incVersion.js

const path = require('path')
const semver = require('semver')
const fs = require('fs')
const prettier = require('prettier')

function main() {
  let manifest = path.resolve('./public/manifest.json')
  let manifestData = require(manifest)

  let prevVersion = manifestData.version
  let latestVersion = semver.parse(prevVersion).inc('patch')

  process.stderr.write(
    `INFO: Bumping version from ${prevVersion} to ${latestVersion.version}\n`,
  )

  manifestData.version = latestVersion.version

  return fs.writeFileSync(
    manifest,
    prettier.format(JSON.stringify(manifestData), { parser: 'json-stringify' }),
  )
}

main()