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kubeconfig.go
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kubeconfig.go
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// Copyright 2022 Namespace Labs 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.
package kubectl
import (
"context"
"os"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/workspace/dirs"
)
type Kubeconfig struct {
Kubeconfig string
Context string
Namespace string
keepConfig bool
}
func WriteRawKubeconfig(ctx context.Context, rawConfig clientcmdapi.Config, keepConfig bool) (*Kubeconfig, error) {
configBytes, err := clientcmd.Write(rawConfig)
if err != nil {
return nil, fnerrors.New("failed to serialize kubeconfig: %w", err)
}
return WriteKubeconfig(ctx, configBytes, keepConfig)
}
func WriteKubeconfig(ctx context.Context, configBytes []byte, keepConfig bool) (*Kubeconfig, error) {
tmpFile, err := dirs.CreateUserTemp("kubeconfig", "*.yaml")
if err != nil {
return nil, fnerrors.New("failed to create temp file: %w", err)
}
if _, err := tmpFile.Write(configBytes); err != nil {
return nil, fnerrors.New("failed to write kubeconfig: %w", err)
}
if err := tmpFile.Close(); err != nil {
return nil, fnerrors.New("failed to close kubeconfig: %w", err)
}
return &Kubeconfig{
Kubeconfig: tmpFile.Name(),
keepConfig: keepConfig,
}, nil
}
func (kc *Kubeconfig) BaseArgs() []string {
baseArgs := []string{
"--kubeconfig=" + kc.Kubeconfig,
}
if kc.Namespace != "" {
baseArgs = append(baseArgs, "-n", kc.Namespace)
}
if kc.Context != "" {
baseArgs = append(baseArgs, "--context", kc.Context)
}
return baseArgs
}
func (kc *Kubeconfig) Cleanup() error {
if kc.keepConfig {
return nil
}
return os.Remove(kc.Kubeconfig)
}