rollup.config.js

const json = require('rollup-plugin-json')
const resolve = require('rollup-plugin-node-resolve')
const commentjs = require('rollup-plugin-commonjs')
const babel = require('rollup-plugin-babel')
const vue = require('rollup-plugin-vue')
const eslint = require('rollup-plugin-eslint')
const uglify = require('rollup-plugin-uglify')
const autoprefixer = require('autoprefixer')
const clean = require('postcss-clean')
const postcss = require('postcss')
const fs = require('fs')
const { version } = require('./package.json')

let production = /^production/.test(process.env.BUILD)
let min = process.env.BUILD === 'production-min'

module.exports = {
  entry: 'src/main.js',
  dest: `${production ? 'dist' : 'docs/src/croppa'}/vue-croppa${
    min ? '.min' : ''
  }.js`,
  format: 'umd',
  moduleName: 'Croppa',
  sourceMap: production ? false : 'inline',
  banner: `\
/*
 * vue-croppa v${version}
 * https://github.com/zhanziyang/vue-croppa
 * 
 * Copyright (c) ${new Date().getFullYear()} zhanziyang
 * Released under the ISC license
 */
  `,
  plugins: [
    commentjs(),
    resolve(),
    json(),
    vue({
      css: function(css, allStyles, compile) {
        postcss(min ? [autoprefixer, clean] : [autoprefixer])
          .process(css)
          .then(function(result) {
            result.warnings().forEach(function(warn) {
              console.warn(warn.toString())
            })
            fs.writeFile(
              `${production ? 'dist' : 'docs/src/croppa'}/vue-croppa${
                min ? '.min' : ''
              }.css`,
              result.css,
              err => {
                if (err) throw err
              }
            )
          })
      }
    }),
    production && eslint(),
    babel({
      presets: [
        [
          'es2015',
          {
            modules: false
          }
        ]
      ],
      plugins: ['external-helpers', 'transform-object-rest-spread'],
      exclude: 'node_modules/**'
    }),
    min &&
      uglify({
        output: {
          comments: /zhanziyang/
        }
      })
  ]
}