fix(pkg/cli): ensure correct configuration from kubeconfig file

Bind Helm flags to Kubernetes configuration loader to get a merged
config with kubeconfig.

Fixes: #7539

Signed-off-by: Adam Reese <adam@reese.io>

cmd/helm/helm.go

@@ -43,9 +43,7 @@ import (
 // FeatureGateOCI is the feature gate for checking if `helm chart` and `helm registry` commands should work
 const FeatureGateOCI = gates.Gate("HELM_EXPERIMENTAL_OCI")
 
-var (
-	settings = cli.New()
-)
+var settings = cli.New()
 
 func init() {
 	log.SetFlags(log.Lshortfile)
@@ -72,6 +70,8 @@ func main() {
 	actionConfig := new(action.Configuration)
 	cmd := newRootCmd(actionConfig, os.Stdout, os.Args[1:])
 
+	// run when each command's execute method is called
+	cobra.OnInitialize(func() {
 		helmDriver := os.Getenv("HELM_DRIVER")
 		if err := actionConfig.Init(settings.RESTClientGetter(), settings.Namespace(), helmDriver, debug); err != nil {
 			log.Fatal(err)
@@ -79,6 +79,7 @@ func main() {
 		if helmDriver == "memory" {
 			loadReleasesInMemory(actionConfig)
 		}
+	})
 
 	if err := cmd.Execute(); err != nil {
 		debug("%+v", err)

pkg/cli/environment.go

@@ -26,21 +26,17 @@ import (
 	"fmt"
 	"os"
 	"strconv"
-	"sync"
 
 	"github.com/spf13/pflag"
-
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 
 	"helm.sh/helm/v3/pkg/helmpath"
-	"helm.sh/helm/v3/pkg/kube"
 )
 
 // EnvSettings describes all of the environment settings.
 type EnvSettings struct {
 	namespace string
-	config     genericclioptions.RESTClientGetter
-	configOnce sync.Once
+	config    *genericclioptions.ConfigFlags
 
 	// KubeConfig is the path to the kubeconfig file
 	KubeConfig string
@@ -63,8 +59,7 @@ type EnvSettings struct {
 }
 
 func New() *EnvSettings {
-
-	env := EnvSettings{
+	env := &EnvSettings{
 		namespace:        os.Getenv("HELM_NAMESPACE"),
 		KubeContext:      os.Getenv("HELM_KUBECONTEXT"),
 		KubeToken:        os.Getenv("HELM_KUBETOKEN"),
@@ -75,7 +70,16 @@ func New() *EnvSettings {
 		RepositoryCache:  envOr("HELM_REPOSITORY_CACHE", helmpath.CachePath("repository")),
 	}
 	env.Debug, _ = strconv.ParseBool(os.Getenv("HELM_DEBUG"))
-	return &env
+
+	// bind to kubernetes config flags
+	env.config = &genericclioptions.ConfigFlags{
+		Namespace:   &env.namespace,
+		Context:     &env.KubeContext,
+		BearerToken: &env.KubeToken,
+		APIServer:   &env.KubeAPIServer,
+		KubeConfig:  &env.KubeConfig,
+	}
+	return env
 }
 
 // AddFlags binds flags to the given flagset.
@@ -107,25 +111,21 @@ func (s *EnvSettings) EnvVars() map[string]string {
 		"HELM_REPOSITORY_CACHE":  s.RepositoryCache,
 		"HELM_REPOSITORY_CONFIG": s.RepositoryConfig,
 		"HELM_NAMESPACE":         s.Namespace(),
+
+		// broken, these are populated from helm flags and not kubeconfig.
 		"HELM_KUBECONTEXT":   s.KubeContext,
 		"HELM_KUBETOKEN":     s.KubeToken,
 		"HELM_KUBEAPISERVER": s.KubeAPIServer,
 	}
-
 	if s.KubeConfig != "" {
 		envvars["KUBECONFIG"] = s.KubeConfig
 	}
-
 	return envvars
 }
 
 // Namespace gets the namespace from the configuration
 func (s *EnvSettings) Namespace() string {
-	if s.namespace != "" {
-		return s.namespace
-	}
-
-	if ns, _, err := s.RESTClientGetter().ToRawKubeConfigLoader().Namespace(); err == nil {
+	if ns, _, err := s.config.ToRawKubeConfigLoader().Namespace(); err == nil {
 		return ns
 	}
 	return "default"
@@ -133,16 +133,5 @@ func (s *EnvSettings) Namespace() string {
 
 // RESTClientGetter gets the kubeconfig from EnvSettings
 func (s *EnvSettings) RESTClientGetter() genericclioptions.RESTClientGetter {
-	s.configOnce.Do(func() {
-		clientConfig := kube.GetConfig(s.KubeConfig, s.KubeContext, s.namespace)
-		if s.KubeToken != "" {
-			clientConfig.BearerToken = &s.KubeToken
-		}
-		if s.KubeAPIServer != "" {
-			clientConfig.APIServer = &s.KubeAPIServer
-		}
-
-		s.config = clientConfig
-	})
 	return s.config
 }

pkg/getter/getter_test.go

@@ -53,9 +53,10 @@ func TestProviders(t *testing.T) {
 }
 
 func TestAll(t *testing.T) {
-	all := All(&cli.EnvSettings{
-		PluginsDirectory: pluginDir,
-	})
+	env := cli.New()
+	env.PluginsDirectory = pluginDir
+
+	all := All(env)
 	if len(all) != 3 {
 		t.Errorf("expected 3 providers (default plus two plugins), got %d", len(all))
 	}
@@ -66,9 +67,10 @@ func TestAll(t *testing.T) {
 }
 
 func TestByScheme(t *testing.T) {
-	g := All(&cli.EnvSettings{
-		PluginsDirectory: pluginDir,
-	})
+	env := cli.New()
+	env.PluginsDirectory = pluginDir
+
+	g := All(env)
 	if _, err := g.ByScheme("test"); err != nil {
 		t.Error(err)
 	}

pkg/getter/httpgetter_test.go

@@ -122,7 +122,7 @@ func TestDownload(t *testing.T) {
 	}))
 	defer srv.Close()
 
-	g, err := All(new(cli.EnvSettings)).ByScheme("http")
+	g, err := All(cli.New()).ByScheme("http")
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/getter/plugingetter_test.go

@@ -24,9 +24,9 @@ import (
 )
 
 func TestCollectPlugins(t *testing.T) {
-	env := &cli.EnvSettings{
-		PluginsDirectory: pluginDir,
-	}
+	env := cli.New()
+	env.PluginsDirectory = pluginDir
+
 	p, err := collectPlugins(env)
 	if err != nil {
 		t.Fatal(err)
@@ -54,9 +54,8 @@ func TestPluginGetter(t *testing.T) {
 		t.Skip("TODO: refactor this test to work on windows")
 	}
 
-	env := &cli.EnvSettings{
-		PluginsDirectory: pluginDir,
-	}
+	env := cli.New()
+	env.PluginsDirectory = pluginDir
 	pg := NewPluginGetter("echo", env, "test", ".")
 	g, err := pg()
 	if err != nil {
@@ -80,9 +79,9 @@ func TestPluginSubCommands(t *testing.T) {
 		t.Skip("TODO: refactor this test to work on windows")
 	}
 
-	env := &cli.EnvSettings{
-		PluginsDirectory: pluginDir,
-	}
+	env := cli.New()
+	env.PluginsDirectory = pluginDir
+
 	pg := NewPluginGetter("echo -n", env, "test", ".")
 	g, err := pg()
 	if err != nil {

pkg/kube/config.go

@@ -19,6 +19,8 @@ package kube // import "helm.sh/helm/v3/pkg/kube"
 import "k8s.io/cli-runtime/pkg/genericclioptions"
 
 // GetConfig returns a Kubernetes client config.
+//
+// Deprecated
 func GetConfig(kubeconfig, context, namespace string) *genericclioptions.ConfigFlags {
 	cf := genericclioptions.NewConfigFlags(true)
 	cf.Namespace = &namespace

pkg/plugin/plugin_test.go

@@ -305,9 +305,8 @@ func TestSetupEnv(t *testing.T) {
 	name := "pequod"
 	base := filepath.Join("testdata/helmhome/helm/plugins", name)
 
-	s := &cli.EnvSettings{
-		PluginsDirectory: "testdata/helmhome/helm/plugins",
-	}
+	s := cli.New()
+	s.PluginsDirectory = "testdata/helmhome/helm/plugins"
 
 	SetupPluginEnv(s, name, base)
 	for _, tt := range []struct {