Do not use exec to get the kubeconfig file

package.json

@@ -1,7 +1,7 @@
 {
     "name": "microk8s-vscode",
-    "displayName": "Microk8s",
-    "description": "Work with the Microk8s local Kubernetes provider in Visual Studio Code",
+    "displayName": "MicroK8s",
+    "description": "Work with the MicroK8s local Kubernetes provider in Visual Studio Code",
     "publisher": "ms-kubernetes-tools",
     "version": "0.0.1",
     "engines": {

src/microk8s-cloud-provider.ts

@@ -2,16 +2,14 @@ import * as vscode from 'vscode';
 import * as k8s from 'vscode-kubernetes-tools-api';
 
 import * as microk8s from './microk8s/microk8s';
-import { failed } from './utils/errorable';
-import { shell } from './utils/shell';
 
 class Microk8sCloudProvider implements k8s.CloudExplorerV1.CloudProvider {
-    readonly cloudName = "Microk8s";
+    readonly cloudName = "MicroK8s";
     readonly treeDataProvider = new Microk8sTreeDataProvider();
     async getKubeconfigYaml(cluster: any): Promise<string | undefined> {
         const treeNode = cluster as Microk8sCloudProviderTreeNode;
         if (treeNode.nodeType === 'cluster') {
-            return await getMicrok8sKubeconfigYaml();
+            return getMicroK8sKubeconfigYaml();
         }
         return undefined;
     }
@@ -39,7 +37,7 @@ class Microk8sTreeDataProvider implements vscode.TreeDataProvider<Microk8sCloudP
             treeItem.tooltip = element.diagnostic;
             return treeItem;
         } else {
-            const treeItem = new vscode.TreeItem("Microk8s Instance", vscode.TreeItemCollapsibleState.None);
+            const treeItem = new vscode.TreeItem("Kubeconfig", vscode.TreeItemCollapsibleState.None);
             treeItem.contextValue = `microk8s.cluster ${k8s.CloudExplorerV1.SHOW_KUBECONFIG_COMMANDS_CONTEXT}`;
             return treeItem;
         }
@@ -53,20 +51,15 @@ class Microk8sTreeDataProvider implements vscode.TreeDataProvider<Microk8sCloudP
     }
 }
 
-async function getMicrok8sKubeconfigYaml(): Promise<string | undefined> {
-    const yaml = await microk8s.getKubeconfig(shell);
-    if (failed(yaml)) {
-        if (yaml.error[0].includes('Insufficient permissions')) {
-            vscode.window.showErrorMessage("Can't get kubeconfig for Microk8s. You need to add yourself to the 'microk8s' group using the command 'sudo usermod -a -G microk8s <your-name>' then log out and log in again.");
-        } else {
-            vscode.window.showErrorMessage(`Can't get kubeconfig for Microk8s: ${yaml.error[0]}`);
-        }
+function getMicroK8sKubeconfigYaml(): string | undefined {
+    try {
+        const originalKubeconfig = microk8s.getKubeconfigYaml();
+        const distinctKubeconfig = renameDistinctUser(originalKubeconfig);
+        return distinctKubeconfig;
+    }  catch (ex) {
+        vscode.window.showErrorMessage("Can't get kubeconfig for Microk8s. "+ ex.message);
         return undefined;
     }
-
-    const originalKubeconfig = yaml.result;
-    const distinctKubeconfig = renameDistinctUser(originalKubeconfig);
-    return distinctKubeconfig;
 }
 
 function renameDistinctUser(kubeconfig: string): string {

src/microk8s/microk8s.ts

@@ -1,37 +1,12 @@
 import * as vscode from 'vscode';
+import * as fs from 'fs';
 
 // import * as config from '../config/config';
-import { Errorable } from '../utils/errorable';
-import * as shell from '../utils/shell';
 
-const logChannel = vscode.window.createOutputChannel("Microk8s");
+const logChannel = vscode.window.createOutputChannel("MicroK8s");
 
-async function invokeObj<T>(sh: shell.Shell, command: string, args: string, opts: shell.ExecOpts, fn: (stdout: string) => T, errfn?: (sr: shell.ShellResult) => Errorable<T>): Promise<Errorable<T>> {
-    const bin = /* config.microk8sPath() || */ 'microk8s';
-    const cmd = `${bin}.${command} ${args}`;
-    logChannel.appendLine(`$ ${cmd}`);
-    return await sh.execObj<T>(
-        cmd,
-        `microk8s.${command}`,
-        opts,
-        andLog(fn),
-        errfn
-    );
-}
-
-function andLog<T>(fn: (s: string) => T): (s: string) => T {
-    return (s: string) => {
-        logChannel.appendLine(s);
-        return fn(s);
-    };
-}
-
-export async function getKubeconfig(sh: shell.Shell): Promise<Errorable<string>> {
-    const onError = (sr: shell.ShellResult): Errorable<string> => {
-        if (sr.stderr && sr.stderr.trim().length > 0) {
-            return { succeeded: false, error: [sr.stderr] };
-        }
-        return { succeeded: false, error: [sr.stdout] };  // Because Microk8s prints permissions errors to stdout
-    };
-    return invokeObj(sh, `kubectl config view`, ` --raw`, {}, (s) => s, onError);
+export function getKubeconfigYaml(): string {
+    const kubeconfigfile = '/var/snap/microk8s/current/credentials/client.config';
+    logChannel.appendLine(`Reading kubeconfig file at ${kubeconfigfile}`);
+    return fs.readFileSync(kubeconfigfile, 'utf8');
 }