text: #!/usr/bin/env node
  
  const fs = require('fs');
  const glob = require('glob');
  const proc = require('child_process');
  
  const gitStatus = proc.execFileSync('git', ['status', '--porcelain', '-uno', 'contracts/**/*.sol']);
  
  if (gitStatus.length > 0) {
    console.error('Contracts directory is not clean');
    process.exit(1);
  }
  
  const { version } = require('../../package.json');
  
  const files = glob.sync('contracts/!(mocks)/**/*.sol');
  
  for (const file of files) {
    const current = fs.readFileSync(file, 'utf8');
    const updated = current.replace(
      /(\/\/ SPDX-License-Identifier:.*)$(\n\/\/ OpenZeppelin Contracts v.*$)?/m,
      `$1\n// OpenZeppelin Contracts v${version} (${file.replace('contracts/', '')})`,
    );
    fs.writeFileSync(file, updated);
  }
  
  proc.execFileSync('git', ['add', '--update', 'contracts']);
  