1 files changed, 472 insertions, 0 deletions
diff --git a/kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/client/unversioned/clientcmd/config.go b/kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/client/unversioned/clientcmd/config.go
new file mode 100644
index 0000000..9df69a7
--- /dev/null
+++ b/kube2msb/src/kube2msb/vendor/k8s.io/kubernetes/pkg/client/unversioned/clientcmd/config.go
@@ -0,0 +1,472 @@
+/*
+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 clientcmd
+
+import (
+	"errors"
+	"os"
+	"path"
+	"path/filepath"
+	"reflect"
+	"sort"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/client/restclient"
+	clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
+)
+
+// ConfigAccess is used by subcommands and methods in this package to load and modify the appropriate config files
+type ConfigAccess interface {
+	// GetLoadingPrecedence returns the slice of files that should be used for loading and inspecting the config
+	GetLoadingPrecedence() []string
+	// GetStartingConfig returns the config that subcommands should being operating against.  It may or may not be merged depending on loading rules
+	GetStartingConfig() (*clientcmdapi.Config, error)
+	// GetDefaultFilename returns the name of the file you should write into (create if necessary), if you're trying to create a new stanza as opposed to updating an existing one.
+	GetDefaultFilename() string
+	// IsExplicitFile indicates whether or not this command is interested in exactly one file.  This implementation only ever does that  via a flag, but implementations that handle local, global, and flags may have more
+	IsExplicitFile() bool
+	// GetExplicitFile returns the particular file this command is operating against.  This implementation only ever has one, but implementations that handle local, global, and flags may have more
+	GetExplicitFile() string
+}
+
+type PathOptions struct {
+	// GlobalFile is the full path to the file to load as the global (final) option
+	GlobalFile string
+	// EnvVar is the env var name that points to the list of kubeconfig files to load
+	EnvVar string
+	// ExplicitFileFlag is the name of the flag to use for prompting for the kubeconfig file
+	ExplicitFileFlag string
+
+	// GlobalFileSubpath is an optional value used for displaying help
+	GlobalFileSubpath string
+
+	LoadingRules *ClientConfigLoadingRules
+}
+
+func (o *PathOptions) GetEnvVarFiles() []string {
+	if len(o.EnvVar) == 0 {
+		return []string{}
+	}
+
+	envVarValue := os.Getenv(o.EnvVar)
+	if len(envVarValue) == 0 {
+		return []string{}
+	}
+
+	return filepath.SplitList(envVarValue)
+}
+
+func (o *PathOptions) GetLoadingPrecedence() []string {
+	if envVarFiles := o.GetEnvVarFiles(); len(envVarFiles) > 0 {
+		return envVarFiles
+	}
+
+	return []string{o.GlobalFile}
+}
+
+func (o *PathOptions) GetStartingConfig() (*clientcmdapi.Config, error) {
+	// don't mutate the original
+	loadingRules := *o.LoadingRules
+	loadingRules.Precedence = o.GetLoadingPrecedence()
+
+	clientConfig := NewNonInteractiveDeferredLoadingClientConfig(&loadingRules, &ConfigOverrides{})
+	rawConfig, err := clientConfig.RawConfig()
+	if os.IsNotExist(err) {
+		return clientcmdapi.NewConfig(), nil
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	return &rawConfig, nil
+}
+
+func (o *PathOptions) GetDefaultFilename() string {
+	if o.IsExplicitFile() {
+		return o.GetExplicitFile()
+	}
+
+	if envVarFiles := o.GetEnvVarFiles(); len(envVarFiles) > 0 {
+		if len(envVarFiles) == 1 {
+			return envVarFiles[0]
+		}
+
+		// if any of the envvar files already exists, return it
+		for _, envVarFile := range envVarFiles {
+			if _, err := os.Stat(envVarFile); err == nil {
+				return envVarFile
+			}
+		}
+
+		// otherwise, return the last one in the list
+		return envVarFiles[len(envVarFiles)-1]
+	}
+
+	return o.GlobalFile
+}
+
+func (o *PathOptions) IsExplicitFile() bool {
+	if len(o.LoadingRules.ExplicitPath) > 0 {
+		return true
+	}
+
+	return false
+}
+
+func (o *PathOptions) GetExplicitFile() string {
+	return o.LoadingRules.ExplicitPath
+}
+
+func NewDefaultPathOptions() *PathOptions {
+	ret := &PathOptions{
+		GlobalFile:       RecommendedHomeFile,
+		EnvVar:           RecommendedConfigPathEnvVar,
+		ExplicitFileFlag: RecommendedConfigPathFlag,
+
+		GlobalFileSubpath: path.Join(RecommendedHomeDir, RecommendedFileName),
+
+		LoadingRules: NewDefaultClientConfigLoadingRules(),
+	}
+	ret.LoadingRules.DoNotResolvePaths = true
+
+	return ret
+}
+
+// ModifyConfig takes a Config object, iterates through Clusters, AuthInfos, and Contexts, uses the LocationOfOrigin if specified or
+// uses the default destination file to write the results into.  This results in multiple file reads, but it's very easy to follow.
+// Preferences and CurrentContext should always be set in the default destination file.  Since we can't distinguish between empty and missing values
+// (no nil strings), we're forced have separate handling for them.  In the kubeconfig cases, newConfig should have at most one difference,
+// that means that this code will only write into a single file.  If you want to relativizePaths, you must provide a fully qualified path in any
+// modified element.
+func ModifyConfig(configAccess ConfigAccess, newConfig clientcmdapi.Config, relativizePaths bool) error {
+	possibleSources := configAccess.GetLoadingPrecedence()
+	// sort the possible kubeconfig files so we always "lock" in the same order
+	// to avoid deadlock (note: this can fail w/ symlinks, but... come on).
+	sort.Strings(possibleSources)
+	for _, filename := range possibleSources {
+		if err := lockFile(filename); err != nil {
+			return err
+		}
+		defer unlockFile(filename)
+	}
+
+	startingConfig, err := configAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+
+	// We need to find all differences, locate their original files, read a partial config to modify only that stanza and write out the file.
+	// Special case the test for current context and preferences since those always write to the default file.
+	if reflect.DeepEqual(*startingConfig, newConfig) {
+		// nothing to do
+		return nil
+	}
+
+	if startingConfig.CurrentContext != newConfig.CurrentContext {
+		if err := writeCurrentContext(configAccess, newConfig.CurrentContext); err != nil {
+			return err
+		}
+	}
+
+	if !reflect.DeepEqual(startingConfig.Preferences, newConfig.Preferences) {
+		if err := writePreferences(configAccess, newConfig.Preferences); err != nil {
+			return err
+		}
+	}
+
+	// Search every cluster, authInfo, and context.  First from new to old for differences, then from old to new for deletions
+	for key, cluster := range newConfig.Clusters {
+		startingCluster, exists := startingConfig.Clusters[key]
+		if !reflect.DeepEqual(cluster, startingCluster) || !exists {
+			destinationFile := cluster.LocationOfOrigin
+			if len(destinationFile) == 0 {
+				destinationFile = configAccess.GetDefaultFilename()
+			}
+
+			configToWrite, err := getConfigFromFile(destinationFile)
+			if err != nil {
+				return err
+			}
+			t := *cluster
+
+			configToWrite.Clusters[key] = &t
+			configToWrite.Clusters[key].LocationOfOrigin = destinationFile
+			if relativizePaths {
+				if err := RelativizeClusterLocalPaths(configToWrite.Clusters[key]); err != nil {
+					return err
+				}
+			}
+
+			if err := WriteToFile(*configToWrite, destinationFile); err != nil {
+				return err
+			}
+		}
+	}
+
+	for key, context := range newConfig.Contexts {
+		startingContext, exists := startingConfig.Contexts[key]
+		if !reflect.DeepEqual(context, startingContext) || !exists {
+			destinationFile := context.LocationOfOrigin
+			if len(destinationFile) == 0 {
+				destinationFile = configAccess.GetDefaultFilename()
+			}
+
+			configToWrite, err := getConfigFromFile(destinationFile)
+			if err != nil {
+				return err
+			}
+			configToWrite.Contexts[key] = context
+
+			if err := WriteToFile(*configToWrite, destinationFile); err != nil {
+				return err
+			}
+		}
+	}
+
+	for key, authInfo := range newConfig.AuthInfos {
+		startingAuthInfo, exists := startingConfig.AuthInfos[key]
+		if !reflect.DeepEqual(authInfo, startingAuthInfo) || !exists {
+			destinationFile := authInfo.LocationOfOrigin
+			if len(destinationFile) == 0 {
+				destinationFile = configAccess.GetDefaultFilename()
+			}
+
+			configToWrite, err := getConfigFromFile(destinationFile)
+			if err != nil {
+				return err
+			}
+			t := *authInfo
+			configToWrite.AuthInfos[key] = &t
+			configToWrite.AuthInfos[key].LocationOfOrigin = destinationFile
+			if relativizePaths {
+				if err := RelativizeAuthInfoLocalPaths(configToWrite.AuthInfos[key]); err != nil {
+					return err
+				}
+			}
+
+			if err := WriteToFile(*configToWrite, destinationFile); err != nil {
+				return err
+			}
+		}
+	}
+
+	for key, cluster := range startingConfig.Clusters {
+		if _, exists := newConfig.Clusters[key]; !exists {
+			destinationFile := cluster.LocationOfOrigin
+			if len(destinationFile) == 0 {
+				destinationFile = configAccess.GetDefaultFilename()
+			}
+
+			configToWrite, err := getConfigFromFile(destinationFile)
+			if err != nil {
+				return err
+			}
+			delete(configToWrite.Clusters, key)
+
+			if err := WriteToFile(*configToWrite, destinationFile); err != nil {
+				return err
+			}
+		}
+	}
+
+	for key, context := range startingConfig.Contexts {
+		if _, exists := newConfig.Contexts[key]; !exists {
+			destinationFile := context.LocationOfOrigin
+			if len(destinationFile) == 0 {
+				destinationFile = configAccess.GetDefaultFilename()
+			}
+
+			configToWrite, err := getConfigFromFile(destinationFile)
+			if err != nil {
+				return err
+			}
+			delete(configToWrite.Contexts, key)
+
+			if err := WriteToFile(*configToWrite, destinationFile); err != nil {
+				return err
+			}
+		}
+	}
+
+	for key, authInfo := range startingConfig.AuthInfos {
+		if _, exists := newConfig.AuthInfos[key]; !exists {
+			destinationFile := authInfo.LocationOfOrigin
+			if len(destinationFile) == 0 {
+				destinationFile = configAccess.GetDefaultFilename()
+			}
+
+			configToWrite, err := getConfigFromFile(destinationFile)
+			if err != nil {
+				return err
+			}
+			delete(configToWrite.AuthInfos, key)
+
+			if err := WriteToFile(*configToWrite, destinationFile); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func PersisterForUser(configAccess ConfigAccess, user string) restclient.AuthProviderConfigPersister {
+	return &persister{configAccess, user}
+}
+
+type persister struct {
+	configAccess ConfigAccess
+	user         string
+}
+
+func (p *persister) Persist(config map[string]string) error {
+	newConfig, err := p.configAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+	authInfo, ok := newConfig.AuthInfos[p.user]
+	if ok && authInfo.AuthProvider != nil {
+		authInfo.AuthProvider.Config = config
+		ModifyConfig(p.configAccess, *newConfig, false)
+	}
+	return nil
+}
+
+// writeCurrentContext takes three possible paths.
+// If newCurrentContext is the same as the startingConfig's current context, then we exit.
+// If newCurrentContext has a value, then that value is written into the default destination file.
+// If newCurrentContext is empty, then we find the config file that is setting the CurrentContext and clear the value from that file
+func writeCurrentContext(configAccess ConfigAccess, newCurrentContext string) error {
+	if startingConfig, err := configAccess.GetStartingConfig(); err != nil {
+		return err
+	} else if startingConfig.CurrentContext == newCurrentContext {
+		return nil
+	}
+
+	if configAccess.IsExplicitFile() {
+		file := configAccess.GetExplicitFile()
+		currConfig, err := getConfigFromFile(file)
+		if err != nil {
+			return err
+		}
+		currConfig.CurrentContext = newCurrentContext
+		if err := WriteToFile(*currConfig, file); err != nil {
+			return err
+		}
+
+		return nil
+	}
+
+	if len(newCurrentContext) > 0 {
+		destinationFile := configAccess.GetDefaultFilename()
+		config, err := getConfigFromFile(destinationFile)
+		if err != nil {
+			return err
+		}
+		config.CurrentContext = newCurrentContext
+
+		if err := WriteToFile(*config, destinationFile); err != nil {
+			return err
+		}
+
+		return nil
+	}
+
+	// we're supposed to be clearing the current context.  We need to find the first spot in the chain that is setting it and clear it
+	for _, file := range configAccess.GetLoadingPrecedence() {
+		if _, err := os.Stat(file); err == nil {
+			currConfig, err := getConfigFromFile(file)
+			if err != nil {
+				return err
+			}
+
+			if len(currConfig.CurrentContext) > 0 {
+				currConfig.CurrentContext = newCurrentContext
+				if err := WriteToFile(*currConfig, file); err != nil {
+					return err
+				}
+
+				return nil
+			}
+		}
+	}
+
+	return errors.New("no config found to write context")
+}
+
+func writePreferences(configAccess ConfigAccess, newPrefs clientcmdapi.Preferences) error {
+	if startingConfig, err := configAccess.GetStartingConfig(); err != nil {
+		return err
+	} else if reflect.DeepEqual(startingConfig.Preferences, newPrefs) {
+		return nil
+	}
+
+	if configAccess.IsExplicitFile() {
+		file := configAccess.GetExplicitFile()
+		currConfig, err := getConfigFromFile(file)
+		if err != nil {
+			return err
+		}
+		currConfig.Preferences = newPrefs
+		if err := WriteToFile(*currConfig, file); err != nil {
+			return err
+		}
+
+		return nil
+	}
+
+	for _, file := range configAccess.GetLoadingPrecedence() {
+		currConfig, err := getConfigFromFile(file)
+		if err != nil {
+			return err
+		}
+
+		if !reflect.DeepEqual(currConfig.Preferences, newPrefs) {
+			currConfig.Preferences = newPrefs
+			if err := WriteToFile(*currConfig, file); err != nil {
+				return err
+			}
+
+			return nil
+		}
+	}
+
+	return errors.New("no config found to write preferences")
+}
+
+// getConfigFromFile tries to read a kubeconfig file and if it can't, returns an error.  One exception, missing files result in empty configs, not an error.
+func getConfigFromFile(filename string) (*clientcmdapi.Config, error) {
+	config, err := LoadFromFile(filename)
+	if err != nil && !os.IsNotExist(err) {
+		return nil, err
+	}
+	if config == nil {
+		config = clientcmdapi.NewConfig()
+	}
+	return config, nil
+}
+
+// GetConfigFromFileOrDie tries to read a kubeconfig file and if it can't, it calls exit.  One exception, missing files result in empty configs, not an exit
+func GetConfigFromFileOrDie(filename string) *clientcmdapi.Config {
+	config, err := getConfigFromFile(filename)
+	if err != nil {
+		glog.FatalDepth(1, err)
+	}
+
+	return config
+}