gulpfile.js

const gulp = require('gulp');
const imagemin = require('gulp-imagemin');
const uglify = require('gulp-uglify');
const sass = require('gulp-sass');
const concat = require('gulp-concat');


gulp.task('message', function() {
  return console.log('Gulp is running');
});



gulp.task('copyHtml', function() {
  gulp.src('src/*.html')
      .pipe(gulp.dest('dist'));
});



//optimize images

gulp.task('imageMin', () => {
  gulp.src('src/images/*')
  .pipe(imagemin())
  .pipe(gulp.dest('dist/images'))
});


//minify js
gulp.task('minify', function() {
  gulp.src('src/js/*.js')
  .pipe(uglify())
  .pipe(gulp.dest('dist/js'));
});


//compile sass

gulp.task('sass', function() {
    gulp.src('src/sass/*.scss')
    .pipe(sass().on('error', sass.logError))
    .pipe(gulp.dest('dist/css'));
});


//scripts

gulp.task('scripts', function() {
  gulp.src('src/js/*.js')
  .pipe(concat('main.js'))
  .pipe(uglify())
  .pipe(gulp.dest('dist/js'));
});



gulp.task('default', ['message', 'copyHtml', 'imageMin', 'sass', 'scripts']);

gulp.task('watch', function() {
  gulp.watch('src/js/*.js', ['scripts']);
  gulp.watch('src/images/*', ['imageMin']);
  gulp.watch('src/sass/*.scss', ['sass']);
  gulp.watch('src/*.html', ['copyHtml']);
});