Common gulpfile

gulpfile.js

var lr = require('tiny-lr'), 
    gulp = require('gulp'), 
    nib = require('nib'),
    jade = require('gulp-jade'), 
    stylus = require('gulp-stylus'),
    livereload = require('gulp-livereload'), 
    myth = require('gulp-myth'), 
    csso = require('gulp-csso'), 
    imagemin = require('gulp-imagemin'),
    uglify = require('gulp-uglify'),
    concat = require('gulp-concat'), 
    sourcemaps = require('gulp-sourcemaps'),
    connect = require('gulp-connect'), 
    insert = require('gulp-insert'),
    uglify = require('gulp-uglify'),
    resolveDependencies = require('gulp-resolve-dependencies')
    server = lr();

var comment = '/*\n' +
                '* An Angular module for token based authentication *\n' +
                '* @version v0.0.1 - 2016-06-16 *\n' +
                '* @link https://github.com/Mr-Zoidberg/ngAuthenticate *\n' +
                '* @author Dan Kashkovsky <[email protected]> *\n' +
                '* @license MIT License, http://www.opensource.org/licenses/MIT *\n' +
                '*/ \n';

//init stylus
    gulp.task('stylus', function() {
    gulp.src('./assets/stylus/screen.styl')
        .pipe(stylus({
            use: ['nib']
        })) 
    .on('error', console.log) 
    .pipe(myth()) 
    .pipe(gulp.dest('./src/css/')) 
    .pipe(connect.reload()); 
});

//create local server
gulp.task('http-server', function() {
    connect
        .server({
            port: 89898,
            root: './src/',
            livereload: true
        });
});

gulp.task('http-server-close', function() {
    connect.serverClose();
});

gulp.task('jade', function() {
    gulp.src(['./assets/template/*.jade', '!./assets/template/_*.jade'])
        .pipe(jade({
            pretty: true
        }))  
        .on('error', console.log) 
    .pipe(gulp.dest('./src/')) 
    .pipe(connect.reload());
}); 

// compile JS
gulp.task('min-js', function() {
    gulp.src(['./src/js/app.js', './src/js/interceptor.js', './src/js/service.js', './src/js/directive.js', './src/js/config.js', '!./assets/js/vendor/*.js', '!./assets/js/vendor/**/*.js'])
        .pipe(resolveDependencies({
            pattern: /\* @requires [\s-]*(.*\.js)/g
            }))
        .on('error', function(err) {
            console.log(err.message);
        })
        .pipe(concat('angular-authenticate.min.js'))
        .pipe(insert.wrap('(function(){ "use strict", ', '})();'))
        .pipe(insert.transform(function (contents) {
            return comment + contents;
        }))
        
        .pipe(uglify({
            preserveComments: 'all'
        }))
        .pipe(gulp.dest('./build/minified'))
        .pipe(connect.reload()); 
});

gulp.task('js', ['min-js'], function() {
    gulp.src(['./src/js/app.js', './src/js/interceptor.js', './src/js/service.js', './src/js/directive.js', './src/js/config.js', '!./assets/js/vendor/*.js', '!./assets/js/vendor/**/*.js'])
        .pipe(resolveDependencies({
            pattern: /\* @requires [\s-]*(.*\.js)/g
            }))
        .on('error', function(err) {
            console.log(err.message);
        })
        .pipe(concat('angular-authenticate.js', {newLine: '\r\n'}))
        .pipe(insert.wrap('(function(){ "use strict", ', '})();'))
        .pipe(insert.transform(function (contents) {
            return comment + contents;
        }))
        .pipe(gulp.dest('./build/unminified'))
        .pipe(connect.reload()); 
});

gulp.task('images', function() {
    gulp.src('./assets/img/**/*')
        .pipe(imagemin())
        .pipe(gulp.dest('./src/img'))
        .pipe(connect.reload()); 
});

gulp.task('watch', ['stylus', 'jade', 'images', 'js', 'http-server'], function() {

    gulp.watch('assets/stylus/**/*.styl', function() {
            gulp.run('stylus');
        });
        gulp.watch('assets/template/**/*.jade', function() {
            gulp.run('jade');
        });
        gulp.watch('assets/img/**/*', function() {
            gulp.run('images');
        });
        gulp.watch('./src/js/*', function() {
            gulp.run('js');
        });
});

gulp.task('build', function() {
   // css
    gulp.src('./assets/stylus/screen.styl')
        .pipe(stylus({
            use: ['nib']
        })) 
    .pipe(myth()) 
    .pipe(csso()) 
    .pipe(gulp.dest('./build/css/'));

    // jade
    gulp.src(['./assets/template/*.jade', '!./assets/template/_*.jade'])
        .pipe(jade())
        .pipe(gulp.dest('./build/'))

    // js
    gulp.src(['./assets/js/**/*.js', '!./assets/js/vendor/**/*.js'])
        .pipe(concat('angular-authenticate.js'))
        .pipe(uglify())
        .pipe(gulp.dest('./build/js'));

    // image
    gulp.src('./assets/img/**/*')
        .pipe(imagemin())
        .pipe(gulp.dest('./build/img'))
});