Basic Gulp File

var gulp = require('gulp');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify')
var uglifycss = require('gulp-uglifycss');
var ngAnnotate = require('gulp-ng-annotate');
var server = require('gulp-webserver');
var htmlmin = require('gulp-htmlmin');

var watcher = gulp.watch(['./src/js/**/*.js', './src/styles/*.scss', './src/views/**/**/*.html', './src/*.html'], ['default']); 
watcher.on('change', function( event ) {
        console.log('File ' + event.path + ' was ' + event.type + ' at ' + new Date() + ' , running tasks...');
});

gulp.task('styles', function(){
  gulp.src('./src/styles/*.css')
    .pipe(uglifyCss())
    .pipe(concat('styles.css'))
    .pipe(gulp.dest('./public/'));
});

gulp.task('javascript', function() {
    gulp.src('./src/js/**/*.js')
        .pipe(ngAnnotate())
        .pipe(uglify())
        .pipe(concat('all.min.js'))
        .pipe(gulp.dest('./public/app.min.js'))
});
gulp.task('html', function() {
    gulp.src('./src/views/**/*.html')
        .pipe(htmlmin({collapseWhitespace: true}))
        .pipe(gulp.dest('./public/views'))
});
gulp.task('index', function() {
    gulp.src('./src/*.html')
        .pipe(htmlmin({collapseWhitespace: true}))
        .pipe(gulp.dest('./public'))
});
gulp.task('default', ['style', 'javascript', 'html', 'index']);