cli: add local-server to expf

Author: RafaelGSS

package.json

@@ -4,6 +4,7 @@
   "description": "ExpressJS Performance Working Group",
   "scripts": {
     "setup": "npm i",
+    "local-server": "expf local-server",
     "test": "echo \"Error: no test specified\" && exit 1",
     "load": "expf load",
     "test:load": "expf load --test=@expressjs/perf-load-example",

packages/cli/bin/expf.mjs

@@ -78,6 +78,13 @@ switch (positionals[2]) {
       console.error(e);
     }
     break;
+  case 'local-server':
+    try {
+      await (await import('../local-server.mjs')).default(values);
+    } catch (e) {
+      console.error(e);
+    }
+    break;
   default:
     console.log(`
 Express Performance Testing CLI

packages/cli/load.mjs

@@ -2,6 +2,7 @@ import { normalize, join, dirname } from 'node:path';
 import { writeFile, mkdir } from 'node:fs/promises';
 import nv from '@pkgjs/nv';
 
+// TODO: Add description to each flag
 export function help (opts = {}) {
   return `$ expf load [flags]
 

packages/cli/local-server.mjs

@@ -0,0 +1,39 @@
+import { join } from 'node:path';
+import { spawn } from 'node:child_process';
+
+// TODO: add options to load different servers
+export function help () {
+  return `$ expf local-server
+
+  Start Express local HTTP server
+`
+}
+
+export function startServer () {
+  const server = spawn(
+    process.execPath,
+    [
+      join(import.meta.dirname, '../../servers/node-http/index.mjs'),
+    ],
+    {
+      env: {
+        ...process.env,
+        PORT: 3000
+      },
+      stdio: ['inherit', 'inherit', 'inherit']
+    }
+  );
+
+  return new Promise((resolve, reject) => {
+    server.on('error', reject);
+    server.on('close', resolve);
+
+    process.on('beforeExit', () => {
+      server.close();
+    });
+  })
+}
+
+export default async function main (_opts = {}) {
+  await startServer();
+}