fix: use first part when KUBECONFIG has multiple paths

internal/utils/kubernetes.go

@@ -18,9 +18,11 @@ package utils
 
 import (
 	"fmt"
-	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
 	"os"
 	"path/filepath"
+	"strings"
+
+	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
 
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/client-go/util/homedir"
@@ -47,16 +49,25 @@ func NewNamespacedContext(namespace, context string) *NamespacedContext {
 	}
 }
 
-func loadKubeconfig() (*clientcmdapi.Config, error) {
+func getKubeconfigPath() (string, error) {
 	kubeconfigPath := os.Getenv("KUBECONFIG")
 	if kubeconfigPath == "" {
 		home := homedir.HomeDir()
 		if home == "" {
-			return nil, fmt.Errorf("could not find home directory")
+			return "", fmt.Errorf("could not find home directory")
 		}
 		kubeconfigPath = filepath.Join(home, ".kube", "config")
 	}
+	// If KUBECONFIG contains multiple paths, use the first one.
+	parts := strings.Split(kubeconfigPath, ":")
+	return parts[0], nil
+}
 
+func loadKubeconfig() (*clientcmdapi.Config, error) {
+	kubeconfigPath, err := getKubeconfigPath()
+	if err != nil {
+		return nil, err
+	}
 	return clientcmd.LoadFromFile(kubeconfigPath)
 }
 

internal/utils/kubernetes_test.go

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2025 Michele Zanotti <m.zanotti019@gmail.com>
+ *
+ * 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 utils
+
+import (
+	"testing"
+)
+
+func TestGetKubeconfigPath(t *testing.T) {
+
+	t.Run("Test with KUBECONFIG set", func(t *testing.T) {
+		t.Setenv("KUBECONFIG", "/tmp/kubeconfig")
+		kubeconfigPath, err := getKubeconfigPath()
+		if err != nil {
+			t.Fatalf("Failed to get kubeconfig path: %v", err)
+		}
+		if kubeconfigPath != "/tmp/kubeconfig" {
+			t.Fatalf("Expected /tmp/kubeconfig, got %s", kubeconfigPath)
+		}
+	})
+
+	t.Run("Test with KUBECONFIG with multiple parts", func(t *testing.T) {
+		t.Setenv("KUBECONFIG", "/tmp/kubeconfig:/tmp/kubeconfig2")
+		kubeconfigPath, err := getKubeconfigPath()
+		if err != nil {
+			t.Fatalf("Failed to get kubeconfig path: %v", err)
+		}
+		if kubeconfigPath != "/tmp/kubeconfig" {
+			t.Fatalf("Expected /tmp/kubeconfig, got %s", kubeconfigPath)
+		}
+	})
+
+	t.Run("Test with KUBECONFIG not set", func(t *testing.T) {
+		t.Setenv("HOME", "/tmp")
+		t.Setenv("KUBECONFIG", "")
+		kubeconfigPath, err := getKubeconfigPath()
+		if err != nil {
+			t.Fatalf("Failed to get kubeconfig path: %v", err)
+		}
+		expectedPath := "/tmp/.kube/config"
+		if kubeconfigPath != expectedPath {
+			t.Fatalf("Expected %s, got %s", expectedPath, kubeconfigPath)
+		}
+	})
+}