init project

packages/api-docs-builder/utils/findIndexFile.ts

@@ -0,0 +1,23 @@
+import fs from 'fs';
+import path from 'path';
+
+const indexFileRegex = /^index.(js|ts)$/;
+
+/**
+ * Returns index.js/ts in any directory or null
+ * @param {string} directory
+ */
+export default function getIndexFile(directory: string) {
+  const items = fs.readdirSync(directory);
+
+  const indexFile = items.reduce((prev, curr) => {
+    if (!indexFileRegex.test(curr)) {
+      return prev;
+    }
+    return curr;
+  }, '');
+
+  return {
+    indexFilename: indexFile ? path.join(directory, indexFile) : null,
+  };
+}