feat(create): load examples manifest from dist/examples.json

Made-with: Cursor

packages/create/src/examples.ts

@@ -0,0 +1,35 @@
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { CliError } from "./errors.js";
+
+export type ExamplesManifest = { examples: string[] };
+
+export function loadExamplesManifest(): string[] {
+  const manifestPath = path.join(
+    path.dirname(fileURLToPath(import.meta.url)),
+    "examples.json"
+  );
+  if (!fs.existsSync(manifestPath)) {
+    throw new CliError(
+      `Missing ${manifestPath}. Run pnpm run build in packages/create.`,
+      "INVALID_INPUT"
+    );
+  }
+  const data = JSON.parse(
+    fs.readFileSync(manifestPath, "utf8")
+  ) as ExamplesManifest;
+  if (!Array.isArray(data.examples) || data.examples.length === 0) {
+    throw new CliError("Invalid examples.json", "INVALID_INPUT");
+  }
+  return data.examples;
+}
+
+export function assertValidExample(name: string, list: string[]): void {
+  if (!list.includes(name)) {
+    throw new CliError(
+      `Unknown example "${name}". Valid: ${list.join(", ")}`,
+      "INVALID_INPUT"
+    );
+  }
+}