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/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// A set of common functions needed by cmd/kubectl and pkg/kubectl packages.
package kubectl
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"reflect"
"strings"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/version"
)
var apiVersionToUse = "v1beta1"
func GetKubeClient(config *client.Config, matchVersion bool) (*client.Client, error) {
// TODO: get the namespace context when kubectl ns is completed
c, err := client.New(config)
if err != nil {
return nil, err
}
if matchVersion {
clientVersion := version.Get()
serverVersion, err := c.ServerVersion()
if err != nil {
return nil, fmt.Errorf("couldn't read version from server: %v\n", err)
}
if s := *serverVersion; !reflect.DeepEqual(clientVersion, s) {
return nil, fmt.Errorf("server version (%#v) differs from client version (%#v)!\n", s, clientVersion)
}
}
return c, nil
}
type NamespaceInfo struct {
Namespace string
}
// LoadNamespaceInfo parses a NamespaceInfo object from a file path. It creates a file at the specified path if it doesn't exist with the default namespace.
func LoadNamespaceInfo(path string) (*NamespaceInfo, error) {
var ns NamespaceInfo
if _, err := os.Stat(path); os.IsNotExist(err) {
ns.Namespace = api.NamespaceDefault
err = SaveNamespaceInfo(path, &ns)
return &ns, err
}
data, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
err = json.Unmarshal(data, &ns)
if err != nil {
return nil, err
}
return &ns, err
}
// SaveNamespaceInfo saves a NamespaceInfo object at the specified file path.
func SaveNamespaceInfo(path string, ns *NamespaceInfo) error {
if !util.IsDNSLabel(ns.Namespace) {
return fmt.Errorf("namespace %s is not a valid DNS Label", ns.Namespace)
}
data, err := json.Marshal(ns)
err = ioutil.WriteFile(path, data, 0600)
return err
}
// TODO Move to labels package.
func formatLabels(labelMap map[string]string) string {
l := labels.Set(labelMap).String()
if l == "" {
l = "<none>"
}
return l
}
func listOfImages(spec *api.PodSpec) []string {
var images []string
for _, container := range spec.Containers {
images = append(images, container.Image)
}
return images
}
func makeImageList(spec *api.PodSpec) string {
return strings.Join(listOfImages(spec), ",")
}
// ExpandResourceShortcut will return the expanded version of resource
// (something that a pkg/api/meta.RESTMapper can understand), if it is
// indeed a shortcut. Otherwise, will return resource unmodified.
// TODO: Combine with RESTMapper stuff to provide a general solution
// to this problem.
func ExpandResourceShortcut(resource string) string {
shortForms := map[string]string{
"po": "pods",
"rc": "replicationcontrollers",
"se": "services",
"mi": "minions",
"ev": "events",
}
if expanded, ok := shortForms[resource]; ok {
return expanded
}
return resource
}
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