Setup to generate git tag and GitHub release with changelog based on commit messages

changelog.js

#!/bin/env node

// @ts-check
import fs from 'fs';
import { exec as execCb } from 'child_process';

import util from 'util';

import moment from 'moment';
import git from 'simple-git/promise';
import changelog from 'generate-changelog';
import idx from 'idx';

const argv = require('minimist')(process.argv.slice(1));
const { Octokit } = require('@octokit/rest');

const exec = util.promisify(execCb);

const owner = 'foo';
const repo = 'bar';

const createPullRequest = async (branchName, tag) => {
  if (!process.env.GITHUB_TOKEN) {
    return;
  }

  const octokit = new Octokit({
    auth: process.env.GITHUB_TOKEN,
  });

  const now = moment().format('YYYY-MM-DD');

  // https://octokit.github.io/rest.js/#api-Repos-getReleases
  // https://developer.github.com/v3/repos/releases/#list-releases-for-a-repository
  const latestReleases = await octokit.repos.listReleases({ owner, repo, per_page: 1 });
  const latestReleaseTag =
    latestReleases && latestReleases.data && latestReleases.data.length ? latestReleases.data[0].tag_name : 'master';

  await octokit.pulls.create({
    owner,
    repo,
    title: `Deploy Production - ${tag} - ${now}`,
    head: branchName,
    base: 'master',
    body: `https://github.com/${owner}/${repo}/compare/${latestReleaseTag}...master`,
  });
};

(async () => {
  try {
    await git().tags();

    const currentChangelog = fs.readFileSync('./CHANGELOG.md');

    const changelogContent = await changelog.generate({
      major: argv.major,
      minor: argv.minor,
      patch: argv.patch,
    });

    const rxVersion = /\d+\.\d+\.\d+/;
    const newVersion = argv.version || `${idx(changelogContent.match(rxVersion), _ => _[0])}`;

    const newChangelogContent = changelogContent.replace(rxVersion, newVersion) + currentChangelog;
    fs.writeFileSync('./CHANGELOG.md', newChangelogContent);

    await exec(`npm version --no-git-tag-version ${newVersion}`);
    await exec(`lerna version --no-git-tag-version --yes ${newVersion}`);

    const tag = `v${newVersion}`;

    const today = new Date();

    const branchName = `feature-production/${today.getFullYear()}${today.getMonth() + 1}${today.getDate()}`;

    await git().checkout(['-B', branchName]);
    await git().add(['package.json', 'lerna.json', 'CHANGELOG.md', 'packages/*/package.json']);
    await git().commit(`build(change-log): ${tag}`, [], '-n');
    await git().addAnnotatedTag(`${tag}`, `build(tag): ${tag}`);
    await git().push(['--follow-tags', '-u', 'origin', branchName]);

    await createPullRequest(branchName, tag);
  } catch (err) {
    // eslint-disable-next-line
    console.log('err:', err);
  }
})();

commitlint.config.js

module.exports = {
  rules: {
    'body-leading-blank': [1, 'always'],
    'footer-leading-blank': [1, 'always'],
    'header-max-length': [2, 'always', 100],
    'scope-case': [2, 'always', 'lower-case'],
    'subject-case': [2, 'never', ['sentence-case', 'start-case', 'pascal-case', 'upper-case']],
    'subject-empty': [2, 'never'],
    'subject-full-stop': [2, 'never', '.'],
    'type-case': [2, 'always', 'lower-case'],
    'type-empty': [2, 'never'],
    'type-enum': [
      2,
      'always',
      [
        'build',
        'chore',
        'ci',
        'docs',
        'feat',
        'fix',
        'perf',
        'refactor',
        'revert',
        'style',
        'test',
        'migration',
        'type',
        'lint',
      ],
    ],
  },
};

husky.config.js

module.exports = {
  hooks: {
    'pre-commit': 'lint-staged',
    'commit-msg': 'commitlint -E HUSKY_GIT_PARAMS',
  },
};

GitHub Release

git diff available on "4 commits" link