const { execSync } = require('child_process');
const fs = require('fs');
const path = require('path');

function sh(cmd) {
  try { return execSync(cmd, { encoding: 'utf8' }).trim(); } catch { return ''; }
}

const out = {
  full: sh('git rev-parse HEAD'),
  short: sh('git rev-parse --short HEAD'),
  date: sh('git log -1 --format=%cI')
};

fs.writeFileSync(
  path.join(__dirname, '..', 'public', 'version.json'),
  JSON.stringify(out, null, 2)
);