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Gassetic is an Assetic replacement which is based on the gulp build tool for more comfortable frontend development and dependency management

Advantages over assetic

  • Uses CSS live reload (injects modified css files into page without refreshing page)
  • Easy to setup
  • Use a package manager like Bower for JS dependencies
  • Use the gulp.js ecosystem to build your frontend assets
  • Less magic! Easy to follow development flow

How it works

Gassetic makes it easy to manage your frontend assets. You can install JS and CSS libs through a package manager like Bower and then compile them using tools from gulp.js

Gassetic replaces "<!-- {env}:{filename} --><!-- endbuild -->" strings in your templates with your generated CSS and JS files. In your gassetic.yml file you can specify which files and tasks to run on the input files and the names of the output files.

Gulp has literally hundreds of plugins that you can include in your gulpfile and process on your frontend assets.


  1. Create your gassetic config

yaml example with gassetic.yml

    less: gulp-less
    minify: gulp-minify-css
    concat: gulp-concat
    uglify: gulp-uglify
    # This section contains the formatters for the css files
        # In 'prod' mode, use these settings
            outputFolder: web/compiled/css  # The output folder for your saving your compiled files
            webPath:      /compiled/css     # The web path for the compiled files
            # Run these tasks on your compiled files
                - { name: less }
                - { name: minify }
                - { name: concat, args: '%filename%' }
            htmlTag: '<link rel="stylesheet" type="text/css" href="{{ asset("%path%") }}">' # custom html tag
        # This is the list of source files to apply the above settings
            frontend.css: # This is the output filename
                - assets/css/animate.min.css
                - assets/css/swipebox.css
                - assets/vendor/bootstrap-daterangepicker/daterangepicker-bs3.css
                - assets/vendor/bootstrap3-wysihtml5-bower/dist/bootstrap3-wysihtml5.css
                - assets/vendor/jquery-simplecolorpicker/jquery.simplecolorpicker.css
                - vendors/oh/emoji-bundle/Oh/EmojiBundle/vendor/emoji.css
                - assets/vendor/bootstrap-daterangepicker/daterangepicker-bs3.css
                - assets/css/backend.css
        # Watch these files for changes (optional)
            - assets/**/*.less
            - assets/**/*.css
    # This section contains the formatters for your JS files
            outputFolder: web/compiled/js  # Save the files here
            webPath:      /compiled/js     # Specify the web path
                - { name: concat, args: '%filename%' }
                - { name: uglify, args: { mangle: false } }
        # Here is a list of files to apply the above tasks to
            jquery.js: # This is the output filename
                - assets/vendor/jquery/jquery.js
                - web/html5lightbox/html5lightbox.js
                - assets/vendor/angular/angular.js
                - assets/vendor/angular-route/angular-route.js
                - assets/vendor/angular-sanitize/angular-sanitize.js
                - assets/js/tmp/angularApp.js/**/*.js
# This is the list of files/paths to search and find the replacement tags to insert the
# generated <script> or stylesheet tags
    - web/*.html
    - includes/**/*.html
    - js
    - css
  1. Within root of your project run:

    npm install gulp-less npm install gulp-minify-css npm install gulp-uglify npm install gulp-concat ... else that you need and have defined in the 'requires' section of the config

  2. Update your templates from


<!-- prod:frontend.css --><!-- endbuild -->

The strings "" will be searched for in the 'replacementPaths' list in the settings and replaced with the generated tags and files

  1. install gassetic npm install -g gassetic

  2. run gassetic for watching and livereloading the files

  3. run gassetic build --env=prod for production build

  4. run gassetic build --env=custom for custom build


More docs


Launch tests

npm install
npm test


  • better readme

The MIT License (MIT)

Copyright (c) 2014 Roman Schejbal