deploy-checks

#!/usr/bin/env node
console.log('Checking deploy prerequisites...')
console.log('')

const { execSync } = require('child_process')
const version = require('./package.json')
  .version.toString()
  .replace(/[^a-zA-Z0-9.-]/g, '')
const { readFileSync } = require('fs')

process.chdir(__dirname)

function run(cmd) {
  return execSync(cmd)
    .toString()
    .trim()
}

// Check for uncommitted changes

const uncommittedChanges = run('git status --porcelain')
if (uncommittedChanges.length > 0) {
  console.error('ERROR: Project has uncommitted changes.')
  process.exit(1)
}

// Check remote history

const remoteChanges = run("git rev-list --count --left-only '@{u}...HEAD'")
if (remoteChanges !== '0') {
  console.error('ERROR: Remote has unmerged changes.')
  process.exit(1)
}

// Check changelog

const readmeContents = readFileSync('CHANGELOG.md', 'utf8')
const changelogPattern = new RegExp(
  `^## \\[${version.replace(/\./g, '\\.')}\\] - `,
  'm'
)
if (!changelogPattern.test(readmeContents)) {
  console.error(`ERROR: No changelog entry was created for version ${version}.`)
  process.exit(1)
}

// Check for version bump

const changedFiles = run('git diff-tree --no-commit-id --name-only -r HEAD')

let versionBump = false
if (/^package\.json$/m.test(changedFiles)) {
  const latestPackageJsonChanges = run('git diff HEAD^ HEAD package.json')

  if (
    /^-\s*"version": "[0-9a-zA-Z.-]+",?$/m.test(latestPackageJsonChanges) &&
    /^\+\s*"version": "[0-9a-zA-Z.-]+",?$/m.test(latestPackageJsonChanges)
  ) {
    versionBump = true
  }
}

if (!versionBump) {
  console.error('ERROR: Latest commit does not contain a version bump.')
  process.exit(1)
}

// Check for tag

const hasTag = run('git tag -l ' + version)
if (hasTag.length === 0) {
  console.error(`ERROR: git tag with current version ${version} is not set.`)
  process.exit(1)
}

console.log('All good, continue to deploy.')