gistfile1.js

var gulp = require('gulp');
var path = require('path');
var fs = require('fs');

var paths = {
    sass: {
        watch: '../dev/sass/**/*.scss',
        dest: '../web/assets/css/',
        project: path.join(__dirname, '../dev')
    },
    js: {
        watch: '../dev/js/*.js',
        dest: path.join(__dirname, '../web/assets/js/')
    }
};

gulp.task('watch', function() {
    gulp.start('js');

    var watch = require('gulp-watch');
    watch(paths.sass.watch, ['sass']);
});

gulp.task('sass', function() {
    var compass = require('gulp-compass');
    gulp.src(paths.sass.watch)
        .pipe(compass({
            project: paths.sass.project,
            css: paths.sass.dest,
            sass: 'sass',
            //style: 'compressed'
        })).on('error', function(err) {
            // Would like to catch the error here
        });
});


gulp.task('js', function() {
    var requires = {
        'angular': './lib/angular-browserify.js',
        'angular-ui-router': 'angular-ui-router',
        'angular-translate': './lib/src/angular-translate/angular-translate.min.js',
        'app': '../dev/js/app'
    };

    var entries = [{
        dest: paths.js.dest,
        debug: 'main.debug.js',
        min: 'main.min.js',
        entry: '../dev/js/main.js'
    }];

    entries.forEach(function (entry) {
        createWatch(requires, entry);
    });
});


function createWatch(requires, obj) {
    var w = require('watchify')();
    var streamify = require('gulp-streamify');
    var uglify = require('gulp-uglify');
    var source = require('vinyl-source-stream');

    var dest = obj.dest,
        min = obj.min,
        debug = obj.debug,
        entry = obj.entry;

    Object.keys(requires).forEach(function(name) {
        w.require(requires[name], {
            expose: name
        });
    });


    w.require(entry, {
        entry: true
    });

    function build() {
        w.bundle()
            .pipe(source(min))
            .pipe(streamify(uglify({
                mangle: false
            })))
            .pipe(gulp.dest(dest));

        w.bundle({
            debug: true
        })
            .pipe(source(debug))
            .pipe(gulp.dest(dest));
    }

    w.on('update', function() {
        build();
    });

    w.on('log', function(msg) {
        console.log(msg);
    });


    build();

};