tiny-dream/scripts/config.js

A tiny Incremental DOM implementation for modern browsers.

const path = require('path')
const babel = require('rollup-plugin-babel')
const cjs = require('rollup-plugin-commonjs')
const replace = require('rollup-plugin-replace')
const node = require('rollup-plugin-node-resolve')
const version = process.env.VERSION || require('../package.json').version

const resolve = p => {
  const base = p.split('/')[0]
  return path.resolve(__dirname, '../', p)
}

const builds = {
  'tiny-dream-umd': {
    entry: resolve('src/tiny-dream.js'),
    dest: resolve('dist/tiny-dream.js'),
    format: 'umd',
    env: 'development'
  },
  'tiny-dream-umd-production': {
    entry: resolve('src/tiny-dream.js'),
    dest: resolve('dist/tiny-dream.min.js'),
    format: 'umd',
    env: 'production'
  },
  'tiny-dream-cjs': {
    entry: resolve('src/tiny-dream.js'),
    dest: resolve('dist/tiny-dream.common.js'),
    format: 'cjs',
    env: 'development'
  },
  'tiny-dream-cjs-production': {
    entry: resolve('src/tiny-dream.js'),
    dest: resolve('dist/tiny-dream.common.min.js'),
    format: 'cjs',
    env: 'production'
  }
}

const banner =
  '/*!\n' +
  ' * Tiny Dream v' + version + '\n' +
  ' * (c) 2018 Yoshihide Shiono\n' +
  ' * Released under the MIT License.\n' +
  ' */'

const onwarn = (warning) => {
  if (warning.code === 'THIS_IS_UNDEFINED' || warning.code === 'CIRCULAR_DEPENDENCY') {
    return
  }
  console.error(warning.message)
}

function genConfig (name) {
  const opts = builds[name]
  const config = {
    input: opts.entry,
    external: opts.external,
    onwarn: onwarn,
    plugins: [
      babel({
        exclude: 'node_modules/**',
        plugins: ['external-helpers']
      })
    ].concat(opts.plugins || []),
    output: {
      file: opts.dest,
      format: opts.format,
      banner: banner,
      name: opts.moduleName || 'TinyDream'
    }
  }

  if (opts.env) {
    config.plugins.push(replace({
      'process.env.NODE_ENV': JSON.stringify(opts.env)
    }))
  }

  Object.defineProperty(config, '_name', {
    enumerable: false,
    value: name
  })

  return config
}

if (process.env.TARGET) {
  module.exports = genConfig(process.env.TARGET)
} else {
  exports.getBuild = genConfig
  exports.getAllBuilds = () => Object.keys(builds).map(genConfig)
}