content: add approved public portfolio projection

scripts/materialize-empty-asset-set.mjs

@@ -0,0 +1,33 @@
+import { lstat, mkdir, readFile, readdir } from 'node:fs/promises';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const repositoryRoot = resolve(dirname(fileURLToPath(import.meta.url)), '..');
+const manifestPath = resolve(repositoryRoot, 'content/public/asset-manifest.json');
+const preparedAssetsPath = resolve(repositoryRoot, 'inputs/prepared-assets');
+
+const readEmptyManifest = async () => {
+  const manifest = JSON.parse(await readFile(manifestPath, 'utf8'));
+  if (Object.keys(manifest).length !== 1 || !Array.isArray(manifest.assets) || manifest.assets.length !== 0) {
+    throw new Error('Phase 1 asset manifest must contain exactly zero assets.');
+  }
+};
+
+const ensureEmptyPreparedAssetDirectory = async () => {
+  try {
+    const stats = await lstat(preparedAssetsPath);
+    if (stats.isSymbolicLink() || !stats.isDirectory()) {
+      throw new Error('Prepared asset path must be a non-symlink directory.');
+    }
+  } catch (error) {
+    if ((error).code !== 'ENOENT') throw error;
+    await mkdir(preparedAssetsPath, { recursive: true });
+  }
+
+  if ((await readdir(preparedAssetsPath)).length !== 0) {
+    throw new Error('Prepared asset directory must be empty during Phase 1.');
+  }
+};
+
+await readEmptyManifest();
+await ensureEmptyPreparedAssetDirectory();