Gulpfile.js for standard use

gulpfile.js

var 	gulp = require('gulp'),
	watch = require('gulp-watch'),
	sass = require('gulp-sass'),
	sourcemaps = require('gulp-sourcemaps'),
   	jshint = require('gulp-jshint'),
   	concat = require('gulp-concat'),
    	minifyCSS = require('gulp-minify-css'),
    	uglify = require('gulp-uglify'),
    	rename = require('gulp-rename');
 

// lint
gulp.task('lint', function() {
    gulp.src('assets/js/*.js')
        .pipe(jshint())
        .pipe(jshint.reporter('default'));
});
 
// compile sass
gulp.task('sass', function() {
    gulp.src('assets/scss/*.scss')
    	.pipe(sourcemaps.init())
        .pipe(sass())
        .pipe(sourcemaps.write())
        .pipe(concat('style.css'))
        .pipe(gulp.dest('assets/css'))
        .pipe(minifyCSS())
        .pipe(rename('style.min.css'))
        .pipe(gulp.dest('assets/css'));
});
 
// compile scripts
gulp.task('scripts', function() {
    gulp.src(['assets/js/src/app.js'])
    	.pipe(sourcemaps.init())
    	.pipe(sourcemaps.write())
        .pipe(concat('all.js'))
        .pipe(gulp.dest('assets/js/dist'))
        .pipe(rename('all.min.js'))
        .pipe(uglify())
        .pipe(gulp.dest('assets/js/dist'));
});
 
// default task
gulp.task('default', ['lint', 'sass', 'scripts'], function(){
    
    gulp.watch('assets/js/src/*.js', ['scripts','lint']);
    gulp.watch('assets/scss/*.scss', ['sass']);
});