forked from triggermesh/tm
/
client.go
163 lines (143 loc) · 4.1 KB
/
client.go
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/*
Copyright (c) 2018 TriggerMesh, 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 client
import (
"io/ioutil"
"log"
"os"
"path/filepath"
"github.com/ghodss/yaml"
buildApi "github.com/knative/build/pkg/client/clientset/versioned"
eventSourcesApi "github.com/knative/eventing-sources/pkg/client/clientset/versioned"
eventingApi "github.com/knative/eventing/pkg/client/clientset/versioned"
servingApi "github.com/knative/serving/pkg/client/clientset/versioned"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
// gcp package is required for kubectl configs with GCP auth providers
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
)
const (
confPath = "/.tm/config.json"
)
var (
Namespace string
Registry string
Output string
Debug bool
Dry bool
Wait bool
)
// ConfigSet contains different information that may be needed by underlying functions
type ConfigSet struct {
Core *kubernetes.Clientset
Build *buildApi.Clientset
Serving *servingApi.Clientset
Eventing *eventingApi.Clientset
EventSources *eventSourcesApi.Clientset
Config *rest.Config
}
type config struct {
Contexts []struct {
Name string
Context struct {
Namespace string
}
}
CurrentContext string `json:"current-context"`
}
func getNamespace(kubeCfgFile string) string {
namespace := "default"
data, err := ioutil.ReadFile(kubeCfgFile)
if err != nil {
log.Printf("Can't read config file: %s\n", err)
return namespace
}
var c config
if err := yaml.Unmarshal(data, &c); err != nil {
log.Printf("Can't parse config body: %s\n", err)
return namespace
}
for _, context := range c.Contexts {
if context.Name == c.CurrentContext {
if context.Context.Namespace != "" {
namespace = context.Context.Namespace
}
break
}
}
return namespace
}
func getInClusterNamespace() string {
data, err := ioutil.ReadFile("/run/secrets/kubernetes.io/serviceaccount/namespace")
if err != nil {
return "default"
}
return string(data)
}
func ConfigPath(cfgFile string) string {
homeDir := "."
if dir := os.Getenv("HOME"); dir != "" {
homeDir = dir
}
tmHome := filepath.Dir(homeDir + confPath)
if _, err := os.Stat(tmHome); os.IsNotExist(err) {
if err := os.MkdirAll(tmHome, 0755); err != nil {
log.Fatalln(err)
}
}
kubeconfig := os.Getenv("KUBECONFIG")
if len(cfgFile) != 0 {
// using config file passed with --config argument
} else if _, err := os.Stat(homeDir + confPath); err == nil {
cfgFile = homeDir + confPath
} else if _, err := os.Stat(kubeconfig); err == nil {
cfgFile = kubeconfig
} else {
cfgFile = homeDir + "/.kube/config"
}
return cfgFile
}
// NewClient returns ConfigSet created from available configuration file or from in-cluster environment
func NewClient(cfgFile string) (ConfigSet, error) {
var c ConfigSet
config, err := clientcmd.BuildConfigFromFlags("", cfgFile)
if err != nil {
log.Printf("%s, falling back to in-cluster configuration\n", err)
if config, err = rest.InClusterConfig(); err != nil {
return c, err
}
if len(Namespace) == 0 {
Namespace = getInClusterNamespace()
}
} else if len(Namespace) == 0 {
Namespace = getNamespace(cfgFile)
}
c.Config = config
if c.Eventing, err = eventingApi.NewForConfig(config); err != nil {
return c, err
}
if c.Build, err = buildApi.NewForConfig(config); err != nil {
return c, err
}
if c.Serving, err = servingApi.NewForConfig(config); err != nil {
return c, err
}
if c.Core, err = kubernetes.NewForConfig(config); err != nil {
return c, err
}
if c.EventSources, err = eventSourcesApi.NewForConfig(config); err != nil {
return c, err
}
return c, nil
}