index.js

#!/usr/bin/env node
const chalk = require('chalk');
const fs = require('fs');
const path = require('path');

const msgPath = path.resolve('.git/COMMIT_EDITMSG');
const msg = fs.readFileSync(msgPath, 'utf-8').trim();

const commitRE =
  /^(revert: )?(feat|fix|docs|dx|style|refactor|perf|test|workflow|build|ci|chore|types|wip)(\(.+\))?(\:|\!\:) .{1,50}/;

if (!commitRE.test(msg)) {
  console.log();
  console.error(
    `  ${chalk.bgRed.white(' ERROR ')} ${chalk.red(`invalid commit message format.`)}\n\n` +
      chalk.yellow(
        `  Proper commit message format is required for automated changelog generation. Examples:\n\n`,
      ) +
      `    ${chalk.green(`feat(compiler): add 'comments' option`)}\n` +
      `    ${chalk.green(`fix(modal): handle events on blur (close #28)`)}\n\n` +
      chalk.yellow(`  See .github/commit-convention.md for more details.\n`),
  );
  process.exit(1);
}