redhot/lib/subcommand/release/changelogs.js

TypeScript Monorepo Management

const conventionalChangelog = require('conventional-changelog')
const addStream = require('add-stream')
const tempfile = require('tempfile')
const fs = require('fs')
const path = require('path')

const { isFile, exec } = require('../../util')

const startCommits = {}

function touchFile (path) {
  return exec(`touch ${path}`)
}

// Update the startCommit for each package, looking for release commits
// for each package.
exports.generateChangelogs = function (packages, rootDir, callback) {
  const config = {
    preset: 'angular',
    append: true,
    transform: function (commit, cb) {
      if (commit.type === 'release') {
        startCommits[commit.scope] = commit.hash
      }
      cb()
    }
  }

  conventionalChangelog(config, {}, { reverse: true })
    .on('end', () => runUpdateChangelogs(packages, rootDir, callback))
    .resume()
}

function runUpdateChangelogs (packages, rootDir, callback) {
  packages.forEach(function (packageName) {
    const filename = path.join(rootDir, packageName, '/CHANGELOG.md')

    if (!isFile(filename)) {
      touchFile(filename)
    }

    const changelogOpts = {
      preset: 'angular',
      releaseCount: 0,
      pkg: {
        path: path.join(rootDir, packageName, 'package.json')
      },
      transform: function (commit, cb) {
        if (commit.scope === packageName) {
          cb(null, commit)
        } else {
          cb()
        }
      }
    }

    const gitRawCommitsOpts = { from: startCommits[packageName] }

    const readStream = fs.createReadStream(filename)
    const tmp = tempfile()
    conventionalChangelog(changelogOpts, {}, gitRawCommitsOpts)
      .pipe(addStream(readStream))
      .pipe(fs.createWriteStream(tmp))
      .on('finish', function () {
        fs.createReadStream(tmp)
          .pipe(fs.createWriteStream(filename))
        console.log('Successfully updated changelog for ' + packageName + '!')
        callback && callback()
      })
  })
}