first commit

internal/node-utils/src/prettier.ts

@@ -0,0 +1,21 @@
+import fs from 'node:fs/promises';
+
+import { format, getFileInfo, resolveConfig } from 'prettier';
+
+async function prettierFormat(filepath: string) {
+  const prettierOptions = await resolveConfig(filepath, {});
+
+  const fileInfo = await getFileInfo(filepath);
+
+  const input = await fs.readFile(filepath, 'utf8');
+  const output = await format(input, {
+    ...prettierOptions,
+    parser: fileInfo.inferredParser as any,
+  });
+  if (output !== input) {
+    await fs.writeFile(filepath, output, 'utf8');
+  }
+  return output;
+}
+
+export { prettierFormat };