gulpfile.js

"use strict";

var gulp = require("gulp");
var sass = require("gulp-sass");
var plumber = require("gulp-plumber");
var postcss = require("gulp-postcss");
var autoprefixer = require("autoprefixer");
var server = require("browser-sync").create();
var minify = require("gulp-csso");
var rename = require("gulp-rename");
var imagemin = require("gulp-imagemin");
var webp = require("gulp-webp");
var del = require("del");
var run = require("run-sequence");

gulp.task("style", function() {
  gulp.src("source/sass/style.scss")
    .pipe(plumber())
    .pipe(sass())
    .pipe(postcss([
      autoprefixer()
    ]))
    .pipe(gulp.dest("source/css")) //поменять на build
    .pipe(minify())
    .pipe(rename("style.min.css"))
    .pipe(gulp.dest("source/css")) //поменять на build
    .pipe(server.stream());
});

gulp.task("images", function() {
  return gulp.src("source/img/**/*.{png,jpg,svg}")
  .pipe(imagemin([
    imagemin.opting({optimizationLevel: 3}),
    imagemin.jpgtran({progressive: true}),
    imagemin.svgo()
  ]))
  .pipe(gulp.dest("source/img"));
});

gulp.task("webp", function() {
  return gulp.src("source/img/**/*.{png,jpg}")
  .pipe(webp({quality: 90}))
  .pipe(gulp.dest("source/img"));
})

gulp.task("serve", function() {
  server.init({
    server: "source/", //поменять на build
    notify: false,
    open: true,
    cors: true,
    ui: false
  });

  gulp.watch("source/sass/**/*.{scss,sass}", ["style"]);
  gulp.watch("source/js/*.js").on("change", server.reload);
  gulp.watch("source/*.html").on("change", server.reload);
});

gulp.task("copy", function() {
  return gulp.src([
    "source/fonts/**/*.{woff,woff2}",
    "source/img/**",
    "source/js/**",
    "source/*.html"
  ], {
    base: "source"
  })
  .pipe(gulp.dest("build"));
});

gulp.task("clean", function() {
  return del("build");
});

gulp.task("build", function(done) {
  run(
    "clean",
    "copy",
    "style",
    done
  );
});

gulp.task("sync", function(done) {
  run(
    "style",
    "serve",
    done
  );
});