Add Swoole alternative backend

alt/swoole/manifest-smoke.mjs

@@ -0,0 +1,24 @@
+import assert from 'node:assert/strict';
+import { spawnSync } from 'node:child_process';
+import { createAssetManifest } from '../../server/asset-manifest.js';
+
+const scenarios = [
+  ['default', true, true],
+  ['hashing-off', false, true],
+  ['asset-sync-off', true, false],
+];
+for (const [name, hashing, assetSync] of scenarios) {
+  const php = spawnSync('php', ['-r', `require "alt/swoole/asset-manifest.php"; $m=new AssetManifest("frontend", ${hashing ? 'true' : 'false'}, ${assetSync ? 'true' : 'false'}); echo json_encode(["manifest"=>$m->manifest,"index"=>$m->index,"sw"=>$m->serviceWorker]);`], { encoding: 'utf8' });
+  assert.equal(php.status, 0, php.stderr);
+  const result = JSON.parse(php.stdout);
+  const bun = createAssetManifest('./frontend', { hashing, assetSync });
+  assert.equal(result.manifest.buildTag, bun.manifest.buildTag, `${name}: build tags match`);
+  assert.deepEqual(result.manifest.files, bun.manifest.files, `${name}: manifest file entries match`);
+  assert.deepEqual(result.manifest.groups, bun.manifest.groups, `${name}: asset groups match`);
+  assert.equal(result.index, bun.index, `${name}: stamped index bytes match`);
+  assert.equal(result.sw, bun.sw, `${name}: injected service worker bytes match`);
+  assert.equal(result.manifest.files['/admin.html'], undefined, `${name}: admin is not in the runtime manifest`);
+  assert.ok(result.index.includes(`<meta name="ytp-build" content="${result.manifest.buildTag}"`));
+  assert.match(result.sw, new RegExp(result.manifest.buildTag));
+  console.log(`manifest smoke passed (${name}): build=${result.manifest.buildTag}, files=${Object.keys(result.manifest.files).length}`);
+}