gulpfile.js

'use strict';

const gulp = require('gulp');
const browserSync = require('browser-sync').create();
const scss = require('gulp-sass');
const autoprefixer = require('gulp-autoprefixer');
const rename = require("gulp-rename");
const del = require('del');
const uglify = require("gulp-uglify");
const cssnano = require('gulp-cssnano');
const headerComment = require('gulp-header-comment');

const headerInfo = `
    jQuery.sendMail
    Version: 2.0.5
    Repo: https://github.com/WahaWaher/sendmail-js
    Author: Sergey Kravchenko
    Contacts: wahawaher@gmail.com
    License: MIT
`;

// BrowserSync
gulp.task('browser-sync', function() {
  browserSync.init({
    proxy: 'sendmail.js',
    notify: false,
    browser: 'chrome'
  });
});

// Препроцессор SCSS + автопрефиксер 
gulp.task('scss', function() {
    return gulp.src('demo/scss/**/*.scss')
    .pipe(scss({
      outputStyle: "expanded",
      indentType: "tab", 
      indentWidth: 1
    })).pipe(autoprefixer({
            browsers: ['last 30 versions', '> 0.5%', 'ie 9-11'], // github.com/ai/browserslist#queries
        }))
    .pipe(gulp.dest('demo/css'))
    .pipe(browserSync.stream())
});

gulp.task('default', ['browser-sync', 'scss'], function() {
  gulp.watch('demo/scss/**/*.scss', ['scss']);
  gulp.watch('demo/**/*.js').on('change', browserSync.reload);
  gulp.watch('demo/**/*.+(html|php)').on('change', browserSync.reload);
});

gulp.task('build', ['deldist', 'scss'], function() {

  gulp.src([
    'demo/js/jquery.sendmail.js'
    ])
  .pipe(headerComment(headerInfo))
  .pipe(gulp.dest('dist'));

  gulp.src('demo/js/jquery.sendmail.js')
  .pipe(uglify())
  .pipe(headerComment(headerInfo))
  .pipe(rename({ suffix: '.min' }))
  .pipe(gulp.dest('dist'));

  gulp.src(['demo/mail/sendmail.php']).pipe(gulp.dest('dist/mail'));
  gulp.src(['demo/mail/error.html']).pipe(gulp.dest('dist/mail'));
  gulp.src(['demo/mail/success.html']).pipe(gulp.dest('dist/mail'));
  gulp.src(['demo/mail/phpmailer/**/*']).pipe(gulp.dest('dist/mail/phpmailer'));

});


gulp.task('deldist', function() {
  return del.sync('dist');
});