chore: check for kubeconfig file on startup before watcher events

Signed-off-by: Florent Benoit <fbenoit@redhat.com>

Author: benoitf

packages/main/src/plugin/kubernetes/kubernetes-client.spec.ts

@@ -61,6 +61,8 @@ import type { PodCreationSource, ScalableControllerType } from './kubernetes-cli
 import { KubernetesClient } from './kubernetes-client.js';
 import { ResizableTerminalWriter } from './kubernetes-exec-transmitter.js';
 
+vi.mock(import('node:fs'));
+
 const _onDidChangeConfiguration = new Emitter<IConfigurationChangeEvent>();
 const configurationRegistry: ConfigurationRegistry = {
   onDidChangeConfiguration: _onDidChangeConfiguration.event,
@@ -1122,6 +1124,7 @@ test('Expect applyResourcesFromYAML to correctly call applyResources after loadi
 });
 
 test('setupWatcher sends kubernetes-context-update when kubeconfig file changes', async () => {
+  vi.mocked(fs.existsSync).mockReturnValue(true);
   const client = createTestClient();
   const fileSystemMonitoringSpy = vi.spyOn(fileSystemMonitoring, 'createFileSystemWatcher');
   const onDidChangeMock = vi.fn();

packages/main/src/plugin/kubernetes/kubernetes-client.ts

@@ -261,8 +261,8 @@ export class KubernetesClient {
         if (!val?.trim()) {
           val = defaultKubeconfigPath;
         }
-        this.setupWatcher(val);
         await this.setKubeconfig(Uri.file(val));
+        this.setupWatcher(val);
       }
     });
   }
@@ -278,6 +278,17 @@ export class KubernetesClient {
     this.kubeConfigWatcher = this.fileSystemMonitoring.createFileSystemWatcher(kubeconfigFile);
 
     const location = Uri.file(kubeconfigFile);
+    const notifyKubeConfigExist = async (): Promise<void> => {
+      await this.refresh();
+      this._onDidUpdateKubeconfig.fire({ type: 'CREATE', location });
+      this.apiSender.send('kubernetes-context-update');
+    };
+
+    if (fs.existsSync(kubeconfigFile)) {
+      notifyKubeConfigExist().catch((error: unknown) => {
+        console.error('Error while checking kubeconfig', error);
+      });
+    }
 
     // needs to refresh
     this.kubeConfigWatcher.onDidChange(async () => {
@@ -287,9 +298,7 @@ export class KubernetesClient {
     });
 
     this.kubeConfigWatcher.onDidCreate(async () => {
-      await this.refresh();
-      this._onDidUpdateKubeconfig.fire({ type: 'CREATE', location });
-      this.apiSender.send('kubernetes-context-update');
+      await notifyKubeConfigExist();
     });
 
     this.kubeConfigWatcher.onDidDelete(() => {