Example gulpfile for complete set-up.

gulpfile.js

var gulp = require('gulp');
var browserify = require('gulp-browserify');
var concat = require('gulp-concat');
var less = require('gulp-less');
var refresh = require('gulp-livereload');
var lr = require('tiny-lr');
var server = lr();
var minifyCSS = require('gulp-minify-css');
var embedlr = require('gulp-embedlr');

gulp.task('scripts', function() {
    gulp.src(['app/src/**/*.js'])
        .pipe(browserify())
        .pipe(concat('dest.js'))
        .pipe(gulp.dest('dist/build'))
        .pipe(refresh(server))
})

gulp.task('styles', function() {
    gulp.src(['app/css/style.less'])
        .pipe(less())
        .pipe(minifyCSS())
        .pipe(gulp.dest('dist/build'))
        .pipe(refresh(server))
})

gulp.task('lr-server', function() {
    server.listen(35729, function(err) {
        if(err) return console.log(err);
    });
})

gulp.task('html', function() {
    gulp.src("app/*.html")
        .pipe(embedlr())
        .pipe(gulp.dest('dist/'))
        .pipe(refresh(server));
})

gulp.task('default', function() {
    gulp.run('lr-server', 'scripts', 'styles', 'html');

    gulp.watch('app/src/**', function(event) {
        gulp.run('scripts');
    })

    gulp.watch('app/css/**', function(event) {
        gulp.run('styles');
    })

    gulp.watch('app/**/*.html', function(event) {
        gulp.run('html');
    })
})

gulp.run() is deprecated. Now what?

Great! Thanks for the clean code!
Anyways, may I ask if someone could comment the code out so to be more specific about what is actually happening? It would be nice especially for people using gulp for the first times... like me! :)

@Maelfyn a late response but I think now you must use the array of pre-tasks in the gulp.task function (as the second parameter)