fliphub-monorepo/packages/fliphub/src/presets/PresetLibrary.js

the builder of builders

// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// preset Library & Target could be the same
//
// but we could do MULTI-LIBRARY...
// FOR MULTIPLE BUILDS OF THE SAME
// WITH DIFFERENT LIBRARIES
// TOP NOTCH <<<<<<<<<<<<<<<<<<<<<<

const is = require('izz')
const Joi = require('joi')
const log = require('fliplog')

module.exports = class PresetLibrary {
  init() {
    this.options = {
      library: 'cjs',
    }

    this.schema = Joi.object().keys({
      include: Joi.array(),
      exclude: Joi.array(),
      extensions: Joi.array(),
      ignoreGlobal: Joi.boolean(),
      namedExports: Joi.object(),
      ignore: Joi.array(),
    }).unknown(false)

    this.args = {
      include: 'node_modules/**',
    }
  }

  setArgs(arg) {
    if (!this.args) this.init()
    if (!is.real(arg)) return
    if (is.obj(arg)) {
      // if (arg.options) this.options = Object.assign(this.options, arg.options)
      const valid = {}
      // console.log(this.schema)
      // const valid = Joi.validate(arg, this.schema)
      if (!valid.error) this.args = Object.assign(this.args, arg)
      // else console.log(valid.error)
    }
    else if (is.str(arg)) {
      this.options.library = arg
    }
    else {
      throw new Error(`
        library preset must be a
        string | object with .library and .include`)
    }
  }

  toRollup() {
    const {library} = this.options
    // log.text('usecommonjs').data(this).verbose().exit()
    if (library === 'cjs') {
      const commonjs = require('rollup-plugin-commonjs')
      return {
        pluginIndex: 20,
        plugins: [
          commonjs(this.args),
        ],
      }
    }
    console.log('had no supported library', library)
    return {}
  }
}