fix: eslint errors

package.json

@@ -149,7 +149,7 @@
     "publish:ovsx": "yarn run env-cmd --expand-envs ovsx publish *.vsix --pat '$OVS_PAT'",
     "publish:vsce": "vsce publish",
     "publish": "yarn package && yarn publish:vsce && yarn publish:ovsx",
-    "lint": "ESLINT_USE_FLAT_CONFIG=false eslint --ext ts src"
+    "lint": "eslint src"
   },
   "dependencies": {
     "command-exists": "^1.2.9",

src/client.ts

@@ -12,21 +12,20 @@ import {
   ServerOptions,
 } from "vscode-languageclient/node";
 import { config, UriMessageItem } from "./configuration";
-
-import commandExists = require("command-exists");
+import { sync as commandExistsSync } from "command-exists";
 
 let client: LanguageClient;
 
 export async function activate(context: ExtensionContext): Promise<void> {
-  if (!commandExists.sync(config.serverPath)) {
+  if (!commandExistsSync(config.serverPath)) {
     const selection = await window.showErrorMessage<UriMessageItem>(
       `Command ${config.serverPath} not found in $PATH`,
       {
         title: "Install language server",
         uri: Uri.parse(
-          "https://github.com/nix-community/vscode-nix-ide?tab=readme-ov-file#language-servers"
+          "https://github.com/nix-community/vscode-nix-ide?tab=readme-ov-file#language-servers",
         ),
-      }
+      },
     );
     if (selection?.uri !== undefined) {
       await env.openExternal(selection?.uri);
@@ -85,7 +84,11 @@ export async function restart(context: ExtensionContext): Promise<void> {
     "$(loading~spin) Restarting Nix language server",
   );
   try {
-    client ? await client.restart() : await activate(context);
+    if (client) {
+      await client.restart();
+    } else {
+      await activate(context);
+    }
   } catch (error) {
     client?.error("Failed to restart Nix language server", error, "force");
   } finally {

src/process-runner.ts

@@ -69,7 +69,7 @@ export interface IProcessResult {
 export const runInWorkspace = (
   folder: WorkspaceFolder | undefined,
   command: ReadonlyArray<string>,
-  stdin?: string
+  stdin?: string,
 ): Promise<IProcessResult> =>
   new Promise((resolve, reject) => {
     const cwd = folder ? folder.uri.fsPath : process.cwd();
@@ -82,12 +82,12 @@ export const runInWorkspace = (
           // Throw system errors, but do not fail if the command
           // fails with a non-zero exit code.
           console.error("Command error", command, error);
-          reject(error);
+          reject(error); // eslint-disable-line @typescript-eslint/prefer-promise-reject-errors
         } else {
           const exitCode = error ? error.code : 0;
           resolve({ stdout, stderr, exitCode });
         }
-      }
+      },
     );
     if (stdin && child.stdin) {
       child.stdin.end(stdin);