Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/admission/plugins.go

@@ -0,0 +1,147 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+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 admission
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"os"
+	"reflect"
+	"sort"
+	"sync"
+
+	"github.com/golang/glog"
+
+	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
+)
+
+// Factory is a function that returns an Interface for admission decisions.
+// The config parameter provides an io.Reader handler to the factory in
+// order to load specific configurations. If no configuration is provided
+// the parameter is nil.
+type Factory func(client clientset.Interface, config io.Reader) (Interface, error)
+
+// All registered admission options.
+var (
+	pluginsMutex sync.Mutex
+	plugins      = make(map[string]Factory)
+
+	// PluginEnabledFn checks whether a plugin is enabled.  By default, if you ask about it, it's enabled.
+	PluginEnabledFn = func(name string, config io.Reader) bool {
+		return true
+	}
+)
+
+// PluginEnabledFunc is a function type that can provide an external check on whether an admission plugin may be enabled
+type PluginEnabledFunc func(name string, config io.Reader) bool
+
+// GetPlugins enumerates the names of all registered plugins.
+func GetPlugins() []string {
+	pluginsMutex.Lock()
+	defer pluginsMutex.Unlock()
+	keys := []string{}
+	for k := range plugins {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	return keys
+}
+
+// RegisterPlugin registers a plugin Factory by name. This
+// is expected to happen during app startup.
+func RegisterPlugin(name string, plugin Factory) {
+	pluginsMutex.Lock()
+	defer pluginsMutex.Unlock()
+	_, found := plugins[name]
+	if found {
+		glog.Fatalf("Admission plugin %q was registered twice", name)
+	}
+	glog.V(1).Infof("Registered admission plugin %q", name)
+	plugins[name] = plugin
+}
+
+// getPlugin creates an instance of the named plugin.  It returns `false` if the
+// the name is not known. The error is returned only when the named provider was
+// known but failed to initialize.  The config parameter specifies the io.Reader
+// handler of the configuration file for the cloud provider, or nil for no configuration.
+func getPlugin(name string, client clientset.Interface, config io.Reader) (Interface, bool, error) {
+	pluginsMutex.Lock()
+	defer pluginsMutex.Unlock()
+	f, found := plugins[name]
+	if !found {
+		return nil, false, nil
+	}
+
+	config1, config2, err := splitStream(config)
+	if err != nil {
+		return nil, true, err
+	}
+	if !PluginEnabledFn(name, config1) {
+		return nil, true, nil
+	}
+
+	ret, err := f(client, config2)
+	return ret, true, err
+}
+
+// splitStream reads the stream bytes and constructs two copies of it.
+func splitStream(config io.Reader) (io.Reader, io.Reader, error) {
+	if config == nil || reflect.ValueOf(config).IsNil() {
+		return nil, nil, nil
+	}
+
+	configBytes, err := ioutil.ReadAll(config)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return bytes.NewBuffer(configBytes), bytes.NewBuffer(configBytes), nil
+}
+
+// InitPlugin creates an instance of the named interface.
+func InitPlugin(name string, client clientset.Interface, configFilePath string) Interface {
+	var (
+		config *os.File
+		err    error
+	)
+
+	if name == "" {
+		glog.Info("No admission plugin specified.")
+		return nil
+	}
+
+	if configFilePath != "" {
+		config, err = os.Open(configFilePath)
+		if err != nil {
+			glog.Fatalf("Couldn't open admission plugin configuration %s: %#v",
+				configFilePath, err)
+		}
+
+		defer config.Close()
+	}
+
+	plugin, found, err := getPlugin(name, client, config)
+	if err != nil {
+		glog.Fatalf("Couldn't init admission plugin %q: %v", name, err)
+	}
+	if !found {
+		glog.Fatalf("Unknown admission plugin: %s", name)
+	}
+
+	return plugin
+}