There could be a few reasons why Gulp is not running, so here are some troubleshooting steps you can try:
1. Check that Gulp is installed globally on your machine by running `gulp -v` in the command line.
2. Make sure all the required plugins are installed. If any of them are missing, you can install them by running `npm install <plugin-name> --save-dev`.
3. Check for any errors in your Gulpfile.js, such as syntax errors or missing dependencies.
4. Make sure you are running the correct Gulp task by specifying it in the command line, for example `gulp build` or `gulp watch`.
To improve your Gulpfile.js to include the tasks you mentioned, you can add the following code snippets:
1. Processing images:
```js
const imagemin = require('gulp-imagemin');
gulp.task('images', () => {
return gulp.src('src/images/*')
.pipe(imagemin())
.pipe(gulp.dest('dist/images'));
});
```
2. Concatenating and minifying scripts:
```js
const concat = require('gulp-concat');
const uglify = require('gulp-uglify');
gulp.task('scripts', () => {
return gulp.src('src/scripts/*.js')
.pipe(concat('main.js'))
.pipe(uglify())
.pipe(gulp.dest('dist/scripts'));
});
```
3. Compiling and minifying styles:
```js
const sass = require('gulp-sass');
const cleanCSS = require('gulp-clean-css');
gulp.task('styles', () => {
return gulp.src('src/styles/*.scss')
.pipe(sass())
.pipe(cleanCSS())
.pipe(gulp.dest('dist/styles'));
});
```
4. Live reloading with BrowserSync:
```js
const browserSync = require('browser-sync').create();
gulp.task('browser-sync', () => {
browserSync.init({
server: {
baseDir: './dist'
}
});
gulp.watch('dist/**/*').on('change', browserSync.reload);
});
```
5. Cleaning the distribution folder:
```js
const del = require('del');
gulp.task('clean', () => {
return del(['dist/**']);
});
```
6. Adding autoprefixer to CSS:
```js
const autoprefixer = require('gulp-autoprefixer');
gulp.task('autoprefix', () => {
return gulp.src('dist/styles/*.css')
.pipe(autoprefixer())
.pipe(gulp.dest('dist/styles'));
});
```
You can then create a new task that runs all these subtasks in sequence, or run them individually based on your needs. Don't forget to include the required plugins at the top of your Gulpfile.js.