroller/v1alpha1"
 )
 
 // Interface provides access to each of this group's versions.

pkg/generated/informers/externalversions/samplecontroller/v1alpha1/foo.go

@@ -26,9 +26,9 @@ import (
 	watch "k8s.io/apimachinery/pkg/watch"
 	cache "k8s.io/client-go/tools/cache"
 	samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
-	versioned "k8s.io/sample-controller/pkg/client/clientset/versioned"
-	internalinterfaces "k8s.io/sample-controller/pkg/client/informers/externalversions/internalinterfaces"
-	v1alpha1 "k8s.io/sample-controller/pkg/client/listers/samplecontroller/v1alpha1"
+	versioned "k8s.io/sample-controller/pkg/generated/clientset/versioned"
+	internalinterfaces "k8s.io/sample-controller/pkg/generated/informers/externalversions/internalinterfaces"
+	v1alpha1 "k8s.io/sample-controller/pkg/generated/listers/samplecontroller/v1alpha1"
 )
 
 // FooInformer provides access to a shared informer and lister for

pkg/generated/informers/externalversions/samplecontroller/v1alpha1/interface.go

@@ -19,7 +19,7 @@ limitations under the License.
 package v1alpha1
 
 import (
-	internalinterfaces "k8s.io/sample-controller/pkg/client/informers/externalversions/internalinterfaces"
+	internalinterfaces "k8s.io/sample-controller/pkg/generated/informers/externalversions/internalinterfaces"
 )
 
 // Interface provides access to all the informers in this group version.

vendor/github.com/evanphx/json-patch/.travis.yml

@@ -0,0 +1,16 @@
+language: go
+
+go:
+  - 1.8
+  - 1.7
+
+install:
+  - if ! go get code.google.com/p/go.tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
+  - go get github.com/jessevdk/go-flags
+
+script:
+  - go get
+  - go test -cover ./...
+
+notifications:
+  email: false

vendor/github.com/evanphx/json-patch/LICENSE

@@ -0,0 +1,25 @@
+Copyright (c) 2014, Evan Phoenix
+All rights reserved.
+
+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 the Evan Phoenix 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.

vendor/github.com/evanphx/json-patch/README.md

@@ -0,0 +1,297 @@
+# JSON-Patch
+`jsonpatch` is a library which provides functionallity for both applying
+[RFC6902 JSON patches](http://tools.ietf.org/html/rfc6902) against documents, as
+well as for calculating & applying [RFC7396 JSON merge patches](https://tools.ietf.org/html/rfc7396).
+
+[![GoDoc](https://godoc.org/github.com/evanphx/json-patch?status.svg)](http://godoc.org/github.com/evanphx/json-patch)
+[![Build Status](https://travis-ci.org/evanphx/json-patch.svg?branch=master)](https://travis-ci.org/evanphx/json-patch)
+[![Report Card](https://goreportcard.com/badge/github.com/evanphx/json-patch)](https://goreportcard.com/report/github.com/evanphx/json-patch)
+
+# Get It!
+
+**Latest and greatest**: 
+```bash
+go get -u github.com/evanphx/json-patch
+```
+
+**Stable Versions**:
+* Version 4: `go get -u gopkg.in/evanphx/json-patch.v4`
+
+(previous versions below `v3` are unavailable)
+
+# Use It!
+* [Create and apply a merge patch](#create-and-apply-a-merge-patch)
+* [Create and apply a JSON Patch](#create-and-apply-a-json-patch)
+* [Comparing JSON documents](#comparing-json-documents)
+* [Combine merge patches](#combine-merge-patches)
+
+
+# Configuration
+
+* There is a global configuration variable `jsonpatch.SupportNegativeIndices`.
+  This defaults to `true` and enables the non-standard practice of allowing
+  negative indices to mean indices starting at the end of an array. This
+  functionality can be disabled by setting `jsonpatch.SupportNegativeIndices =
+  false`.
+
+* There is a global configuration variable `jsonpatch.AccumulatedCopySizeLimit`,
+  which limits the total size increase in bytes caused by "copy" operations in a
+  patch. It defaults to 0, which means there is no limit.
+
+## Create and apply a merge patch
+Given both an original JSON document and a modified JSON document, you can create
+a [Merge Patch](https://tools.ietf.org/html/rfc7396) document. 
+
+It can describe the changes needed to convert from the original to the 
+modified JSON document.
+
+Once you have a merge patch, you can apply it to other JSON documents using the
+`jsonpatch.MergePatch(document, patch)` function.
+
+```go
+package main
+
+import (
+	"fmt"
+
+	jsonpatch "github.com/evanphx/json-patch"
+)
+
+func main() {
+	// Let's create a merge patch from these two documents...
+	original := []byte(`{"name": "John", "age": 24, "height": 3.21}`)
+	target := []byte(`{"name": "Jane", "age": 24}`)
+
+	patch, err := jsonpatch.CreateMergePatch(original, target)
+	if err != nil {
+		panic(err)
+	}
+
+	// Now lets apply the patch against a different JSON document...
+
+	alternative := []byte(`{"name": "Tina", "age": 28, "height": 3.75}`)
+	modifiedAlternative, err := jsonpatch.MergePatch(alternative, patch)
+
+	fmt.Printf("patch document:   %s\n", patch)
+	fmt.Printf("updated alternative doc: %s\n", modifiedAlternative)
+}
+```
+
+When ran, you get the following output:
+
+```bash
+$ go run main.go
+patch document:   {"height":null,"name":"Jane"}
+updated tina doc: {"age":28,"name":"Jane"}
+```
+
+## Create and apply a JSON Patch
+You can create patch objects using `DecodePatch([]byte)`, which can then 
+be applied against JSON documents.
+
+The following is an example of creating a patch from two operations, and
+applying it against a JSON document.
+
+```go
+package main
+
+import (
+	"fmt"
+
+	jsonpatch "github.com/evanphx/json-patch"
+)
+
+func main() {
+	original := []byte(`{"name": "John", "age": 24, "height": 3.21}`)
+	patchJSON := []byte(`[
+		{"op": "replace", "path": "/name", "value": "Jane"},
+		{"op": "remove", "path": "/height"}
+	]`)
+
+	patch, err := jsonpatch.DecodePatch(patchJSON)
+	if err != nil {
+		panic(err)
+	}
+
+	modified, err := patch.Apply(original)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("Original document: %s\n", original)
+	fmt.Printf("Modified document: %s\n", modified)
+}
+```
+
+When ran, you get the following output:
+
+```bash
+$ go run main.go
+Original document: {"name": "John", "age": 24, "height": 3.21}
+Modified document: {"age":24,"name":"Jane"}
+```
+
+## Comparing JSON documents
+Due to potential whitespace and ordering differences, one cannot simply compare
+JSON strings or byte-arrays directly. 
+
+As such, you can instead use `jsonpatch.Equal(document1, document2)` to 
+determine if two JSON documents are _structurally_ equal. This ignores
+whitespace differences, and key-value ordering.
+
+```go
+package main
+
+import (
+	"fmt"
+
+	jsonpatch "github.com/evanphx/json-patch"
+)
+
+func main() {
+	original := []byte(`{"name": "John", "age": 24, "height": 3.21}`)
+	similar := []byte(`
+		{
+			"age": 24,
+			"height": 3.21,
+			"name": "John"
+		}
+	`)
+	different := []byte(`{"name": "Jane", "age": 20, "height": 3.37}`)
+
+	if jsonpatch.Equal(original, similar) {
+		fmt.Println(`"original" is structurally equal to "similar"`)
+	}
+
+	if !jsonpatch.Equal(original, different) {
+		fmt.Println(`"original" is _not_ structurally equal to "similar"`)
+	}
+}
+```
+
+When ran, you get the following output:
+```bash
+$ go run main.go
+"original" is structurally equal to "similar"
+"original" is _not_ structurally equal to "similar"
+```
+
+## Combine merge patches
+Given two JSON merge patch documents, it is possible to combine them into a 
+single merge patch which can describe both set of changes.
+
+The resulting merge patch can be used such that applying it results in a
+document structurally similar as merging each merge patch to the document
+in succession. 
+
+```go
+package main
+
+import (
+	"fmt"
+
+	jsonpatch "github.com/evanphx/json-patch"
+)
+
+func main() {
+	original := []byte(`{"name": "John", "age": 24, "height": 3.21}`)
+
+	nameAndHeight := []byte(`{"height":null,"name":"Jane"}`)
+	ageAndEyes := []byte(`{"age":4.23,"eyes":"blue"}`)
+
+	// Let's combine these merge patch documents...
+	combinedPatch, err := jsonpatch.MergeMergePatches(nameAndHeight, ageAndEyes)
+	if err != nil {
+		panic(err)
+	}
+
+	// Apply each patch individual against the original document
+	withoutCombinedPatch, err := jsonpatch.MergePatch(original, nameAndHeight)
+	if err != nil {
+		panic(err)
+	}
+
+	withoutCombinedPatch, err = jsonpatch.MergePatch(withoutCombinedPatch, ageAndEyes)
+	if err != nil {
+		panic(err)
+	}
+
+	// Apply the combined patch against the original document
+
+	withCombinedPatch, err := jsonpatch.MergePatch(original, combinedPatch)
+	if err != nil {
+		panic(err)
+	}
+
+	// Do both result in the same thing? They should!
+	if jsonpatch.Equal(withCombinedPatch, withoutCombinedPatch) {
+		fmt.Println("Both JSON documents are structurally the same!")
+	}
+
+	fmt.Printf("combined merge patch: %s", combinedPatch)
+}
+```
+
+When ran, you get the following output:
+```bash
+$ go run main.go
+Both JSON documents are structurally the same!
+combined merge patch: {"age":4.23,"eyes":"blue","height":null,"name":"Jane"}
+```
+
+# CLI for comparing JSON documents
+You can install the commandline program `json-patch`.
+
+This program can take multiple JSON patch documents as arguments, 
+and fed a JSON document from `stdin`. It will apply the patch(es) against 
+the document and output the modified doc.
+
+**patch.1.json**
+```json
+[
+    {"op": "replace", "path": "/name", "value": "Jane"},
+    {"op": "remove", "path": "/height"}
+]
+```
+
+**patch.2.json**
+```json
+[
+    {"op": "add", "path": "/address", "value": "123 Main St"},
+    {"op": "replace", "path": "/age", "value": "21"}
+]
+```
+
+**document.json**
+```json
+{
+    "name": "John",
+    "age": 24,
+    "height": 3.21
+}
+```
+
+You can then run:
+
+```bash
+$ go install github.com/evanphx/json-patch/cmd/json-patch
+$ cat document.json | json-patch -p patch.1.json -p patch.2.json
+{"address":"123 Main St","age":"21","name":"Jane"}
+```
+
+# Help It!
+Contributions are welcomed! Leave [an issue](https://github.com/evanphx/json-patch/issues)
+or [create a PR](https://github.com/evanphx/json-patch/compare).
+
+
+Before creating a pull request, we'd ask that you make sure tests are passing
+and that you have added new tests when applicable.
+
+Contributors can run tests using:
+
+```bash
+go test -cover ./...
+```
+
+Builds for pull requests are tested automatically 
+using [TravisCI](https://travis-ci.org/evanphx/json-patch).

vendor/github.com/evanphx/json-patch/errors.go

@@ -0,0 +1,38 @@
+package jsonpatch
+
+import "fmt"
+
+// AccumulatedCopySizeError is an error type returned when the accumulated size
+// increase caused by copy operations in a patch operation has exceeded the
+// limit.
+type AccumulatedCopySizeError struct {
+	limit       int64
+	accumulated int64
+}
+
+// NewAccumulatedCopySizeError returns an AccumulatedCopySizeError.
+func NewAccumulatedCopySizeError(l, a int64) *AccumulatedCopySizeError {
+	return &AccumulatedCopySizeError{limit: l, accumulated: a}
+}
+
+// Error implements the error interface.
+func (a *AccumulatedCopySizeError) Error() string {
+	return fmt.Sprintf("Unable to complete the copy, the accumulated size increase of copy is %d, exceeding the limit %d", a.accumulated, a.limit)
+}
+
+// ArraySizeError is an error type returned when the array size has exceeded
+// the limit.
+type ArraySizeError struct {
+	limit int
+	size  int
+}
+
+// NewArraySizeError returns an ArraySizeError.
+func NewArraySizeError(l, s int) *ArraySizeError {
+	return &ArraySizeError{limit: l, size: s}
+}
+
+// Error implements the error interface.
+func (a *ArraySizeError) Error() string {
+	return fmt.Sprintf("Unable to create array of size %d, limit is %d", a.size, a.limit)
+}

vendor/github.com/evanphx/json-patch/merge.go

@@ -0,0 +1,383 @@
+package jsonpatch
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"reflect"
+)
+
+func merge(cur, patch *lazyNode, mergeMerge bool) *lazyNode {
+	curDoc, err := cur.intoDoc()
+
+	if err != nil {
+		pruneNulls(patch)
+		return patch
+	}
+
+	patchDoc, err := patch.intoDoc()
+
+	if err != nil {
+		return patch
+	}
+
+	mergeDocs(curDoc, patchDoc, mergeMerge)
+
+	return cur
+}
+
+func mergeDocs(doc, patch *partialDoc, mergeMerge bool) {
+	for k, v := range *patch {
+		if v == nil {
+			if mergeMerge {
+				(*doc)[k] = nil
+			} else {
+				delete(*doc, k)
+			}
+		} else {
+			cur, ok := (*doc)[k]
+
+			if !ok || cur == nil {
+				pruneNulls(v)
+				(*doc)[k] = v
+			} else {
+				(*doc)[k] = merge(cur, v, mergeMerge)
+			}
+		}
+	}
+}
+
+func pruneNulls(n *lazyNode) {
+	sub, err := n.intoDoc()
+
+	if err == nil {
+		pruneDocNulls(sub)
+	} else {
+		ary, err := n.intoAry()
+
+		if err == nil {
+			pruneAryNulls(ary)
+		}
+	}
+}
+
+func pruneDocNulls(doc *partialDoc) *partialDoc {
+	for k, v := range *doc {
+		if v == nil {
+			delete(*doc, k)
+		} else {
+			pruneNulls(v)
+		}
+	}
+
+	return doc
+}
+
+func pruneAryNulls(ary *partialArray) *partialArray {
+	newAry := []*lazyNode{}
+
+	for _, v := range *ary {
+		if v != nil {
+			pruneNulls(v)
+			newAry = append(newAry, v)
+		}
+	}
+
+	*ary = newAry
+
+	return ary
+}
+
+var errBadJSONDoc = fmt.Errorf("Invalid JSON Document")
+var errBadJSONPatch = fmt.Errorf("Invalid JSON Patch")
+var errBadMergeTypes = fmt.Errorf("Mismatched JSON Documents")
+
+// MergeMergePatches merges two merge patches together, such that
+// applying this resulting merged merge patch to a document yields the same
+// as merging each merge patch to the document in succession.
+func MergeMergePatches(patch1Data, patch2Data []byte) ([]byte, error) {
+	return doMergePatch(patch1Data, patch2Data, true)
+}
+
+// MergePatch merges the patchData into the docData.
+func MergePatch(docData, patchData []byte) ([]byte, error) {
+	return doMergePatch(docData, patchData, false)
+}
+
+func doMergePatch(docData, patchData []byte, mergeMerge bool) ([]byte, error) {
+	doc := &partialDoc{}
+
+	docErr := json.Unmarshal(docData, doc)
+
+	patch := &partialDoc{}
+
+	patchErr := json.Unmarshal(patchData, patch)
+
+	if _, ok := docErr.(*json.SyntaxError); ok {
+		return nil, errBadJSONDoc
+	}
+
+	if _, ok := patchErr.(*json.SyntaxError); ok {
+		return nil, errBadJSONPatch
+	}
+
+	if docErr == nil && *doc == nil {
+		return nil, errBadJSONDoc
+	}
+
+	if patchErr == nil && *patch == nil {
+		return nil, errBadJSONPatch
+	}
+
+	if docErr != nil || patchErr != nil {
+		// Not an error, just not a doc, so we turn straight into the patch
+		if patchErr == nil {
+			if mergeMerge {
+				doc = patch
+			} else {
+				doc = pruneDocNulls(patch)
+			}
+		} else {
+			patchAry := &partialArray{}
+			patchErr = json.Unmarshal(patchData, patchAry)
+
+			if patchErr != nil {
+				return nil, errBadJSONPatch
+			}
+
+			pruneAryNulls(patchAry)
+
+			out, patchErr := json.Marshal(patchAry)
+
+			if patchErr != nil {
+				return nil, errBadJSONPatch
+			}
+
+			return out, nil
+		}
+	} else {
+		mergeDocs(doc, patch, mergeMerge)
+	}
+
+	return json.Marshal(doc)
+}
+
+// resemblesJSONArray indicates whether the byte-slice "appears" to be
+// a JSON array or not.
+// False-positives are possible, as this function does not check the internal
+// structure of the array. It only checks that the outer syntax is present and
+// correct.
+func resemblesJSONArray(input []byte) bool {
+	input = bytes.TrimSpace(input)
+
+	hasPrefix := bytes.HasPrefix(input, []byte("["))
+	hasSuffix := bytes.HasSuffix(input, []byte("]"))
+
+	return hasPrefix && hasSuffix
+}
+
+// CreateMergePatch will return a merge patch document capable of converting
+// the original document(s) to the modified document(s).
+// The parameters can be bytes of either two JSON Documents, or two arrays of
+// JSON documents.
+// The merge patch returned follows the specification defined at http://tools.ietf.org/html/draft-ietf-appsawg-json-merge-patch-07
+func CreateMergePatch(originalJSON, modifiedJSON []byte) ([]byte, error) {
+	originalResemblesArray := resemblesJSONArray(originalJSON)
+	modifiedResemblesArray := resemblesJSONArray(modifiedJSON)
+
+	// Do both byte-slices seem like JSON arrays?
+	if originalResemblesArray && modifiedResemblesArray {
+		return createArrayMergePatch(originalJSON, modifiedJSON)
+	}
+
+	// Are both byte-slices are not arrays? Then they are likely JSON objects...
+	if !originalResemblesArray && !modifiedResemblesArray {
+		return createObjectMergePatch(originalJSON, modifiedJSON)
+	}
+
+	// None of the above? Then return an error because of mismatched types.
+	return nil, errBadMergeTypes
+}
+
+// createObjectMergePatch will return a merge-patch document capable of
+// converting the original document to the modified document.
+func createObjectMergePatch(originalJSON, modifiedJSON []byte) ([]byte, error) {
+	originalDoc := map[string]interface{}{}
+	modifiedDoc := map[string]interface{}{}
+
+	err := json.Unmarshal(originalJSON, &originalDoc)
+	if err != nil {
+		return nil, errBadJSONDoc
+	}
+
+	err = json.Unmarshal(modifiedJSON, &modifiedDoc)
+	if err != nil {
+		return nil, errBadJSONDoc
+	}
+
+	dest, err := getDiff(originalDoc, modifiedDoc)
+	if err != nil {
+		return nil, err
+	}
+
+	return json.Marshal(dest)
+}
+
+// createArrayMergePatch will return an array of merge-patch documents capable
+// of converting the original document to the modified document for each
+// pair of JSON documents provided in the arrays.
+// Arrays of mismatched sizes will result in an error.
+func createArrayMergePatch(originalJSON, modifiedJSON []byte) ([]byte, error) {
+	originalDocs := []json.RawMessage{}
+	modifiedDocs := []json.RawMessage{}
+
+	err := json.Unmarshal(originalJSON, &originalDocs)
+	if err != nil {
+		return nil, errBadJSONDoc
+	}
+
+	err = json.Unmarshal(modifiedJSON, &modifiedDocs)
+	if err != nil {
+		return nil, errBadJSONDoc
+	}
+
+	total := len(originalDocs)
+	if len(modifiedDocs) != total {
+		return nil, errBadJSONDoc
+	}
+
+	result := []json.RawMessage{}
+	for i := 0; i < len(originalDocs); i++ {
+		original := originalDocs[i]
+		modified := modifiedDocs[i]
+
+		patch, err := createObjectMergePatch(original, modified)
+		if err != nil {
+			return nil, err
+		}
+
+		result = append(result, json.RawMessage(patch))
+	}
+
+	return json.Marshal(result)
+}
+
+// Returns true if the array matches (must be json types).
+// As is idiomatic for go, an empty array is not the same as a nil array.
+func matchesArray(a, b []interface{}) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	if (a == nil && b != nil) || (a != nil && b == nil) {
+		return false
+	}
+	for i := range a {
+		if !matchesValue(a[i], b[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// Returns true if the values matches (must be json types)
+// The types of the values must match, otherwise it will always return false
+// If two map[string]interface{} are given, all elements must match.
+func matchesValue(av, bv interface{}) bool {
+	if reflect.TypeOf(av) != reflect.TypeOf(bv) {
+		return false
+	}
+	switch at := av.(type) {
+	case string:
+		bt := bv.(string)
+		if bt == at {
+			return true
+		}
+	case float64:
+		bt := bv.(float64)
+		if bt == at {
+			return true
+		}
+	case bool:
+		bt := bv.(bool)
+		if bt == at {
+			return true
+		}
+	case nil:
+		// Both nil, fine.
+		return true
+	case map[string]interface{}:
+		bt := bv.(map[string]interface{})
+		for key := range at {
+			if !matchesValue(at[key], bt[key]) {
+				return false
+			}
+		}
+		for key := range bt {
+			if !matchesValue(at[key], bt[key]) {
+				return false
+			}
+		}
+		return true
+	case []interface{}:
+		bt := bv.([]interface{})
+		return matchesArray(at, bt)
+	}
+	return false
+}
+
+// getDiff returns the (recursive) difference between a and b as a map[string]interface{}.
+func getDiff(a, b map[string]interface{}) (map[string]interface{}, error) {
+	into := map[string]interface{}{}
+	for key, bv := range b {
+		av, ok := a[key]
+		// value was added
+		if !ok {
+			into[key] = bv
+			continue
+		}
+		// If types have changed, replace completely
+		if reflect.TypeOf(av) != reflect.TypeOf(bv) {
+			into[key] = bv
+			continue
+		}
+		// Types are the same, compare values
+		switch at := av.(type) {
+		case map[string]interface{}:
+			bt := bv.(map[string]interface{})
+			dst := make(map[string]interface{}, len(bt))
+			dst, err := getDiff(at, bt)
+			if err != nil {
+				return nil, err
+			}
+			if len(dst) > 0 {
+				into[key] = dst
+			}
+		case string, float64, bool:
+			if !matchesValue(av, bv) {
+				into[key] = bv
+			}
+		case []interface{}:
+			bt := bv.([]interface{})
+			if !matchesArray(at, bt) {
+				into[key] = bv
+			}
+		case nil:
+			switch bv.(type) {
+			case nil:
+				// Both nil, fine.
+			default:
+				into[key] = bv
+			}
+		default:
+			panic(fmt.Sprintf("Unknown type:%T in key %s", av, key))
+		}
+	}
+	// Now add all deleted values as nil
+	for key := range a {
+		_, found := b[key]
+		if !found {
+			into[key] = nil
+		}
+	}
+	return into, nil
+}

vendor/github.com/evanphx/json-patch/patch.go

@@ -0,0 +1,696 @@
+package jsonpatch
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+const (
+	eRaw = iota
+	eDoc
+	eAry
+)
+
+var (
+	// SupportNegativeIndices decides whether to support non-standard practice of
+	// allowing negative indices to mean indices starting at the end of an array.
+	// Default to true.
+	SupportNegativeIndices bool = true
+	// AccumulatedCopySizeLimit limits the total size increase in bytes caused by
+	// "copy" operations in a patch.
+	AccumulatedCopySizeLimit int64 = 0
+)
+
+type lazyNode struct {
+	raw   *json.RawMessage
+	doc   partialDoc
+	ary   partialArray
+	which int
+}
+
+type operation map[string]*json.RawMessage
+
+// Patch is an ordered collection of operations.
+type Patch []operation
+
+type partialDoc map[string]*lazyNode
+type partialArray []*lazyNode
+
+type container interface {
+	get(key string) (*lazyNode, error)
+	set(key string, val *lazyNode) error
+	add(key string, val *lazyNode) error
+	remove(key string) error
+}
+
+func newLazyNode(raw *json.RawMessage) *lazyNode {
+	return &lazyNode{raw: raw, doc: nil, ary: nil, which: eRaw}
+}
+
+func (n *lazyNode) MarshalJSON() ([]byte, error) {
+	switch n.which {
+	case eRaw:
+		return json.Marshal(n.raw)
+	case eDoc:
+		return json.Marshal(n.doc)
+	case eAry:
+		return json.Marshal(n.ary)
+	default:
+		return nil, fmt.Errorf("Unknown type")
+	}
+}
+
+func (n *lazyNode) UnmarshalJSON(data []byte) error {
+	dest := make(json.RawMessage, len(data))
+	copy(dest, data)
+	n.raw = &dest
+	n.which = eRaw
+	return nil
+}
+
+func deepCopy(src *lazyNode) (*lazyNode, int, error) {
+	if src == nil {
+		return nil, 0, nil
+	}
+	a, err := src.MarshalJSON()
+	if err != nil {
+		return nil, 0, err
+	}
+	sz := len(a)
+	ra := make(json.RawMessage, sz)
+	copy(ra, a)
+	return newLazyNode(&ra), sz, nil
+}
+
+func (n *lazyNode) intoDoc() (*partialDoc, error) {
+	if n.which == eDoc {
+		return &n.doc, nil
+	}
+
+	if n.raw == nil {
+		return nil, fmt.Errorf("Unable to unmarshal nil pointer as partial document")
+	}
+
+	err := json.Unmarshal(*n.raw, &n.doc)
+
+	if err != nil {
+		return nil, err
+	}
+
+	n.which = eDoc
+	return &n.doc, nil
+}
+
+func (n *lazyNode) intoAry() (*partialArray, error) {
+	if n.which == eAry {
+		return &n.ary, nil
+	}
+
+	if n.raw == nil {
+		return nil, fmt.Errorf("Unable to unmarshal nil pointer as partial array")
+	}
+
+	err := json.Unmarshal(*n.raw, &n.ary)
+
+	if err != nil {
+		return nil, err
+	}
+
+	n.which = eAry
+	return &n.ary, nil
+}
+
+func (n *lazyNode) compact() []byte {
+	buf := &bytes.Buffer{}
+
+	if n.raw == nil {
+		return nil
+	}
+
+	err := json.Compact(buf, *n.raw)
+
+	if err != nil {
+		return *n.raw
+	}
+
+	return buf.Bytes()
+}
+
+func (n *lazyNode) tryDoc() bool {
+	if n.raw == nil {
+		return false
+	}
+
+	err := json.Unmarshal(*n.raw, &n.doc)
+
+	if err != nil {
+		return false
+	}
+
+	n.which = eDoc
+	return true
+}
+
+func (n *lazyNode) tryAry() bool {
+	if n.raw == nil {
+		return false
+	}
+
+	err := json.Unmarshal(*n.raw, &n.ary)
+
+	if err != nil {
+		return false
+	}
+
+	n.which = eAry
+	return true
+}
+
+func (n *lazyNode) equal(o *lazyNode) bool {
+	if n.which == eRaw {
+		if !n.tryDoc() && !n.tryAry() {
+			if o.which != eRaw {
+				return false
+			}
+
+			return bytes.Equal(n.compact(), o.compact())
+		}
+	}
+
+	if n.which == eDoc {
+		if o.which == eRaw {
+			if !o.tryDoc() {
+				return false
+			}
+		}
+
+		if o.which != eDoc {
+			return false
+		}
+
+		for k, v := range n.doc {
+			ov, ok := o.doc[k]
+
+			if !ok {
+				return false
+			}
+
+			if v == nil && ov == nil {
+				continue
+			}
+
+			if !v.equal(ov) {
+				return false
+			}
+		}
+
+		return true
+	}
+
+	if o.which != eAry && !o.tryAry() {
+		return false
+	}
+
+	if len(n.ary) != len(o.ary) {
+		return false
+	}
+
+	for idx, val := range n.ary {
+		if !val.equal(o.ary[idx]) {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (o operation) kind() string {
+	if obj, ok := o["op"]; ok && obj != nil {
+		var op string
+
+		err := json.Unmarshal(*obj, &op)
+
+		if err != nil {
+			return "unknown"
+		}
+
+		return op
+	}
+
+	return "unknown"
+}
+
+func (o operation) path() string {
+	if obj, ok := o["path"]; ok && obj != nil {
+		var op string
+
+		err := json.Unmarshal(*obj, &op)
+
+		if err != nil {
+			return "unknown"
+		}
+
+		return op
+	}
+
+	return "unknown"
+}
+
+func (o operation) from() string {
+	if obj, ok := o["from"]; ok && obj != nil {
+		var op string
+
+		err := json.Unmarshal(*obj, &op)
+
+		if err != nil {
+			return "unknown"
+		}
+
+		return op
+	}
+
+	return "unknown"
+}
+
+func (o operation) value() *lazyNode {
+	if obj, ok := o["value"]; ok {
+		return newLazyNode(obj)
+	}
+
+	return nil
+}
+
+func isArray(buf []byte) bool {
+Loop:
+	for _, c := range buf {
+		switch c {
+		case ' ':
+		case '\n':
+		case '\t':
+			continue
+		case '[':
+			return true
+		default:
+			break Loop
+		}
+	}
+
+	return false
+}
+
+func findObject(pd *container, path string) (container, string) {
+	doc := *pd
+
+	split := strings.Split(path, "/")
+
+	if len(split) < 2 {
+		return nil, ""
+	}
+
+	parts := split[1 : len(split)-1]
+
+	key := split[len(split)-1]
+
+	var err error
+
+	for _, part := range parts {
+
+		next, ok := doc.get(decodePatchKey(part))
+
+		if next == nil || ok != nil {
+			return nil, ""
+		}
+
+		if isArray(*next.raw) {
+			doc, err = next.intoAry()
+
+			if err != nil {
+				return nil, ""
+			}
+		} else {
+			doc, err = next.intoDoc()
+
+			if err != nil {
+				return nil, ""
+			}
+		}
+	}
+
+	return doc, decodePatchKey(key)
+}
+
+func (d *partialDoc) set(key string, val *lazyNode) error {
+	(*d)[key] = val
+	return nil
+}
+
+func (d *partialDoc) add(key string, val *lazyNode) error {
+	(*d)[key] = val
+	return nil
+}
+
+func (d *partialDoc) get(key string) (*lazyNode, error) {
+	return (*d)[key], nil
+}
+
+func (d *partialDoc) remove(key string) error {
+	_, ok := (*d)[key]
+	if !ok {
+		return fmt.Errorf("Unable to remove nonexistent key: %s", key)
+	}
+
+	delete(*d, key)
+	return nil
+}
+
+// set should only be used to implement the "replace" operation, so "key" must
+// be an already existing index in "d".
+func (d *partialArray) set(key string, val *lazyNode) error {
+	idx, err := strconv.Atoi(key)
+	if err != nil {
+		return err
+	}
+	(*d)[idx] = val
+	return nil
+}
+
+func (d *partialArray) add(key string, val *lazyNode) error {
+	if key == "-" {
+		*d = append(*d, val)
+		return nil
+	}
+
+	idx, err := strconv.Atoi(key)
+	if err != nil {
+		return err
+	}
+
+	sz := len(*d) + 1
+
+	ary := make([]*lazyNode, sz)
+
+	cur := *d
+
+	if idx >= len(ary) {
+		return fmt.Errorf("Unable to access invalid index: %d", idx)
+	}
+
+	if SupportNegativeIndices {
+		if idx < -len(ary) {
+			return fmt.Errorf("Unable to access invalid index: %d", idx)
+		}
+
+		if idx < 0 {
+			idx += len(ary)
+		}
+	}
+
+	copy(ary[0:idx], cur[0:idx])
+	ary[idx] = val
+	copy(ary[idx+1:], cur[idx:])
+
+	*d = ary
+	return nil
+}
+
+func (d *partialArray) get(key string) (*lazyNode, error) {
+	idx, err := strconv.Atoi(key)
+
+	if err != nil {
+		return nil, err
+	}
+
+	if idx >= len(*d) {
+		return nil, fmt.Errorf("Unable to access invalid index: %d", idx)
+	}
+
+	return (*d)[idx], nil
+}
+
+func (d *partialArray) remove(key string) error {
+	idx, err := strconv.Atoi(key)
+	if err != nil {
+		return err
+	}
+
+	cur := *d
+
+	if idx >= len(cur) {
+		return fmt.Errorf("Unable to access invalid index: %d", idx)
+	}
+
+	if SupportNegativeIndices {
+		if idx < -len(cur) {
+			return fmt.Errorf("Unable to access invalid index: %d", idx)
+		}
+
+		if idx < 0 {
+			idx += len(cur)
+		}
+	}
+
+	ary := make([]*lazyNode, len(cur)-1)
+
+	copy(ary[0:idx], cur[0:idx])
+	copy(ary[idx:], cur[idx+1:])
+
+	*d = ary
+	return nil
+
+}
+
+func (p Patch) add(doc *container, op operation) error {
+	path := op.path()
+
+	con, key := findObject(doc, path)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch add operation does not apply: doc is missing path: \"%s\"", path)
+	}
+
+	return con.add(key, op.value())
+}
+
+func (p Patch) remove(doc *container, op operation) error {
+	path := op.path()
+
+	con, key := findObject(doc, path)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch remove operation does not apply: doc is missing path: \"%s\"", path)
+	}
+
+	return con.remove(key)
+}
+
+func (p Patch) replace(doc *container, op operation) error {
+	path := op.path()
+
+	con, key := findObject(doc, path)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch replace operation does not apply: doc is missing path: %s", path)
+	}
+
+	_, ok := con.get(key)
+	if ok != nil {
+		return fmt.Errorf("jsonpatch replace operation does not apply: doc is missing key: %s", path)
+	}
+
+	return con.set(key, op.value())
+}
+
+func (p Patch) move(doc *container, op operation) error {
+	from := op.from()
+
+	con, key := findObject(doc, from)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch move operation does not apply: doc is missing from path: %s", from)
+	}
+
+	val, err := con.get(key)
+	if err != nil {
+		return err
+	}
+
+	err = con.remove(key)
+	if err != nil {
+		return err
+	}
+
+	path := op.path()
+
+	con, key = findObject(doc, path)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch move operation does not apply: doc is missing destination path: %s", path)
+	}
+
+	return con.add(key, val)
+}
+
+func (p Patch) test(doc *container, op operation) error {
+	path := op.path()
+
+	con, key := findObject(doc, path)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch test operation does not apply: is missing path: %s", path)
+	}
+
+	val, err := con.get(key)
+
+	if err != nil {
+		return err
+	}
+
+	if val == nil {
+		if op.value().raw == nil {
+			return nil
+		}
+		return fmt.Errorf("Testing value %s failed", path)
+	} else if op.value() == nil {
+		return fmt.Errorf("Testing value %s failed", path)
+	}
+
+	if val.equal(op.value()) {
+		return nil
+	}
+
+	return fmt.Errorf("Testing value %s failed", path)
+}
+
+func (p Patch) copy(doc *container, op operation, accumulatedCopySize *int64) error {
+	from := op.from()
+
+	con, key := findObject(doc, from)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch copy operation does not apply: doc is missing from path: %s", from)
+	}
+
+	val, err := con.get(key)
+	if err != nil {
+		return err
+	}
+
+	path := op.path()
+
+	con, key = findObject(doc, path)
+
+	if con == nil {
+		return fmt.Errorf("jsonpatch copy operation does not apply: doc is missing destination path: %s", path)
+	}
+
+	valCopy, sz, err := deepCopy(val)
+	if err != nil {
+		return err
+	}
+	(*accumulatedCopySize) += int64(sz)
+	if AccumulatedCopySizeLimit > 0 && *accumulatedCopySize > AccumulatedCopySizeLimit {
+		return NewAccumulatedCopySizeError(AccumulatedCopySizeLimit, *accumulatedCopySize)
+	}
+
+	return con.add(key, valCopy)
+}
+
+// Equal indicates if 2 JSON documents have the same structural equality.
+func Equal(a, b []byte) bool {
+	ra := make(json.RawMessage, len(a))
+	copy(ra, a)
+	la := newLazyNode(&ra)
+
+	rb := make(json.RawMessage, len(b))
+	copy(rb, b)
+	lb := newLazyNode(&rb)
+
+	return la.equal(lb)
+}
+
+// DecodePatch decodes the passed JSON document as an RFC 6902 patch.
+func DecodePatch(buf []byte) (Patch, error) {
+	var p Patch
+
+	err := json.Unmarshal(buf, &p)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return p, nil
+}
+
+// Apply mutates a JSON document according to the patch, and returns the new
+// document.
+func (p Patch) Apply(doc []byte) ([]byte, error) {
+	return p.ApplyIndent(doc, "")
+}
+
+// ApplyIndent mutates a JSON document according to the patch, and returns the new
+// document indented.
+func (p Patch) ApplyIndent(doc []byte, indent string) ([]byte, error) {
+	var pd container
+	if doc[0] == '[' {
+		pd = &partialArray{}
+	} else {
+		pd = &partialDoc{}
+	}
+
+	err := json.Unmarshal(doc, pd)
+
+	if err != nil {
+		return nil, err
+	}
+
+	err = nil
+
+	var accumulatedCopySize int64
+
+	for _, op := range p {
+		switch op.kind() {
+		case "add":
+			err = p.add(&pd, op)
+		case "remove":
+			err = p.remove(&pd, op)
+		case "replace":
+			err = p.replace(&pd, op)
+		case "move":
+			err = p.move(&pd, op)
+		case "test":
+			err = p.test(&pd, op)
+		case "copy":
+			err = p.copy(&pd, op, &accumulatedCopySize)
+		default:
+			err = fmt.Errorf("Unexpected kind: %s", op.kind())
+		}
+
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if indent != "" {
+		return json.MarshalIndent(pd, "", indent)
+	}
+
+	return json.Marshal(pd)
+}
+
+// From http://tools.ietf.org/html/rfc6901#section-4 :
+//
+// Evaluation of each reference token begins by decoding any escaped
+// character sequence.  This is performed by first transforming any
+// occurrence of the sequence '~1' to '/', and then transforming any
+// occurrence of the sequence '~0' to '~'.
+
+var (
+	rfc6901Decoder = strings.NewReplacer("~1", "/", "~0", "~")
+)
+
+func decodePatchKey(k string) string {
+	return rfc6901Decoder.Replace(k)
+}

vendor/github.com/ghodss/yaml/.travis.yml

@@ -1,7 +0,0 @@
-language: go
-go:
-  - 1.3
-  - 1.4
-script:
-  - go test
-  - go build

vendor/github.com/gogo/protobuf/AUTHORS

@@ -10,5 +10,6 @@
 
 # Please keep the list sorted.
 
+Sendgrid, Inc
 Vastech SA (PTY) LTD
 Walter Schulze <awalterschulze@gmail.com>

vendor/github.com/gogo/protobuf/CONTRIBUTORS

@@ -1,4 +1,5 @@
 Anton Povarov <anton.povarov@gmail.com>
+Brian Goff <cpuguy83@gmail.com>
 Clayton Coleman <ccoleman@redhat.com>
 Denis Smirnov <denis.smirnov.91@gmail.com>
 DongYun Kang <ceram1000@gmail.com>
@@ -10,9 +11,12 @@ John Shahid <jvshahid@gmail.com>
 John Tuley <john@tuley.org>
 Laurent <laurent@adyoulike.com>
 Patrick Lee <patrick@dropbox.com>
+Roger Johansson <rogeralsing@gmail.com>
+Sam Nguyen <sam.nguyen@sendgrid.com>
 Sergio Arbeo <serabe@gmail.com>
 Stephen J Day <stephen.day@docker.com>
 Tamir Duberstein <tamird@gmail.com>
 Todd Eisenberger <teisenberger@dropbox.com>
 Tormod Erevik Lea <tormodlea@gmail.com>
+Vyacheslav Kim <kane@sendgrid.com>
 Walter Schulze <awalterschulze@gmail.com>

vendor/github.com/gogo/protobuf/proto/encode.go

@@ -174,11 +174,11 @@ func sizeFixed32(x uint64) int {
 // This is the format used for the sint64 protocol buffer type.
 func (p *Buffer) EncodeZigzag64(x uint64) error {
 	// use signed number to get arithmetic right shift.
-	return p.EncodeVarint(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+	return p.EncodeVarint((x << 1) ^ uint64((int64(x) >> 63)))
 }
 
 func sizeZigzag64(x uint64) int {
-	return sizeVarint(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+	return sizeVarint((x << 1) ^ uint64((int64(x) >> 63)))
 }
 
 // EncodeZigzag32 writes a zigzag-encoded 32-bit integer

vendor/github.com/gogo/protobuf/proto/lib.go

@@ -73,7 +73,6 @@ for a protocol buffer variable v:
 When the .proto file specifies `syntax="proto3"`, there are some differences:
 
   - Non-repeated fields of non-message type are values instead of pointers.
-  - Getters are only generated for message and oneof fields.
   - Enum types do not get an Enum method.
 
 The simplest way to describe this is to see an example.

vendor/github.com/gogo/protobuf/proto/properties.go

@@ -193,6 +193,7 @@ type Properties struct {
 	Default     string // default value
 	HasDefault  bool   // whether an explicit default was provided
 	CustomType  string
+	CastType    string
 	StdTime     bool
 	StdDuration bool
 
@@ -341,6 +342,8 @@ func (p *Properties) Parse(s string) {
 			p.OrigName = strings.Split(f, "=")[1]
 		case strings.HasPrefix(f, "customtype="):
 			p.CustomType = strings.Split(f, "=")[1]
+		case strings.HasPrefix(f, "casttype="):
+			p.CastType = strings.Split(f, "=")[1]
 		case f == "stdtime":
 			p.StdTime = true
 		case f == "stdduration":

vendor/github.com/gogo/protobuf/proto/text.go

@@ -522,6 +522,17 @@ func (tm *TextMarshaler) writeAny(w *textWriter, v reflect.Value, props *Propert
 				}
 				return nil
 			}
+		} else if len(props.CastType) > 0 {
+			if _, ok := v.Interface().(interface {
+				String() string
+			}); ok {
+				switch v.Kind() {
+				case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+					reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+					_, err := fmt.Fprintf(w, "%d", v.Interface())
+					return err
+				}
+			}
 		} else if props.StdTime {
 			t, ok := v.Interface().(time.Time)
 			if !ok {
@@ -531,9 +542,9 @@ func (tm *TextMarshaler) writeAny(w *textWriter, v reflect.Value, props *Propert
 			if err != nil {
 				return err
 			}
-			props.StdTime = false
-			err = tm.writeAny(w, reflect.ValueOf(tproto), props)
-			props.StdTime = true
+			propsCopy := *props // Make a copy so that this is goroutine-safe
+			propsCopy.StdTime = false
+			err = tm.writeAny(w, reflect.ValueOf(tproto), &propsCopy)
 			return err
 		} else if props.StdDuration {
 			d, ok := v.Interface().(time.Duration)
@@ -541,9 +552,9 @@ func (tm *TextMarshaler) writeAny(w *textWriter, v reflect.Value, props *Propert
 				return fmt.Errorf("stdtime is not time.Duration, but %T", v.Interface())
 			}
 			dproto := durationProto(d)
-			props.StdDuration = false
-			err := tm.writeAny(w, reflect.ValueOf(dproto), props)
-			props.StdDuration = true
+			propsCopy := *props // Make a copy so that this is goroutine-safe
+			propsCopy.StdDuration = false
+			err := tm.writeAny(w, reflect.ValueOf(dproto), &propsCopy)
 			return err
 		}
 	}

vendor/github.com/gogo/protobuf/proto/text_parser.go

@@ -983,7 +983,7 @@ func (p *textParser) readAny(v reflect.Value, props *Properties) error {
 		return p.readStruct(fv, terminator)
 	case reflect.Uint32:
 		if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
-			fv.SetUint(uint64(x))
+			fv.SetUint(x)
 			return nil
 		}
 	case reflect.Uint64:

vendor/github.com/golang/glog/README

@@ -1,44 +0,0 @@
-glog
-====
-
-Leveled execution logs for Go.
-
-This is an efficient pure Go implementation of leveled logs in the
-manner of the open source C++ package
-	http://code.google.com/p/google-glog
-
-By binding methods to booleans it is possible to use the log package
-without paying the expense of evaluating the arguments to the log.
-Through the -vmodule flag, the package also provides fine-grained
-control over logging at the file level.
-
-The comment from glog.go introduces the ideas:
-
-	Package glog implements logging analogous to the Google-internal
-	C++ INFO/ERROR/V setup.  It provides functions Info, Warning,
-	Error, Fatal, plus formatting variants such as Infof. It
-	also provides V-style logging controlled by the -v and
-	-vmodule=file=2 flags.
-	
-	Basic examples:
-	
-		glog.Info("Prepare to repel boarders")
-	
-		glog.Fatalf("Initialization failed: %s", err)
-	
-	See the documentation for the V function for an explanation
-	of these examples:
-	
-		if glog.V(2) {
-			glog.Info("Starting transaction...")
-		}
-	
-		glog.V(2).Infoln("Processed", nItems, "elements")
-
-
-The repository contains an open source version of the log package
-used inside Google. The master copy of the source lives inside
-Google, not here. The code in this repo is for export only and is not itself
-under development. Feature requests will be ignored.
-
-Send bug reports to golang-nuts@googlegroups.com.

vendor/github.com/google/btree/.travis.yml

@@ -1 +0,0 @@
-language: go

vendor/github.com/google/btree/README.md

@@ -1,12 +0,0 @@
-# BTree implementation for Go
-
-![Travis CI Build Status](https://api.travis-ci.org/google/btree.svg?branch=master)
-
-This package provides an in-memory B-Tree implementation for Go, useful as
-an ordered, mutable data structure.
-
-The API is based off of the wonderful
-http://godoc.org/github.com/petar/GoLLRB/llrb, and is meant to allow btree to
-act as a drop-in replacement for gollrb trees.
-
-See http://godoc.org/github.com/google/btree for documentation.

vendor/github.com/google/btree/btree.go

@@ -1,649 +0,0 @@
-// Copyright 2014 Google Inc.
-//
-// 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 btree implements in-memory B-Trees of arbitrary degree.
-//
-// btree implements an in-memory B-Tree for use as an ordered data structure.
-// It is not meant for persistent storage solutions.
-//
-// It has a flatter structure than an equivalent red-black or other binary tree,
-// which in some cases yields better memory usage and/or performance.
-// See some discussion on the matter here:
-//   http://google-opensource.blogspot.com/2013/01/c-containers-that-save-memory-and-time.html
-// Note, though, that this project is in no way related to the C++ B-Tree
-// implmentation written about there.
-//
-// Within this tree, each node contains a slice of items and a (possibly nil)
-// slice of children.  For basic numeric values or raw structs, this can cause
-// efficiency differences when compared to equivalent C++ template code that
-// stores values in arrays within the node:
-//   * Due to the overhead of storing values as interfaces (each
-//     value needs to be stored as the value itself, then 2 words for the
-//     interface pointing to that value and its type), resulting in higher
-//     memory use.
-//   * Since interfaces can point to values anywhere in memory, values are
-//     most likely not stored in contiguous blocks, resulting in a higher
-//     number of cache misses.
-// These issues don't tend to matter, though, when working with strings or other
-// heap-allocated structures, since C++-equivalent structures also must store
-// pointers and also distribute their values across the heap.
-//
-// This implementation is designed to be a drop-in replacement to gollrb.LLRB
-// trees, (http://github.com/petar/gollrb), an excellent and probably the most
-// widely used ordered tree implementation in the Go ecosystem currently.
-// Its functions, therefore, exactly mirror those of
-// llrb.LLRB where possible.  Unlike gollrb, though, we currently don't
-// support storing multiple equivalent values or backwards iteration.
-package btree
-
-import (
-	"fmt"
-	"io"
-	"sort"
-	"strings"
-)
-
-// Item represents a single object in the tree.
-type Item interface {
-	// Less tests whether the current item is less than the given argument.
-	//
-	// This must provide a strict weak ordering.
-	// If !a.Less(b) && !b.Less(a), we treat this to mean a == b (i.e. we can only
-	// hold one of either a or b in the tree).
-	Less(than Item) bool
-}
-
-const (
-	DefaultFreeListSize = 32
-)
-
-// FreeList represents a free list of btree nodes. By default each
-// BTree has its own FreeList, but multiple BTrees can share the same
-// FreeList.
-// Two Btrees using the same freelist are not safe for concurrent write access.
-type FreeList struct {
-	freelist []*node
-}
-
-// NewFreeList creates a new free list.
-// size is the maximum size of the returned free list.
-func NewFreeList(size int) *FreeList {
-	return &FreeList{freelist: make([]*node, 0, size)}
-}
-
-func (f *FreeList) newNode() (n *node) {
-	index := len(f.freelist) - 1
-	if index < 0 {
-		return new(node)
-	}
-	f.freelist, n = f.freelist[:index], f.freelist[index]
-	return
-}
-
-func (f *FreeList) freeNode(n *node) {
-	if len(f.freelist) < cap(f.freelist) {
-		f.freelist = append(f.freelist, n)
-	}
-}
-
-// ItemIterator allows callers of Ascend* to iterate in-order over portions of
-// the tree.  When this function returns false, iteration will stop and the
-// associated Ascend* function will immediately return.
-type ItemIterator func(i Item) bool
-
-// New creates a new B-Tree with the given degree.
-//
-// New(2), for example, will create a 2-3-4 tree (each node contains 1-3 items
-// and 2-4 children).
-func New(degree int) *BTree {
-	return NewWithFreeList(degree, NewFreeList(DefaultFreeListSize))
-}
-
-// NewWithFreeList creates a new B-Tree that uses the given node free list.
-func NewWithFreeList(degree int, f *FreeList) *BTree {
-	if degree <= 1 {
-		panic("bad degree")
-	}
-	return &BTree{
-		degree:   degree,
-		freelist: f,
-	}
-}
-
-// items stores items in a node.
-type items []Item
-
-// insertAt inserts a value into the given index, pushing all subsequent values
-// forward.
-func (s *items) insertAt(index int, item Item) {
-	*s = append(*s, nil)
-	if index < len(*s) {
-		copy((*s)[index+1:], (*s)[index:])
-	}
-	(*s)[index] = item
-}
-
-// removeAt removes a value at a given index, pulling all subsequent values
-// back.
-func (s *items) removeAt(index int) Item {
-	item := (*s)[index]
-	(*s)[index] = nil
-	copy((*s)[index:], (*s)[index+1:])
-	*s = (*s)[:len(*s)-1]
-	return item
-}
-
-// pop removes and returns the last element in the list.
-func (s *items) pop() (out Item) {
-	index := len(*s) - 1
-	out = (*s)[index]
-	(*s)[index] = nil
-	*s = (*s)[:index]
-	return
-}
-
-// find returns the index where the given item should be inserted into this
-// list.  'found' is true if the item already exists in the list at the given
-// index.
-func (s items) find(item Item) (index int, found bool) {
-	i := sort.Search(len(s), func(i int) bool {
-		return item.Less(s[i])
-	})
-	if i > 0 && !s[i-1].Less(item) {
-		return i - 1, true
-	}
-	return i, false
-}
-
-// children stores child nodes in a node.
-type children []*node
-
-// insertAt inserts a value into the given index, pushing all subsequent values
-// forward.
-func (s *children) insertAt(index int, n *node) {
-	*s = append(*s, nil)
-	if index < len(*s) {
-		copy((*s)[index+1:], (*s)[index:])
-	}
-	(*s)[index] = n
-}
-
-// removeAt removes a value at a given index, pulling all subsequent values
-// back.
-func (s *children) removeAt(index int) *node {
-	n := (*s)[index]
-	(*s)[index] = nil
-	copy((*s)[index:], (*s)[index+1:])
-	*s = (*s)[:len(*s)-1]
-	return n
-}
-
-// pop removes and returns the last element in the list.
-func (s *children) pop() (out *node) {
-	index := len(*s) - 1
-	out = (*s)[index]
-	(*s)[index] = nil
-	*s = (*s)[:index]
-	return
-}
-
-// node is an internal node in a tree.
-//
-// It must at all times maintain the invariant that either
-//   * len(children) == 0, len(items) unconstrained
-//   * len(children) == len(items) + 1
-type node struct {
-	items    items
-	children children
-	t        *BTree
-}
-
-// split splits the given node at the given index.  The current node shrinks,
-// and this function returns the item that existed at that index and a new node
-// containing all items/children after it.
-func (n *node) split(i int) (Item, *node) {
-	item := n.items[i]
-	next := n.t.newNode()
-	next.items = append(next.items, n.items[i+1:]...)
-	n.items = n.items[:i]
-	if len(n.children) > 0 {
-		next.children = append(next.children, n.children[i+1:]...)
-		n.children = n.children[:i+1]
-	}
-	return item, next
-}
-
-// maybeSplitChild checks if a child should be split, and if so splits it.
-// Returns whether or not a split occurred.
-func (n *node) maybeSplitChild(i, maxItems int) bool {
-	if len(n.children[i].items) < maxItems {
-		return false
-	}
-	first := n.children[i]
-	item, second := first.split(maxItems / 2)
-	n.items.insertAt(i, item)
-	n.children.insertAt(i+1, second)
-	return true
-}
-
-// insert inserts an item into the subtree rooted at this node, making sure
-// no nodes in the subtree exceed maxItems items.  Should an equivalent item be
-// be found/replaced by insert, it will be returned.
-func (n *node) insert(item Item, maxItems int) Item {
-	i, found := n.items.find(item)
-	if found {
-		out := n.items[i]
-		n.items[i] = item
-		return out
-	}
-	if len(n.children) == 0 {
-		n.items.insertAt(i, item)
-		return nil
-	}
-	if n.maybeSplitChild(i, maxItems) {
-		inTree := n.items[i]
-		switch {
-		case item.Less(inTree):
-			// no change, we want first split node
-		case inTree.Less(item):
-			i++ // we want second split node
-		default:
-			out := n.items[i]
-			n.items[i] = item
-			return out
-		}
-	}
-	return n.children[i].insert(item, maxItems)
-}
-
-// get finds the given key in the subtree and returns it.
-func (n *node) get(key Item) Item {
-	i, found := n.items.find(key)
-	if found {
-		return n.items[i]
-	} else if len(n.children) > 0 {
-		return n.children[i].get(key)
-	}
-	return nil
-}
-
-// min returns the first item in the subtree.
-func min(n *node) Item {
-	if n == nil {
-		return nil
-	}
-	for len(n.children) > 0 {
-		n = n.children[0]
-	}
-	if len(n.items) == 0 {
-		return nil
-	}
-	return n.items[0]
-}
-
-// max returns the last item in the subtree.
-func max(n *node) Item {
-	if n == nil {
-		return nil
-	}
-	for len(n.children) > 0 {
-		n = n.children[len(n.children)-1]
-	}
-	if len(n.items) == 0 {
-		return nil
-	}
-	return n.items[len(n.items)-1]
-}
-
-// toRemove details what item to remove in a node.remove call.
-type toRemove int
-
-const (
-	removeItem toRemove = iota // removes the given item
-	removeMin                  // removes smallest item in the subtree
-	removeMax                  // removes largest item in the subtree
-)
-
-// remove removes an item from the subtree rooted at this node.
-func (n *node) remove(item Item, minItems int, typ toRemove) Item {
-	var i int
-	var found bool
-	switch typ {
-	case removeMax:
-		if len(n.children) == 0 {
-			return n.items.pop()
-		}
-		i = len(n.items)
-	case removeMin:
-		if len(n.children) == 0 {
-			return n.items.removeAt(0)
-		}
-		i = 0
-	case removeItem:
-		i, found = n.items.find(item)
-		if len(n.children) == 0 {
-			if found {
-				return n.items.removeAt(i)
-			}
-			return nil
-		}
-	default:
-		panic("invalid type")
-	}
-	// If we get to here, we have children.
-	child := n.children[i]
-	if len(child.items) <= minItems {
-		return n.growChildAndRemove(i, item, minItems, typ)
-	}
-	// Either we had enough items to begin with, or we've done some
-	// merging/stealing, because we've got enough now and we're ready to return
-	// stuff.
-	if found {
-		// The item exists at index 'i', and the child we've selected can give us a
-		// predecessor, since if we've gotten here it's got > minItems items in it.
-		out := n.items[i]
-		// We use our special-case 'remove' call with typ=maxItem to pull the
-		// predecessor of item i (the rightmost leaf of our immediate left child)
-		// and set it into where we pulled the item from.
-		n.items[i] = child.remove(nil, minItems, removeMax)
-		return out
-	}
-	// Final recursive call.  Once we're here, we know that the item isn't in this
-	// node and that the child is big enough to remove from.
-	return child.remove(item, minItems, typ)
-}
-
-// growChildAndRemove grows child 'i' to make sure it's possible to remove an
-// item from it while keeping it at minItems, then calls remove to actually
-// remove it.
-//
-// Most documentation says we have to do two sets of special casing:
-//   1) item is in this node
-//   2) item is in child
-// In both cases, we need to handle the two subcases:
-//   A) node has enough values that it can spare one
-//   B) node doesn't have enough values
-// For the latter, we have to check:
-//   a) left sibling has node to spare
-//   b) right sibling has node to spare
-//   c) we must merge
-// To simplify our code here, we handle cases #1 and #2 the same:
-// If a node doesn't have enough items, we make sure it does (using a,b,c).
-// We then simply redo our remove call, and the second time (regardless of
-// whether we're in case 1 or 2), we'll have enough items and can guarantee
-// that we hit case A.
-func (n *node) growChildAndRemove(i int, item Item, minItems int, typ toRemove) Item {
-	child := n.children[i]
-	if i > 0 && len(n.children[i-1].items) > minItems {
-		// Steal from left child
-		stealFrom := n.children[i-1]
-		stolenItem := stealFrom.items.pop()
-		child.items.insertAt(0, n.items[i-1])
-		n.items[i-1] = stolenItem
-		if len(stealFrom.children) > 0 {
-			child.children.insertAt(0, stealFrom.children.pop())
-		}
-	} else if i < len(n.items) && len(n.children[i+1].items) > minItems {
-		// steal from right child
-		stealFrom := n.children[i+1]
-		stolenItem := stealFrom.items.removeAt(0)
-		child.items = append(child.items, n.items[i])
-		n.items[i] = stolenItem
-		if len(stealFrom.children) > 0 {
-			child.children = append(child.children, stealFrom.children.removeAt(0))
-		}
-	} else {
-		if i >= len(n.items) {
-			i--
-			child = n.children[i]
-		}
-		// merge with right child
-		mergeItem := n.items.removeAt(i)
-		mergeChild := n.children.removeAt(i + 1)
-		child.items = append(child.items, mergeItem)
-		child.items = append(child.items, mergeChild.items...)
-		child.children = append(child.children, mergeChild.children...)
-		n.t.freeNode(mergeChild)
-	}
-	return n.remove(item, minItems, typ)
-}
-
-// iterate provides a simple method for iterating over elements in the tree.
-// It could probably use some work to be extra-efficient (it calls from() a
-// little more than it should), but it works pretty well for now.
-//
-// It requires that 'from' and 'to' both return true for values we should hit
-// with the iterator.  It should also be the case that 'from' returns true for
-// values less than or equal to values 'to' returns true for, and 'to'
-// returns true for values greater than or equal to those that 'from'
-// does.
-func (n *node) iterate(from, to func(Item) bool, iter ItemIterator) bool {
-	for i, item := range n.items {
-		if !from(item) {
-			continue
-		}
-		if len(n.children) > 0 && !n.children[i].iterate(from, to, iter) {
-			return false
-		}
-		if !to(item) {
-			return false
-		}
-		if !iter(item) {
-			return false
-		}
-	}
-	if len(n.children) > 0 {
-		return n.children[len(n.children)-1].iterate(from, to, iter)
-	}
-	return true
-}
-
-// Used for testing/debugging purposes.
-func (n *node) print(w io.Writer, level int) {
-	fmt.Fprintf(w, "%sNODE:%v\n", strings.Repeat("  ", level), n.items)
-	for _, c := range n.children {
-		c.print(w, level+1)
-	}
-}
-
-// BTree is an implementation of a B-Tree.
-//
-// BTree stores Item instances in an ordered structure, allowing easy insertion,
-// removal, and iteration.
-//
-// Write operations are not safe for concurrent mutation by multiple
-// goroutines, but Read operations are.
-type BTree struct {
-	degree   int
-	length   int
-	root     *node
-	freelist *FreeList
-}
-
-// maxItems returns the max number of items to allow per node.
-func (t *BTree) maxItems() int {
-	return t.degree*2 - 1
-}
-
-// minItems returns the min number of items to allow per node (ignored for the
-// root node).
-func (t *BTree) minItems() int {
-	return t.degree - 1
-}
-
-func (t *BTree) newNode() (n *node) {
-	n = t.freelist.newNode()
-	n.t = t
-	return
-}
-
-func (t *BTree) freeNode(n *node) {
-	for i := range n.items {
-		n.items[i] = nil // clear to allow GC
-	}
-	n.items = n.items[:0]
-	for i := range n.children {
-		n.children[i] = nil // clear to allow GC
-	}
-	n.children = n.children[:0]
-	n.t = nil // clear to allow GC
-	t.freelist.freeNode(n)
-}
-
-// ReplaceOrInsert adds the given item to the tree.  If an item in the tree
-// already equals the given one, it is removed from the tree and returned.
-// Otherwise, nil is returned.
-//
-// nil cannot be added to the tree (will panic).
-func (t *BTree) ReplaceOrInsert(item Item) Item {
-	if item == nil {
-		panic("nil item being added to BTree")
-	}
-	if t.root == nil {
-		t.root = t.newNode()
-		t.root.items = append(t.root.items, item)
-		t.length++
-		return nil
-	} else if len(t.root.items) >= t.maxItems() {
-		item2, second := t.root.split(t.maxItems() / 2)
-		oldroot := t.root
-		t.root = t.newNode()
-		t.root.items = append(t.root.items, item2)
-		t.root.children = append(t.root.children, oldroot, second)
-	}
-	out := t.root.insert(item, t.maxItems())
-	if out == nil {
-		t.length++
-	}
-	return out
-}
-
-// Delete removes an item equal to the passed in item from the tree, returning
-// it.  If no such item exists, returns nil.
-func (t *BTree) Delete(item Item) Item {
-	return t.deleteItem(item, removeItem)
-}
-
-// DeleteMin removes the smallest item in the tree and returns it.
-// If no such item exists, returns nil.
-func (t *BTree) DeleteMin() Item {
-	return t.deleteItem(nil, removeMin)
-}
-
-// DeleteMax removes the largest item in the tree and returns it.
-// If no such item exists, returns nil.
-func (t *BTree) DeleteMax() Item {
-	return t.deleteItem(nil, removeMax)
-}
-
-func (t *BTree) deleteItem(item Item, typ toRemove) Item {
-	if t.root == nil || len(t.root.items) == 0 {
-		return nil
-	}
-	out := t.root.remove(item, t.minItems(), typ)
-	if len(t.root.items) == 0 && len(t.root.children) > 0 {
-		oldroot := t.root
-		t.root = t.root.children[0]
-		t.freeNode(oldroot)
-	}
-	if out != nil {
-		t.length--
-	}
-	return out
-}
-
-// AscendRange calls the iterator for every value in the tree within the range
-// [greaterOrEqual, lessThan), until iterator returns false.
-func (t *BTree) AscendRange(greaterOrEqual, lessThan Item, iterator ItemIterator) {
-	if t.root == nil {
-		return
-	}
-	t.root.iterate(
-		func(a Item) bool { return !a.Less(greaterOrEqual) },
-		func(a Item) bool { return a.Less(lessThan) },
-		iterator)
-}
-
-// AscendLessThan calls the iterator for every value in the tree within the range
-// [first, pivot), until iterator returns false.
-func (t *BTree) AscendLessThan(pivot Item, iterator ItemIterator) {
-	if t.root == nil {
-		return
-	}
-	t.root.iterate(
-		func(a Item) bool { return true },
-		func(a Item) bool { return a.Less(pivot) },
-		iterator)
-}
-
-// AscendGreaterOrEqual calls the iterator for every value in the tree within
-// the range [pivot, last], until iterator returns false.
-func (t *BTree) AscendGreaterOrEqual(pivot Item, iterator ItemIterator) {
-	if t.root == nil {
-		return
-	}
-	t.root.iterate(
-		func(a Item) bool { return !a.Less(pivot) },
-		func(a Item) bool { return true },
-		iterator)
-}
-
-// Ascend calls the iterator for every value in the tree within the range
-// [first, last], until iterator returns false.
-func (t *BTree) Ascend(iterator ItemIterator) {
-	if t.root == nil {
-		return
-	}
-	t.root.iterate(
-		func(a Item) bool { return true },
-		func(a Item) bool { return true },
-		iterator)
-}
-
-// Get looks for the key item in the tree, returning it.  It returns nil if
-// unable to find that item.
-func (t *BTree) Get(key Item) Item {
-	if t.root == nil {
-		return nil
-	}
-	return t.root.get(key)
-}
-
-// Min returns the smallest item in the tree, or nil if the tree is empty.
-func (t *BTree) Min() Item {
-	return min(t.root)
-}
-
-// Max returns the largest item in the tree, or nil if the tree is empty.
-func (t *BTree) Max() Item {
-	return max(t.root)
-}
-
-// Has returns true if the given key is in the tree.
-func (t *BTree) Has(key Item) bool {
-	return t.Get(key) != nil
-}
-
-// Len returns the number of items currently in the tree.
-func (t *BTree) Len() int {
-	return t.length
-}
-
-// Int implements the Item interface for integers.
-type Int int
-
-// Less returns true if int(a) < int(b).
-func (a Int) Less(b Item) bool {
-	return a < b.(Int)
-}

vendor/github.com/google/btree/btree_mem.go

@@ -1,76 +0,0 @@
-// Copyright 2014 Google Inc.
-//
-// 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 ignore
-
-// This binary compares memory usage between btree and gollrb.
-package main
-
-import (
-	"flag"
-	"fmt"
-	"math/rand"
-	"runtime"
-	"time"
-
-	"github.com/google/btree"
-	"github.com/petar/GoLLRB/llrb"
-)
-
-var (
-	size   = flag.Int("size", 1000000, "size of the tree to build")
-	degree = flag.Int("degree", 8, "degree of btree")
-	gollrb = flag.Bool("llrb", false, "use llrb instead of btree")
-)
-
-func main() {
-	flag.Parse()
-	vals := rand.Perm(*size)
-	var t, v interface{}
-	v = vals
-	var stats runtime.MemStats
-	for i := 0; i < 10; i++ {
-		runtime.GC()
-	}
-	fmt.Println("-------- BEFORE ----------")
-	runtime.ReadMemStats(&stats)
-	fmt.Printf("%+v\n", stats)
-	start := time.Now()
-	if *gollrb {
-		tr := llrb.New()
-		for _, v := range vals {
-			tr.ReplaceOrInsert(llrb.Int(v))
-		}
-		t = tr // keep it around
-	} else {
-		tr := btree.New(*degree)
-		for _, v := range vals {
-			tr.ReplaceOrInsert(btree.Int(v))
-		}
-		t = tr // keep it around
-	}
-	fmt.Printf("%v inserts in %v\n", *size, time.Since(start))
-	fmt.Println("-------- AFTER ----------")
-	runtime.ReadMemStats(&stats)
-	fmt.Printf("%+v\n", stats)
-	for i := 0; i < 10; i++ {
-		runtime.GC()
-	}
-	fmt.Println("-------- AFTER GC ----------")
-	runtime.ReadMemStats(&stats)
-	fmt.Printf("%+v\n", stats)
-	if t == v {
-		fmt.Println("to make sure vals and tree aren't GC'd")
-	}
-}

vendor/github.com/google/gofuzz/fuzz.go

@@ -34,21 +34,27 @@ type Fuzzer struct {
 	nilChance        float64
 	minElements      int
 	maxElements      int
+	maxDepth         int
 }
 
 // New returns a new Fuzzer. Customize your Fuzzer further by calling Funcs,
 // RandSource, NilChance, or NumElements in any order.
 func New() *Fuzzer {
+	return NewWithSeed(time.Now().UnixNano())
+}
+
+func NewWithSeed(seed int64) *Fuzzer {
 	f := &Fuzzer{
 		defaultFuzzFuncs: fuzzFuncMap{
 			reflect.TypeOf(&time.Time{}): reflect.ValueOf(fuzzTime),
 		},
 
 		fuzzFuncs:   fuzzFuncMap{},
-		r:           rand.New(rand.NewSource(time.Now().UnixNano())),
+		r:           rand.New(rand.NewSource(seed)),
 		nilChance:   .2,
 		minElements: 1,
 		maxElements: 10,
+		maxDepth:    100,
 	}
 	return f
 }
@@ -136,6 +142,14 @@ func (f *Fuzzer) genShouldFill() bool {
 	return f.r.Float64() > f.nilChance
 }
 
+// MaxDepth sets the maximum number of recursive fuzz calls that will be made
+// before stopping.  This includes struct members, pointers, and map and slice
+// elements.
+func (f *Fuzzer) MaxDepth(d int) *Fuzzer {
+	f.maxDepth = d
+	return f
+}
+
 // Fuzz recursively fills all of obj's fields with something random.  First
 // this tries to find a custom fuzz function (see Funcs).  If there is no
 // custom function this tests whether the object implements fuzz.Interface and,
@@ -144,17 +158,19 @@ func (f *Fuzzer) genShouldFill() bool {
 // fails, this will generate random values for all primitive fields and then
 // recurse for all non-primitives.
 //
-// Not safe for cyclic or tree-like structs!
+// This is safe for cyclic or tree-like structs, up to a limit.  Use the
+// MaxDepth method to adjust how deep you need it to recurse.
 //
-// obj must be a pointer. Only exported (public) fields can be set (thanks, golang :/ )
-// Intended for tests, so will panic on bad input or unimplemented fields.
+// obj must be a pointer. Only exported (public) fields can be set (thanks,
+// golang :/ ) Intended for tests, so will panic on bad input or unimplemented
+// fields.
 func (f *Fuzzer) Fuzz(obj interface{}) {
 	v := reflect.ValueOf(obj)
 	if v.Kind() != reflect.Ptr {
 		panic("needed ptr!")
 	}
 	v = v.Elem()
-	f.doFuzz(v, 0)
+	f.fuzzWithContext(v, 0)
 }
 
 // FuzzNoCustom is just like Fuzz, except that any custom fuzz function for
@@ -170,7 +186,7 @@ func (f *Fuzzer) FuzzNoCustom(obj interface{}) {
 		panic("needed ptr!")
 	}
 	v = v.Elem()
-	f.doFuzz(v, flagNoCustomFuzz)
+	f.fuzzWithContext(v, flagNoCustomFuzz)
 }
 
 const (
@@ -178,69 +194,87 @@ const (
 	flagNoCustomFuzz uint64 = 1 << iota
 )
 
-func (f *Fuzzer) doFuzz(v reflect.Value, flags uint64) {
+func (f *Fuzzer) fuzzWithContext(v reflect.Value, flags uint64) {
+	fc := &fuzzerContext{fuzzer: f}
+	fc.doFuzz(v, flags)
+}
+
+// fuzzerContext carries context about a single fuzzing run, which lets Fuzzer
+// be thread-safe.
+type fuzzerContext struct {
+	fuzzer   *Fuzzer
+	curDepth int
+}
+
+func (fc *fuzzerContext) doFuzz(v reflect.Value, flags uint64) {
+	if fc.curDepth >= fc.fuzzer.maxDepth {
+		return
+	}
+	fc.curDepth++
+	defer func() { fc.curDepth-- }()
+
 	if !v.CanSet() {
 		return
 	}
 
 	if flags&flagNoCustomFuzz == 0 {
 		// Check for both pointer and non-pointer custom functions.
-		if v.CanAddr() && f.tryCustom(v.Addr()) {
+		if v.CanAddr() && fc.tryCustom(v.Addr()) {
 			return
 		}
-		if f.tryCustom(v) {
+		if fc.tryCustom(v) {
 			return
 		}
 	}
 
 	if fn, ok := fillFuncMap[v.Kind()]; ok {
-		fn(v, f.r)
+		fn(v, fc.fuzzer.r)
 		return
 	}
 	switch v.Kind() {
 	case reflect.Map:
-		if f.genShouldFill() {
+		if fc.fuzzer.genShouldFill() {
 			v.Set(reflect.MakeMap(v.Type()))
-			n := f.genElementCount()
+			n := fc.fuzzer.genElementCount()
 			for i := 0; i < n; i++ {
 				key := reflect.New(v.Type().Key()).Elem()
-				f.doFuzz(key, 0)
+				fc.doFuzz(key, 0)
 				val := reflect.New(v.Type().Elem()).Elem()
-				f.doFuzz(val, 0)
+				fc.doFuzz(val, 0)
 				v.SetMapIndex(key, val)
 			}
 			return
 		}
 		v.Set(reflect.Zero(v.Type()))
 	case reflect.Ptr:
-		if f.genShouldFill() {
+		if fc.fuzzer.genShouldFill() {
 			v.Set(reflect.New(v.Type().Elem()))
-			f.doFuzz(v.Elem(), 0)
+			fc.doFuzz(v.Elem(), 0)
 			return
 		}
 		v.Set(reflect.Zero(v.Type()))
 	case reflect.Slice:
-		if f.genShouldFill() {
-			n := f.genElementCount()
+		if fc.fuzzer.genShouldFill() {
+			n := fc.fuzzer.genElementCount()
 			v.Set(reflect.MakeSlice(v.Type(), n, n))
 			for i := 0; i < n; i++ {
-				f.doFuzz(v.Index(i), 0)
+				fc.doFuzz(v.Index(i), 0)
 			}
 			return
 		}
 		v.Set(reflect.Zero(v.Type()))
 	case reflect.Array:
-		if f.genShouldFill() {
+		if fc.fuzzer.genShouldFill() {
 			n := v.Len()
 			for i := 0; i < n; i++ {
-				f.doFuzz(v.Index(i), 0)
+				fc.doFuzz(v.Index(i), 0)
 			}
 			return
 		}
 		v.Set(reflect.Zero(v.Type()))
 	case reflect.Struct:
 		for i := 0; i < v.NumField(); i++ {
-			f.doFuzz(v.Field(i), 0)
+			fc.doFuzz(v.Field(i), 0)
 		}
 	case reflect.Chan:
 		fallthrough
@@ -255,20 +289,20 @@ func (f *Fuzzer) doFuzz(v reflect.Value, flags uint64) {
 
 // tryCustom searches for custom handlers, and returns true iff it finds a match
 // and successfully randomizes v.
-func (f *Fuzzer) tryCustom(v reflect.Value) bool {
+func (fc *fuzzerContext) tryCustom(v reflect.Value) bool {
 	// First: see if we have a fuzz function for it.
-	doCustom, ok := f.fuzzFuncs[v.Type()]
+	doCustom, ok := fc.fuzzer.fuzzFuncs[v.Type()]
 	if !ok {
 		// Second: see if it can fuzz itself.
 		if v.CanInterface() {
 			intf := v.Interface()
 			if fuzzable, ok := intf.(Interface); ok {
-				fuzzable.Fuzz(Continue{f: f, Rand: f.r})
+				fuzzable.Fuzz(Continue{fc: fc, Rand: fc.fuzzer.r})
 				return true
 			}
 		}
 		// Finally: see if there is a default fuzz function.
-		doCustom, ok = f.defaultFuzzFuncs[v.Type()]
+		doCustom, ok = fc.fuzzer.defaultFuzzFuncs[v.Type()]
 		if !ok {
 			return false
 		}
@@ -294,8 +328,8 @@ func (f *Fuzzer) tryCustom(v reflect.Value) bool {
 	}
 
 	doCustom.Call([]reflect.Value{v, reflect.ValueOf(Continue{
-		f:    f,
-		Rand: f.r,
+		fc:   fc,
+		Rand: fc.fuzzer.r,
 	})})
 	return true
 }
@@ -310,7 +344,7 @@ type Interface interface {
 // Continue can be passed to custom fuzzing functions to allow them to use
 // the correct source of randomness and to continue fuzzing their members.
 type Continue struct {
-	f *Fuzzer
+	fc *fuzzerContext
 
 	// For convenience, Continue implements rand.Rand via embedding.
 	// Use this for generating any randomness if you want your fuzzing
@@ -325,7 +359,7 @@ func (c Continue) Fuzz(obj interface{}) {
 		panic("needed ptr!")
 	}
 	v = v.Elem()
-	c.f.doFuzz(v, 0)
+	c.fc.doFuzz(v, 0)
 }
 
 // FuzzNoCustom continues fuzzing obj, except that any custom fuzz function for
@@ -338,7 +372,7 @@ func (c Continue) FuzzNoCustom(obj interface{}) {
 		panic("needed ptr!")
 	}
 	v = v.Elem()
-	c.f.doFuzz(v, flagNoCustomFuzz)
+	c.fc.doFuzz(v, flagNoCustomFuzz)
 }
 
 // RandString makes a random string up to 20 characters long. The returned string

vendor/github.com/gregjones/httpcache/.travis.yml

@@ -1,18 +0,0 @@
-sudo: false
-language: go
-go:
-  - 1.6.x
-  - 1.7.x
-  - 1.8.x
-  - master
-matrix:
-  allow_failures:
-    - go: master
-  fast_finish: true
-install:
-  - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
-script:
-  - go get -t -v ./...
-  - diff -u <(echo -n) <(gofmt -d .)
-  - go tool vet .
-  - go test -v -race ./...

vendor/github.com/gregjones/httpcache/LICENSE.txt

@@ -1,7 +0,0 @@
-Copyright © 2012 Greg Jones (greg.jones@gmail.com)
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/gregjones/httpcache/README.md

@@ -1,24 +0,0 @@
-httpcache
-=========
-
-[![Build Status](https://travis-ci.org/gregjones/httpcache.svg?branch=master)](https://travis-ci.org/gregjones/httpcache) [![GoDoc](https://godoc.org/github.com/gregjones/httpcache?status.svg)](https://godoc.org/github.com/gregjones/httpcache)
-
-Package httpcache provides a http.RoundTripper implementation that works as a mostly RFC-compliant cache for http responses.
-
-It is only suitable for use as a 'private' cache (i.e. for a web-browser or an API-client and not for a shared proxy).
-
-Cache Backends
---------------
-
-- The built-in 'memory' cache stores responses in an in-memory map.
-- [`github.com/gregjones/httpcache/diskcache`](https://github.com/gregjones/httpcache/tree/master/diskcache) provides a filesystem-backed cache using the [diskv](https://github.com/peterbourgon/diskv) library.
-- [`github.com/gregjones/httpcache/memcache`](https://github.com/gregjones/httpcache/tree/master/memcache) provides memcache implementations, for both App Engine and 'normal' memcache servers.
-- [`sourcegraph.com/sourcegraph/s3cache`](https://sourcegraph.com/github.com/sourcegraph/s3cache) uses Amazon S3 for storage.
-- [`github.com/gregjones/httpcache/leveldbcache`](https://github.com/gregjones/httpcache/tree/master/leveldbcache) provides a filesystem-backed cache using [leveldb](https://github.com/syndtr/goleveldb/leveldb).
-- [`github.com/die-net/lrucache`](https://github.com/die-net/lrucache) provides an in-memory cache that will evict least-recently used entries.
-- [`github.com/die-net/lrucache/twotier`](https://github.com/die-net/lrucache/tree/master/twotier) allows caches to be combined, for example to use lrucache above with a persistent disk-cache.
-
-License
--------
-
--	[MIT License](LICENSE.txt)

vendor/github.com/gregjones/httpcache/diskcache/diskcache.go

@@ -1,61 +0,0 @@
-// Package diskcache provides an implementation of httpcache.Cache that uses the diskv package
-// to supplement an in-memory map with persistent storage
-//
-package diskcache
-
-import (
-	"bytes"
-	"crypto/md5"
-	"encoding/hex"
-	"github.com/peterbourgon/diskv"
-	"io"
-)
-
-// Cache is an implementation of httpcache.Cache that supplements the in-memory map with persistent storage
-type Cache struct {
-	d *diskv.Diskv
-}
-
-// Get returns the response corresponding to key if present
-func (c *Cache) Get(key string) (resp []byte, ok bool) {
-	key = keyToFilename(key)
-	resp, err := c.d.Read(key)
-	if err != nil {
-		return []byte{}, false
-	}
-	return resp, true
-}
-
-// Set saves a response to the cache as key
-func (c *Cache) Set(key string, resp []byte) {
-	key = keyToFilename(key)
-	c.d.WriteStream(key, bytes.NewReader(resp), true)
-}
-
-// Delete removes the response with key from the cache
-func (c *Cache) Delete(key string) {
-	key = keyToFilename(key)
-	c.d.Erase(key)
-}
-
-func keyToFilename(key string) string {
-	h := md5.New()
-	io.WriteString(h, key)
-	return hex.EncodeToString(h.Sum(nil))
-}
-
-// New returns a new Cache that will store files in basePath
-func New(basePath string) *Cache {
-	return &Cache{
-		d: diskv.New(diskv.Options{
-			BasePath:     basePath,
-			CacheSizeMax: 100 * 1024 * 1024, // 100MB
-		}),
-	}
-}
-
-// NewWithDiskv returns a new Cache using the provided Diskv as underlying
-// storage.
-func NewWithDiskv(d *diskv.Diskv) *Cache {
-	return &Cache{d}
-}

vendor/github.com/gregjones/httpcache/httpcache.go

@@ -1,553 +0,0 @@
-// Package httpcache provides a http.RoundTripper implementation that works as a
-// mostly RFC-compliant cache for http responses.
-//
-// It is only suitable for use as a 'private' cache (i.e. for a web-browser or an API-client
-// and not for a shared proxy).
-//
-package httpcache
-
-import (
-	"bufio"
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"net/http/httputil"
-	"strings"
-	"sync"
-	"time"
-)
-
-const (
-	stale = iota
-	fresh
-	transparent
-	// XFromCache is the header added to responses that are returned from the cache
-	XFromCache = "X-From-Cache"
-)
-
-// A Cache interface is used by the Transport to store and retrieve responses.
-type Cache interface {
-	// Get returns the []byte representation of a cached response and a bool
-	// set to true if the value isn't empty
-	Get(key string) (responseBytes []byte, ok bool)
-	// Set stores the []byte representation of a response against a key
-	Set(key string, responseBytes []byte)
-	// Delete removes the value associated with the key
-	Delete(key string)
-}
-
-// cacheKey returns the cache key for req.
-func cacheKey(req *http.Request) string {
-	return req.URL.String()
-}
-
-// CachedResponse returns the cached http.Response for req if present, and nil
-// otherwise.
-func CachedResponse(c Cache, req *http.Request) (resp *http.Response, err error) {
-	cachedVal, ok := c.Get(cacheKey(req))
-	if !ok {
-		return
-	}
-
-	b := bytes.NewBuffer(cachedVal)
-	return http.ReadResponse(bufio.NewReader(b), req)
-}
-
-// MemoryCache is an implemtation of Cache that stores responses in an in-memory map.
-type MemoryCache struct {
-	mu    sync.RWMutex
-	items map[string][]byte
-}
-
-// Get returns the []byte representation of the response and true if present, false if not
-func (c *MemoryCache) Get(key string) (resp []byte, ok bool) {
-	c.mu.RLock()
-	resp, ok = c.items[key]
-	c.mu.RUnlock()
-	return resp, ok
-}
-
-// Set saves response resp to the cache with key
-func (c *MemoryCache) Set(key string, resp []byte) {
-	c.mu.Lock()
-	c.items[key] = resp
-	c.mu.Unlock()
-}
-
-// Delete removes key from the cache
-func (c *MemoryCache) Delete(key string) {
-	c.mu.Lock()
-	delete(c.items, key)
-	c.mu.Unlock()
-}
-
-// NewMemoryCache returns a new Cache that will store items in an in-memory map
-func NewMemoryCache() *MemoryCache {
-	c := &MemoryCache{items: map[string][]byte{}}
-	return c
-}
-
-// Transport is an implementation of http.RoundTripper that will return values from a cache
-// where possible (avoiding a network request) and will additionally add validators (etag/if-modified-since)
-// to repeated requests allowing servers to return 304 / Not Modified
-type Transport struct {
-	// The RoundTripper interface actually used to make requests
-	// If nil, http.DefaultTransport is used
-	Transport http.RoundTripper
-	Cache     Cache
-	// If true, responses returned from the cache will be given an extra header, X-From-Cache
-	MarkCachedResponses bool
-}
-
-// NewTransport returns a new Transport with the
-// provided Cache implementation and MarkCachedResponses set to true
-func NewTransport(c Cache) *Transport {
-	return &Transport{Cache: c, MarkCachedResponses: true}
-}
-
-// Client returns an *http.Client that caches responses.
-func (t *Transport) Client() *http.Client {
-	return &http.Client{Transport: t}
-}
-
-// varyMatches will return false unless all of the cached values for the headers listed in Vary
-// match the new request
-func varyMatches(cachedResp *http.Response, req *http.Request) bool {
-	for _, header := range headerAllCommaSepValues(cachedResp.Header, "vary") {
-		header = http.CanonicalHeaderKey(header)
-		if header != "" && req.Header.Get(header) != cachedResp.Header.Get("X-Varied-"+header) {
-			return false
-		}
-	}
-	return true
-}
-
-// RoundTrip takes a Request and returns a Response
-//
-// If there is a fresh Response already in cache, then it will be returned without connecting to
-// the server.
-//
-// If there is a stale Response, then any validators it contains will be set on the new request
-// to give the server a chance to respond with NotModified. If this happens, then the cached Response
-// will be returned.
-func (t *Transport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
-	cacheKey := cacheKey(req)
-	cacheable := (req.Method == "GET" || req.Method == "HEAD") && req.Header.Get("range") == ""
-	var cachedResp *http.Response
-	if cacheable {
-		cachedResp, err = CachedResponse(t.Cache, req)
-	} else {
-		// Need to invalidate an existing value
-		t.Cache.Delete(cacheKey)
-	}
-
-	transport := t.Transport
-	if transport == nil {
-		transport = http.DefaultTransport
-	}
-
-	if cacheable && cachedResp != nil && err == nil {
-		if t.MarkCachedResponses {
-			cachedResp.Header.Set(XFromCache, "1")
-		}
-
-		if varyMatches(cachedResp, req) {
-			// Can only use cached value if the new request doesn't Vary significantly
-			freshness := getFreshness(cachedResp.Header, req.Header)
-			if freshness == fresh {
-				return cachedResp, nil
-			}
-
-			if freshness == stale {
-				var req2 *http.Request
-				// Add validators if caller hasn't already done so
-				etag := cachedResp.Header.Get("etag")
-				if etag != "" && req.Header.Get("etag") == "" {
-					req2 = cloneRequest(req)
-					req2.Header.Set("if-none-match", etag)
-				}
-				lastModified := cachedResp.Header.Get("last-modified")
-				if lastModified != "" && req.Header.Get("last-modified") == "" {
-					if req2 == nil {
-						req2 = cloneRequest(req)
-					}
-					req2.Header.Set("if-modified-since", lastModified)
-				}
-				if req2 != nil {
-					req = req2
-				}
-			}
-		}
-
-		resp, err = transport.RoundTrip(req)
-		if err == nil && req.Method == "GET" && resp.StatusCode == http.StatusNotModified {
-			// Replace the 304 response with the one from cache, but update with some new headers
-			endToEndHeaders := getEndToEndHeaders(resp.Header)
-			for _, header := range endToEndHeaders {
-				cachedResp.Header[header] = resp.Header[header]
-			}
-			cachedResp.Status = fmt.Sprintf("%d %s", http.StatusOK, http.StatusText(http.StatusOK))
-			cachedResp.StatusCode = http.StatusOK
-
-			resp = cachedResp
-		} else if (err != nil || (cachedResp != nil && resp.StatusCode >= 500)) &&
-			req.Method == "GET" && canStaleOnError(cachedResp.Header, req.Header) {
-			// In case of transport failure and stale-if-error activated, returns cached content
-			// when available
-			cachedResp.Status = fmt.Sprintf("%d %s", http.StatusOK, http.StatusText(http.StatusOK))
-			cachedResp.StatusCode = http.StatusOK
-			return cachedResp, nil
-		} else {
-			if err != nil || resp.StatusCode != http.StatusOK {
-				t.Cache.Delete(cacheKey)
-			}
-			if err != nil {
-				return nil, err
-			}
-		}
-	} else {
-		reqCacheControl := parseCacheControl(req.Header)
-		if _, ok := reqCacheControl["only-if-cached"]; ok {
-			resp = newGatewayTimeoutResponse(req)
-		} else {
-			resp, err = transport.RoundTrip(req)
-			if err != nil {
-				return nil, err
-			}
-		}
-	}
-
-	if cacheable && canStore(parseCacheControl(req.Header), parseCacheControl(resp.Header)) {
-		for _, varyKey := range headerAllCommaSepValues(resp.Header, "vary") {
-			varyKey = http.CanonicalHeaderKey(varyKey)
-			fakeHeader := "X-Varied-" + varyKey
-			reqValue := req.Header.Get(varyKey)
-			if reqValue != "" {
-				resp.Header.Set(fakeHeader, reqValue)
-			}
-		}
-		switch req.Method {
-		case "GET":
-			// Delay caching until EOF is reached.
-			resp.Body = &cachingReadCloser{
-				R: resp.Body,
-				OnEOF: func(r io.Reader) {
-					resp := *resp
-					resp.Body = ioutil.NopCloser(r)
-					respBytes, err := httputil.DumpResponse(&resp, true)
-					if err == nil {
-						t.Cache.Set(cacheKey, respBytes)
-					}
-				},
-			}
-		default:
-			respBytes, err := httputil.DumpResponse(resp, true)
-			if err == nil {
-				t.Cache.Set(cacheKey, respBytes)
-			}
-		}
-	} else {
-		t.Cache.Delete(cacheKey)
-	}
-	return resp, nil
-}
-
-// ErrNoDateHeader indicates that the HTTP headers contained no Date header.
-var ErrNoDateHeader = errors.New("no Date header")
-
-// Date parses and returns the value of the Date header.
-func Date(respHeaders http.Header) (date time.Time, err error) {
-	dateHeader := respHeaders.Get("date")
-	if dateHeader == "" {
-		err = ErrNoDateHeader
-		return
-	}
-
-	return time.Parse(time.RFC1123, dateHeader)
-}
-
-type realClock struct{}
-
-func (c *realClock) since(d time.Time) time.Duration {
-	return time.Since(d)
-}
-
-type timer interface {
-	since(d time.Time) time.Duration
-}
-
-var clock timer = &realClock{}
-
-// getFreshness will return one of fresh/stale/transparent based on the cache-control
-// values of the request and the response
-//
-// fresh indicates the response can be returned
-// stale indicates that the response needs validating before it is returned
-// transparent indicates the response should not be used to fulfil the request
-//
-// Because this is only a private cache, 'public' and 'private' in cache-control aren't
-// signficant. Similarly, smax-age isn't used.
-func getFreshness(respHeaders, reqHeaders http.Header) (freshness int) {
-	respCacheControl := parseCacheControl(respHeaders)
-	reqCacheControl := parseCacheControl(reqHeaders)
-	if _, ok := reqCacheControl["no-cache"]; ok {
-		return transparent
-	}
-	if _, ok := respCacheControl["no-cache"]; ok {
-		return stale
-	}
-	if _, ok := reqCacheControl["only-if-cached"]; ok {
-		return fresh
-	}
-
-	date, err := Date(respHeaders)
-	if err != nil {
-		return stale
-	}
-	currentAge := clock.since(date)
-
-	var lifetime time.Duration
-	var zeroDuration time.Duration
-
-	// If a response includes both an Expires header and a max-age directive,
-	// the max-age directive overrides the Expires header, even if the Expires header is more restrictive.
-	if maxAge, ok := respCacheControl["max-age"]; ok {
-		lifetime, err = time.ParseDuration(maxAge + "s")
-		if err != nil {
-			lifetime = zeroDuration
-		}
-	} else {
-		expiresHeader := respHeaders.Get("Expires")
-		if expiresHeader != "" {
-			expires, err := time.Parse(time.RFC1123, expiresHeader)
-			if err != nil {
-				lifetime = zeroDuration
-			} else {
-				lifetime = expires.Sub(date)
-			}
-		}
-	}
-
-	if maxAge, ok := reqCacheControl["max-age"]; ok {
-		// the client is willing to accept a response whose age is no greater than the specified time in seconds
-		lifetime, err = time.ParseDuration(maxAge + "s")
-		if err != nil {
-			lifetime = zeroDuration
-		}
-	}
-	if minfresh, ok := reqCacheControl["min-fresh"]; ok {
-		//  the client wants a response that will still be fresh for at least the specified number of seconds.
-		minfreshDuration, err := time.ParseDuration(minfresh + "s")
-		if err == nil {
-			currentAge = time.Duration(currentAge + minfreshDuration)
-		}
-	}
-
-	if maxstale, ok := reqCacheControl["max-stale"]; ok {
-		// Indicates that the client is willing to accept a response that has exceeded its expiration time.
-		// If max-stale is assigned a value, then the client is willing to accept a response that has exceeded
-		// its expiration time by no more than the specified number of seconds.
-		// If no value is assigned to max-stale, then the client is willing to accept a stale response of any age.
-		//
-		// Responses served only because of a max-stale value are supposed to have a Warning header added to them,
-		// but that seems like a  hassle, and is it actually useful? If so, then there needs to be a different
-		// return-value available here.
-		if maxstale == "" {
-			return fresh
-		}
-		maxstaleDuration, err := time.ParseDuration(maxstale + "s")
-		if err == nil {
-			currentAge = time.Duration(currentAge - maxstaleDuration)
-		}
-	}
-
-	if lifetime > currentAge {
-		return fresh
-	}
-
-	return stale
-}
-
-// Returns true if either the request or the response includes the stale-if-error
-// cache control extension: https://tools.ietf.org/html/rfc5861
-func canStaleOnError(respHeaders, reqHeaders http.Header) bool {
-	respCacheControl := parseCacheControl(respHeaders)
-	reqCacheControl := parseCacheControl(reqHeaders)
-
-	var err error
-	lifetime := time.Duration(-1)
-
-	if staleMaxAge, ok := respCacheControl["stale-if-error"]; ok {
-		if staleMaxAge != "" {
-			lifetime, err = time.ParseDuration(staleMaxAge + "s")
-			if err != nil {
-				return false
-			}
-		} else {
-			return true
-		}
-	}
-	if staleMaxAge, ok := reqCacheControl["stale-if-error"]; ok {
-		if staleMaxAge != "" {
-			lifetime, err = time.ParseDuration(staleMaxAge + "s")
-			if err != nil {
-				return false
-			}
-		} else {
-			return true
-		}
-	}
-
-	if lifetime >= 0 {
-		date, err := Date(respHeaders)
-		if err != nil {
-			return false
-		}
-		currentAge := clock.since(date)
-		if lifetime > currentAge {
-			return true
-		}
-	}
-
-	return false
-}
-
-func getEndToEndHeaders(respHeaders http.Header) []string {
-	// These headers are always hop-by-hop
-	hopByHopHeaders := map[string]struct{}{
-		"Connection":          struct{}{},
-		"Keep-Alive":          struct{}{},
-		"Proxy-Authenticate":  struct{}{},
-		"Proxy-Authorization": struct{}{},
-		"Te":                struct{}{},
-		"Trailers":          struct{}{},
-		"Transfer-Encoding": struct{}{},
-		"Upgrade":           struct{}{},
-	}
-
-	for _, extra := range strings.Split(respHeaders.Get("connection"), ",") {
-		// any header listed in connection, if present, is also considered hop-by-hop
-		if strings.Trim(extra, " ") != "" {
-			hopByHopHeaders[http.CanonicalHeaderKey(extra)] = struct{}{}
-		}
-	}
-	endToEndHeaders := []string{}
-	for respHeader, _ := range respHeaders {
-		if _, ok := hopByHopHeaders[respHeader]; !ok {
-			endToEndHeaders = append(endToEndHeaders, respHeader)
-		}
-	}
-	return endToEndHeaders
-}
-
-func canStore(reqCacheControl, respCacheControl cacheControl) (canStore bool) {
-	if _, ok := respCacheControl["no-store"]; ok {
-		return false
-	}
-	if _, ok := reqCacheControl["no-store"]; ok {
-		return false
-	}
-	return true
-}
-
-func newGatewayTimeoutResponse(req *http.Request) *http.Response {
-	var braw bytes.Buffer
-	braw.WriteString("HTTP/1.1 504 Gateway Timeout\r\n\r\n")
-	resp, err := http.ReadResponse(bufio.NewReader(&braw), req)
-	if err != nil {
-		panic(err)
-	}
-	return resp
-}
-
-// cloneRequest returns a clone of the provided *http.Request.
-// The clone is a shallow copy of the struct and its Header map.
-// (This function copyright goauth2 authors: https://code.google.com/p/goauth2)
-func cloneRequest(r *http.Request) *http.Request {
-	// shallow copy of the struct
-	r2 := new(http.Request)
-	*r2 = *r
-	// deep copy of the Header
-	r2.Header = make(http.Header)
-	for k, s := range r.Header {
-		r2.Header[k] = s
-	}
-	return r2
-}
-
-type cacheControl map[string]string
-
-func parseCacheControl(headers http.Header) cacheControl {
-	cc := cacheControl{}
-	ccHeader := headers.Get("Cache-Control")
-	for _, part := range strings.Split(ccHeader, ",") {
-		part = strings.Trim(part, " ")
-		if part == "" {
-			continue
-		}
-		if strings.ContainsRune(part, '=') {
-			keyval := strings.Split(part, "=")
-			cc[strings.Trim(keyval[0], " ")] = strings.Trim(keyval[1], ",")
-		} else {
-			cc[part] = ""
-		}
-	}
-	return cc
-}
-
-// headerAllCommaSepValues returns all comma-separated values (each
-// with whitespace trimmed) for header name in headers. According to
-// Section 4.2 of the HTTP/1.1 spec
-// (http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2),
-// values from multiple occurrences of a header should be concatenated, if
-// the header's value is a comma-separated list.
-func headerAllCommaSepValues(headers http.Header, name string) []string {
-	var vals []string
-	for _, val := range headers[http.CanonicalHeaderKey(name)] {
-		fields := strings.Split(val, ",")
-		for i, f := range fields {
-			fields[i] = strings.TrimSpace(f)
-		}
-		vals = append(vals, fields...)
-	}
-	return vals
-}
-
-// cachingReadCloser is a wrapper around ReadCloser R that calls OnEOF
-// handler with a full copy of the content read from R when EOF is
-// reached.
-type cachingReadCloser struct {
-	// Underlying ReadCloser.
-	R io.ReadCloser
-	// OnEOF is called with a copy of the content of R when EOF is reached.
-	OnEOF func(io.Reader)
-
-	buf bytes.Buffer // buf stores a copy of the content of R.
-}
-
-// Read reads the next len(p) bytes from R or until R is drained. The
-// return value n is the number of bytes read. If R has no data to
-// return, err is io.EOF and OnEOF is called with a full copy of what
-// has been read so far.
-func (r *cachingReadCloser) Read(p []byte) (n int, err error) {
-	n, err = r.R.Read(p)
-	r.buf.Write(p[:n])
-	if err == io.EOF {
-		r.OnEOF(bytes.NewReader(r.buf.Bytes()))
-	}
-	return n, err
-}
-
-func (r *cachingReadCloser) Close() error {
-	return r.R.Close()
-}
-
-// NewMemoryCacheTransport returns a new Transport using the in-memory cache implementation
-func NewMemoryCacheTransport() *Transport {
-	c := NewMemoryCache()
-	t := NewTransport(c)
-	return t
-}

vendor/github.com/hashicorp/golang-lru/2q.go

@@ -30,9 +30,9 @@ type TwoQueueCache struct {
 	size       int
 	recentSize int
 
-	recent      *simplelru.LRU
-	frequent    *simplelru.LRU
-	recentEvict *simplelru.LRU
+	recent      simplelru.LRUCache
+	frequent    simplelru.LRUCache
+	recentEvict simplelru.LRUCache
 	lock        sync.RWMutex
 }
 
@@ -84,7 +84,8 @@ func New2QParams(size int, recentRatio float64, ghostRatio float64) (*TwoQueueCa
 	return c, nil
 }
 
-func (c *TwoQueueCache) Get(key interface{}) (interface{}, bool) {
+// Get looks up a key's value from the cache.
+func (c *TwoQueueCache) Get(key interface{}) (value interface{}, ok bool) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 
@@ -105,6 +106,7 @@ func (c *TwoQueueCache) Get(key interface{}) (interface{}, bool) {
 	return nil, false
 }
 
+// Add adds a value to the cache.
 func (c *TwoQueueCache) Add(key, value interface{}) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
@@ -160,12 +162,15 @@ func (c *TwoQueueCache) ensureSpace(recentEvict bool) {
 	c.frequent.RemoveOldest()
 }
 
+// Len returns the number of items in the cache.
 func (c *TwoQueueCache) Len() int {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	return c.recent.Len() + c.frequent.Len()
 }
 
+// Keys returns a slice of the keys in the cache.
+// The frequently used keys are first in the returned slice.
 func (c *TwoQueueCache) Keys() []interface{} {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
@@ -174,6 +179,7 @@ func (c *TwoQueueCache) Keys() []interface{} {
 	return append(k1, k2...)
 }
 
+// Remove removes the provided key from the cache.
 func (c *TwoQueueCache) Remove(key interface{}) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
@@ -188,6 +194,7 @@ func (c *TwoQueueCache) Remove(key interface{}) {
 	}
 }
 
+// Purge is used to completely clear the cache.
 func (c *TwoQueueCache) Purge() {
 	c.lock.Lock()
 	defer c.lock.Unlock()
@@ -196,13 +203,17 @@ func (c *TwoQueueCache) Purge() {
 	c.recentEvict.Purge()
 }
 
+// Contains is used to check if the cache contains a key
+// without updating recency or frequency.
 func (c *TwoQueueCache) Contains(key interface{}) bool {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	return c.frequent.Contains(key) || c.recent.Contains(key)
 }
 
-func (c *TwoQueueCache) Peek(key interface{}) (interface{}, bool) {
+// Peek is used to inspect the cache value of a key
+// without updating recency or frequency.
+func (c *TwoQueueCache) Peek(key interface{}) (value interface{}, ok bool) {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	if val, ok := c.frequent.Peek(key); ok {

vendor/github.com/hashicorp/golang-lru/arc.go

@@ -18,11 +18,11 @@ type ARCCache struct {
 	size int // Size is the total capacity of the cache
 	p    int // P is the dynamic preference towards T1 or T2
 
-	t1 *simplelru.LRU // T1 is the LRU for recently accessed items
-	b1 *simplelru.LRU // B1 is the LRU for evictions from t1
+	t1 simplelru.LRUCache // T1 is the LRU for recently accessed items
+	b1 simplelru.LRUCache // B1 is the LRU for evictions from t1
 
-	t2 *simplelru.LRU // T2 is the LRU for frequently accessed items
-	b2 *simplelru.LRU // B2 is the LRU for evictions from t2
+	t2 simplelru.LRUCache // T2 is the LRU for frequently accessed items
+	b2 simplelru.LRUCache // B2 is the LRU for evictions from t2
 
 	lock sync.RWMutex
 }
@@ -60,11 +60,11 @@ func NewARC(size int) (*ARCCache, error) {
 }
 
 // Get looks up a key's value from the cache.
-func (c *ARCCache) Get(key interface{}) (interface{}, bool) {
+func (c *ARCCache) Get(key interface{}) (value interface{}, ok bool) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 
-	// Ff the value is contained in T1 (recent), then
+	// If the value is contained in T1 (recent), then
 	// promote it to T2 (frequent)
 	if val, ok := c.t1.Peek(key); ok {
 		c.t1.Remove(key)
@@ -153,7 +153,7 @@ func (c *ARCCache) Add(key, value interface{}) {
 		// Remove from B2
 		c.b2.Remove(key)
 
-		// Add the key to the frequntly used list
+		// Add the key to the frequently used list
 		c.t2.Add(key, value)
 		return
 	}
@@ -247,7 +247,7 @@ func (c *ARCCache) Contains(key interface{}) bool {
 
 // Peek is used to inspect the cache value of a key
 // without updating recency or frequency.
-func (c *ARCCache) Peek(key interface{}) (interface{}, bool) {
+func (c *ARCCache) Peek(key interface{}) (value interface{}, ok bool) {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	if val, ok := c.t1.Peek(key); ok {

vendor/github.com/hashicorp/golang-lru/doc.go

@@ -0,0 +1,21 @@
+// Package lru provides three different LRU caches of varying sophistication.
+//
+// Cache is a simple LRU cache. It is based on the
+// LRU implementation in groupcache:
+// https://github.com/golang/groupcache/tree/master/lru
+//
+// TwoQueueCache tracks frequently used and recently used entries separately.
+// This avoids a burst of accesses from taking out frequently used entries,
+// at the cost of about 2x computational overhead and some extra bookkeeping.
+//
+// ARCCache is an adaptive replacement cache. It tracks recent evictions as
+// well as recent usage in both the frequent and recent caches. Its
+// computational overhead is comparable to TwoQueueCache, but the memory
+// overhead is linear with the size of the cache.
+//
+// ARC has been patented by IBM, so do not use it if that is problematic for
+// your program.
+//
+// All caches in this package take locks while operating, and are therefore
+// thread-safe for consumers.
+package lru

vendor/github.com/hashicorp/golang-lru/go.mod

@@ -0,0 +1 @@
+module github.com/hashicorp/golang-lru

vendor/github.com/hashicorp/golang-lru/lru.go

@@ -1,6 +1,3 @@
-// This package provides a simple LRU cache. It is based on the
-// LRU implementation in groupcache:
-// https://github.com/golang/groupcache/tree/master/lru
 package lru
 
 import (
@@ -11,11 +8,11 @@ import (
 
 // Cache is a thread-safe fixed size LRU cache.
 type Cache struct {
-	lru  *simplelru.LRU
+	lru  simplelru.LRUCache
 	lock sync.RWMutex
 }
 
-// New creates an LRU of the given size
+// New creates an LRU of the given size.
 func New(size int) (*Cache, error) {
 	return NewWithEvict(size, nil)
 }
@@ -33,7 +30,7 @@ func NewWithEvict(size int, onEvicted func(key interface{}, value interface{}))
 	return c, nil
 }
 
-// Purge is used to completely clear the cache
+// Purge is used to completely clear the cache.
 func (c *Cache) Purge() {
 	c.lock.Lock()
 	c.lru.Purge()
@@ -41,30 +38,30 @@ func (c *Cache) Purge() {
 }
 
 // Add adds a value to the cache.  Returns true if an eviction occurred.
-func (c *Cache) Add(key, value interface{}) bool {
+func (c *Cache) Add(key, value interface{}) (evicted bool) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 	return c.lru.Add(key, value)
 }
 
 // Get looks up a key's value from the cache.
-func (c *Cache) Get(key interface{}) (interface{}, bool) {
+func (c *Cache) Get(key interface{}) (value interface{}, ok bool) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 	return c.lru.Get(key)
 }
 
-// Check if a key is in the cache, without updating the recent-ness
-// or deleting it for being stale.
+// Contains checks if a key is in the cache, without updating the
+// recent-ness or deleting it for being stale.
 func (c *Cache) Contains(key interface{}) bool {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	return c.lru.Contains(key)
 }
 
-// Returns the key value (or undefined if not found) without updating
+// Peek returns the key value (or undefined if not found) without updating
 // the "recently used"-ness of the key.
-func (c *Cache) Peek(key interface{}) (interface{}, bool) {
+func (c *Cache) Peek(key interface{}) (value interface{}, ok bool) {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	return c.lru.Peek(key)
@@ -73,16 +70,15 @@ func (c *Cache) Peek(key interface{}) (interface{}, bool) {
 // ContainsOrAdd checks if a key is in the cache  without updating the
 // recent-ness or deleting it for being stale,  and if not, adds the value.
 // Returns whether found and whether an eviction occurred.
-func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evict bool) {
+func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evicted bool) {
 	c.lock.Lock()
 	defer c.lock.Unlock()
 
 	if c.lru.Contains(key) {
 		return true, false
-	} else {
-		evict := c.lru.Add(key, value)
-		return false, evict
 	}
+	evicted = c.lru.Add(key, value)
+	return false, evicted
 }
 
 // Remove removes the provided key from the cache.

vendor/github.com/hashicorp/golang-lru/simplelru/lru.go

@@ -36,7 +36,7 @@ func NewLRU(size int, onEvict EvictCallback) (*LRU, error) {
 	return c, nil
 }
 
-// Purge is used to completely clear the cache
+// Purge is used to completely clear the cache.
 func (c *LRU) Purge() {
 	for k, v := range c.items {
 		if c.onEvict != nil {
@@ -47,8 +47,8 @@ func (c *LRU) Purge() {
 	c.evictList.Init()
 }
 
-// Add adds a value to the cache.  Returns true if an eviction occured.
-func (c *LRU) Add(key, value interface{}) bool {
+// Add adds a value to the cache.  Returns true if an eviction occurred.
+func (c *LRU) Add(key, value interface{}) (evicted bool) {
 	// Check for existing item
 	if ent, ok := c.items[key]; ok {
 		c.evictList.MoveToFront(ent)
@@ -78,17 +78,18 @@ func (c *LRU) Get(key interface{}) (value interface{}, ok bool) {
 	return
 }
 
-// Check if a key is in the cache, without updating the recent-ness
+// Contains checks if a key is in the cache, without updating the recent-ness
 // or deleting it for being stale.
 func (c *LRU) Contains(key interface{}) (ok bool) {
 	_, ok = c.items[key]
 	return ok
 }
 
-// Returns the key value (or undefined if not found) without updating
+// Peek returns the key value (or undefined if not found) without updating
 // the "recently used"-ness of the key.
 func (c *LRU) Peek(key interface{}) (value interface{}, ok bool) {
-	if ent, ok := c.items[key]; ok {
+	var ent *list.Element
+	if ent, ok = c.items[key]; ok {
 		return ent.Value.(*entry).value, true
 	}
 	return nil, ok
@@ -96,7 +97,7 @@ func (c *LRU) Peek(key interface{}) (value interface{}, ok bool) {
 
 // Remove removes the provided key from the cache, returning if the
 // key was contained.
-func (c *LRU) Remove(key interface{}) bool {
+func (c *LRU) Remove(key interface{}) (present bool) {
 	if ent, ok := c.items[key]; ok {
 		c.removeElement(ent)
 		return true
@@ -105,7 +106,7 @@ func (c *LRU) Remove(key interface{}) bool {
 }
 
 // RemoveOldest removes the oldest item from the cache.
-func (c *LRU) RemoveOldest() (interface{}, interface{}, bool) {
+func (c *LRU) RemoveOldest() (key interface{}, value interface{}, ok bool) {
 	ent := c.evictList.Back()
 	if ent != nil {
 		c.removeElement(ent)
@@ -116,7 +117,7 @@ func (c *LRU) RemoveOldest() (interface{}, interface{}, bool) {
 }
 
 // GetOldest returns the oldest entry
-func (c *LRU) GetOldest() (interface{}, interface{}, bool) {
+func (c *LRU) GetOldest() (key interface{}, value interface{}, ok bool) {
 	ent := c.evictList.Back()
 	if ent != nil {
 		kv := ent.Value.(*entry)

vendor/github.com/hashicorp/golang-lru/simplelru/lru_interface.go

@@ -0,0 +1,36 @@
+package simplelru
+
+// LRUCache is the interface for simple LRU cache.
+type LRUCache interface {
+	// Adds a value to the cache, returns true if an eviction occurred and
+	// updates the "recently used"-ness of the key.
+	Add(key, value interface{}) bool
+
+	// Returns key's value from the cache and
+	// updates the "recently used"-ness of the key. #value, isFound
+	Get(key interface{}) (value interface{}, ok bool)
+
+	// Check if a key exsists in cache without updating the recent-ness.
+	Contains(key interface{}) (ok bool)
+
+	// Returns key's value without updating the "recently used"-ness of the key.
+	Peek(key interface{}) (value interface{}, ok bool)
+
+	// Removes a key from the cache.
+	Remove(key interface{}) bool
+
+	// Removes the oldest entry from cache.
+	RemoveOldest() (interface{}, interface{}, bool)
+
+	// Returns the oldest entry from the cache. #key, value, isFound
+	GetOldest() (interface{}, interface{}, bool)
+
+	// Returns a slice of the keys in the cache, from oldest to newest.
+	Keys() []interface{}
+
+	// Returns the number of items in the cache.
+	Len() int
+
+	// Clear all cache entries
+	Purge()
+}

vendor/github.com/imdario/mergo/.gitignore

@@ -0,0 +1,33 @@
+#### joe made this: http://goel.io/joe
+
+#### go ####
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/
+
+#### vim ####
+# Swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+
+# Temporary
+.netrwhist
+*~
+# Auto-generated tag files
+tags

vendor/github.com/imdario/mergo/.travis.yml

@@ -1,2 +1,7 @@
 language: go
-install: go get -t
+install:
+  - go get -t
+  - go get golang.org/x/tools/cmd/cover
+  - go get github.com/mattn/goveralls
+script:
+  - $HOME/gopath/bin/goveralls -service=travis-ci -repotoken $COVERALLS_TOKEN

vendor/github.com/imdario/mergo/CODE_OF_CONDUCT.md

@@ -0,0 +1,46 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at i@dario.im. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

vendor/github.com/imdario/mergo/README.md

@@ -2,14 +2,72 @@
 
 A helper to merge structs and maps in Golang. Useful for configuration default values, avoiding messy if-statements.
 
-Also a lovely [comune](http://en.wikipedia.org/wiki/Mergo) (municipality) in the Province of Ancona in the Italian region Marche.
-
-![Mergo dall'alto](http://www.comune.mergo.an.it/Siti/Mergo/Immagini/Foto/mergo_dall_alto.jpg)
+Also a lovely [comune](http://en.wikipedia.org/wiki/Mergo) (municipality) in the Province of Ancona in the Italian region of Marche.
 
 ## Status
 
-It is ready for production use. It works fine although it may use more of testing. Here some projects in the wild using Mergo:
+It is ready for production use. [It is used in several projects by Docker, Google, The Linux Foundation, VMWare, Shopify, etc](https://github.com/imdario/mergo#mergo-in-the-wild).
 
+[![GoDoc][3]][4]
+[![GoCard][5]][6]
+[![Build Status][1]][2]
+[![Coverage Status][7]][8]
+[![Sourcegraph][9]][10]
+
+[1]: https://travis-ci.org/imdario/mergo.png
+[2]: https://travis-ci.org/imdario/mergo
+[3]: https://godoc.org/github.com/imdario/mergo?status.svg
+[4]: https://godoc.org/github.com/imdario/mergo
+[5]: https://goreportcard.com/badge/imdario/mergo
+[6]: https://goreportcard.com/report/github.com/imdario/mergo
+[7]: https://coveralls.io/repos/github/imdario/mergo/badge.svg?branch=master
+[8]: https://coveralls.io/github/imdario/mergo?branch=master
+[9]: https://sourcegraph.com/github.com/imdario/mergo/-/badge.svg
+[10]: https://sourcegraph.com/github.com/imdario/mergo?badge
+
+### Latest release
+
+[Release v0.3.4](https://github.com/imdario/mergo/releases/tag/v0.3.4).
+
+### Important note
+
+Please keep in mind that in [0.3.2](//github.com/imdario/mergo/releases/tag/0.3.2) Mergo changed `Merge()`and `Map()` signatures to support [transformers](#transformers). An optional/variadic argument has been added, so it won't break existing code.
+
+If you were using Mergo **before** April 6th 2015, please check your project works as intended after updating your local copy with ```go get -u github.com/imdario/mergo```. I apologize for any issue caused by its previous behavior and any future bug that Mergo could cause (I hope it won't!) in existing projects after the change (release 0.2.0).
+
+### Donations
+
+If Mergo is useful to you, consider buying me a coffee, a beer or making a monthly donation so I can keep building great free software. :heart_eyes:
+
+<a href='https://ko-fi.com/B0B58839' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://az743702.vo.msecnd.net/cdn/kofi1.png?v=0' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a>
+[![Beerpay](https://beerpay.io/imdario/mergo/badge.svg)](https://beerpay.io/imdario/mergo)
+[![Beerpay](https://beerpay.io/imdario/mergo/make-wish.svg)](https://beerpay.io/imdario/mergo)
+<a href="https://liberapay.com/dario/donate"><img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg"></a>
+
+### Mergo in the wild
+
+- [moby/moby](https://github.com/moby/moby)
+- [kubernetes/kubernetes](https://github.com/kubernetes/kubernetes)
+- [vmware/dispatch](https://github.com/vmware/dispatch)
+- [Shopify/themekit](https://github.com/Shopify/themekit)
+- [imdario/zas](https://github.com/imdario/zas)
+- [matcornic/hermes](https://github.com/matcornic/hermes)
+- [OpenBazaar/openbazaar-go](https://github.com/OpenBazaar/openbazaar-go)
+- [kataras/iris](https://github.com/kataras/iris)
+- [michaelsauter/crane](https://github.com/michaelsauter/crane)
+- [go-task/task](https://github.com/go-task/task)
+- [sensu/uchiwa](https://github.com/sensu/uchiwa)
+- [ory/hydra](https://github.com/ory/hydra)
+- [sisatech/vcli](https://github.com/sisatech/vcli)
+- [dairycart/dairycart](https://github.com/dairycart/dairycart)
+- [projectcalico/felix](https://github.com/projectcalico/felix)
+- [resin-os/balena](https://github.com/resin-os/balena)
+- [go-kivik/kivik](https://github.com/go-kivik/kivik)
+- [Telefonica/govice](https://github.com/Telefonica/govice)
+- [supergiant/supergiant](supergiant/supergiant)
+- [SergeyTsalkov/brooce](https://github.com/SergeyTsalkov/brooce)
+- [soniah/dnsmadeeasy](https://github.com/soniah/dnsmadeeasy)
+- [ohsu-comp-bio/funnel](https://github.com/ohsu-comp-bio/funnel)
 - [EagerIO/Stout](https://github.com/EagerIO/Stout)
 - [lynndylanhurley/defsynth-api](https://github.com/lynndylanhurley/defsynth-api)
 - [russross/canvasassignments](https://github.com/russross/canvasassignments)
@@ -17,12 +75,17 @@ It is ready for production use. It works fine although it may use more of testin
 - [casualjim/exeggutor](https://github.com/casualjim/exeggutor)
 - [divshot/gitling](https://github.com/divshot/gitling)
 - [RWJMurphy/gorl](https://github.com/RWJMurphy/gorl)
-
-[![Build Status][1]][2]
-[![GoDoc](https://godoc.org/github.com/imdario/mergo?status.svg)](https://godoc.org/github.com/imdario/mergo)
-
-[1]: https://travis-ci.org/imdario/mergo.png
-[2]: https://travis-ci.org/imdario/mergo
+- [andrerocker/deploy42](https://github.com/andrerocker/deploy42)
+- [elwinar/rambler](https://github.com/elwinar/rambler)
+- [tmaiaroto/gopartman](https://github.com/tmaiaroto/gopartman)
+- [jfbus/impressionist](https://github.com/jfbus/impressionist)
+- [Jmeyering/zealot](https://github.com/Jmeyering/zealot)
+- [godep-migrator/rigger-host](https://github.com/godep-migrator/rigger-host)
+- [Dronevery/MultiwaySwitch-Go](https://github.com/Dronevery/MultiwaySwitch-Go)
+- [thoas/picfit](https://github.com/thoas/picfit)
+- [mantasmatelis/whooplist-server](https://github.com/mantasmatelis/whooplist-server)
+- [jnuthong/item_search](https://github.com/jnuthong/item_search)
+- [bukalapak/snowboard](https://github.com/bukalapak/snowboard)
 
 ## Installation
 
@@ -35,25 +98,116 @@ It is ready for production use. It works fine although it may use more of testin
 
 ## Usage
 
-You can only merge same-type structs with exported fields initialized as zero value of their type and same-types maps. Mergo won't merge unexported (private) fields but will do recursively any exported one. Also maps will be merged recursively except for structs inside maps (because they are not addressable using Go reflection).
+You can only merge same-type structs with exported fields initialized as zero value of their type and same-types maps. Mergo won't merge unexported (private) fields but will do recursively any exported one. It won't merge empty structs value as [they are not considered zero values](https://golang.org/ref/spec#The_zero_value) either. Also maps will be merged recursively except for structs inside maps (because they are not addressable using Go reflection).
 
-    if err := mergo.Merge(&dst, src); err != nil {
-        // ...
-    }
+```go
+if err := mergo.Merge(&dst, src); err != nil {
+    // ...
+}
+```
 
-Additionally, you can map a map[string]interface{} to a struct (and otherwise, from struct to map), following the same restrictions as in Merge(). Keys are capitalized to find each corresponding exported field.
+Also, you can merge overwriting values using the transformer `WithOverride`.
 
-    if err := mergo.Map(&dst, srcMap); err != nil {
-        // ...
-    }
+```go
+if err := mergo.Merge(&dst, src, mergo.WithOverride); err != nil {
+    // ...
+}
+```
 
-Warning: if you map a struct to map, it won't do it recursively. Don't expect Mergo to map struct members of your struct as map[string]interface{}. They will be just assigned as values.
+Additionally, you can map a `map[string]interface{}` to a struct (and otherwise, from struct to map), following the same restrictions as in `Merge()`. Keys are capitalized to find each corresponding exported field.
+
+```go
+if err := mergo.Map(&dst, srcMap); err != nil {
+    // ...
+}
+```
+
+Warning: if you map a struct to map, it won't do it recursively. Don't expect Mergo to map struct members of your struct as `map[string]interface{}`. They will be just assigned as values.
 
 More information and examples in [godoc documentation](http://godoc.org/github.com/imdario/mergo).
 
+### Nice example
+
+```go
+package main
+
+import (
+	"fmt"
+	"github.com/imdario/mergo"
+)
+
+type Foo struct {
+	A string
+	B int64
+}
+
+func main() {
+	src := Foo{
+		A: "one",
+		B: 2,
+	}
+	dest := Foo{
+		A: "two",
+	}
+	mergo.Merge(&dest, src)
+	fmt.Println(dest)
+	// Will print
+	// {two 2}
+}
+```
+
 Note: if test are failing due missing package, please execute:
 
-    go get gopkg.in/yaml.v1
+    go get gopkg.in/yaml.v2
+
+### Transformers
+
+Transformers allow to merge specific types differently than in the default behavior. In other words, now you can customize how some types are merged. For example, `time.Time` is a struct; it doesn't have zero value but IsZero can return true because it has fields with zero value. How can we merge a non-zero `time.Time`?
+
+```go
+package main
+
+import (
+	"fmt"
+	"github.com/imdario/mergo"
+        "reflect"
+        "time"
+)
+
+type timeTransfomer struct {
+}
+
+func (t timeTransfomer) Transformer(typ reflect.Type) func(dst, src reflect.Value) error {
+	if typ == reflect.TypeOf(time.Time{}) {
+		return func(dst, src reflect.Value) error {
+			if dst.CanSet() {
+				isZero := dst.MethodByName("IsZero")
+				result := isZero.Call([]reflect.Value{})
+				if result[0].Bool() {
+					dst.Set(src)
+				}
+			}
+			return nil
+		}
+	}
+	return nil
+}
+
+type Snapshot struct {
+	Time time.Time
+	// ...
+}
+
+func main() {
+	src := Snapshot{time.Now()}
+	dest := Snapshot{}
+	mergo.Merge(&dest, src, mergo.WithTransformers(timeTransfomer{}))
+	fmt.Println(dest)
+	// Will print
+	// { 2018-01-12 01:15:00 +0000 UTC m=+0.000000001 }
+}
+```
+
 
 ## Contact me
 

vendor/github.com/imdario/mergo/map.go

@@ -31,7 +31,8 @@ func isExported(field reflect.StructField) bool {
 // Traverses recursively both values, assigning src's fields values to dst.
 // The map argument tracks comparisons that have already been seen, which allows
 // short circuiting on recursive types.
-func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int) (err error) {
+func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) {
+	overwrite := config.Overwrite
 	if dst.CanAddr() {
 		addr := dst.UnsafeAddr()
 		h := 17 * addr
@@ -57,10 +58,17 @@ func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int) (err
 			}
 			fieldName := field.Name
 			fieldName = changeInitialCase(fieldName, unicode.ToLower)
-			if v, ok := dstMap[fieldName]; !ok || isEmptyValue(reflect.ValueOf(v)) {
+			if v, ok := dstMap[fieldName]; !ok || (isEmptyValue(reflect.ValueOf(v)) || overwrite) {
 				dstMap[fieldName] = src.Field(i).Interface()
 			}
 		}
+	case reflect.Ptr:
+		if dst.IsNil() {
+			v := reflect.New(dst.Type().Elem())
+			dst.Set(v)
+		}
+		dst = dst.Elem()
+		fallthrough
 	case reflect.Struct:
 		srcMap := src.Interface().(map[string]interface{})
 		for key := range srcMap {
@@ -85,21 +93,24 @@ func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int) (err
 					srcKind = reflect.Ptr
 				}
 			}
+
 			if !srcElement.IsValid() {
 				continue
 			}
 			if srcKind == dstKind {
-				if err = deepMerge(dstElement, srcElement, visited, depth+1); err != nil {
+				if err = deepMerge(dstElement, srcElement, visited, depth+1, config); err != nil {
+					return
+				}
+			} else if dstKind == reflect.Interface && dstElement.Kind() == reflect.Interface {
+				if err = deepMerge(dstElement, srcElement, visited, depth+1, config); err != nil {
+					return
+				}
+			} else if srcKind == reflect.Map {
+				if err = deepMap(dstElement, srcElement, visited, depth+1, config); err != nil {
 					return
 				}
 			} else {
-				if srcKind == reflect.Map {
-					if err = deepMap(dstElement, srcElement, visited, depth+1); err != nil {
-						return
-					}
-				} else {
-					return fmt.Errorf("type mismatch on %s field: found %v, expected %v", fieldName, srcKind, dstKind)
-				}
+				return fmt.Errorf("type mismatch on %s field: found %v, expected %v", fieldName, srcKind, dstKind)
 			}
 		}
 	}
@@ -117,18 +128,35 @@ func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int) (err
 // doesn't apply if dst is a map.
 // This is separated method from Merge because it is cleaner and it keeps sane
 // semantics: merging equal types, mapping different (restricted) types.
-func Map(dst, src interface{}) error {
+func Map(dst, src interface{}, opts ...func(*Config)) error {
+	return _map(dst, src, opts...)
+}
+
+// MapWithOverwrite will do the same as Map except that non-empty dst attributes will be overridden by
+// non-empty src attribute values.
+// Deprecated: Use Map(…) with WithOverride
+func MapWithOverwrite(dst, src interface{}, opts ...func(*Config)) error {
+	return _map(dst, src, append(opts, WithOverride)...)
+}
+
+func _map(dst, src interface{}, opts ...func(*Config)) error {
 	var (
 		vDst, vSrc reflect.Value
 		err        error
 	)
+	config := &Config{}
+
+	for _, opt := range opts {
+		opt(config)
+	}
+
 	if vDst, vSrc, err = resolveValues(dst, src); err != nil {
 		return err
 	}
 	// To be friction-less, we redirect equal-type arguments
 	// to deepMerge. Only because arguments can be anything.
 	if vSrc.Kind() == vDst.Kind() {
-		return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0)
+		return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0, config)
 	}
 	switch vSrc.Kind() {
 	case reflect.Struct:
@@ -142,5 +170,5 @@ func Map(dst, src interface{}) error {
 	default:
 		return ErrNotSupported
 	}
-	return deepMap(vDst, vSrc, make(map[uintptr]*visit), 0)
+	return deepMap(vDst, vSrc, make(map[uintptr]*visit), 0, config)
 }

vendor/github.com/imdario/mergo/merge.go

@@ -12,10 +12,34 @@ import (
 	"reflect"
 )
 
+func hasExportedField(dst reflect.Value) (exported bool) {
+	for i, n := 0, dst.NumField(); i < n; i++ {
+		field := dst.Type().Field(i)
+		if field.Anonymous && dst.Field(i).Kind() == reflect.Struct {
+			exported = exported || hasExportedField(dst.Field(i))
+		} else {
+			exported = exported || len(field.PkgPath) == 0
+		}
+	}
+	return
+}
+
+type Config struct {
+	Overwrite    bool
+	AppendSlice  bool
+	Transformers Transformers
+}
+
+type Transformers interface {
+	Transformer(reflect.Type) func(dst, src reflect.Value) error
+}
+
 // Traverses recursively both values, assigning src's fields values to dst.
 // The map argument tracks comparisons that have already been seen, which allows
 // short circuiting on recursive types.
-func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int) (err error) {
+func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) {
+	overwrite := config.Overwrite
+
 	if !src.IsValid() {
 		return
 	}
@@ -32,68 +56,190 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int) (e
 		// Remember, remember...
 		visited[h] = &visit{addr, typ, seen}
 	}
+
+	if config.Transformers != nil && !isEmptyValue(dst) {
+		if fn := config.Transformers.Transformer(dst.Type()); fn != nil {
+			err = fn(dst, src)
+			return
+		}
+	}
+
 	switch dst.Kind() {
 	case reflect.Struct:
-		for i, n := 0, dst.NumField(); i < n; i++ {
-			if err = deepMerge(dst.Field(i), src.Field(i), visited, depth+1); err != nil {
-				return
+		if hasExportedField(dst) {
+			for i, n := 0, dst.NumField(); i < n; i++ {
+				if err = deepMerge(dst.Field(i), src.Field(i), visited, depth+1, config); err != nil {
+					return
+				}
+			}
+		} else {
+			if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
+				dst.Set(src)
 			}
 		}
 	case reflect.Map:
+		if dst.IsNil() && !src.IsNil() {
+			dst.Set(reflect.MakeMap(dst.Type()))
+		}
 		for _, key := range src.MapKeys() {
 			srcElement := src.MapIndex(key)
 			if !srcElement.IsValid() {
 				continue
 			}
 			dstElement := dst.MapIndex(key)
-			switch reflect.TypeOf(srcElement.Interface()).Kind() {
-			case reflect.Struct:
+			switch srcElement.Kind() {
+			case reflect.Chan, reflect.Func, reflect.Map, reflect.Interface, reflect.Slice:
+				if srcElement.IsNil() {
+					continue
+				}
 				fallthrough
-			case reflect.Map:
-				if err = deepMerge(dstElement, srcElement, visited, depth+1); err != nil {
-					return
+			default:
+				if !srcElement.CanInterface() {
+					continue
+				}
+				switch reflect.TypeOf(srcElement.Interface()).Kind() {
+				case reflect.Struct:
+					fallthrough
+				case reflect.Ptr:
+					fallthrough
+				case reflect.Map:
+					srcMapElm := srcElement
+					dstMapElm := dstElement
+					if srcMapElm.CanInterface() {
+						srcMapElm = reflect.ValueOf(srcMapElm.Interface())
+						if dstMapElm.IsValid() {
+							dstMapElm = reflect.ValueOf(dstMapElm.Interface())
+						}
+					}
+					if err = deepMerge(dstMapElm, srcMapElm, visited, depth+1, config); err != nil {
+						return
+					}
+				case reflect.Slice:
+					srcSlice := reflect.ValueOf(srcElement.Interface())
+
+					var dstSlice reflect.Value
+					if !dstElement.IsValid() || dstElement.IsNil() {
+						dstSlice = reflect.MakeSlice(srcSlice.Type(), 0, srcSlice.Len())
+					} else {
+						dstSlice = reflect.ValueOf(dstElement.Interface())
+					}
+
+					if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
+						dstSlice = srcSlice
+					} else if config.AppendSlice {
+						dstSlice = reflect.AppendSlice(dstSlice, srcSlice)
+					}
+					dst.SetMapIndex(key, dstSlice)
 				}
 			}
-			if !dstElement.IsValid() {
+			if dstElement.IsValid() && reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map {
+				continue
+			}
+
+			if srcElement.IsValid() && (overwrite || (!dstElement.IsValid() || isEmptyValue(dstElement))) {
+				if dst.IsNil() {
+					dst.Set(reflect.MakeMap(dst.Type()))
+				}
 				dst.SetMapIndex(key, srcElement)
 			}
 		}
+	case reflect.Slice:
+		if !dst.CanSet() {
+			break
+		}
+		if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
+			dst.Set(src)
+		} else if config.AppendSlice {
+			dst.Set(reflect.AppendSlice(dst, src))
+		}
 	case reflect.Ptr:
 		fallthrough
 	case reflect.Interface:
 		if src.IsNil() {
 			break
-		} else if dst.IsNil() {
-			if dst.CanSet() && isEmptyValue(dst) {
+		}
+		if src.Kind() != reflect.Interface {
+			if dst.IsNil() || overwrite {
+				if dst.CanSet() && (overwrite || isEmptyValue(dst)) {
+					dst.Set(src)
+				}
+			} else if src.Kind() == reflect.Ptr {
+				if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil {
+					return
+				}
+			} else if dst.Elem().Type() == src.Type() {
+				if err = deepMerge(dst.Elem(), src, visited, depth+1, config); err != nil {
+					return
+				}
+			} else {
+				return ErrDifferentArgumentsTypes
+			}
+			break
+		}
+		if dst.IsNil() || overwrite {
+			if dst.CanSet() && (overwrite || isEmptyValue(dst)) {
 				dst.Set(src)
 			}
-		} else if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1); err != nil {
+		} else if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil {
 			return
 		}
 	default:
-		if dst.CanSet() && !isEmptyValue(src) {
+		if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
 			dst.Set(src)
 		}
 	}
 	return
 }
 
-// Merge sets fields' values in dst from src if they have a zero
-// value of their type.
-// dst and src must be valid same-type structs and dst must be
-// a pointer to struct.
-// It won't merge unexported (private) fields and will do recursively
-// any exported field.
-func Merge(dst, src interface{}) error {
+// Merge will fill any empty for value type attributes on the dst struct using corresponding
+// src attributes if they themselves are not empty. dst and src must be valid same-type structs
+// and dst must be a pointer to struct.
+// It won't merge unexported (private) fields and will do recursively any exported field.
+func Merge(dst, src interface{}, opts ...func(*Config)) error {
+	return merge(dst, src, opts...)
+}
+
+// MergeWithOverwrite will do the same as Merge except that non-empty dst attributes will be overriden by
+// non-empty src attribute values.
+// Deprecated: use Merge(…) with WithOverride
+func MergeWithOverwrite(dst, src interface{}, opts ...func(*Config)) error {
+	return merge(dst, src, append(opts, WithOverride)...)
+}
+
+// WithTransformers adds transformers to merge, allowing to customize the merging of some types.
+func WithTransformers(transformers Transformers) func(*Config) {
+	return func(config *Config) {
+		config.Transformers = transformers
+	}
+}
+
+// WithOverride will make merge override non-empty dst attributes with non-empty src attributes values.
+func WithOverride(config *Config) {
+	config.Overwrite = true
+}
+
+// WithAppendSlice will make merge append slices instead of overwriting it
+func WithAppendSlice(config *Config) {
+	config.AppendSlice = true
+}
+
+func merge(dst, src interface{}, opts ...func(*Config)) error {
 	var (
 		vDst, vSrc reflect.Value
 		err        error
 	)
+
+	config := &Config{}
+
+	for _, opt := range opts {
+		opt(config)
+	}
+
 	if vDst, vSrc, err = resolveValues(dst, src); err != nil {
 		return err
 	}
 	if vDst.Type() != vSrc.Type() {
 		return ErrDifferentArgumentsTypes
 	}
-	return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0)
+	return deepMerge(vDst, vSrc, make(map[uintptr]*visit), 0, config)
 }

vendor/github.com/imdario/mergo/mergo.go

@@ -32,7 +32,7 @@ type visit struct {
 	next *visit
 }
 
-// From src/pkg/encoding/json.
+// From src/pkg/encoding/json/encode.go.
 func isEmptyValue(v reflect.Value) bool {
 	switch v.Kind() {
 	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
@@ -46,7 +46,14 @@ func isEmptyValue(v reflect.Value) bool {
 	case reflect.Float32, reflect.Float64:
 		return v.Float() == 0
 	case reflect.Interface, reflect.Ptr:
+		if v.IsNil() {
+			return true
+		}
+		return isEmptyValue(v.Elem())
+	case reflect.Func:
 		return v.IsNil()
+	case reflect.Invalid:
+		return true
 	}
 	return false
 }

vendor/github.com/json-iterator/go/Gopkg.lock

@@ -1,12 +1,6 @@
 # This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
 
 
-[[projects]]
-  name = "github.com/json-iterator/go"
-  packages = ["."]
-  revision = "ca39e5af3ece67bbcda3d0f4f56a8e24d9f2dad4"
-  version = "1.1.3"
-
 [[projects]]
   name = "github.com/modern-go/concurrent"
   packages = ["."]
@@ -16,12 +10,12 @@
 [[projects]]
   name = "github.com/modern-go/reflect2"
   packages = ["."]
-  revision = "1df9eeb2bb81f327b96228865c5687bc2194af3f"
-  version = "1.0.0"
+  revision = "4b7aa43c6742a2c18fdef89dd197aaae7dac7ccd"
+  version = "1.0.1"
 
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "56a0b9e9e61d2bc8af5e1b68537401b7f4d60805eda3d107058f3171aa5cf793"
+  inputs-digest = "ea54a775e5a354cb015502d2e7aa4b74230fc77e894f34a838b268c25ec8eeb8"
   solver-name = "gps-cdcl"
   solver-version = 1

vendor/github.com/json-iterator/go/Gopkg.toml

@@ -23,4 +23,4 @@ ignored = ["github.com/davecgh/go-spew*","github.com/google/gofuzz*","github.com
 
 [[constraint]]
   name = "github.com/modern-go/reflect2"
-  version = "1.0.0"
+  version = "1.0.1"

vendor/github.com/modern-go/reflect2/.travis.yml

@@ -6,6 +6,7 @@ go:
 
 before_install:
   - go get -t -v ./...
+  - go get -t -v github.com/modern-go/reflect2-tests/...
 
 script:
   - ./test.sh

vendor/github.com/modern-go/reflect2/Gopkg.toml

@@ -24,7 +24,7 @@
 #   go-tests = true
 #   unused-packages = true
 
-ignored = ["github.com/modern-go/test","github.com/modern-go/test/must","github.com/modern-go/test/should"]
+ignored = []
 
 [[constraint]]
   name = "github.com/modern-go/concurrent"

vendor/github.com/modern-go/reflect2/reflect2.go

@@ -150,6 +150,9 @@ func (cfg *frozenConfig) TypeOf(obj interface{}) Type {
 }
 
 func (cfg *frozenConfig) Type2(type1 reflect.Type) Type {
+	if type1 == nil {
+		return nil
+	}
 	cacheKey := uintptr(unpackEFace(type1).data)
 	typeObj, found := cfg.cache.Load(cacheKey)
 	if found {

vendor/github.com/modern-go/reflect2/test.sh

@@ -3,7 +3,7 @@
 set -e
 echo "" > coverage.txt
 
-for d in $(go list ./... | grep -v vendor); do
+for d in $(go list github.com/modern-go/reflect2-tests/... | grep -v vendor); do
     go test -coverprofile=profile.out -coverpkg=github.com/modern-go/reflect2 $d
     if [ -f profile.out ]; then
         cat profile.out >> coverage.txt

vendor/github.com/modern-go/reflect2/type_map.go

@@ -4,6 +4,7 @@ import (
 	"reflect"
 	"runtime"
 	"strings"
+	"sync"
 	"unsafe"
 )
 
@@ -15,10 +16,17 @@ func typelinks1() [][]unsafe.Pointer
 //go:linkname typelinks2 reflect.typelinks
 func typelinks2() (sections []unsafe.Pointer, offset [][]int32)
 
-var types = map[string]reflect.Type{}
-var packages = map[string]map[string]reflect.Type{}
+// initOnce guards initialization of types and packages
+var initOnce sync.Once
+
+var types map[string]reflect.Type
+var packages map[string]map[string]reflect.Type
+
+// discoverTypes initializes types and packages
+func discoverTypes() {
+	types = make(map[string]reflect.Type)
+	packages = make(map[string]map[string]reflect.Type)
 
-func init() {
 	ver := runtime.Version()
 	if ver == "go1.5" || strings.HasPrefix(ver, "go1.5.") {
 		loadGo15Types()
@@ -90,11 +98,13 @@ type emptyInterface struct {
 
 // TypeByName return the type by its name, just like Class.forName in java
 func TypeByName(typeName string) Type {
+	initOnce.Do(discoverTypes)
 	return Type2(types[typeName])
 }
 
 // TypeByPackageName return the type by its package and name
 func TypeByPackageName(pkgPath string, name string) Type {
+	initOnce.Do(discoverTypes)
 	pkgTypes := packages[pkgPath]
 	if pkgTypes == nil {
 		return nil

vendor/github.com/peterbourgon/diskv/LICENSE

@@ -1,19 +0,0 @@
-Copyright (c) 2011-2012 Peter Bourgon
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.

vendor/github.com/peterbourgon/diskv/README.md

@@ -1,141 +0,0 @@
-# What is diskv?
-
-Diskv (disk-vee) is a simple, persistent key-value store written in the Go
-language. It starts with an incredibly simple API for storing arbitrary data on
-a filesystem by key, and builds several layers of performance-enhancing
-abstraction on top.  The end result is a conceptually simple, but highly
-performant, disk-backed storage system.
-
-[![Build Status][1]][2]
-
-[1]: https://drone.io/github.com/peterbourgon/diskv/status.png
-[2]: https://drone.io/github.com/peterbourgon/diskv/latest
-
-
-# Installing
-
-Install [Go 1][3], either [from source][4] or [with a prepackaged binary][5].
-Then,
-
-```bash
-$ go get github.com/peterbourgon/diskv
-```
-
-[3]: http://golang.org
-[4]: http://golang.org/doc/install/source
-[5]: http://golang.org/doc/install
-
-
-# Usage
-
-```go
-package main
-
-import (
-	"fmt"
-	"github.com/peterbourgon/diskv"
-)
-
-func main() {
-	// Simplest transform function: put all the data files into the base dir.
-	flatTransform := func(s string) []string { return []string{} }
-
-	// Initialize a new diskv store, rooted at "my-data-dir", with a 1MB cache.
-	d := diskv.New(diskv.Options{
-		BasePath:     "my-data-dir",
-		Transform:    flatTransform,
-		CacheSizeMax: 1024 * 1024,
-	})
-
-	// Write three bytes to the key "alpha".
-	key := "alpha"
-	d.Write(key, []byte{'1', '2', '3'})
-
-	// Read the value back out of the store.
-	value, _ := d.Read(key)
-	fmt.Printf("%v\n", value)
-
-	// Erase the key+value from the store (and the disk).
-	d.Erase(key)
-}
-```
-
-More complex examples can be found in the "examples" subdirectory.
-
-
-# Theory
-
-## Basic idea
-
-At its core, diskv is a map of a key (`string`) to arbitrary data (`[]byte`).
-The data is written to a single file on disk, with the same name as the key.
-The key determines where that file will be stored, via a user-provided
-`TransformFunc`, which takes a key and returns a slice (`[]string`)
-corresponding to a path list where the key file will be stored. The simplest
-TransformFunc,
-
-```go
-func SimpleTransform (key string) []string {
-    return []string{}
-}
-```
-
-will place all keys in the same, base directory. The design is inspired by
-[Redis diskstore][6]; a TransformFunc which emulates the default diskstore
-behavior is available in the content-addressable-storage example.
-
-[6]: http://groups.google.com/group/redis-db/browse_thread/thread/d444bc786689bde9?pli=1
-
-**Note** that your TransformFunc should ensure that one valid key doesn't
-transform to a subset of another valid key. That is, it shouldn't be possible
-to construct valid keys that resolve to directory names. As a concrete example,
-if your TransformFunc splits on every 3 characters, then
-
-```go
-d.Write("abcabc", val) // OK: written to <base>/abc/abc/abcabc
-d.Write("abc", val)    // Error: attempted write to <base>/abc/abc, but it's a directory
-```
-
-This will be addressed in an upcoming version of diskv.
-
-Probably the most important design principle behind diskv is that your data is
-always flatly available on the disk. diskv will never do anything that would
-prevent you from accessing, copying, backing up, or otherwise interacting with
-your data via common UNIX commandline tools.
-
-## Adding a cache
-
-An in-memory caching layer is provided by combining the BasicStore
-functionality with a simple map structure, and keeping it up-to-date as
-appropriate. Since the map structure in Go is not threadsafe, it's combined
-with a RWMutex to provide safe concurrent access.
-
-## Adding order
-
-diskv is a key-value store and therefore inherently unordered. An ordering
-system can be injected into the store by passing something which satisfies the
-diskv.Index interface. (A default implementation, using Google's
-[btree][7] package, is provided.) Basically, diskv keeps an ordered (by a
-user-provided Less function) index of the keys, which can be queried.
-
-[7]: https://github.com/google/btree
-
-## Adding compression
-
-Something which implements the diskv.Compression interface may be passed
-during store creation, so that all Writes and Reads are filtered through
-a compression/decompression pipeline. Several default implementations,
-using stdlib compression algorithms, are provided. Note that data is cached
-compressed; the cost of decompression is borne with each Read.
-
-## Streaming
-
-diskv also now provides ReadStream and WriteStream methods, to allow very large
-data to be handled efficiently.
-
-
-# Future plans
-
- * Needs plenty of robust testing: huge datasets, etc...
- * More thorough benchmarking
- * Your suggestions for use-cases I haven't thought of

vendor/github.com/peterbourgon/diskv/compression.go

@@ -1,64 +0,0 @@
-package diskv
-
-import (
-	"compress/flate"
-	"compress/gzip"
-	"compress/zlib"
-	"io"
-)
-
-// Compression is an interface that Diskv uses to implement compression of
-// data. Writer takes a destination io.Writer and returns a WriteCloser that
-// compresses all data written through it. Reader takes a source io.Reader and
-// returns a ReadCloser that decompresses all data read through it. You may
-// define these methods on your own type, or use one of the NewCompression
-// helpers.
-type Compression interface {
-	Writer(dst io.Writer) (io.WriteCloser, error)
-	Reader(src io.Reader) (io.ReadCloser, error)
-}
-
-// NewGzipCompression returns a Gzip-based Compression.
-func NewGzipCompression() Compression {
-	return NewGzipCompressionLevel(flate.DefaultCompression)
-}
-
-// NewGzipCompressionLevel returns a Gzip-based Compression with the given level.
-func NewGzipCompressionLevel(level int) Compression {
-	return &genericCompression{
-		wf: func(w io.Writer) (io.WriteCloser, error) { return gzip.NewWriterLevel(w, level) },
-		rf: func(r io.Reader) (io.ReadCloser, error) { return gzip.NewReader(r) },
-	}
-}
-
-// NewZlibCompression returns a Zlib-based Compression.
-func NewZlibCompression() Compression {
-	return NewZlibCompressionLevel(flate.DefaultCompression)
-}
-
-// NewZlibCompressionLevel returns a Zlib-based Compression with the given level.
-func NewZlibCompressionLevel(level int) Compression {
-	return NewZlibCompressionLevelDict(level, nil)
-}
-
-// NewZlibCompressionLevelDict returns a Zlib-based Compression with the given
-// level, based on the given dictionary.
-func NewZlibCompressionLevelDict(level int, dict []byte) Compression {
-	return &genericCompression{
-		func(w io.Writer) (io.WriteCloser, error) { return zlib.NewWriterLevelDict(w, level, dict) },
-		func(r io.Reader) (io.ReadCloser, error) { return zlib.NewReaderDict(r, dict) },
-	}
-}
-
-type genericCompression struct {
-	wf func(w io.Writer) (io.WriteCloser, error)
-	rf func(r io.Reader) (io.ReadCloser, error)
-}
-
-func (g *genericCompression) Writer(dst io.Writer) (io.WriteCloser, error) {
-	return g.wf(dst)
-}
-
-func (g *genericCompression) Reader(src io.Reader) (io.ReadCloser, error) {
-	return g.rf(src)
-}

vendor/github.com/peterbourgon/diskv/diskv.go

@@ -1,624 +0,0 @@
-// Diskv (disk-vee) is a simple, persistent, key-value store.
-// It stores all data flatly on the filesystem.
-
-package diskv
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"strings"
-	"sync"
-	"syscall"
-)
-
-const (
-	defaultBasePath             = "diskv"
-	defaultFilePerm os.FileMode = 0666
-	defaultPathPerm os.FileMode = 0777
-)
-
-var (
-	defaultTransform   = func(s string) []string { return []string{} }
-	errCanceled        = errors.New("canceled")
-	errEmptyKey        = errors.New("empty key")
-	errBadKey          = errors.New("bad key")
-	errImportDirectory = errors.New("can't import a directory")
-)
-
-// TransformFunction transforms a key into a slice of strings, with each
-// element in the slice representing a directory in the file path where the
-// key's entry will eventually be stored.
-//
-// For example, if TransformFunc transforms "abcdef" to ["ab", "cde", "f"],
-// the final location of the data file will be <basedir>/ab/cde/f/abcdef
-type TransformFunction func(s string) []string
-
-// Options define a set of properties that dictate Diskv behavior.
-// All values are optional.
-type Options struct {
-	BasePath     string
-	Transform    TransformFunction
-	CacheSizeMax uint64 // bytes
-	PathPerm     os.FileMode
-	FilePerm     os.FileMode
-	// If TempDir is set, it will enable filesystem atomic writes by
-	// writing temporary files to that location before being moved
-	// to BasePath.
-	// Note that TempDir MUST be on the same device/partition as
-	// BasePath.
-	TempDir string
-
-	Index     Index
-	IndexLess LessFunction
-
-	Compression Compression
-}
-
-// Diskv implements the Diskv interface. You shouldn't construct Diskv
-// structures directly; instead, use the New constructor.
-type Diskv struct {
-	Options
-	mu        sync.RWMutex
-	cache     map[string][]byte
-	cacheSize uint64
-}
-
-// New returns an initialized Diskv structure, ready to use.
-// If the path identified by baseDir already contains data,
-// it will be accessible, but not yet cached.
-func New(o Options) *Diskv {
-	if o.BasePath == "" {
-		o.BasePath = defaultBasePath
-	}
-	if o.Transform == nil {
-		o.Transform = defaultTransform
-	}
-	if o.PathPerm == 0 {
-		o.PathPerm = defaultPathPerm
-	}
-	if o.FilePerm == 0 {
-		o.FilePerm = defaultFilePerm
-	}
-
-	d := &Diskv{
-		Options:   o,
-		cache:     map[string][]byte{},
-		cacheSize: 0,
-	}
-
-	if d.Index != nil && d.IndexLess != nil {
-		d.Index.Initialize(d.IndexLess, d.Keys(nil))
-	}
-
-	return d
-}
-
-// Write synchronously writes the key-value pair to disk, making it immediately
-// available for reads. Write relies on the filesystem to perform an eventual
-// sync to physical media. If you need stronger guarantees, see WriteStream.
-func (d *Diskv) Write(key string, val []byte) error {
-	return d.WriteStream(key, bytes.NewBuffer(val), false)
-}
-
-// WriteStream writes the data represented by the io.Reader to the disk, under
-// the provided key. If sync is true, WriteStream performs an explicit sync on
-// the file as soon as it's written.
-//
-// bytes.Buffer provides io.Reader semantics for basic data types.
-func (d *Diskv) WriteStream(key string, r io.Reader, sync bool) error {
-	if len(key) <= 0 {
-		return errEmptyKey
-	}
-
-	d.mu.Lock()
-	defer d.mu.Unlock()
-
-	return d.writeStreamWithLock(key, r, sync)
-}
-
-// createKeyFileWithLock either creates the key file directly, or
-// creates a temporary file in TempDir if it is set.
-func (d *Diskv) createKeyFileWithLock(key string) (*os.File, error) {
-	if d.TempDir != "" {
-		if err := os.MkdirAll(d.TempDir, d.PathPerm); err != nil {
-			return nil, fmt.Errorf("temp mkdir: %s", err)
-		}
-		f, err := ioutil.TempFile(d.TempDir, "")
-		if err != nil {
-			return nil, fmt.Errorf("temp file: %s", err)
-		}
-
-		if err := f.Chmod(d.FilePerm); err != nil {
-			f.Close()           // error deliberately ignored
-			os.Remove(f.Name()) // error deliberately ignored
-			return nil, fmt.Errorf("chmod: %s", err)
-		}
-		return f, nil
-	}
-
-	mode := os.O_WRONLY | os.O_CREATE | os.O_TRUNC // overwrite if exists
-	f, err := os.OpenFile(d.completeFilename(key), mode, d.FilePerm)
-	if err != nil {
-		return nil, fmt.Errorf("open file: %s", err)
-	}
-	return f, nil
-}
-
-// writeStream does no input validation checking.
-func (d *Diskv) writeStreamWithLock(key string, r io.Reader, sync bool) error {
-	if err := d.ensurePathWithLock(key); err != nil {
-		return fmt.Errorf("ensure path: %s", err)
-	}
-
-	f, err := d.createKeyFileWithLock(key)
-	if err != nil {
-		return fmt.Errorf("create key file: %s", err)
-	}
-
-	wc := io.WriteCloser(&nopWriteCloser{f})
-	if d.Compression != nil {
-		wc, err = d.Compression.Writer(f)
-		if err != nil {
-			f.Close()           // error deliberately ignored
-			os.Remove(f.Name()) // error deliberately ignored
-			return fmt.Errorf("compression writer: %s", err)
-		}
-	}
-
-	if _, err := io.Copy(wc, r); err != nil {
-		f.Close()           // error deliberately ignored
-		os.Remove(f.Name()) // error deliberately ignored
-		return fmt.Errorf("i/o copy: %s", err)
-	}
-
-	if err := wc.Close(); err != nil {
-		f.Close()           // error deliberately ignored
-		os.Remove(f.Name()) // error deliberately ignored
-		return fmt.Errorf("compression close: %s", err)
-	}
-
-	if sync {
-		if err := f.Sync(); err != nil {
-			f.Close()           // error deliberately ignored
-			os.Remove(f.Name()) // error deliberately ignored
-			return fmt.Errorf("file sync: %s", err)
-		}
-	}
-
-	if err := f.Close(); err != nil {
-		return fmt.Errorf("file close: %s", err)
-	}
-
-	if f.Name() != d.completeFilename(key) {
-		if err := os.Rename(f.Name(), d.completeFilename(key)); err != nil {
-			os.Remove(f.Name()) // error deliberately ignored
-			return fmt.Errorf("rename: %s", err)
-		}
-	}
-
-	if d.Index != nil {
-		d.Index.Insert(key)
-	}
-
-	d.bustCacheWithLock(key) // cache only on read
-
-	return nil
-}
-
-// Import imports the source file into diskv under the destination key. If the
-// destination key already exists, it's overwritten. If move is true, the
-// source file is removed after a successful import.
-func (d *Diskv) Import(srcFilename, dstKey string, move bool) (err error) {
-	if dstKey == "" {
-		return errEmptyKey
-	}
-
-	if fi, err := os.Stat(srcFilename); err != nil {
-		return err
-	} else if fi.IsDir() {
-		return errImportDirectory
-	}
-
-	d.mu.Lock()
-	defer d.mu.Unlock()
-
-	if err := d.ensurePathWithLock(dstKey); err != nil {
-		return fmt.Errorf("ensure path: %s", err)
-	}
-
-	if move {
-		if err := syscall.Rename(srcFilename, d.completeFilename(dstKey)); err == nil {
-			d.bustCacheWithLock(dstKey)
-			return nil
-		} else if err != syscall.EXDEV {
-			// If it failed due to being on a different device, fall back to copying
-			return err
-		}
-	}
-
-	f, err := os.Open(srcFilename)
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-	err = d.writeStreamWithLock(dstKey, f, false)
-	if err == nil && move {
-		err = os.Remove(srcFilename)
-	}
-	return err
-}
-
-// Read reads the key and returns the value.
-// If the key is available in the cache, Read won't touch the disk.
-// If the key is not in the cache, Read will have the side-effect of
-// lazily caching the value.
-func (d *Diskv) Read(key string) ([]byte, error) {
-	rc, err := d.ReadStream(key, false)
-	if err != nil {
-		return []byte{}, err
-	}
-	defer rc.Close()
-	return ioutil.ReadAll(rc)
-}
-
-// ReadStream reads the key and returns the value (data) as an io.ReadCloser.
-// If the value is cached from a previous read, and direct is false,
-// ReadStream will use the cached value. Otherwise, it will return a handle to
-// the file on disk, and cache the data on read.
-//
-// If direct is true, ReadStream will lazily delete any cached value for the
-// key, and return a direct handle to the file on disk.
-//
-// If compression is enabled, ReadStream taps into the io.Reader stream prior
-// to decompression, and caches the compressed data.
-func (d *Diskv) ReadStream(key string, direct bool) (io.ReadCloser, error) {
-	d.mu.RLock()
-	defer d.mu.RUnlock()
-
-	if val, ok := d.cache[key]; ok {
-		if !direct {
-			buf := bytes.NewBuffer(val)
-			if d.Compression != nil {
-				return d.Compression.Reader(buf)
-			}
-			return ioutil.NopCloser(buf), nil
-		}
-
-		go func() {
-			d.mu.Lock()
-			defer d.mu.Unlock()
-			d.uncacheWithLock(key, uint64(len(val)))
-		}()
-	}
-
-	return d.readWithRLock(key)
-}
-
-// read ignores the cache, and returns an io.ReadCloser representing the
-// decompressed data for the given key, streamed from the disk. Clients should
-// acquire a read lock on the Diskv and check the cache themselves before
-// calling read.
-func (d *Diskv) readWithRLock(key string) (io.ReadCloser, error) {
-	filename := d.completeFilename(key)
-
-	fi, err := os.Stat(filename)
-	if err != nil {
-		return nil, err
-	}
-	if fi.IsDir() {
-		return nil, os.ErrNotExist
-	}
-
-	f, err := os.Open(filename)
-	if err != nil {
-		return nil, err
-	}
-
-	var r io.Reader
-	if d.CacheSizeMax > 0 {
-		r = newSiphon(f, d, key)
-	} else {
-		r = &closingReader{f}
-	}
-
-	var rc = io.ReadCloser(ioutil.NopCloser(r))
-	if d.Compression != nil {
-		rc, err = d.Compression.Reader(r)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return rc, nil
-}
-
-// closingReader provides a Reader that automatically closes the
-// embedded ReadCloser when it reaches EOF
-type closingReader struct {
-	rc io.ReadCloser
-}
-
-func (cr closingReader) Read(p []byte) (int, error) {
-	n, err := cr.rc.Read(p)
-	if err == io.EOF {
-		if closeErr := cr.rc.Close(); closeErr != nil {
-			return n, closeErr // close must succeed for Read to succeed
-		}
-	}
-	return n, err
-}
-
-// siphon is like a TeeReader: it copies all data read through it to an
-// internal buffer, and moves that buffer to the cache at EOF.
-type siphon struct {
-	f   *os.File
-	d   *Diskv
-	key string
-	buf *bytes.Buffer
-}
-
-// newSiphon constructs a siphoning reader that represents the passed file.
-// When a successful series of reads ends in an EOF, the siphon will write
-// the buffered data to Diskv's cache under the given key.
-func newSiphon(f *os.File, d *Diskv, key string) io.Reader {
-	return &siphon{
-		f:   f,
-		d:   d,
-		key: key,
-		buf: &bytes.Buffer{},
-	}
-}
-
-// Read implements the io.Reader interface for siphon.
-func (s *siphon) Read(p []byte) (int, error) {
-	n, err := s.f.Read(p)
-
-	if err == nil {
-		return s.buf.Write(p[0:n]) // Write must succeed for Read to succeed
-	}
-
-	if err == io.EOF {
-		s.d.cacheWithoutLock(s.key, s.buf.Bytes()) // cache may fail
-		if closeErr := s.f.Close(); closeErr != nil {
-			return n, closeErr // close must succeed for Read to succeed
-		}
-		return n, err
-	}
-
-	return n, err
-}
-
-// Erase synchronously erases the given key from the disk and the cache.
-func (d *Diskv) Erase(key string) error {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-
-	d.bustCacheWithLock(key)
-
-	// erase from index
-	if d.Index != nil {
-		d.Index.Delete(key)
-	}
-
-	// erase from disk
-	filename := d.completeFilename(key)
-	if s, err := os.Stat(filename); err == nil {
-		if s.IsDir() {
-			return errBadKey
-		}
-		if err = os.Remove(filename); err != nil {
-			return err
-		}
-	} else {
-		// Return err as-is so caller can do os.IsNotExist(err).
-		return err
-	}
-
-	// clean up and return
-	d.pruneDirsWithLock(key)
-	return nil
-}
-
-// EraseAll will delete all of the data from the store, both in the cache and on
-// the disk. Note that EraseAll doesn't distinguish diskv-related data from non-
-// diskv-related data. Care should be taken to always specify a diskv base
-// directory that is exclusively for diskv data.
-func (d *Diskv) EraseAll() error {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	d.cache = make(map[string][]byte)
-	d.cacheSize = 0
-	if d.TempDir != "" {
-		os.RemoveAll(d.TempDir) // errors ignored
-	}
-	return os.RemoveAll(d.BasePath)
-}
-
-// Has returns true if the given key exists.
-func (d *Diskv) Has(key string) bool {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-
-	if _, ok := d.cache[key]; ok {
-		return true
-	}
-
-	filename := d.completeFilename(key)
-	s, err := os.Stat(filename)
-	if err != nil {
-		return false
-	}
-	if s.IsDir() {
-		return false
-	}
-
-	return true
-}
-
-// Keys returns a channel that will yield every key accessible by the store,
-// in undefined order. If a cancel channel is provided, closing it will
-// terminate and close the keys channel.
-func (d *Diskv) Keys(cancel <-chan struct{}) <-chan string {
-	return d.KeysPrefix("", cancel)
-}
-
-// KeysPrefix returns a channel that will yield every key accessible by the
-// store with the given prefix, in undefined order. If a cancel channel is
-// provided, closing it will terminate and close the keys channel. If the
-// provided prefix is the empty string, all keys will be yielded.
-func (d *Diskv) KeysPrefix(prefix string, cancel <-chan struct{}) <-chan string {
-	var prepath string
-	if prefix == "" {
-		prepath = d.BasePath
-	} else {
-		prepath = d.pathFor(prefix)
-	}
-	c := make(chan string)
-	go func() {
-		filepath.Walk(prepath, walker(c, prefix, cancel))
-		close(c)
-	}()
-	return c
-}
-
-// walker returns a function which satisfies the filepath.WalkFunc interface.
-// It sends every non-directory file entry down the channel c.
-func walker(c chan<- string, prefix string, cancel <-chan struct{}) filepath.WalkFunc {
-	return func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
-		if info.IsDir() || !strings.HasPrefix(info.Name(), prefix) {
-			return nil // "pass"
-		}
-
-		select {
-		case c <- info.Name():
-		case <-cancel:
-			return errCanceled
-		}
-
-		return nil
-	}
-}
-
-// pathFor returns the absolute path for location on the filesystem where the
-// data for the given key will be stored.
-func (d *Diskv) pathFor(key string) string {
-	return filepath.Join(d.BasePath, filepath.Join(d.Transform(key)...))
-}
-
-// ensurePathWithLock is a helper function that generates all necessary
-// directories on the filesystem for the given key.
-func (d *Diskv) ensurePathWithLock(key string) error {
-	return os.MkdirAll(d.pathFor(key), d.PathPerm)
-}
-
-// completeFilename returns the absolute path to the file for the given key.
-func (d *Diskv) completeFilename(key string) string {
-	return filepath.Join(d.pathFor(key), key)
-}
-
-// cacheWithLock attempts to cache the given key-value pair in the store's
-// cache. It can fail if the value is larger than the cache's maximum size.
-func (d *Diskv) cacheWithLock(key string, val []byte) error {
-	valueSize := uint64(len(val))
-	if err := d.ensureCacheSpaceWithLock(valueSize); err != nil {
-		return fmt.Errorf("%s; not caching", err)
-	}
-
-	// be very strict about memory guarantees
-	if (d.cacheSize + valueSize) > d.CacheSizeMax {
-		panic(fmt.Sprintf("failed to make room for value (%d/%d)", valueSize, d.CacheSizeMax))
-	}
-
-	d.cache[key] = val
-	d.cacheSize += valueSize
-	return nil
-}
-
-// cacheWithoutLock acquires the store's (write) mutex and calls cacheWithLock.
-func (d *Diskv) cacheWithoutLock(key string, val []byte) error {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	return d.cacheWithLock(key, val)
-}
-
-func (d *Diskv) bustCacheWithLock(key string) {
-	if val, ok := d.cache[key]; ok {
-		d.uncacheWithLock(key, uint64(len(val)))
-	}
-}
-
-func (d *Diskv) uncacheWithLock(key string, sz uint64) {
-	d.cacheSize -= sz
-	delete(d.cache, key)
-}
-
-// pruneDirsWithLock deletes empty directories in the path walk leading to the
-// key k. Typically this function is called after an Erase is made.
-func (d *Diskv) pruneDirsWithLock(key string) error {
-	pathlist := d.Transform(key)
-	for i := range pathlist {
-		dir := filepath.Join(d.BasePath, filepath.Join(pathlist[:len(pathlist)-i]...))
-
-		// thanks to Steven Blenkinsop for this snippet
-		switch fi, err := os.Stat(dir); true {
-		case err != nil:
-			return err
-		case !fi.IsDir():
-			panic(fmt.Sprintf("corrupt dirstate at %s", dir))
-		}
-
-		nlinks, err := filepath.Glob(filepath.Join(dir, "*"))
-		if err != nil {
-			return err
-		} else if len(nlinks) > 0 {
-			return nil // has subdirs -- do not prune
-		}
-		if err = os.Remove(dir); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// ensureCacheSpaceWithLock deletes entries from the cache in arbitrary order
-// until the cache has at least valueSize bytes available.
-func (d *Diskv) ensureCacheSpaceWithLock(valueSize uint64) error {
-	if valueSize > d.CacheSizeMax {
-		return fmt.Errorf("value size (%d bytes) too large for cache (%d bytes)", valueSize, d.CacheSizeMax)
-	}
-
-	safe := func() bool { return (d.cacheSize + valueSize) <= d.CacheSizeMax }
-
-	for key, val := range d.cache {
-		if safe() {
-			break
-		}
-
-		d.uncacheWithLock(key, uint64(len(val)))
-	}
-
-	if !safe() {
-		panic(fmt.Sprintf("%d bytes still won't fit in the cache! (max %d bytes)", valueSize, d.CacheSizeMax))
-	}
-
-	return nil
-}
-
-// nopWriteCloser wraps an io.Writer and provides a no-op Close method to
-// satisfy the io.WriteCloser interface.
-type nopWriteCloser struct {
-	io.Writer
-}
-
-func (wc *nopWriteCloser) Write(p []byte) (int, error) { return wc.Writer.Write(p) }
-func (wc *nopWriteCloser) Close() error                { return nil }

vendor/github.com/peterbourgon/diskv/index.go

@@ -1,115 +0,0 @@
-package diskv
-
-import (
-	"sync"
-
-	"github.com/google/btree"
-)
-
-// Index is a generic interface for things that can
-// provide an ordered list of keys.
-type Index interface {
-	Initialize(less LessFunction, keys <-chan string)
-	Insert(key string)
-	Delete(key string)
-	Keys(from string, n int) []string
-}
-
-// LessFunction is used to initialize an Index of keys in a specific order.
-type LessFunction func(string, string) bool
-
-// btreeString is a custom data type that satisfies the BTree Less interface,
-// making the strings it wraps sortable by the BTree package.
-type btreeString struct {
-	s string
-	l LessFunction
-}
-
-// Less satisfies the BTree.Less interface using the btreeString's LessFunction.
-func (s btreeString) Less(i btree.Item) bool {
-	return s.l(s.s, i.(btreeString).s)
-}
-
-// BTreeIndex is an implementation of the Index interface using google/btree.
-type BTreeIndex struct {
-	sync.RWMutex
-	LessFunction
-	*btree.BTree
-}
-
-// Initialize populates the BTree tree with data from the keys channel,
-// according to the passed less function. It's destructive to the BTreeIndex.
-func (i *BTreeIndex) Initialize(less LessFunction, keys <-chan string) {
-	i.Lock()
-	defer i.Unlock()
-	i.LessFunction = less
-	i.BTree = rebuild(less, keys)
-}
-
-// Insert inserts the given key (only) into the BTree tree.
-func (i *BTreeIndex) Insert(key string) {
-	i.Lock()
-	defer i.Unlock()
-	if i.BTree == nil || i.LessFunction == nil {
-		panic("uninitialized index")
-	}
-	i.BTree.ReplaceOrInsert(btreeString{s: key, l: i.LessFunction})
-}
-
-// Delete removes the given key (only) from the BTree tree.
-func (i *BTreeIndex) Delete(key string) {
-	i.Lock()
-	defer i.Unlock()
-	if i.BTree == nil || i.LessFunction == nil {
-		panic("uninitialized index")
-	}
-	i.BTree.Delete(btreeString{s: key, l: i.LessFunction})
-}
-
-// Keys yields a maximum of n keys in order. If the passed 'from' key is empty,
-// Keys will return the first n keys. If the passed 'from' key is non-empty, the
-// first key in the returned slice will be the key that immediately follows the
-// passed key, in key order.
-func (i *BTreeIndex) Keys(from string, n int) []string {
-	i.RLock()
-	defer i.RUnlock()
-
-	if i.BTree == nil || i.LessFunction == nil {
-		panic("uninitialized index")
-	}
-
-	if i.BTree.Len() <= 0 {
-		return []string{}
-	}
-
-	btreeFrom := btreeString{s: from, l: i.LessFunction}
-	skipFirst := true
-	if len(from) <= 0 || !i.BTree.Has(btreeFrom) {
-		// no such key, so fabricate an always-smallest item
-		btreeFrom = btreeString{s: "", l: func(string, string) bool { return true }}
-		skipFirst = false
-	}
-
-	keys := []string{}
-	iterator := func(i btree.Item) bool {
-		keys = append(keys, i.(btreeString).s)
-		return len(keys) < n
-	}
-	i.BTree.AscendGreaterOrEqual(btreeFrom, iterator)
-
-	if skipFirst && len(keys) > 0 {
-		keys = keys[1:]
-	}
-
-	return keys
-}
-
-// rebuildIndex does the work of regenerating the index
-// with the given keys.
-func rebuild(less LessFunction, keys <-chan string) *btree.BTree {
-	tree := btree.New(2)
-	for key := range keys {
-		tree.ReplaceOrInsert(btreeString{s: key, l: less})
-	}
-	return tree
-}

vendor/golang.org/x/crypto/ssh/terminal/util.go

@@ -108,9 +108,7 @@ func ReadPassword(fd int) ([]byte, error) {
 		return nil, err
 	}
 
-	defer func() {
-		unix.IoctlSetTermios(fd, ioctlWriteTermios, termios)
-	}()
+	defer unix.IoctlSetTermios(fd, ioctlWriteTermios, termios)
 
 	return readPasswordLine(passwordReader(fd))
 }

vendor/golang.org/x/crypto/ssh/terminal/util_solaris.go

@@ -14,7 +14,7 @@ import (
 
 // State contains the state of a terminal.
 type State struct {
-	state *unix.Termios
+	termios unix.Termios
 }
 
 // IsTerminal returns true if the given file descriptor is a terminal.
@@ -75,47 +75,43 @@ func ReadPassword(fd int) ([]byte, error) {
 // restored.
 // see http://cr.illumos.org/~webrev/andy_js/1060/
 func MakeRaw(fd int) (*State, error) {
-	oldTermiosPtr, err := unix.IoctlGetTermios(fd, unix.TCGETS)
+	termios, err := unix.IoctlGetTermios(fd, unix.TCGETS)
 	if err != nil {
 		return nil, err
 	}
-	oldTermios := *oldTermiosPtr
 
-	newTermios := oldTermios
-	newTermios.Iflag &^= syscall.IGNBRK | syscall.BRKINT | syscall.PARMRK | syscall.ISTRIP | syscall.INLCR | syscall.IGNCR | syscall.ICRNL | syscall.IXON
-	newTermios.Oflag &^= syscall.OPOST
-	newTermios.Lflag &^= syscall.ECHO | syscall.ECHONL | syscall.ICANON | syscall.ISIG | syscall.IEXTEN
-	newTermios.Cflag &^= syscall.CSIZE | syscall.PARENB
-	newTermios.Cflag |= syscall.CS8
-	newTermios.Cc[unix.VMIN] = 1
-	newTermios.Cc[unix.VTIME] = 0
+	oldState := State{termios: *termios}
 
-	if err := unix.IoctlSetTermios(fd, unix.TCSETS, &newTermios); err != nil {
+	termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
+	termios.Oflag &^= unix.OPOST
+	termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
+	termios.Cflag &^= unix.CSIZE | unix.PARENB
+	termios.Cflag |= unix.CS8
+	termios.Cc[unix.VMIN] = 1
+	termios.Cc[unix.VTIME] = 0
+
+	if err := unix.IoctlSetTermios(fd, unix.TCSETS, termios); err != nil {
 		return nil, err
 	}
 
-	return &State{
-		state: oldTermiosPtr,
-	}, nil
+	return &oldState, nil
 }
 
 // Restore restores the terminal connected to the given file descriptor to a
 // previous state.
 func Restore(fd int, oldState *State) error {
-	return unix.IoctlSetTermios(fd, unix.TCSETS, oldState.state)
+	return unix.IoctlSetTermios(fd, unix.TCSETS, &oldState.termios)
 }
 
 // GetState returns the current state of a terminal which may be useful to
 // restore the terminal after a signal.
 func GetState(fd int) (*State, error) {
-	oldTermiosPtr, err := unix.IoctlGetTermios(fd, unix.TCGETS)
+	termios, err := unix.IoctlGetTermios(fd, unix.TCGETS)
 	if err != nil {
 		return nil, err
 	}
 
-	return &State{
-		state: oldTermiosPtr,
-	}, nil
+	return &State{termios: *termios}, nil
 }
 
 // GetSize returns the dimensions of the given terminal.

vendor/golang.org/x/crypto/ssh/terminal/util_windows.go

@@ -89,9 +89,7 @@ func ReadPassword(fd int) ([]byte, error) {
 		return nil, err
 	}
 
-	defer func() {
-		windows.SetConsoleMode(windows.Handle(fd), old)
-	}()
+	defer windows.SetConsoleMode(windows.Handle(fd), old)
 
 	var h windows.Handle
 	p, _ := windows.GetCurrentProcess()

vendor/golang.org/x/net/context/context.go

@@ -5,6 +5,8 @@
 // Package context defines the Context type, which carries deadlines,
 // cancelation signals, and other request-scoped values across API boundaries
 // and between processes.
+// As of Go 1.7 this package is available in the standard library under the
+// name context.  https://golang.org/pkg/context.
 //
 // Incoming requests to a server should create a Context, and outgoing calls to
 // servers should accept a Context. The chain of function calls between must

vendor/golang.org/x/net/http/httpguts/guts.go

@@ -0,0 +1,50 @@
+// Copyright 2018 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 httpguts provides functions implementing various details
+// of the HTTP specification.
+//
+// This package is shared by the standard library (which vendors it)
+// and x/net/http2. It comes with no API stability promise.
+package httpguts
+
+import (
+	"net/textproto"
+	"strings"
+)
+
+// ValidTrailerHeader reports whether name is a valid header field name to appear
+// in trailers.
+// See RFC 7230, Section 4.1.2
+func ValidTrailerHeader(name string) bool {
+	name = textproto.CanonicalMIMEHeaderKey(name)
+	if strings.HasPrefix(name, "If-") || badTrailer[name] {
+		return false
+	}
+	return true
+}
+
+var badTrailer = map[string]bool{
+	"Authorization":       true,
+	"Cache-Control":       true,
+	"Connection":          true,
+	"Content-Encoding":    true,
+	"Content-Length":      true,
+	"Content-Range":       true,
+	"Content-Type":        true,
+	"Expect":              true,
+	"Host":                true,
+	"Keep-Alive":          true,
+	"Max-Forwards":        true,
+	"Pragma":              true,
+	"Proxy-Authenticate":  true,
+	"Proxy-Authorization": true,
+	"Proxy-Connection":    true,
+	"Range":               true,
+	"Realm":               true,
+	"Te":                  true,
+	"Trailer":             true,
+	"Transfer-Encoding":   true,
+	"Www-Authenticate":    true,
+}

vendor/golang.org/x/net/http/httpguts/httplex.go

@@ -2,12 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package httplex contains rules around lexical matters of various
-// HTTP-related specifications.
-//
-// This package is shared by the standard library (which vendors it)
-// and x/net/http2. It comes with no API stability promise.
-package httplex
+package httpguts
 
 import (
 	"net"

vendor/golang.org/x/net/http2/ciphers.go

@@ -5,7 +5,7 @@
 package http2
 
 // A list of the possible cipher suite ids. Taken from
-// http://www.iana.org/assignments/tls-parameters/tls-parameters.txt
+// https://www.iana.org/assignments/tls-parameters/tls-parameters.txt
 
 const (
 	cipher_TLS_NULL_WITH_NULL_NULL               uint16 = 0x0000

vendor/golang.org/x/net/http2/client_conn_pool.go

@@ -52,9 +52,31 @@ const (
 	noDialOnMiss = false
 )
 
+// shouldTraceGetConn reports whether getClientConn should call any
+// ClientTrace.GetConn hook associated with the http.Request.
+//
+// This complexity is needed to avoid double calls of the GetConn hook
+// during the back-and-forth between net/http and x/net/http2 (when the
+// net/http.Transport is upgraded to also speak http2), as well as support
+// the case where x/net/http2 is being used directly.
+func (p *clientConnPool) shouldTraceGetConn(st clientConnIdleState) bool {
+	// If our Transport wasn't made via ConfigureTransport, always
+	// trace the GetConn hook if provided, because that means the
+	// http2 package is being used directly and it's the one
+	// dialing, as opposed to net/http.
+	if _, ok := p.t.ConnPool.(noDialClientConnPool); !ok {
+		return true
+	}
+	// Otherwise, only use the GetConn hook if this connection has
+	// been used previously for other requests. For fresh
+	// connections, the net/http package does the dialing.
+	return !st.freshConn
+}
+
 func (p *clientConnPool) getClientConn(req *http.Request, addr string, dialOnMiss bool) (*ClientConn, error) {
 	if isConnectionCloseRequest(req) && dialOnMiss {
 		// It gets its own connection.
+		traceGetConn(req, addr)
 		const singleUse = true
 		cc, err := p.t.dialClientConn(addr, singleUse)
 		if err != nil {
@@ -64,7 +86,10 @@ func (p *clientConnPool) getClientConn(req *http.Request, addr string, dialOnMis
 	}
 	p.mu.Lock()
 	for _, cc := range p.conns[addr] {
-		if cc.CanTakeNewRequest() {
+		if st := cc.idleState(); st.canTakeNewRequest {
+			if p.shouldTraceGetConn(st) {
+				traceGetConn(req, addr)
+			}
 			p.mu.Unlock()
 			return cc, nil
 		}
@@ -73,6 +98,7 @@ func (p *clientConnPool) getClientConn(req *http.Request, addr string, dialOnMis
 		p.mu.Unlock()
 		return nil, ErrNoCachedConn
 	}
+	traceGetConn(req, addr)
 	call := p.getStartDialLocked(addr)
 	p.mu.Unlock()
 	<-call.done

vendor/golang.org/x/net/http2/configure_transport.go

@@ -1,80 +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.
-
-// +build go1.6
-
-package http2
-
-import (
-	"crypto/tls"
-	"fmt"
-	"net/http"
-)
-
-func configureTransport(t1 *http.Transport) (*Transport, error) {
-	connPool := new(clientConnPool)
-	t2 := &Transport{
-		ConnPool: noDialClientConnPool{connPool},
-		t1:       t1,
-	}
-	connPool.t = t2
-	if err := registerHTTPSProtocol(t1, noDialH2RoundTripper{t2}); err != nil {
-		return nil, err
-	}
-	if t1.TLSClientConfig == nil {
-		t1.TLSClientConfig = new(tls.Config)
-	}
-	if !strSliceContains(t1.TLSClientConfig.NextProtos, "h2") {
-		t1.TLSClientConfig.NextProtos = append([]string{"h2"}, t1.TLSClientConfig.NextProtos...)
-	}
-	if !strSliceContains(t1.TLSClientConfig.NextProtos, "http/1.1") {
-		t1.TLSClientConfig.NextProtos = append(t1.TLSClientConfig.NextProtos, "http/1.1")
-	}
-	upgradeFn := func(authority string, c *tls.Conn) http.RoundTripper {
-		addr := authorityAddr("https", authority)
-		if used, err := connPool.addConnIfNeeded(addr, t2, c); err != nil {
-			go c.Close()
-			return erringRoundTripper{err}
-		} else if !used {
-			// Turns out we don't need this c.
-			// For example, two goroutines made requests to the same host
-			// at the same time, both kicking off TCP dials. (since protocol
-			// was unknown)
-			go c.Close()
-		}
-		return t2
-	}
-	if m := t1.TLSNextProto; len(m) == 0 {
-		t1.TLSNextProto = map[string]func(string, *tls.Conn) http.RoundTripper{
-			"h2": upgradeFn,
-		}
-	} else {
-		m["h2"] = upgradeFn
-	}
-	return t2, nil
-}
-
-// registerHTTPSProtocol calls Transport.RegisterProtocol but
-// converting panics into errors.
-func registerHTTPSProtocol(t *http.Transport, rt http.RoundTripper) (err error) {
-	defer func() {
-		if e := recover(); e != nil {
-			err = fmt.Errorf("%v", e)
-		}
-	}()
-	t.RegisterProtocol("https", rt)
-	return nil
-}
-
-// noDialH2RoundTripper is a RoundTripper which only tries to complete the request
-// if there's already has a cached connection to the host.
-type noDialH2RoundTripper struct{ t *Transport }
-
-func (rt noDialH2RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
-	res, err := rt.t.RoundTrip(req)
-	if err == ErrNoCachedConn {
-		return nil, http.ErrSkipAltProtocol
-	}
-	return res, err
-}

vendor/golang.org/x/net/http2/flow.go

@@ -41,10 +41,10 @@ func (f *flow) take(n int32) {
 // add adds n bytes (positive or negative) to the flow control window.
 // It returns false if the sum would exceed 2^31-1.
 func (f *flow) add(n int32) bool {
-	remain := (1<<31 - 1) - f.n
-	if n > remain {
-		return false
+	sum := f.n + n
+	if (sum > n) == (f.n > 0) {
+		f.n = sum
+		return true
 	}
-	f.n += n
-	return true
+	return false
 }

vendor/golang.org/x/net/http2/frame.go

@@ -14,8 +14,8 @@ import (
 	"strings"
 	"sync"
 
+	"golang.org/x/net/http/httpguts"
 	"golang.org/x/net/http2/hpack"
-	"golang.org/x/net/lex/httplex"
 )
 
 const frameHeaderLen = 9
@@ -733,32 +733,67 @@ func (f *SettingsFrame) IsAck() bool {
 	return f.FrameHeader.Flags.Has(FlagSettingsAck)
 }
 
-func (f *SettingsFrame) Value(s SettingID) (v uint32, ok bool) {
+func (f *SettingsFrame) Value(id SettingID) (v uint32, ok bool) {
 	f.checkValid()
-	buf := f.p
-	for len(buf) > 0 {
-		settingID := SettingID(binary.BigEndian.Uint16(buf[:2]))
-		if settingID == s {
-			return binary.BigEndian.Uint32(buf[2:6]), true
+	for i := 0; i < f.NumSettings(); i++ {
+		if s := f.Setting(i); s.ID == id {
+			return s.Val, true
 		}
-		buf = buf[6:]
 	}
 	return 0, false
 }
 
+// Setting returns the setting from the frame at the given 0-based index.
+// The index must be >= 0 and less than f.NumSettings().
+func (f *SettingsFrame) Setting(i int) Setting {
+	buf := f.p
+	return Setting{
+		ID:  SettingID(binary.BigEndian.Uint16(buf[i*6 : i*6+2])),
+		Val: binary.BigEndian.Uint32(buf[i*6+2 : i*6+6]),
+	}
+}
+
+func (f *SettingsFrame) NumSettings() int { return len(f.p) / 6 }
+
+// HasDuplicates reports whether f contains any duplicate setting IDs.
+func (f *SettingsFrame) HasDuplicates() bool {
+	num := f.NumSettings()
+	if num == 0 {
+		return false
+	}
+	// If it's small enough (the common case), just do the n^2
+	// thing and avoid a map allocation.
+	if num < 10 {
+		for i := 0; i < num; i++ {
+			idi := f.Setting(i).ID
+			for j := i + 1; j < num; j++ {
+				idj := f.Setting(j).ID
+				if idi == idj {
+					return true
+				}
+			}
+		}
+		return false
+	}
+	seen := map[SettingID]bool{}
+	for i := 0; i < num; i++ {
+		id := f.Setting(i).ID
+		if seen[id] {
+			return true
+		}
+		seen[id] = true
+	}
+	return false
+}
+
 // ForeachSetting runs fn for each setting.
 // It stops and returns the first error.
 func (f *SettingsFrame) ForeachSetting(fn func(Setting) error) error {
 	f.checkValid()
-	buf := f.p
-	for len(buf) > 0 {
-		if err := fn(Setting{
-			SettingID(binary.BigEndian.Uint16(buf[:2])),
-			binary.BigEndian.Uint32(buf[2:6]),
-		}); err != nil {
+	for i := 0; i < f.NumSettings(); i++ {
+		if err := fn(f.Setting(i)); err != nil {
 			return err
 		}
-		buf = buf[6:]
 	}
 	return nil
 }
@@ -1442,7 +1477,7 @@ func (fr *Framer) maxHeaderStringLen() int {
 }
 
 // readMetaFrame returns 0 or more CONTINUATION frames from fr and
-// merge them into into the provided hf and returns a MetaHeadersFrame
+// merge them into the provided hf and returns a MetaHeadersFrame
 // with the decoded hpack values.
 func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
 	if fr.AllowIllegalReads {
@@ -1462,7 +1497,7 @@ func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
 		if VerboseLogs && fr.logReads {
 			fr.debugReadLoggerf("http2: decoded hpack field %+v", hf)
 		}
-		if !httplex.ValidHeaderFieldValue(hf.Value) {
+		if !httpguts.ValidHeaderFieldValue(hf.Value) {
 			invalid = headerFieldValueError(hf.Value)
 		}
 		isPseudo := strings.HasPrefix(hf.Name, ":")

vendor/golang.org/x/net/http2/go111.go

@@ -0,0 +1,29 @@
+// Copyright 2018 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 go1.11
+
+package http2
+
+import (
+	"net/http/httptrace"
+	"net/textproto"
+)
+
+func traceHasWroteHeaderField(trace *httptrace.ClientTrace) bool {
+	return trace != nil && trace.WroteHeaderField != nil
+}
+
+func traceWroteHeaderField(trace *httptrace.ClientTrace, k, v string) {
+	if trace != nil && trace.WroteHeaderField != nil {
+		trace.WroteHeaderField(k, []string{v})
+	}
+}
+
+func traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textproto.MIMEHeader) error {
+	if trace != nil {
+		return trace.Got1xxResponse
+	}
+	return nil
+}

vendor/golang.org/x/net/http2/go16.go

@@ -1,16 +0,0 @@
-// Copyright 2016 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 go1.6
-
-package http2
-
-import (
-	"net/http"
-	"time"
-)
-
-func transportExpectContinueTimeout(t1 *http.Transport) time.Duration {
-	return t1.ExpectContinueTimeout
-}