create-solana-program/template/base/scripts/program/format.mjs

#!/usr/bin/env zx
import 'zx/globals';
import { workingDirectory, getProgramFolders } from '../utils.mjs';

// Format the programs.
for (const folder of getProgramFolders()) {
  cd(`${path.join(workingDirectory, folder)}`);
  await $`cargo fmt ${process.argv.slice(3)}`;
}