refactor: dedupe daemon exec wrappers

src/daemon/systemd.ts

@@ -1,13 +1,12 @@
-import { execFile } from "node:child_process";
 import fs from "node:fs/promises";
 import path from "node:path";
-import { promisify } from "node:util";
 import type { GatewayServiceRuntime } from "./service-runtime.js";
 import {
   formatGatewayServiceDescription,
   LEGACY_GATEWAY_SYSTEMD_SERVICE_NAMES,
   resolveGatewaySystemdServiceName,
 } from "./constants.js";
+import { execFileUtf8 } from "./exec-file.js";
 import { formatLine, toPosixPath } from "./output.js";
 import { resolveHomeDir } from "./paths.js";
 import { parseKeyValueOutput } from "./runtime-parse.js";
@@ -22,8 +21,6 @@ import {
   parseSystemdExecStart,
 } from "./systemd-unit.js";
 
-const execFileAsync = promisify(execFile);
-
 function resolveSystemdUnitPathForName(
   env: Record<string, string | undefined>,
   name: string,
@@ -142,29 +139,7 @@ export function parseSystemdShow(output: string): SystemdServiceInfo {
 async function execSystemctl(
   args: string[],
 ): Promise<{ stdout: string; stderr: string; code: number }> {
-  try {
-    const { stdout, stderr } = await execFileAsync("systemctl", args, {
-      encoding: "utf8",
-    });
-    return {
-      stdout: String(stdout ?? ""),
-      stderr: String(stderr ?? ""),
-      code: 0,
-    };
-  } catch (error) {
-    const e = error as {
-      stdout?: unknown;
-      stderr?: unknown;
-      code?: unknown;
-      message?: unknown;
-    };
-    return {
-      stdout: typeof e.stdout === "string" ? e.stdout : "",
-      stderr:
-        typeof e.stderr === "string" ? e.stderr : typeof e.message === "string" ? e.message : "",
-      code: typeof e.code === "number" ? e.code : 1,
-    };
-  }
+  return await execFileUtf8("systemctl", args);
 }
 
 export async function isSystemdUserServiceAvailable(): Promise<boolean> {