/
client.go
81 lines (69 loc) · 2.04 KB
/
client.go
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package client
import (
"flag"
"fmt"
"os"
"path/filepath"
"strings"
"sync"
corebeta1 "github.com/openfunction/apis/core/v1beta1"
"k8s.io/cli-runtime/pkg/genericclioptions"
k8s "k8s.io/client-go/kubernetes"
scheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/util/homedir"
)
const (
kubeConfigDelimiter = ":"
)
// NewKubeConfigClient returns the kubeconfig and the client created from the kubeconfig.
func NewKubeConfigClient(cf *genericclioptions.ConfigFlags) (*rest.Config, *k8s.Clientset, error) {
config, err := cf.ToRESTConfig()
if err != nil {
return nil, nil, err
}
client, err := k8s.NewForConfig(config)
if err != nil {
return config, nil, err
}
return config, client, nil
}
func SetConfigDefaults(config *rest.Config) error {
gv := corebeta1.GroupVersion
config.GroupVersion = &gv
config.APIPath = "/apis"
config.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
if config.UserAgent == "" {
config.UserAgent = rest.DefaultKubernetesUserAgent()
}
return nil
}
func getConfig() (*rest.Config, error) {
var (
doOnce sync.Once
kubeconfig *string
)
if home := homedir.HomeDir(); home != "" {
kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
} else {
kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
}
doOnce.Do(func() {
flag.Parse()
})
kubeConfigEnv := os.Getenv("KUBECONFIG")
delimiterBelongsToPath := strings.Count(*kubeconfig, kubeConfigDelimiter) == 1 && strings.EqualFold(*kubeconfig, kubeConfigEnv)
if len(kubeConfigEnv) != 0 && !delimiterBelongsToPath {
kubeConfigs := strings.Split(kubeConfigEnv, kubeConfigDelimiter)
if len(kubeConfigs) > 1 {
return nil, fmt.Errorf("multiple kubeconfigs in KUBECONFIG environment variable - %s", kubeConfigEnv)
}
kubeconfig = &kubeConfigs[0]
}
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
return nil, err
}
return config, nil
}