gulpfile.js

var gulp = require('gulp');
var uglify = require('gulp-uglify');
var imagemin = require('gulp-imagemin');
var browserSync = require('browser-sync');
var sass = require('gulp-sass');
var less = require('gulp-less');

// Browser-sync task, only cares about compiled CSS
gulp.task('browser-sync', function() {
    browserSync.init(["dist/**"], {
    	exclude: "dist/bower_components",
        server: {
            baseDir: "./dist"
        }
    });
});

// Sass task, will run when any SCSS files change.
gulp.task('sass', function () {
  return gulp.src('src/scss/*.scss')
        .pipe(sass({includePaths: [
          'src/scss',
          'dist/bower_components/foundation/scss',
          'dist/bower_components/foundicons'
        ]}))
        .pipe(gulp.dest('dist/css'));
});

// Less task, will run when any LESS files change.
gulp.task('less', function () {
  return gulp.src('src/less/*.less')
        .pipe(less())
        .pipe(gulp.dest('dist/css'));
});

// Minify and copy all JavaScript (except vendor scripts)
gulp.task('scripts', function() {
  return gulp.src('src/js/**/*.js')
    .pipe(uglify())
    .pipe(gulp.dest('dist/js'));
});

// Copy all static images
gulp.task('images', function() {
 return gulp.src('src/img/**')
    // Pass in options to the task
    .pipe(imagemin({optimizationLevel: 5}))
    .pipe(gulp.dest('dist/img'));
});

// Copy all static files
gulp.task('statics', function() {
  // gulp.src(['src/{equipe,programme,contact}/*.html'])
  //   .pipe(gulp.dest('dist'));
 return gulp.src(['src/**/*.html', 'src/**/*.txt', 'src/**/*.xml', 'src/**/*.pdf'])
    .pipe(gulp.dest('dist'));
});

// Clean before deploying
gulp.task('clean', function() {
  return gulp.src(['dist/css', 'dist/js', 'dist/img', 'dist/*.html', 'dist/*.txt', 'dist/*.xml'], {read: false})
    .pipe(clean());
});

// Rerun the task when a file changes
gulp.task('watch-files', function () {
  gulp.watch('src/**/*.html', ['statics']);
  gulp.watch('src/**/*.txt', ['statics']);
  gulp.watch('src/**/*.xml', ['statics']);
  gulp.watch('src/**/*.pdf', ['statics']);
  gulp.watch('src/js/**', ['scripts']);
  gulp.watch('src/img/**', ['images']);
  gulp.watch('src/scss/**', ['sass']);
  gulp.watch('src/less/**', ['less']);
});

// The default task (called when you run `gulp` from cli)
gulp.task('default', ['statics', 'scripts', 'images', 'less', 'sass']);
gulp.task('watch', ['statics', 'scripts', 'images', 'less', 'sass', 'browser-sync', 'watch-files']);