Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/kubectl/plugins/loader.go

@@ -0,0 +1,204 @@
+/*
+Copyright 2017 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 plugins
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/ghodss/yaml"
+	"github.com/golang/glog"
+
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+// PluginDescriptorFilename is the default file name for plugin descriptions.
+const PluginDescriptorFilename = "plugin.yaml"
+
+// PluginLoader is capable of loading a list of plugin descriptions.
+type PluginLoader interface {
+	// Load loads the plugin descriptions.
+	Load() (Plugins, error)
+}
+
+// DirectoryPluginLoader is a PluginLoader that loads plugin descriptions
+// from a given directory in the filesystem. Plugins are located in subdirs
+// under the loader "root", where each subdir must contain, at least, a plugin
+// descriptor file called "plugin.yaml" that translates into a PluginDescription.
+type DirectoryPluginLoader struct {
+	Directory string
+}
+
+// Load reads the directory the loader holds and loads plugin descriptions.
+func (l *DirectoryPluginLoader) Load() (Plugins, error) {
+	if len(l.Directory) == 0 {
+		return nil, fmt.Errorf("directory not specified")
+	}
+
+	list := Plugins{}
+
+	stat, err := os.Stat(l.Directory)
+	if err != nil {
+		return nil, err
+	}
+	if !stat.IsDir() {
+		return nil, fmt.Errorf("not a directory: %s", l.Directory)
+	}
+
+	base, err := filepath.Abs(l.Directory)
+	if err != nil {
+		return nil, err
+	}
+
+	// read the base directory tree searching for plugin descriptors
+	// fails silently (descriptors unable to be read or unmarshalled are logged but skipped)
+	err = filepath.Walk(base, func(path string, fileInfo os.FileInfo, walkErr error) error {
+		if walkErr != nil || fileInfo.IsDir() || fileInfo.Name() != PluginDescriptorFilename {
+			return nil
+		}
+
+		file, err := ioutil.ReadFile(path)
+		if err != nil {
+			glog.V(1).Infof("Unable to read plugin descriptor %s: %v", path, err)
+			return nil
+		}
+
+		plugin := &Plugin{}
+		if err := yaml.Unmarshal(file, plugin); err != nil {
+			glog.V(1).Infof("Unable to unmarshal plugin descriptor %s: %v", path, err)
+			return nil
+		}
+
+		if err := plugin.Validate(); err != nil {
+			glog.V(1).Infof("%v", err)
+			return nil
+		}
+
+		var setSource func(path string, fileInfo os.FileInfo, p *Plugin)
+		setSource = func(path string, fileInfo os.FileInfo, p *Plugin) {
+			p.Dir = filepath.Dir(path)
+			p.DescriptorName = fileInfo.Name()
+			for _, child := range p.Tree {
+				setSource(path, fileInfo, child)
+			}
+		}
+		setSource(path, fileInfo, plugin)
+
+		glog.V(6).Infof("Plugin loaded: %s", plugin.Name)
+		list = append(list, plugin)
+
+		return nil
+	})
+
+	return list, err
+}
+
+// UserDirPluginLoader returns a PluginLoader that loads plugins from the
+// "plugins" directory under the user's kubeconfig dir (usually "~/.kube/plugins/").
+func UserDirPluginLoader() PluginLoader {
+	dir := filepath.Join(clientcmd.RecommendedConfigDir, "plugins")
+	return &DirectoryPluginLoader{
+		Directory: dir,
+	}
+}
+
+// PathFromEnvVarPluginLoader returns a PluginLoader that loads plugins from one or more
+// directories specified by the provided env var name. In case the env var is not
+// set, the PluginLoader just loads nothing. A list of subdirectories can be provided,
+// which will be appended to each path specified by the env var.
+func PathFromEnvVarPluginLoader(envVarName string, subdirs ...string) PluginLoader {
+	env := os.Getenv(envVarName)
+	if len(env) == 0 {
+		return &DummyPluginLoader{}
+	}
+	loader := MultiPluginLoader{}
+	for _, path := range filepath.SplitList(env) {
+		dir := append([]string{path}, subdirs...)
+		loader = append(loader, &DirectoryPluginLoader{
+			Directory: filepath.Join(dir...),
+		})
+	}
+	return loader
+}
+
+// KubectlPluginsPathPluginLoader returns a PluginLoader that loads plugins from one or more
+// directories specified by the KUBECTL_PLUGINS_PATH env var.
+func KubectlPluginsPathPluginLoader() PluginLoader {
+	return PathFromEnvVarPluginLoader("KUBECTL_PLUGINS_PATH")
+}
+
+// XDGDataDirsPluginLoader returns a PluginLoader that loads plugins from one or more
+// directories specified by the XDG system directory structure spec in the
+// XDG_DATA_DIRS env var, plus the "kubectl/plugins/" suffix. According to the
+// spec, if XDG_DATA_DIRS is not set it defaults to "/usr/local/share:/usr/share".
+func XDGDataDirsPluginLoader() PluginLoader {
+	envVarName := "XDG_DATA_DIRS"
+	if len(os.Getenv(envVarName)) > 0 {
+		return PathFromEnvVarPluginLoader(envVarName, "kubectl", "plugins")
+	}
+	return TolerantMultiPluginLoader{
+		&DirectoryPluginLoader{
+			Directory: "/usr/local/share/kubectl/plugins",
+		},
+		&DirectoryPluginLoader{
+			Directory: "/usr/share/kubectl/plugins",
+		},
+	}
+}
+
+// MultiPluginLoader is a PluginLoader that can encapsulate multiple plugin loaders,
+// a successful loading means every encapsulated loader was able to load without errors.
+type MultiPluginLoader []PluginLoader
+
+// Load calls Load() for each of the encapsulated Loaders.
+func (l MultiPluginLoader) Load() (Plugins, error) {
+	plugins := Plugins{}
+	for _, loader := range l {
+		loaded, err := loader.Load()
+		if err != nil {
+			return nil, err
+		}
+		plugins = append(plugins, loaded...)
+	}
+	return plugins, nil
+}
+
+// TolerantMultiPluginLoader is a PluginLoader than encapsulates multiple plugins loaders,
+// but is tolerant to errors while loading from them.
+type TolerantMultiPluginLoader []PluginLoader
+
+// Load calls Load() for each of the encapsulated Loaders.
+func (l TolerantMultiPluginLoader) Load() (Plugins, error) {
+	plugins := Plugins{}
+	for _, loader := range l {
+		loaded, _ := loader.Load()
+		if loaded != nil {
+			plugins = append(plugins, loaded...)
+		}
+	}
+	return plugins, nil
+}
+
+// DummyPluginLoader is a noop PluginLoader.
+type DummyPluginLoader struct{}
+
+// Load loads nothing.
+func (l *DummyPluginLoader) Load() (Plugins, error) {
+	return Plugins{}, nil
+}