gulpfile.js

const gulp = require('gulp')
const babel = require('gulp-babel')
const uglify = require('gulp-uglify')
const rename = require('gulp-rename')
const replace = require('gulp-replace')
const clean = require('gulp-clean')
const sass = require('gulp-sass')
const cleanCSS = require('gulp-clean-css')
const prefixer = require('gulp-autoprefixer')

const components = [
  'table',
  'column',
  'cell',
  'header',
  'body',
  'footer',
  'filter',
  'loading',
  'menu',
  'toolbar',
  'grid',
  'pager',
  'checkbox',
  'radio',
  'input',
  'button',
  'message',
  'tooltip',

  'icon',
  'export',
  'resize',
  'v-x-e-table'
]

gulp.task('build_modules', () => {
  return gulp.src('packages/**/*.js')
    .pipe(babel({
      presets: ['@babel/env']
    }))
    .pipe(gulp.dest('lib'))
    .pipe(uglify())
    .pipe(rename({
      suffix: '.min',
      extname: '.js'
    }))
    .pipe(gulp.dest('lib'))
})

gulp.task('build_locale', () => {
  return gulp.src('locale/**/*.js')
    .pipe(babel({
      presets: ['@babel/env']
    }))
    .pipe(gulp.dest('lib/locale'))
    .pipe(uglify())
    .pipe(rename({
      suffix: '.min',
      extname: '.js'
    }))
    .pipe(gulp.dest('lib/locale'))
})

gulp.task('build_rename', () => {
  return Promise.all([
    gulp.src('lib/index.umd.js')
      .pipe(rename({
        basename: 'index',
        extname: '.js'
      }))
      .pipe(gulp.dest('lib')),
    gulp.src('lib/index.umd.min.js')
      .pipe(rename({
        basename: 'index',
        suffix: '.min',
        extname: '.js'
      }))
      .pipe(gulp.dest('lib'))
  ])
})

gulp.task('build_style', gulp.series('build_modules', 'build_locale', () => {
  return Promise.all(components.map(name => {
    Promise.all([
      gulp.src('styles/index.js')
        .pipe(gulp.dest(`lib/${name}/style`)),
      gulp.src(`styles/${name}.scss`)
        .pipe(replace(/(\/\*\*Variable\*\*\/)/, `@import './variable.scss';\n`))
        .pipe(sass())
        .pipe(prefixer({
          borwsers: ['last 1 version', '> 1%', 'not ie <= 8'],
          cascade: true,
          remove: true
        }))
        .pipe(cleanCSS())
        .pipe(rename({
          basename: 'style',
          extname: '.css'
        }))
        .pipe(gulp.dest(`lib/${name}/style`))
    ])
  }))
}))

gulp.task('build_clean', gulp.series('build_style', 'build_rename', () => {
  return gulp.src([
    'lib/demo.html'
  ])
    .pipe(clean())
}))

gulp.task('build', gulp.parallel('build_clean'))