Use lerna to backfill GitHub release notes from a change log.

backfill-releases.js

/* eslint-disable no-console */
const createRelease = require('@lerna/version/lib/create-release.js'); // eslint-disable-line import/no-extraneous-dependencies
const fs = require('fs');

function parseEntry(entry) {
  const lines = entry.split('\n');
  const header = lines.shift();
  const [version] = header.split(']');
  const tag = `v${version}`;
  const title = `# [${header}`;
  lines.unshift(title);
  const body = lines.join('\n').trim();
  return { tag, body };
}

function getReleases() {
  const log = fs.readFileSync('./CHANGELOG.md').toString();
  const entries = log.split(/#+ \[/);
  entries.shift(); // dump header
  entries.shift(); // dump already released version
  const releases = entries.map((e) => parseEntry(e));
  return releases;
}

async function push(release) {
  const { tag, body } = release;
  const type = 'github';
  const git = {
    gitRemote: 'origin',
    // execOpts: ?,
  };
  const details = {
    tags: [tag],
    releaseNotes: [{ name: 'fixed', notes: body }],
  };
  try {
    // console.log(body);
    await createRelease(type, details, git);
  } catch (e) {
    console.error(e);
  }
}

async function pushAll(releases, offset = 0) {
  const release = releases[offset];
  if (!release) {
    console.log('complete');
    return releases.length;
  }
  console.log(`[${offset + 1}/${releases.length}] releasing ${release.tag}...`);
  await push(release);
  return pushAll(releases, offset + 1);
}

console.log('backfilling release notes');
const releases = getReleases();
pushAll(releases, 2);